| Dependence of photochemical reactivity of the all-trans retinal protonated Schiff base on the solvent and the excitation wavelength. | |
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MedLine Citation:
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PMID: 20132512 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An all-optical experimental technique aimed at measuring photoisomerization quantum yield (phi) of the all-trans protonated Schiff base of retinal in solution has been implemented. Upon the increase in the excitation wavelength from 400 to 540 nm a slight increase in phi from 0.16 +/- 0.03 to 0.20 +/- 0.02 is observed in the chromophore dissolved in methanol, whereas the phi value of the one dissolved in acetonitrile varies only from 0.22 +/- 0.03 (400 nm) to 0.23 +/- 0.04 (540 nm). The results suggest that dissipation of the excited-state vibrational energy excess, along with environment-induced modifications of the potential energy surfaces are necessary for an efficient retinal photoisomerization in both solvent and protein environment. |
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Authors:
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Goran Zgrablić; Maria Ricci; Anna Maria Novello; Fulvio Parmigiani |
Publication Detail:
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Type: Journal Article Date: 2010-01-27 |
Journal Detail:
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Title: Photochemistry and photobiology Volume: 86 ISSN: 1751-1097 ISO Abbreviation: Photochem. Photobiol. Publication Date: 2010 May-Jun |
Date Detail:
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Created Date: 2010-06-16 Completed Date: 2010-09-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376425 Medline TA: Photochem Photobiol Country: United States |
Other Details:
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Languages: eng Pagination: 507-12 Citation Subset: IM |
Affiliation:
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T-ReX Laboratory, Sincrotrone Trieste, Basovizza Trieste, Italy. goran.zgrablic@elettra.trieste.it |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetonitriles Isomerism Light* Methanol Photochemical Processes / radiation effects* Retinaldehyde / chemistry*, radiation effects Schiff Bases / chemistry*, radiation effects Solvents / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Acetonitriles; 0/Schiff Bases; 0/Solvents; 116-31-4/Retinaldehyde; 67-56-1/Methanol; 75-05-8/acetonitrile |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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