Publications

Michael A. Duncan

Selected Publications

  1. J. E. Colley, A. G. Batchelor, M. A. Duncan, "Cation-π Bonding in Actinides: UOx+(Benzene) (x = 0,1,2) Complexes Studied with Threshold Photodissociation Spectroscopy and Theory," J. Phys. Chem. Lett. 16, 1515−1521 (2025).  DOI: 10.1021/acs.jpclett.4c03603.
  2. I. J. Webster, J. H. Marks, M. A. Duncan, "Laser Desorption Mass Spectrometry of Rubrene and Photodissociation of Its Cation," Int. J. Mass Spectrom. 503, 117280 (2024).  DOI: 10.1016/j.ijms.2024.117280.
  3. A. G. Batchelor, J. H. Marks, T. B. Ward, M. A. Duncan, "Co+(C2H2)n Complexes Studied with Infrared Photodissociation Spectroscopy and Theory," J. Phys. Chem. A 128, 8954−8963 (2024).  DOI: 10.1021/acs.jpca.4c05304.
  4. J. E. Colley, N. J. Dynak, J. R. C. Blais, M. A. Duncan, "Photodissociation Spectroscopy and Photofragment Imaging of the Mg+(Benzene) Complex," J. Phys. Chem. A 128, 10507-10515 (2024).  DOI: 10.1021/acs.jpca.4c05703.
  5. J. E. Colley, N. J. Dynak, J. R. C. Blais, M. A. Duncan, "Photodissociation Spectroscopy and Photofragment Imaging to Probe the Dissociation Energy of the Fe+(Acetylene) Complex," J. Phys. Chem. A 127, 1244‒1251 (2023).  DOI: 10.1021/acs.jpca.2c08456.
  6. J. E. Colley, N. J. Dynak, J. R. C. Blais, M. A. Duncan, "Photodissociation Spectroscopy and Photofragment Imaging to Probe the Dissociation Energies of the Fe+(Benzene)1,2 Complexes," J. Phys. Chem. A 127, 2795‒2804 (2023).  DOI: 10.1021/acs.jpca.3c00735.  Erratum: J. Phys. Chem. A 128, 5224−5224 (2024).  DOI: 10.1021/acs.jpca.4c03633.
  7. J. E. Colley, D. S. Orr, M. A. Duncan, "Charge-Transfer Spectroscopy of Ag+(Benzene) and Ag+(Toluene)," J. Phys. Chem. A 127, 4822–4831 (2023). DOI: 10.1021/acs.jpca.3c01790.
  8. A. G. Batchelor, J. H. Marks, T. B. Ward, M. A. Duncan, "Pt+(C2H2)n Complexes Studied with Infrared Photodissociation Spectroscopy," J. Phys. Chem. A 127, 5704−5712 (2023).  DOI: 10.1021/acs.jpca.3c02734.
  9. A. D. Brathwaite, J. H. Marks, I. J. Webster, A. G. Batchelor, T. B. Ward, M. A. Duncan, "Coordination and Spin States in Fe+(C2H2)n Complexes Studied with Infrared Spectroscopy," J. Phys. Chem. A 126, 9680‒9690 (2022).  DOI: 10.1021/acs.jpca.2c07556.
  10. N. J. Dynak, B. M. Rittgers, J. E. Colley, D. J. Kellar, M. A. Duncan, "Photofragment Imaging of Carbon Cluster Cations: Explosive Ring Rupture," J. Phys. Chem. Lett. 13, 4786−4793 (2022).  DOI: 10.1021/acs.jpclett.2c00950.
  11. B. M. Rittgers, J. H. Marks, D. J. Kellar, M. A. Duncan, "Photoinduced Charge Transfer in the Zn-Methanol Cation Studied with Selected-Ion Photofragment Imaging," J. Chem. Phys. 157, 114302 (2022). DOI: 10.1063/5.0108467.
  12. J. E. Colley, D. S. Orr, M. A. Duncan, "Electronic Transition of l-C6+ at 417 nm," J. Chem. Phys. 157, 121102 (2022).  DOI: 10.1063/5.0106183.
  13. A. B. McCoy, M. A. Duncan, "Spectral Signatures of Anharmonicity in the Vibrational Spectrum of Protonated Ethylene," J. Molec. Spec. 389, 111704 (2022).  DOI: 10.1016/j.jms.2022.111704.
  14. I. J. Webster, J. L. Beckham, N. D. Johnson, M. A. Duncan, "Photochemical Synthesis and Spectroscopy of Covalent PAH Dimers," J. Phys. Chem. A 126, 1144-1157 (2022). DOI: 10.1021/acs.jpca.1c10606.
  15. J. P. Wagner, D. C. McDonald, P. R. Franke, M. A. Duncan, "Infrared Spectroscopy of the Protonated HCl Dimer and Trimer," J. Chem. Phys. 155, 134302 (2021). DOI: 10.1063/5.0065477.
  16. J. H. Marks, B. M. Rittgers, M. J. van Stipdonk, M. A. Duncan, "Photodissociation and Infrared Spectroscopy of Uranium-Nitrogen Cation Complexes," J. Phys. Chem. A 125, 7278−7288 (2021). (Dan Neumark Festschrift).  DOI: 10.1021/acs.jpca.1c05823.
  17. J. H. Marks, E. Miliordos, M. A. Duncan, "Infrared Spectroscopy of RG-Co+(H2O) Complexes (RG = Ar, Ne, He): The Role of Rare Gas "Tag" Atoms," J. Chem. Phys. 154, 064306 (2021).  DOI: 10.1063/5.0041069.
  18. B. M. Rittgers, D. Leicht, M. A. Duncan, "Cation-π Complexes of Silver Studied with Photodissociation and Velocity-Map Imaging," J. Phys. Chem. A 124, 9166-9176 (2020).  DOI: 10.1021/acs.jpca.0c08498.
  19. D. Leicht, G. E. Douberly, J. P. Wagner, D. C. McDonald, D. T. Mauney, M. Tsuge, Y.-P. Lee, M. A. Duncan, "Infrared Spectroscopy of the H+(CO)2 Ion in the Gas Phase and in para-Hydrogen Matrices," J. Chem. Phys. 153, 084305 (2020).  DOI: 10.1063/5.0019731.
