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    NázovApplication of spectroscopic and theoretical methods in the studies of photoisomerization and photophysical properties of the push-pull styryl-benzimidazole dyes
    Aut.údajeB. 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   izomerácie   emissions   isomerization  
    Jazyk dok.angličtina
    KrajinaVeľká Británia
    Systematika 54
    AnotáciaThe 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.
    URLLink do databázy WoS
    Kategória publikačnej činnosti ADC
    Číslo archívnej kópie37323
    Katal.org.BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
    Báza dátxpca - PUBLIKAČNÁ ČINNOSŤ
    OdkazyPERIODIKÁ-Súborný záznam periodika
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