Issue 45, 2018

Intrinsic photophysics of nitrophenolate ions studied by cryogenic ion spectroscopy

Abstract

The intrinsic photophysics of nitrophenolate isomers (meta, para, and ortho) was studied at low temperature using photodissociation mass spectrometry in a cryogenic ion trap instrument. Each isomer has distinct photophysics that affects the excited state lifetimes, as observed experimentally in their spectroscopic linewidths. Visible-light-induced excitation of m-nitrophenolate gives rise to well-resolved vibronic features in the spectrum of the S1 state. The para and ortho isomers have broad spectra – even at cryogenic temperatures – due to their shorter excited state lifetimes and spectral congestion. We present computational evidence for mixing of the first and second excited states of o-nitrophenolate, leading to significant additional broadening in the experimental spectrum.

Graphical abstract: Intrinsic photophysics of nitrophenolate ions studied by cryogenic ion spectroscopy

Supplementary files

Article information

Article type
Paper
Submitted
27 Sep 2018
Accepted
30 Oct 2018
First published
30 Oct 2018

Phys. Chem. Chem. Phys., 2018,20, 28535-28543

Author version available

Intrinsic photophysics of nitrophenolate ions studied by cryogenic ion spectroscopy

L. G. Dodson, W. Zagorec-Marks, S. Xu, J. E. T. Smith and J. M. Weber, Phys. Chem. Chem. Phys., 2018, 20, 28535 DOI: 10.1039/C8CP06078A

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