  20. A. D. Brathwaite, T. B. Ward, J. H. Marks, M. A. Duncan, "Coordination and Solvation in Gas Phase Ag+(C2H2)n Complexes Studied with Selected-Ion Infrared Spectroscopy," J. Phys. Chem. A 124, 8562-8573 (2020).  DOI: 10.1021/acs.jpca.0c08081.
  21. D. C. McDonald II, B. M. Rittgers, R. A. Theis, R. C. Fortenberry, J. H. Marks, D. Leicht, M. A. Duncan, "Infrared Spectroscopy and Anharmonic Theory of H3+Ar2,3 Complexes: The Role of Symmetry in Solvation," J. Chem. Phys. 153, 134305 (2020).  DOI: 10.1063/5.0023205.
  22. J. H. Marks, T. B. Ward, A. D. Brathwaite, M. A. Duncan, "Infrared Spectroscopy of Zn(Acetylene)n+ Complexes: Ligand Activation and Nascent Polymerization," J. Phys. Chem. A 124, 4764−4776 (2020).  DOI: 10.1021/acs.jpca.0c03358.
  23. M. A. Boyer, C. S. Chiu, D. C. McDonald II, J. P. Wagner, J. E. Colley, D. S. Orr, M. A. Duncan, A. B. McCoy, "The Role of Tunneling in the Spectra of H5+ and D5+ up to 7300 cm-1," J. Phys. Chem. A 124, 4427–4439 (2020).  DOI: 10.1021/acs.jpca.0c02299.
  24. P. R. Franke, M. A. Duncan, G. E. Douberly, "Infrared Photodissociation Spectroscopy and Anharmonic Vibrational Study of the HO4+ Molecular Ion," J. Chem. Phys. 152, 174309 (2020). DOI: 10.1063/5.0005975.
  25. J. H. Marks, P. Kahn, M. Vasiliu, D. A. Dixon, M. A. Duncan, "Photodissociation and Theory to Investigate Uranium Oxide Cluster Cations," J. Phys. Chem. A 124, 1940−1953 (2020).  DOI: 10.1021/acs.jpca.0c00453
  26. P. D. Carnegie, J. H. Marks, A. D. Brathwaite, T. B. Ward, M. A. Duncan, "Microsolvation in V+(H2O)n Clusters Studied with Selected-Ion Infrared Spectroscopy," J. Phys. Chem. A 124, 1093−1103 (2020).  DOI: 10.1021/acs.jpca.9b11275.
  27. J. H. Marks, T. B. Ward, A. D. Brathwaite, S. Ferguson, M. A. Duncan, "Cyclotrimerization of Acetylene in Gas Phase V+(C2H2)n Complexes: Detection of Intermediates and Products with Infrared Spectroscopy," J. Phys. Chem. A 123, 6733-6743 (2019).  DOI: 10.1021/acs.jpca.9b04962.
  28. M. A. Duncan, "Metal Cation Coordination and Solvation Studied with Infrared Spectroscopy in the Gas Phase," in Physical Chemistry of Cold Gas Phase Functional Molecules and Clusters, T. Ebata and M. Fujii, eds., Springer, Berlin, 2019.
  29. J. P. Wagner, S. M. Giles, M. A. Duncan, "Gas Phase Infrared Spectroscopy of the Methaniminium Cation," Chem. Phys. Lett. 726, 53-56 (2019).  DOI: 10.1016/j.cplett.2019.04.032.
  30. M. P. Woodard, M. A. Duncan, "Laser Synthesis and Spectroscopy of Molybdenum Oxide Nanorods," J. Phys. Chem. C 123, 9560-9566 (2019).  DOI: 10.1021/acs.jpcc.9b00627.
  31. J. H. Marks, T. B. Ward, M. A. Duncan, "Infrared Spectroscopy of the Coordination and Solvation in Cu+(Ethylene)n (n = 1-9) Complexes," Int. J. Mass Spectrom. 435, 107-113 (2019). (Helmut Schwarz festschrift).  DOI: 10.1016/j.ijms.2018.10.008.
  32. D. C. McDonald II, J. P. Wagner, A. B. McCoy, M. A. Duncan, "Near-Infrared Spectroscopy of Protonated Water Clusters: Higher Elevations in the Hydrogen Bonding Landscape," J. Phys. Chem. Lett. 9, 5664–5671 (2018).  DOI: 10.1021/acs.jpclett.8b02499.
  33. J. P. Wagner, D. C. McDonald II, M. A. Duncan, "Mid-Infrared Spectroscopy of C7H7+ Isomers in the Gas Phase: Benzylium and Tropylium," J. Phys. Chem. Lett. 9, 4591–4595 (2018).  DOI: 10.1021/acs.jpclett.8b02121.
  34. D. C. McDonald II, J. P. Wagner, M. A. Duncan, "Infrared Photodissociation Spectroscopy of the H6+ Cation in the Gas Phase," J. Chem. Phys. 149, 031105 (2018). (communication; selected as Feature Article) DOI: 10.1063/1.5043425.
  35. J. P. Wagner, D. C. McDonald II, M. A. Duncan, "Spectroscopy of Proton Coordination with Ethylenediamine," J. Phys. Chem. A 122, 5168−5176 (2018). DOI:10.1021/acs.jpca.8b03592.
  36. M. P. Woodard, S. T. Akin, C. J. Dibble, M. A. Duncan, "Synthesis and Spectroscopy of Ligand-Coated Chromium Oxide Nanoclusters," J. Phys. Chem. A 122, 3606–3620 (2018).  DOI: 10.1021/acs.jpca.8b01219.
  37. J. H. Marks, T. B. Ward, M. A. Duncan, "Photodissociation of Manganese Oxide Cluster Cations," J. Phys. Chem. A 122, 3383−3390 (2018).  DOI: 10.1021/acs.jpca.8b01441.
  38. J. P. Wagner, D. C. McDonald II, M. A. Duncan, "An Argon-Oxygen Covalent Bond in the ArOH+ Molecular Ion," Angew. Chem., Int. Ed. 57, 5081-5085 (2018).  (communication) DOI: 10.1002/anie.201802093.
