Photochemical investigation of a photochromic diarylethene compound that can be used as a wide range actinometer
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Ribeiro Santos, André
Organic Chemistry Department, Complutense University, Madrid, Spain
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Ballardini, Roberto
"G. Ciamician" Department of Chemistry, University of Bologna, Italy
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Belser, Peter
Department of Chemistry, University of Fribourg, Switzerland
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Gandolfi, Maria Teresa
"G. Ciamician" Department of Chemistry, University of Bologna, Italy
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Mahadevan Iyer, Vijay
Office of Technology Transfer, Temple University, Philadelphia, USA
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Moggi, Luca
"G. Ciamician" Department of Chemistry, University of Bologna, Italy
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Published in:
- Photochemical & Photobiological Sciences. - 2009, vol. 8, p. 1734-1742
English
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.
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Faculty
- Faculté des sciences et de médecine
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Department
- Département de Chimie
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Language
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Classification
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Chemistry
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License
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License undefined
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Identifiers
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Persistent URL
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https://folia.unifr.ch/unifr/documents/301356
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