Exploring autoionization and photo-induced proton-coupled electron transfer pathways of phenol in aqueous solution

Thomas A A Oliver; Yuyuan Zhang; Anirban Roy; Michael N R Ashfold; Stephen E. Bradforth

doi:10.1021/acs.jpclett.5b01861

Exploring autoionization and photo-induced proton-coupled electron transfer pathways of phenol in aqueous solution

Thomas A A Oliver, Yuyuan Zhang, Anirban Roy, Michael N R Ashfold, Stephen E. Bradforth

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Abstract

The excited state dynamics of phenol in water have been investigated using transient absorption spectroscopy. Solvated electrons and vibrationally cold phenoxyl radicals are observed upon 200 and 267 nm excitation, but with formation time scales that differ by more than 4 orders of magnitude. The impact of these findings is assessed in terms of the relative importance of autoionization versus proton-coupled electron transfer mechanisms in this computationally tractable model system.

Original language	English
Pages (from-to)	4159-4164
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	6
Issue number	20
DOIs	https://doi.org/10.1021/acs.jpclett.5b01861
Publication status	Published - 15 Oct 2015

Bibliographical note

Date of Acceptance: 30/09/2015

Keywords

UV photochemistry
solvated electrons
proton transfer
electron transfer
nonradiative decay

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10.1021/acs.jpclett.5b01861

Phenol_JPCL_author_final_version
© 2015 American Chemical Society
Accepted author manuscript, 1.2 MBLicence: Other

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NEW HORIZONS IN CHEMICAL AND PHOTOCHEMICAL DYNAMICS
Orr-Ewing, A. J. & Ashfold, M. N. R.
1/10/08 → 1/04/14
Project: Research

Dr Tom Oliver
- tom.oliverbristol.acuk
- School of Chemistry - Proleptic Associate Professor and Royal Society University Research Fellow
- Spectroscopy and Dynamics
Person: Academic , Member

Cite this

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title = "Exploring autoionization and photo-induced proton-coupled electron transfer pathways of phenol in aqueous solution",

abstract = "The excited state dynamics of phenol in water have been investigated using transient absorption spectroscopy. Solvated electrons and vibrationally cold phenoxyl radicals are observed upon 200 and 267 nm excitation, but with formation time scales that differ by more than 4 orders of magnitude. The impact of these findings is assessed in terms of the relative importance of autoionization versus proton-coupled electron transfer mechanisms in this computationally tractable model system.",

keywords = "UV photochemistry, solvated electrons, proton transfer, electron transfer, nonradiative decay",

author = "Oliver, {Thomas A A} and Yuyuan Zhang and Anirban Roy and Ashfold, {Michael N R} and Bradforth, {Stephen E.}",

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doi = "10.1021/acs.jpclett.5b01861",

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T1 - Exploring autoionization and photo-induced proton-coupled electron transfer pathways of phenol in aqueous solution

AU - Oliver, Thomas A A

AU - Zhang, Yuyuan

AU - Roy, Anirban

AU - Ashfold, Michael N R

AU - Bradforth, Stephen E.

N1 - Date of Acceptance: 30/09/2015

PY - 2015/10/15

Y1 - 2015/10/15

N2 - The excited state dynamics of phenol in water have been investigated using transient absorption spectroscopy. Solvated electrons and vibrationally cold phenoxyl radicals are observed upon 200 and 267 nm excitation, but with formation time scales that differ by more than 4 orders of magnitude. The impact of these findings is assessed in terms of the relative importance of autoionization versus proton-coupled electron transfer mechanisms in this computationally tractable model system.

AB - The excited state dynamics of phenol in water have been investigated using transient absorption spectroscopy. Solvated electrons and vibrationally cold phenoxyl radicals are observed upon 200 and 267 nm excitation, but with formation time scales that differ by more than 4 orders of magnitude. The impact of these findings is assessed in terms of the relative importance of autoionization versus proton-coupled electron transfer mechanisms in this computationally tractable model system.

KW - UV photochemistry

KW - solvated electrons

KW - proton transfer

KW - electron transfer

KW - nonradiative decay

U2 - 10.1021/acs.jpclett.5b01861

DO - 10.1021/acs.jpclett.5b01861

M3 - Article (Academic Journal)

C2 - 26722792

VL - 6

SP - 4159

EP - 4164

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 20

ER -

Exploring autoionization and photo-induced proton-coupled electron transfer pathways of phenol in aqueous solution

Abstract

Bibliographical note

Keywords

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