  39. D. C. McDonald, J. P. Wagner, M. A. Duncan, "Mid-/Near-IR Spectroscopy and Anharmonic Theory of the H2Cl+Ar Cation Complex," Chem. Phys. Lett. 691, 51-55 (2018).  DOI: 10.1016/j.cplett.2017.10.056.
  40. T. B. Ward, A. D. Brathwaite, M. A. Duncan, "Infrared Spectroscopy of Au(Acetylene)n+ Complexes in the Gas Phase," Top. Catal. 61, 49–61 (2018).  DOI: 10.1007/s11244-017-0859-0.
  41. D. T. Mauney, J. A. Maner, M. A. Duncan, "IR Spectroscopy of Protonated Acetylacetone and its Water Clusters: Enol-Keto Tautomers and Ion→Solvent Proton Transfer," J. Phys. Chem. A 121, 7059-7069 (2017).  DOI: 10.1021/acs.jpca.7b07180.
  42. J. P. Wagner, D. C. McDonald II, M. A. Duncan, "Near-Infrared Spectroscopy and Anharmonic Theory of the H2O+Ar1,2 Cation Complexes," J. Chem. Phys. 147, 104302 (2017).  DOI: 10.1063/1.4998419.
  43. J. P. Wagner, M. A. Bartlett, W. D. Allen, M. A. Duncan, "Tunneling Isomerizations on the Potential Energy Surfaces of Formaldehyde and Methanol Radical Cations," ACS Earth Space Chem. 1, 361-367 (2017).  DOI: 10.1021/acsearthspacechem.7b00068.
  44. T. B. Ward, E. Miliordos, P. D. Carnegie, S. S. Xantheas, M. A. Duncan, "Ortho-Para Interconversion in Cation-Water Complexes: The Case of V+(H2O) and Nb+(H2O) Clusters,"  J. Chem. Phys.146, 224305 (2017).  DOI: 10.1063/1.4984826.
  45. J. A. Maner, D. T. Mauney, M. A. Duncan, "Velocity Map Ion Imaging of Ar2+ Photodissociation," Chem. Phys. Lett. 671, 182-185 (2017).  DOI: 10.1016/j.cplett.2017.01.042.  (Editor's Choice article).
  46. D. C. McDonald, D. T. Mauney, D. Leicht, J. H. Marks, J. A. Tan, J.-L. Kuo, M. A. Duncan, "Trapping a proton in argon: Spectroscopy and theory of the proton-bound argon dimer and its solvation," J. Chem. Phys. 145, 231101 (2016).  DOI: 10.1063/1.4972581.
  47. D. T. Mauney, J. D. Mosley, L. R. Madison, A. B. McCoy, M. A. Duncan, "Infrared spectroscopy and theory of formaldehyde cation and its hydroxymethylene isomer," J. Chem. Phys. 145, 174303 (2016). DOI: 10.1063/1.4966214.
  48. A. D. Brathwaite, H. L. Abbott-Lyon, M. A. Duncan, "Distinctive coordination of CO vs N2 to rhodium cations: An infrared and computational study," J. Phys. Chem. A 120, 7659-7670 (2016).  DOI: 10.1021/acs.jpca.6b07749.
  49. T. B. Ward, P. D. Carnegie, M. A. Duncan, "Infrared spectroscopy of the Ti(H2O)Ar+ ion-molecule complex: Electronic state switching induced by argon," Chem. Phys. Lett. 654, 1–5 (2016).  DOI: 10.1016/j.cplett.2016.04.065. (Editor's Choice article)
  50. S. T. Akin, S. G. Ard, B. E. Dye, H. F. Schaefer, M. A. Duncan, "Photodissociation of cerium oxide nanocluster cations," J. Phys. Chem. A 120, 2313-2319 (2016).  DOI: 10.1021/acs.jpca.6b02052.
  51. D. Leicht, T. C. Cheng, and M. A. Duncan, "Infrared spectroscopy of the glyoxal radical cation: The charge dependence of internal rotation," Chem. Phys. Lett. 643, 89–92  (2016). DOI: 10.1016/j.cplett.2015.11.018.
  52. J. A. Maner, D. T. Mauney and M. A. Duncan, "Imaging charge transfer in a cation-π system: Velocity-map imaging of Ag+(benzene) photodissociation," J. Phys. Chem. Lett. 6, 4493−4498 (2015). DOI: 10.1021/acs.jpclett.5b02240.
  53. T. W. Odum, R. M. Dickson, M. A. Duncan and W. Tan, "Shining a light on the molecular and nanoscopic worlds, ACS Photonics 2, 787−789 (2015).DOI: 10.1021/acsphotonics.5b00337
  54. M. K. Assefa, J. L. Devera, A. D. Brathwaite, J. D. Mosley and M. A. Duncan, "Vibrational scaling factors for transition metal carbonyls," Chem. Phys. Lett. 640, 175−179 (2015). DOI:10.1016/j.cplett.2015.10.031.
  55. A. D. Brathwaite, T. B. Ward, R. S. Walters, and M. A. Duncan, "Cation-π and CH-π Interactions in the Coordination and Solvation of Cu+(acetylene)n Complexes," J. Phys. Chem. A 119, 5658–5667 (2015). DOI: 10.1021/acs.jpca.5b03360.
  56. J. D. Mosley, J. W. Young, M. Huang, A. B. McCoy, M. A. Duncan, "Infrared spectroscopy of the methanol cation and its methylene-oxonium isomer," J. Chem. Phys. 142, 114301 (2015).  DOI: 10.1063/1.4914146.
  57. M. A. Duncan, "Early Days in the Rick Smalley Lab," in C60 Buckminsterfullerene: Some Inside Stories, Harry Kroto, ed., Pan Stanford Publishing Pte., Ltd., Singapore (2015).
  58. J. D. Mosley, J. W. Young, M. A. Duncan, "Infrared spectroscopy of the acetyl cation and its protonated ketene isomer," J. Chem. Phys. 141, 024306/1-7 (2014).  DOI: 10.1063/1.4887074.
  59. K. N. Reishus, A. D. Brathwaite, J. D. Mosley, M. A. Duncan, "Infrared Spectroscopy of Coordination versus Solvation in Al+(benzene)1-4 Complexes," J. Phys. Chem. A 118, 7516−7525 (2014) (Ken Jordan festschrift).  DOI: 10.1021/jp500778w.
