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Literature DB >> 26410775

Relaxation Photoprocesses in a Crowned Styryl Dye and its Metal Complex.

Michael V Rusalov¹, Boris M Uzhinov², Sergey I Druzhinin³, Vladimir L Ivanov², Michael Ya Melnikov², Sergey P Gromov⁴, Sergey K Sazonov⁴, Michael V Alfimov⁴.

Abstract

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.

Entities: Chemical

Keywords: Complex formation; Crown ether; Molecular rotor; Photorecoordination; Styryl dye

Year: 2015 PMID： 26410775 DOI： 10.1007/s10895-015-1660-8

Source DB: PubMed Journal: J Fluoresc ISSN： 1053-0509 Impact factor: 2.217

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References

13 in total

Relaxation Photoprocesses in a Crowned Styryl Dye and its Metal Complex.

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