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Inne
One- and two-photon-induced isomerization of styryl compounds possessing A-π-A′ structure
Autorzy
Rok wydania
2016
Czasopismo
Numer woluminu
132
Strony
237-247
DOI
10.1016/j.dyepig.2016.05.001
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Two styryl compounds with A-π-A′ structure that feature a fixed pyridine ring as an electron acceptor (A) and pyridine or 5,6,7,8-tetrahydroisoquinoline cation as the other acceptor (A′) have been synthesized. Their structures were elucidated by means of NMR and IR spectroscopy. One-photon fluorescence, fluorescence quantum yields and lifetimes were investigated. It was found that both visible (408 nm) and near-infrared (800 nm) light promotes the conversion of the E-isomer of the studied compounds to the Z-isomer. Under the UV irradiation (310 nm) the obtained Z-isomer reverts to the initial form in tens of minutes. The observed inter-conversion was found to be fast and efficient. The trans-to-cis isomerization was followed by decomposition of the compound upon longer than 100 s exposure to light as indicated from mass spectra.
Słowa kluczowe
Styryl dyes, Synthesis, One- and two-photon induced isomerization
Adres publiczny
http://dx.doi.org/10.1016/j.dyepig.2016.05.001
Strona internetowa wydawcy
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