  60. A. D. Brathwaite, J. A. Maner, M. A. Duncan, "Testing the Limits of the 18-Electron Rule: The Gas Phase Carbonyls of Sc+ and Y+," Inorg. Chem. 53, 1166–1169 (2014).  DOI: 10.1021/ic402729g.
  61. T. M. Ayers, S. T. Akin, C. J. Dibble, M. A. Duncan, "Laser Desorption Time-of-Flight Mass Spectrometry of Inorganic Nanoclusters: An Experiment for Physical Chemistry or Advanced Instrumentation Laboratories," J. Chem. Educ. 91, 291–296 (2014).  DOI: 10.1021/ed4003942.
  62. A. D. Brathwaite, A. M. Ricks, M. A. Duncan, "Infrared Spectroscopy of Vanadium Oxide Carbonyl Cations," J. Phys. Chem. A 117, 13435−13442 (2013). (Terry Miller festschrift) DOI: 10.1021/jp4068697.
  63. A. M. Ricks, A. D. Brathwaite, M. A. Duncan, "IR Spectroscopy of V+(CO2)n Clusters: Solvation-Induced Electron Transfer and Activation of CO2," J. Phys. Chem. A 117, 11490–11498 (2013).  DOI: 10.1021/jp4089035.
  64. T. C. Cheng, S. T. Akin, C. J. Dibble, S. Ard, M. A. Duncan, "Tunable infrared laser desorption and ionization of fullerene films," Int. J. Mass. Spectrom. 354–355, 159–164 (2013). (Detlef Schröder Memorial Issue) DOI: 10.1016/j.ijms.2013.05.031.
  65. A. D. Brathwaite, M. A. Duncan, " Infrared photodissociation spectroscopy of saturated group IV (Ti, Zr, Hf) metal carbonyl cations," J. Phys. Chem. A 117, 11695-11703 (2013). (Curt Wittig Festschrift) DOI: 10.1021/jp400793h.
  66. B. Bandyopadhyay, K. N. Reishus, M. A. Duncan, " Infrared spectroscopy of solvation in small Zn+(H2O)n Complexes," J. Phys. Chem. A 117, 7794−7803 (2013).  DOI: 10.1021/jp4046676.
  67. J. W. Young, T. C. Cheng, B. Bandyopadhyay, M. A. Duncan, "Infrared photodissociation spectroscopy of H7+, H9+ and their deuterated analogs," J. Phys. Chem. A 117, 6984–6990 (2013). (Joel Bowman Festscrift) DOI: 10.1021/jp312630x.
  68. A. M. Ricks, A. D. Brathwaite, M. A. Duncan, "Coordination and spin states of V+(CO)n clusters revealed by IR spectroscopy," J. Phys. Chem. A 117, 1001–1010 (2013). (Peter Armentrout Festschrift)  DOI: 10.1021/jp301679m.
  69. M. A. Duncan, "Infrared laser spectroscopy of mass-selected carbocations," J. Phys. Chem. A 116, 11477–11491 (2012) (invited Feature Article).  DOI: 10.1021/jp309037d.
  70. T. C. Cheng, L. Jiang, K. R. Asmis, Y. Wang, J. M. Bowman, A. M. Ricks, M. A. Duncan, "Mid- and Far-IR spectra of H5+ and D5+ compared to the predictions of anharmonic theory," J. Phys. Chem. Lett. 3, 3160–3166 (2012).  DOI: 10.1021/jz301276f.
  71. J. D. Moseley, T. C. Cheng, A. B. McCoy, M. A. Duncan, "Infrared spectroscopy of the mass 31 cation: Protonated formaldehyde vs methoxy," J. Phys. Chem. A 116, 9287–9294 (2012). DOI:10.1021/jp3072298.
  72. T. C. Cheng, B. Bandyopadhyay, M. A. Duncan, "Protonation in water-benzene nanoclusters: Hydronium, zundel and eigen at a hydrophobic interface," J. Am. Chem. Soc. 134, 13046−13055 (2012).  DOI:10.1021/ja3038245.
  73. T. C. Cheng, B. Bandyopadhyay, S. Wheeler, M. A. Duncan, "Vibrational spectroscopy and theory of the protonated benzene dimer and trimer," J. Phys. Chem. A 116, 2065-7073 (2012).  DOI: 10.1021/jp304091h.
  74. M. A. Duncan, "Laser vaporization cluster sources," Rev. Sci. Instrum. 83, 041101/1-19 (2012)(invited review).  DOI: 10.1063/1.3697599.  Selected for April 23, 2012 issue of Virtual Journal of Nanoscale Science & Technology, published by AIP.
  75. B. Bandyopadhyay, M. A. Duncan, "Infrared spectroscopy of V2+(H2O) complexes," Chem. Phys. Lett. 530, 10-15 (2012).  DOI: 10.1016/j.cplett.2012.01.048.
  76. R. Garza-Galindo, M. Castro, M. A. Duncan, "Theoretical study of nascent hydration in the Fe+(H2O)n system," J. Phys. Chem. A 116, 1906-1913 (2012).  DOI: 10.1021/jp2117533l.
  77. J. D. Mosley, T. C. Cheng, S. Hasbrouck, A. M. Ricks, M. A. Duncan, "Electronic spectroscopy of Co+-Ne via mass-selected photodissociation," J. Chem. Phys. 135, 104309/1-6 (2011).  DOI: 10.1063/1.3633472.
  78. A. D. Brathwaite, Z. D. Reed, M. A. Duncan, "Infrared spectroscopy of copper carbonyl cations," J. Phys. Chem. A 115, 10461-10469 (2011).  DOI: 10/1021/jp206102z.
  79. A. M. Ricks, L. Gagliardi, M. A. Duncan, "Oxides and superoxides of uranium detected by IR spectroscopy in the gas phase," J. Phys. Chem. Lett. 2, 1662-1666 (2011).  DOI: 10.1021/jz2006868.
  80. B. Bandyopadhyay, P. D. Carnegie, M. A. Duncan, "Infrared spectroscopy of Mn+(H2O)n and Mn2+(H2O) complexes via argon complex predissociation," J. Phys. Chem. A 115, 7602-7609 (2011). DOI: 10.1021/jp203501n.
