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Application of spectroscopic and theoretical methods in the studies of photoisomerization and photophysical properties of the push-pull styryl-benzimidazole dyes
Title Application of spectroscopic and theoretical methods in the studies of photoisomerization and photophysical properties of the push-pull styryl-benzimidazole dyes Author info B. Jędrzejewska, B. Ośmiałowski, R. Zaleśny Author Jędrzejewska Beata (40%)
Co-authors Ośmiałowski Borys (30%)
Zaleśny Robert 1977- (30%) UMBFP08 - Katedra chémie
Source document Photochemical & Photobiological Sciences. Vol. 15, no. 1 (2016), pp. 117-128. - Cham : Springer Nature Switzerland AG, 2016 Keywords chémia - chemistry emisie - emissions izomerácie emissions izomerizácia - isomerization Language English Country Great Britian systematics 54 Annotation The synthesis and spectroscopic properties of a series of substituted 1,3-dimethyl-2-aminostyrylbenzimid-azolium iodides are described and discussed. The products were identified by NMR, IR and UV-Vis spectroscopy and elemental analysis. Their electronic absorption and fluorescence band positions are affected by the character of the substituent and by the solvent polarity. The fluorescence decay of the dyes shows two lifetimes interpreted in terms of emission from two forms of the dye in the excited state. Moreover, the photochemical trans> cis isomerization is reported for these compounds. It occurs from the first excited singlet state of the trans isomer to the cis isomer following a trans-S-0> S-1 excitation. The electron-donating character of the substituent in a styrene moiety is one of the crucial factors influencing the photoisomerization process. The structure of the cis isomer was established by H-1 and N-15 NMR. Experimental studies are supported by the results of quantum chemical calculations. Public work category ADC No. of Archival Copy 37323 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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