Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 16, Issue 44, Pages 13199-13209Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201001319
Keywords
dithienylethene; imidazolium; nucleophilic; addition photochromism; solvatochromism
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Funding
- University of Hong Kong
- URC Strategic Research Theme on Molecular Materials
- Research Grants Council of Hong Kong Special Administrative Region PR China [HKU 7057/06P]
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A series of dithienylethene containing imidazolium salts with various substituents on the 2-position of the imidazolium ring has been synthesized The photochromic properties of these compounds have been studied, and the closed forms are found to be solvatochromic due to the donor-acceptor interaction with the solvent molecules The closed form of the imidazo hum salt shows a much higher affinity towards nucleophiles over the open form of the salt A reaction pathway has been proposed to account for this reactivity difference based on the structure-property relationship, and the possible structure of the reaction product is discussed
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