  81. A. M. Ricks, Z. E. Reed, M. A. Duncan, "IR spectroscopy of gas phase metal carbonyl cations," J. Mol. Spec. 266, 63-74 (2011) (invited feature article; cover art).  DOI:10.1016/j.jms.2011.03.006.
  82. S. Ard, C. Dibble, S. T. Akin, M. A. Duncan, "Ligand-coated vanadium oxide nanoclusters: Capturing gas phase magic numbers in solution," J. Phys. Chem. C 115, 6438-6447 (2011).  DOI: 10.1021/jp200691k.
  83. P. D. Carnegie, B. Bandyopadhyay, M. A. Duncan, "Infrared spectroscopy of Sc+(H2O) and Sc2+(H2O) via argon complex predissociation:  The charge dependence of cation hydration," J. Chem. Phys. 134, 014302/1-9 (2011).  DOI: 10.1063/1.3515425.
  84. A. M. Ricks, L. Gagliardi, M. A. Duncan, "Infrared spectroscopy of extreme coordination: The carbonyls of U+ and UO2+," J. Am. Chem. Soc. 132, 15905-15907 (2010).  DOI: 10.1021/ja1077365.
  85. B. Bandyopadhyay, T. C. Cheng, M. A. Duncan, "Proton sharing in hydronium-nitrogen clusters probed with infrared spectroscopy," Int. J. Mass Spectrom. 297, 124-130 (2010). DOI: 10.1016/j.ijms.2010.07.010.
  86. G. E. Douberly, R. S. Walters, J. Cai, K. D. Jordan, M. A. Duncan, "Infrared spectroscopy of small protonated water clusters H+(H2O)n (n=2-5): Isomers, argon tagging and deuteration," J. Phys. Chem. A 114, 4570-4579 (2010). DOI: 10.1021/jp100778s.
  87. T. C. Cheng, B. Bandyopadhyay, Y. Wang, B. J. Braams, J. M. Bowman, M. A. Duncan, "The shared proton mode lights up the infrared spectrum of fluxional cations H5+ and D5+," J. Phys. Chem. Lett. 1, 758-762 (2010). DOI: 10.1021/jz100048v.
  88. Z. D. Reed and M. A. Duncan, "Infrared spectroscopy and structures of manganese carbonyl cations, Mn(CO)n+ (n=1-9)," J. Am. Soc. Mass Spectrom. 21, 739-749 (2010). DOI: 10.1016/j.jasms.2010.01.022.
  89. A. M. Ricks, G. E. Douberly, P. v. R. Schleyer and M. A. Duncan, "The infrared spectrum of gas phase C3H3+: The cyclopropenyl and propargyl cations," J. Chem. Phys. 132, 051101/1-4 (2010). DOI: 10.1063/1.3298881.
  90. O. Kostko, S. R. Leone, M. A. Duncan, M. Ahmed, "Determination of ionization energies of small silicon clusters: Vacuum ultraviolet (VUV) photoionization experiments and ab initio calculations," J. Phys. Chem. A 114, 3176-3181 (2010). DOI: 10.1021/jp9091688.
  91. A. M. Ricks, G. E. Douberly, P. v. R. Schleyer and M. A. Duncan, "Infrared spectroscopy of protonated ethylene: The nature of proton binding in the non-classical structure," Chem. Phys. Lett. 480, 17-20 (2009). DOI: 10.1016/j.cplett.2009.08.063.
  92. A. M. Ricks, G. E. Douberly and M. A. Duncan, "Infrared spectroscopy of the protonated nitrogen dimer: Complex vibrational dynamics of the shared proton," J. Chem. Phys. 131, 104312-1 to 104312-8 (2009). DOI: 10.1063/1.3224155.
  93. A. M. Ricks, G. E. Douberly and M. A. Duncan, "The infrared spectroscopy of protonated naphthalene and its relevance for the unidentified infrared bands," Astrophys. J. 702, 301-306 (2009). DOI: 10.1088/0004-637X/702/1/301.
  94. G. E. Douberly, A. M. Ricks and M. A. Duncan, "Infrared spectroscopy of perdeuterated protonated water clusters in the vicinity of the clathrate cage structure," J. Phys. Chem. A 113, 8449-8453 (2009) (letter). DOI: 10.1021/jp9052709.
  95. A. M. Ricks, Z. D. Reed and M. A. Duncan, "Seven-coordinate homoleptic metal carbonyls in the gas phase," J. Am. Chem. Soc. 131, 9176-9177 (2009). DOI: 10.1021/ja903983u.
  96. A. M. Ricks, G. E. Douberly and M. A. Duncan, "IR photodissociation spectroscopy of O4+, O6+ and O8+ cluster ions," Int. J. Mass Spectrom. 283, 69-76 (2009). DOI: 10.1016/j.ijms.2009.01.009.
  97. P. D. Carnegie, A. B. McCoy and M. A. Duncan, "Infrared spectroscopy and theory of Cu+(H2O)Ar2 and Cu+(D2O)Ar2: Fundamentals and combination bands," J. Phys. Chem. A 113, 4849-4854 (2009). DOI: 10.1021/jp901231q.
  98. A. M. Ricks, J. M. Bakker, G. E. Douberly and M. A. Duncan, "IR spectroscopy of Co+(CO)n complexes in the gas phase," J. Phys. Chem. A 113, 4701-4708 (2009). DOI: 10.1021/jp900239u.
  99. P. D. Carnegie, B. Bandyopadhyay and M. A. Duncan, "Infrared spectroscopy of Cr+(H2O) and Cr2+(H2O): The role of charge in cation hydration," J. Phys. Chem. A 112, 6237-6243 (2008). DOI: 10.1021/jp803086v.
  100. Z. D.  Reed and M. A. Duncan, "Photodissociation of yttrium and lanthanum oxide cluster cations," J. Phys. Chem. A 112, 5354-5362 (2008). DOI: 10.1021/jp800588r .
