The synthesis, absorption, fluorescence and photoisomerisation of 2-aryl-4-arylmethylidene-pyrroline-5-ones.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F08%3A00007956" target="_blank" >RIV/00216275:25310/08:00007956 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
The synthesis, absorption, fluorescence and photoisomerisation of 2-aryl-4-arylmethylidene-pyrroline-5-ones.
Original language description
Base catalyzed ClaiseneSchmidt type condensation of ethyl-4,5-dihydro-5-oxo-2-phenyl(1H)pyrrole-3-carboxylate and its 2-biphenylyl analogue with various aldehydes was studied. The absorption and fluorescence spectra of ethyl-4,5-dihydro-5-oxo-2-aryl-4-(arylmethylidene)-(1H)pyrrole-3-carboxylate at both room (300 K) and low (77 K) temperatures were analyzed. EeZ photoisomerisation was observed for all derivatives; the Z-isomer was confirmed as being thermodynamically stable by NMR spectroscopy. PM3 quantum chemical Metod was used for ground state geometry calculations of the Z-isomers, while INDO/S calculations enabled interpretation of the absorption spectral shifts. Photoisomerisation forms the main deactivation channel after excitation in fluid solution, in contrast to rigid frozen glass, where fluorescence is preferred.
Czech name
Syntéza, absorpce, fluorescence a fotoisomerisace 2-aryl-4-arylmethyliden-pyrrolin-5-onů.
Czech description
Syntéza, absorpce, fluorescence a fotoisomerisace 2-aryl-4-arylmethyliden-pyrrolin-5-onů.

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
—

Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)