Add time:07/22/2019         Source:sciencedirect.com

New dialkylamino groups-comprising diarylethenes of 2,3-diarylcyclopent-2-en-1-one (DCP) series have been synthesized and its photochromic, fluorescent as well as acidochromic features have been investigated. It was shown that photochromic properties of the substances depend strong on their structures; the non-symmetry of the photochromic molecule is a powerful tool to properly control and tune the parameters of diarylethenes. It has been found that the most promising of DCPs synthesized are those containing dialkylamino groups in ethene “bridge” (rather than in aryl moieties) because they possess photo- and pH-switchable emission along with thermal stability. It has been established that the introduction at the second position of the cyclopentenone ring the benzene residue leads to the disappearance of the photochromic properties.

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