Relaxation photoprocesses in a crowned styryl dye and its metal complexстатья
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Дата последнего поиска статьи во внешних источниках: 11 января 2016 г.
Аннотация:The effects of solvent and crown-ether moiety on
spectral properties of pyridinium styryl dye were studied by
steady-state absorption and fluorescent spectroscopy. Analysis
of viscosity and polarity effects on fluorescence quantum
yield and Stokes shift permitted us to suggest that there is a
two stage process of excited state relaxation. The macrocyclic
moiety has a little influence on the first stage of relaxation,
which manifests itself in a magnitude of Stokes shift, but suppresses
considerably the second stage, which manifests itself
in a magnitude of fluorescence quantum yield. The metal
complex shows an additional stage of excited state relaxation,
namely, photorecoordination of metal cation within the macrocyclic
cavity.