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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
Názov Application of spectroscopic and theoretical methods in the studies of photoisomerization and photophysical properties of the push-pull styryl-benzimidazole dyes Aut.údaje B. Jędrzejewska, B. Ośmiałowski, R. Zaleśny Autor Jędrzejewska Beata (40%)
Spoluautori Ośmiałowski Borys (30%)
Zaleśny Robert 1977- (30%) UMBFP08 - Katedra chémie
Zdroj.dok. Photochemical & Photobiological Sciences. Vol. 15, no. 1 (2016), pp. 117-128. - Cham : Springer Nature Switzerland AG, 2016 Kľúč.slová chémia - chemistry emisie - emissions izomerácie emissions izomerizácia - isomerization Jazyk dok. angličtina Krajina Veľká Británia Systematika 54 Anotácia 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. Kategória publikačnej činnosti ADC Číslo archívnej kópie 37323 Katal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Báza dát xpca - PUBLIKAČNÁ ČINNOSŤ Odkazy PERIODIKÁ-Súborný záznam periodika 
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