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Issue 20, 2017
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Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis

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Abstract

Michaelis Menten catalysis by a T-photochromic system has been analyzed numerically. Using an appropriate set of rate constants and quantum yields, we have evidenced an enhanced photo-responsiveness at a medium light intensity: the plot of the initial rate vs. light intensity is bell-shaped. This emergent phenomenon can be qualified as hormetic catalysis. The analysis of the chemical flows shows that a directional rotation occurs within the cyclic scheme. Non equilibrium conditions are provided by two independent sources: the chemical energy dissipation from the irreversible exergonic reaction and the steady transformation of light into heat by T-photochromism. A literature survey, showing that most of the required kinetic features are not so rare, let us anticipate its practical feasibility.

Graphical abstract: Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis

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Supplementary files

Article information


Submitted
07 Mar 2017
Accepted
14 Apr 2017
First published
19 Apr 2017

Phys. Chem. Chem. Phys., 2017,19, 12890-12897
Article type
Paper

Enhanced photo-responsiveness in a photoswitchable system model: emergent hormetic catalysis

J.-C. Micheau and C. Coudret, Phys. Chem. Chem. Phys., 2017, 19, 12890
DOI: 10.1039/C7CP01470H

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