Henley, A;
Patel, AM;
Parkes, MA;
Anderson, JC;
Fielding, HH;
(2018)
The Role of Photoisomerisation on the Photodetachment of the Photoactive Yellow Protein Chromophore.
Journal of Physical Chemistry A
10.1021/acs.jpca.8b07770.
(In press).
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Abstract
The photocycle of photoactive yellow protein (PYP) is initiated by a photoinduced trans-cis isomerisation around a C=C bond in the chromophore that lies at the heart of the protein; however, in addition to the desired photochemical pathway, the chromophore can undergo competing electronic relaxation processes. Here, we combine gas-phase anion photoelectron spectroscopy and quantum chemistry calculations to investigate how locking the C=C bond in the chromophore controls the competition between these electronic relaxation processes following photoexcitation in the range 400-310 nm. We find evidence to suggest that preventing trans-cis isomerisation effectively turns off internal conversion to the ground electronic state and enhances electron emission from the first electronically excited state.
| Type: | Article |
|---|---|
| Title: | The Role of Photoisomerisation on the Photodetachment of the Photoactive Yellow Protein Chromophore |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.jpca.8b07770 |
| Publisher version: | http://dx.doi.org/10.1021/acs.jpca.8b07770 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10057366 |
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