  101. G. E. Douberly, A. M. Ricks, B. W. Ticknor, P. v. R. Schleyer and M. A. Duncan, "Infrared spectroscopy of gas phase benzenium ions: Protonated benzene and protonated toluene from 750 to 3400 cm-1," J. Phys. Chem. A 112, 4869-4874 (2008). DOI: 10.1021/jp802020n
  102. M. A. Duncan, "Structures, energetics and spectroscopy of gas phase transition metal ion-benzene complexes," Int. J. Mass Spectrom. 272, 99-118 (2008). DOI: 10.1016/j.ijms.2008.01.010.
  103. G. E. Douberly, A. M. Ricks, B. W. Ticknor, W. C. McKee, P. v. R. Schleyer and M. A. Duncan, "Infrared photodissociation spectroscopy of protonated acetylene and its clusters," J. Phys. Chem. A 112, 1897-1906 (2008). DOI: 10.1021/jp710808e.
  104. G. E. Douberly, A. M. Ricks, B. W. Ticknor and M. A. Duncan, "The structure of protonated carbon dioxide clusters: Infrared photodissociation spectroscopy and ab initio calculations," J. Phys. Chem. A 112, 950-959 (2008). DOI: 10.1021/jp7098587.
  105. G. E. Douberly, A. M. Ricks, P. v. R. Schleyer and M. A. Duncan, "Infrared spectroscopy of gas phase C3H5+: The allyl and 2-propenyl cations," J. Chem. Phys. 128, 021102-1 to 021102-4 (2008).  DOI: 10.1063/1.2828553.
  106. G. E. Douberly, A. M. Ricks, B. W. Ticknor and M. A. Duncan, "Infrared spectroscopy of protonated acetone and its dimer," Phys. Chem. Chem. Phys. 10, 77-79 (2008). DOI: 10.1039/b716165d.
  107. G. E. Douberly, A. M. Ricks, B. W. Ticknor, P. v. R. Schleyer and M. A. Duncan, "The infrared spectrum of the tert-butyl cation in the gas phase," J. Am. Chem. Soc. 129, 13782-13783 (2007). DOI: 10.1021/ja0753593.
  108. A. C. Scott, J. W. Buchanan, N. D. Flynn, M. A. Duncan, "Photodissociation of iron-pyrene and iron-perylene cation complexes," Int. J. Mass Spectrom. 266, 149-155 (2007). DOI: 10.1016/j.ijms.2007.07.009.
  109. L. Belau, S. E. Wheeler, B. W. Ticknor, M. Ahmed, S. R. Leone, W. D. Allen, H. F. Schaefer and M. A. Duncan, "Ionization thresholds of small carbon clusters: Tunable VUV experiments and theory," J. Am. Chem. Soc. 129, 10229-10243 (2007).  DOI: 10.1021/ja072526q.
  110. E. D. Pillai, T. D. Jaeger and M. A. Duncan, "Infrared spectroscopy of Nb+(N2)n complexes: Coordination, structures and spin states," J. Am. Chem. Soc. 129, 2297-2307 (2007). DOI: 10.1021/ja0661008.
  111. T. J. Manning, K. Olsen, L. Hardin, J. Purcell, T. M. Ayers, M. A. Duncan and D. Phillips, "Extensive ozonation of C60: Degradation or polymerization?," Ozone Sci. & Eng. 28, 177-180 (2006). DOI: 10.1080/01919510600686741.
  112. J. B. Jaeger, T. D Jaeger and M. A. Duncan, "Photodissociation of metal-silicon clusters: encapsulated versus surface-bound metal," J. Phys. Chem. A 110, 9310-9314 (2006). DOI: 10.1021/jp0629947.
  113. T. D. Vaden, J. M. Lisy, P. D. Carnegie, E. D. Pillai and M. A. Duncan, "Infrared spectroscopy of the Li+(H2O)Ar Complex: The role of internal energy and its dependence on ion preparation," Phys. Chem. Chem. Phys. 8, 3078-3082 (2006). DOI: 10.1039/b605442k.
  114. J. Velasquez, E. D. Pillai, P. D. Carnegie and M. A. Duncan, "IR spectroscopy of M+(acetone) complexes (M=Mg, Al, Ca): Cation-carbonyl binding interactions," J. Phys. Chem. A 110, 2325-2330 (2006). DOI: 10.1021/jp0574899.
  115. N. R. Walker, R. S. Walters and M. A. Duncan, "Frontiers in the infrared spectroscopy of gas phase metal ion complexes," New J.  Chem. 29, 1495-1503 (2005). DOI: 10.1039/b510678h.
  116. R. S. Walters, E. D. Pillai, P. v. R. Schleyer and M. A. Duncan, "Vibrational spectroscopy of Ni+(C2H2)n (n=1-4) complexes," J. Am. Chem. Soc. 127, 17030-17042 (2005). DOI: 10.1021/ja054800r.
  117. R. S. Walters, E. D. Pillai and M. A. Duncan, "Solvation dynamics in Ni+(H2O)n complexes probed with infrared photodissociation spectroscopy," J. Am. Chem. Soc. 127, 16599-16610 (2005). DOI: 10.1021/ja0542587.
  118. K. S. Molek, T. D. Jaeger and M. A. Duncan, "Photodissociation of vanadium, niobium and tantalum oxide cluster cations," J. Chem. Phys. 123, 144313-1 to 144313-10 (2005). DOI: 10.1063/1.2050650.
  119. T. M. Ayers, B. C. Westlake, D. V. Preda, L. T. Scott and M. A. Duncan, "Laser plasma production of metal-corannulene ion-molecule complexes," Organometallics 24, 4573-4578 (2005). DOI: 10.1021/om050267c.
  120. N. R. Walker, R. S. Walters, C.-S. Tasi, K. D. Jordan and M. A. Duncan, "Infrared photodissociation spectroscopy of Mg+(H2O)Arn complexes: Isomers in progressive microsolvation," J. Phys. Chem. A 109, 7057-7067 (2005). DOI: 10.1021/jp051877t.
  121. K. Olsen. L. Hardin, J. McGovern, T. Manning, D. Phillips, T. M. Ayers and M. A. Duncan, "Nanoresistors and single-walled carbon nanotubes: Using an ohmmeter to test for hybridization shifts," Chem. Educator 10/4, 260 (2005).
