Heteroatom effect on the radiative and reactive photobehaviour of E,E-1,2-distyrylbenzene (CROSBI ID 129249)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Ciorba, Serena ; Galiazzo, Guido ; Mazzucato, Ugo ; Šindler-Kulyk, Marija ; Škorić, Irena ; Spalletti, Anna
engleski
Heteroatom effect on the radiative and reactive photobehaviour of E,E-1,2-distyrylbenzene
The heteroatom effect on the radiative and reactive relaxations of EE-1, 2-distyrylbenzene has been studied by stationary and time-resolved techniques on three compounds where the side phenyl groups were replaced by 4’ -pyridyl, 2’ -thienyl and 2’ -furyl groups. Contrary to the case of the hydrocarbon, whose photoisomerization is accompanied by substantial degradation, the EE → ZE photoisomerization prevails in the hetero-analogues, particularly in the thienyl derivative. The lack of conjugation in these 1, 2-substituted benzenes leads to a decrease in the fluorescence yield with respect to their 1, 4 and 1, 3 analogues (particularly in the presence of the heteroatoms), which is accompanied by an increase of the photoreaction quantum yield for the pyridyl- (significant) and thienyl- (very small) derivatives, whilst internal conversion is the prevalent deactivation pathway of the furyl derivative.
di-(heteroarylethenyl)benzenes ; photoisomerization ; fluorescence
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Podaci o izdanju
187 (2-3)
2007.
325-331
objavljeno
1010-6030
1873-2666
10.1016/j.jphotochem.2006.10.031