Photochemical investigation of a photochromic diarylethene compound that can be used as a wide range actinometer

The photochromic diarylethene derivative 1,2-bis(5-(4-ethynylphenyl)-2-methylthiophen-3-yl)perfluorocyclopentene (1) was submitted to photochemical, thermal stability and fatigue resistance studies in acetonitrile, also to evaluate its possible application as a new actinometer. This photochromic sys...

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Bibliographic Details
Published in:Photochemical & photobiological sciences 2009-12, Vol.8 (12), p.1734-1742
Main Authors: Ribeiro, André, Ballardini, Roberto, Belser, Peter, Gandolfi, Maria Teresa, Iyer, Vijay Mahadevan, Moggi, Luca
Format: Article
Language:English
Subjects:
Biochemistry
Biomaterials
Chemistry
Physical Chemistry
Plant Sciences
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Summary:The photochromic diarylethene derivative 1,2-bis(5-(4-ethynylphenyl)-2-methylthiophen-3-yl)perfluorocyclopentene (1) was submitted to photochemical, thermal stability and fatigue resistance studies in acetonitrile, also to evaluate its possible application as a new actinometer. This photochromic system covers a wide spectral absorption range, with intense bands in the UV and visible regions for the open-ring and closed-ring isomers, respectively. Very high ring-closure quantum yield values were obtained, in contrast with the low ring-opening quantum yields, which are nevertheless high enough to exploit 1 as an actinometer. The procedure required to determine the photon flux of an irradiation source with this fatigue resistant compound is indeed very simple.
ISSN:1474-905X
1474-9092
DOI:10.1039/b9pp00037b