  122. J. Headrick, E. G. Diken, R. S. Walters, N. I. Hammer, R. A. Christie, J. Cui, E. M. Myshakin, M. A. Duncan, M. A. Johnson and K. D. Jordan, "Spectral signatures of hydrated proton vibrations in water clusters," Science 308, 1765-1769 (2005). DOI: 10.1126/science.1113094.
  123. E. D. Pillai, T. D. Jaeger and M. A. Duncan, "Infrared spectroscopy and density functional theory of small V+(N2)n clusters," J. Phys. Chem. A 109, 3521-3526 (2005). DOI: 10.1021/jp050294g.
  124. T. D. Jaeger and M. A. Duncan, "Infrared photodissociation spectroscopy of Ni+(benzene)x complexes," J. Phys. Chem. A 109, 3311-3317 (2005). DOI: 10.1021/jp044639r.
  125. B. W. Ticknor and M. A. Duncan, "Photodissociation of size-selected silicon carbide cluster cations," Chem. Phys. Lett. 405, 214-219 (2005). DOI: 10.1016/j.cplett.2005.02.046.
  126. E. D. Pillai, K. S. Molek and M. A. Duncan, "Growth and photodissociation of U+(C6H6)n (n=1-3) and UOm+(C6H6) (m=1,2) complexes," Chem. Phys. Lett. 405, 247-251 (2005). DOI: 10.1016/j.cplett.2005.02.038.
  127. J. B. Jaeger, E. D. Pillai, T. D. Jaeger and M. A. Duncan, "Ultraviolet and infrared photodissociation of Si+(C6H6)n and Si+(C6H6)Ar clusters," J. Phys. Chem. A 109, 2801-2808 (2005). DOI: 10.1021/jp044798a.
  128. T. D. Jaeger and M. A. Duncan, "Photodissociation of M+(benzene)x complexes (M=Ti, V, Ni) at 355 nm," Intl. J. Mass Spectrom. 241, 165-171 (2005). DOI: 10.1016/j.ijms.2004.12.011.
  129. R. S. Walters, P. v. R. Schleyer, C. Corminboeuf and M. A. Duncan, "Structural trends in transition metal cation-acetylene complexes revealed through the C-H stretch fundamentals," J. Am. Chem. Soc. 127, 1100-1101 (2005). DOI: 10.1021/ja043766y.
  130. T. D. Jaeger and M. A. Duncan, "Photodissociation processes in transition metal cation complexes with cyclooctatetraene," J. Phys. Chem. A 108, 11296-11301 (2004). DOI: 10.1021/jp0462557.
  131. N. R. Walker, G. A. Grieves, R. S. Walters and M. A. Duncan, "Growth dynamics and  intracluster reactions in Ni+(CO2)n complexes via infrared spectroscopy," J. Chem. Phys. 121, 10498-10507 (2004). DOI: 10.1063/1.1806821.
  132. T. D. Jaeger, E. D. Pillai and M. A. Duncan, "Structure, coordination and solvation in V+(benzene)n complexes via gas phase infrared spectroscopy," J. Phys. Chem. A 108, 6605-6610 (2004). DOI: 10.1021/jp047522b.
  133. T. M. Ayers, B. C. Westlake and M. A. Duncan, "Laser plasma production of metal and metal-compound complexes with PAH’s," J. Phys. Chem. A 108, 9805-9813 (2004). DOI: 10.1021/jp0480753.
  134. R. S. Walters and M. A. Duncan, "Infrared spectroscopy of solvation and isomers in Fe+(H2O)1,2Arm complexes," Austr. J. Chem. 57, 1145-1148 (2004). DOI: 10.1071/CH04118.
  135. T. D. Jaeger, D. van Heijnsbergen, S. Klippenstein, G. von Helden, G. Meijer and M. A. Duncan, "Infrared spectroscopy and density functional theory of transition metal ion-benzene and dibenzene complexes," J. Am. Chem. Soc. 126, 10981-10991 (2004). DOI: 10.1021/ja0477165.
  136. T. D. Jaeger, A. Fielicke, G. von Helden, G. Meijer and M. A. Duncan, "Infrared spectroscopy of water adsorption on vanadium cluster cations (Vx+; x=3-15)," Chem. Phys. Lett. 392, 409-414 (2004). DOI: 10.1016/j.cplett.2004.05.057.
  137. J. B. Jaeger, T. D. Jaeger, N. R. Brinkmann, H. F. Schaefer and M. A. Duncan, "Infrared photodissociation spectroscopy of Si+(CO2)n and Si+(CO2)nAr complexes," Can. J. Chem. 82, 934-946 (2004). DOI: 10.1139/V04-044.
  138. J.-W. Shin, N. I. Hammer, E. G. Diken, M. A. Johnson, R. S. Walters, T. D. Jaeger, M. A. Duncan, R. A. Christie and K. D. Jordan, "Infrared signature of structural motifs associated with the H+(H2O)n, n=6-27, clusters," Science 304, 1137-1140 (2004). DOI: 10.1126/science.1096466.
  139. N. R. Walker, R. S. Walters and M. A. Duncan, "Infrared photodissociation spectroscopy of V+(CO2)n and V+(CO2)n­Ar complexes," J. Chem. Phys. 120, 10037-10045 (2004). DOI: 10.1063/1.1730217.
  140. R. S. Walters, N. R. Walker, E. D. Pillai and M. A. Duncan, "Infrared spectroscopy of V+(H2O) and V+(D2O) complexes: Ligand deformation and an incipient reaction," J. Chem. Phys. 119, 10471-10474 (2003). DOI: 10.1063/1.1625370.
  141. N. R. Walker, G. A. Grieves, R. S. Walters and M. A. Duncan, "The metal coordination in Ni+(CO2)n and NiO2+(CO2)m complexes," Chem. Phys. Lett. 380, 230-236 (2003). DOI: 10.1016/j.cplett.2003.08.107.
  142. R. S. Walters, T. D. Jaeger, N. R. Brinkman, H. F. Schaefer and M. A. Duncan, "Infrared photodissociation spectroscopy of Al+(CO2)n and Al+(CO2)nArm complexes,"  J. Phys. Chem. A 107, 7396-7405 (2003). DOI: 10.1021/jp030491k.
