Photoinduced processes in bis(diethylaminobenzylidene)cyclohexanone and its bis(aza-18-crown-6)-containing analogue in acetonitrile

Photoinduced processes in bis(diethylaminobenzylidene)cyclohexanone (CH1) and its bis(aza-18-crown-6) derivative ( CH2 ) in acetonitrile at ambient temperature and 77 K have been studied. The absorption, fluorescence, and phosphorescence spectra of CH1 and CH2 are similar. The probability of the for...

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Bibliographic Details
Published in:High energy chemistry 2016-11, Vol.50 (6), p.442-446
Main Authors: Zakharova, G. V., Zyuz’kevich, F. S., Gutrov, V. N., Nuriev, V. N., Vatsadze, S. Z., Plotnikov, V. G., Avakyan, V. G., Gromov, S. P., Chibisov, A. K.
Format: Article
Language:English
Subjects:
Acetonitrile
Ambient temperature
Chemistry
Chemistry and Materials Science
Cyclohexanone
Fluorescence
Phosphorescence
Photonics
Physical Chemistry
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Summary:Photoinduced processes in bis(diethylaminobenzylidene)cyclohexanone (CH1) and its bis(aza-18-crown-6) derivative ( CH2 ) in acetonitrile at ambient temperature and 77 K have been studied. The absorption, fluorescence, and phosphorescence spectra of CH1 and CH2 are similar. The probability of the formation of the triplet state is higher for CH2 molecules (λ T-T max = 660 nm, lifetime τ T ~ 20 μs). The lifetime of the CH1 molecule in the triplet state is estimated at τ T ~ 2–3 μs. Photoisomers of CH1 and CH2 are formed along with the triplet state. According to DFT calculation results, the formation of trans–cis photoisomers of CH1 and CH2 is the most energetically favorable.
ISSN:0018-1439
1608-3148
DOI:10.1134/S0018143916060205