Journal article

Photophysics and spectroscopy of 1,2-Benzazulene

Stephen Awuku, Siobhan J Bradley, Kenneth P Ghiggino, Ronald P Steer, Amy L Stevens, Jonathan M White, Colleen Yeow

CHEMICAL PHYSICS LETTERS | ELSEVIER | Published : 2021

Abstract

The electronic spectroscopy and photophysics of 1,2-benzazulene (BzAz) have been examined in solution and in thin solid films, with the objective of comparing its intramolecular and intermolecular excited state decay processes with those of azulene. Unlike azulene, the S2 – S0 absorption and fluorescence spectra exhibit a clear mirror image relationship dominated by a single strong Franck-Condon active progression. Picosecond transient absorption spectra and non-linear S2 fluorescence upconversion experiments reveal lifetimes that follow a well-established energy gap law correlation, indicative of a dominant S2 – S1 decay route. Mechanistic interpretations, including the possibility of S2 si..

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Grants

Awarded by Australian Research Council Centre of Excellence in Exciton Science


Funding Acknowledgements

The authors thank the Natural Sciences and Engineering ResearchCouncil of Canada and the Australian Research Council Centre of Excellence in Exciton Science (CE170100026) for their continuing financial support. The Saskatchewan Structural Science Centre provided equipment and technical assistance. Thanks to George Belev.