  143. N. R. Walker, G. A. Grieves and M. A. Duncan, "Production of "unstable" doubly charged metal ion complexes with a laser vaporization cluster source, " Intl. J. Mass Spectrom. 228, 285-295 (2003). DOI: 10.1016/S1387-3806(03)00215-X.
  144. T. M. Ayers, J. L. Fye, Q. Li and M. A. Duncan, "Synthesis and isolation of titanium metal cluster complexes and ligand-coated nanoparticles with a laser vaporization flowtube reactor," J. Clus. Sci. 14, 97-113 (2003). DOI: 10.1023/A:1024885403308.
  145. D. van Heijnsbergen, K. Demyk, M. A. Duncan, G. Meijer and G. von Helden, "Structure determination of aluminum oxide clusters," Phys. Chem. Chem. Phys. 5, 2515-2519 (2003). DOI: 10.1039/b212654k.
  146. M. A. Duncan "Infrared spectroscopy to probe structure and dynamics in metal ion-molecule complexes," Intl. Rev. Phys. Chem. 22, 407-435 (2003). DOI: 10.1080/0144235031000095201.
  147. G. Gregoire, N. R. Brinkman, H. F. Schaefer and M. A. Duncan, "Infrared photodissociation spectroscopy of Mg+(CO2)n and Mg+(CO2)nArm complexes,"  J. Phys. Chem. A 107, 218-227 (2003). DOI: 10.1021/jp026373z.
  148. R. S. Walters, T. D. Jaeger and M. A. Duncan, "Infrared spectroscopy of Ni+(C2H2)n complexes: Evidence for intracluster cyclization reactions,"  J. Phys. Chem. A 106, 10482-10487 (2002). DOI: 10.1021/jp026506g.
  149. D. van Heijnsbergen, T. D. Jaeger, G. von Helden, G. Meijer and M. A. Duncan, "Infrared spectroscopy of Al+(benzene) in the gas phase," Chem. Phys. Lett. 364, 345-351 (2002). DOI: 10.1016/S0009-2614(02)01341-6.
  150. G. Gregoire and M. A. Duncan, "Infrared spectroscopy to probe structure and growth dynamics in Fe+(CO2)n complexes," J. Chem. Phys. 117, 2120-2130 (2002). DOI: 10.1063/1.1490600.
  151. D. van Heijnsbergen, G. von Helden, G. Meijer, P. Maitre and M. A. Duncan, "Infrared spectroscopy of V+(benzene) and V+(benzene)2 complexes in the gas phase," J. Am. Chem. Soc. 124, 1562-1563 (2002). DOI: 10.1021/ja0175340.
  152. D. van Heijnsbergen, G. von Helden, G. Meijer, P. Maitre and M. A. Duncan, "Infrared spectroscopy of V+(benzene) and V+(benzene)2 complexes in the gas phase," J. Am. Chem. Soc. 124, 1562-1563 (2002). DOI: 10.1021/ja0175340.
  153. G. Gregoire, J. Velasquez and M. A. Duncan, "Infrared photodissociation spectroscopy of small Fe+(CO2)n and Fe+(CO2)nArm complexes," Chem. Phys. Lett. 349, 451-457 (2001). DOI: 10.1016./S0009-2614(01)01247-7.
  154. D. van Heijnsbergen, M. A. Duncan, G. Meijer and G. von Helden, "Infrared spectroscopy of the Ti8C12 "met-car" cation," Chem. Phys. Lett. 349, 220-226 (2001). DOI: 10.1016/S0009-2614(01)01230-1.
  155. M. A. Duncan, A. M. Knight, Y. Negeshi, S. Nagoa, K. Judai, A. Nakajima and K. Kaya, "Photoelectron spectroscopy of Vx(Coronene)y and Tix(Coronene)y anions" J. Phys. Chem. A 105, 10093-10097 (2001). DOI: 10.1021/jp0122676.
  156. N. R. Foster, J. W. Buchanan, N. D. Flynn and M. A. Duncan, "Ring destruction and carbide formation in niobium-PAH complexes," Chem. Phys. Lett. 341, 476-482 (2001). DOI: 10.1016/S0009-2614(01)00488-2.
  157. G. A. Grieves, J. W. Buchanan, J. E. Reddic and M. A. Duncan, "Photodissociation of exohedral transition metal-C60 complexes," Intl. J. Mass Spectrom. 204, 223-232 (2001). DOI: 10.1016/S1387-3806(00)00362-6.
  158. G. von Helden, D. van Heijnsbergen, M. A. Duncan, A. J. A. van Roij and G. Meijer, "IR-REMPI of vanadium carbide nanocrystals: Ideal versus truncated lattices," Chem. Phys. Lett. 333, 350-357 (2001). DOI: 10.1016/S0009-2614(00)01301-4.
  159. M. A. Duncan, "Frontiers in the spectroscopy of mass-selected molecular Ions," Intl. J. of Mass Spectrom. 200, 545-569 (2000). DOI: 10.1016/S1387-3806(00)00366-3.
  160. N. R. Foster, G. A. Grieves, J. W. Buchanan, N. D. Flynn and M. A. Duncan, "Growth and photodissociation Crx-(Coronene)y complexes," J. Phys. Chem. A 104, 11055-11062 (2000). DOI: 10.1021/jp002131s.
  161. S. S. Weslowski, R. A. King, H. F. Schaefer and M. A. Duncan, "Coupled cluster electronic spectra of Ca+-acetylene p complex and comparisons to its alkaline earth analogs," J. Chem. Phys. 113, 701-706 (2000). DOI: 10.1063/1.481845.
  162. G. von Helden, A. G. G. M. Tielens, D. van Heijnsbergen, M. A. Duncan, S. Hony, L. B. F. M. Waters and G. Meijer, "Titanium carbide nanocrystals in circumstellar environments," Science 288, 313-316 (2000).
  163. J. E. Reddic and M. A. Duncan, "Photodissociation spectroscopy of Ca+-Ne," J. Chem. Phys. 112, 4974-4982 (2000). DOI: 10.1063/1.481052.

  164. D. van Heijnsbergen, G. von Helden, M. A. Duncan, A. J. A. van Roij and G. Meijer, "Vibrational spectroscopy of gas phase metal carbide clusters and nanocrystals," Phys. Rev. Lett. 83, 4983-4983 (1999).