Disentangling Electronic Spectra of Linear and Cyclic Hydrogenated Carbon Cluster Cations, C2 n 1H (n = 3-10)

SJP Marlton; JT Buntine; C Liu; P Watkins; U Jacovella; E Carrascosa; JN Bull; EJ Bieske

Journal article

Disentangling Electronic Spectra of Linear and Cyclic Hydrogenated Carbon Cluster Cations, C2 n 1H (n = 3-10)

SJP Marlton, JT Buntine, C Liu, P Watkins, U Jacovella, E Carrascosa, JN Bull, EJ Bieske

Journal of Physical Chemistry A | AMER CHEMICAL SOC | Published : 2022

DOI: 10.1021/acs.jpca.2c05051

Abstract

Electronic spectra are measured for protonated carbon clusters (C2n+1H+) containing between 7 and 21 carbon atoms. Linear and cyclic C2n+1H+isomers are separated and selected using a drift tube ion mobility stage before being mass selected and introduced into a cryogenically cooled ion trap. Spectra are measured using a two-color resonance-enhanced photodissociation strategy, monitoring C2n+1+photofragments (H atom loss channel) as a function of excitation wavelength. The linear C7H+, C9H+, C11H+, C13H+, C15H+, and C17H+clusters, which are predicted to have polyynic structures, possess sharp 11ς+X1ς+transitions with well-resolved vibronic progressions in C-C stretch vibrational modes. The vi..

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University of Melbourne Researchers

Evan Bieske Author

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Grants

Awarded by Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Funding Acknowledgements

This research was supported under the Australian Research Council's Discovery Project funding scheme (project numbers DP150101427 and DP160100474) . U.J. and J.T.B. acknowl-edge support from the Swiss National Science Foundation (P2EZP2_178429) and the Australian Research Training Program scheme, respectively. The authors thank Richard Mathys of the Science Faculty Workshop for his indispensable contributions to the design and construction of the apparatus used in this study.