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Optomechanical Control of Quantum Yield in Trans-Cis Ultrafast Photoisomerization of a Retinal Chromophore Model
Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain.;Univ Siena, Dept Biotechnol Chem & Pharm, Via A Moro 2, I-53100 Siena, Italy..
Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain..
Univ Alcala De Henares, Dept Analyt Chem Phys Chem & Chem Engn, Ctra A2 Km 33,6, Alcala De Henares 28871, Spain.;Univ La Rioja, CISQ, Dept Quim, Madre Dios 53, Logrono 26006, Spain..
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2017 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 56, no 14, 3842-3846 p.Article in journal (Refereed) Published
Abstract [en]

The quantum yield of a photochemical reaction is one of the most fundamental quantities in photochemistry, as it measures the efficiency of the transduction of light energy into chemical energy. Nature has evolved photoreceptors in which the reactivity of a chromophore is enhanced by its molecular environment to achieve high quantum yields. The retinal chromophore sterically constrained inside rhodopsin proteins represents an outstanding example of such a control. In a more general framework, mechanical forces acting on a molecular system can strongly modify its reactivity. Herein, we show that the exertion of tensile forces on a simplified retinal chromophore model provokes a substantial and regular increase in the trans-to-cis photoisomerization quantum yield in a counter-intuitive way, as these extension forces facilitate the formation of the more compressed cis photoisomer. A rationale for the mechanochemical effect on this photoisomerization mechanism is also proposed.

Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2017. Vol. 56, no 14, 3842-3846 p.
Keyword [en]
mechanochemistry, photoisomerization, quantum yield control, retinal models, semiclassical dynamics
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-320042DOI: 10.1002/anie.201611265ISI: 000397346200009PubMedID: 28251753OAI: oai:DiVA.org:uu-320042DiVA: diva2:1088561
Available from: 2017-04-13 Created: 2017-04-13 Last updated: 2017-04-13Bibliographically approved

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