Investigation of conformational and electron properties of biscyanine dyes

Abstract

The spectral and luminescent characteristics of four biscyanine dyes and corresponding monomer dye in ethanol solutions and in polyvinyl butyral have been investigated. The influence of angle between chromophores of biscyanine molecules on splitting and intensity of absorption bands has been discussed. It has been shown that the splitting of the biscyanine excited electron level S₁ is caused both dipole and resonant chromophor interactions. It has been found that the fluorescence quantum yields of the biscyanines in ethanol at room temperature are 0.005-0.02. The introduction of biscyanines in a polymer matrix, which provides rigidity of a polymethine chain, results in reduction of molecules trans-cis isomerization and consequently increase of fluorescence quantum yields.

Original language	English
Journal	Molecular Crystals and Liquid Crystals
Volume	427
DOIs	https://doi.org/10.1080/15421400590892145
Publication status	Published - 30 Nov 2005

Keywords

Biscyanine dyes
Covalently linked dimer
Exciton splitting
Fluorescence

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1080/15421400590892145

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@article{50629201070449a4af1bb87396f50d8c,

title = "Investigation of conformational and electron properties of biscyanine dyes",

abstract = "The spectral and luminescent characteristics of four biscyanine dyes and corresponding monomer dye in ethanol solutions and in polyvinyl butyral have been investigated. The influence of angle between chromophores of biscyanine molecules on splitting and intensity of absorption bands has been discussed. It has been shown that the splitting of the biscyanine excited electron level S1 is caused both dipole and resonant chromophor interactions. It has been found that the fluorescence quantum yields of the biscyanines in ethanol at room temperature are 0.005-0.02. The introduction of biscyanines in a polymer matrix, which provides rigidity of a polymethine chain, results in reduction of molecules trans-cis isomerization and consequently increase of fluorescence quantum yields.",

keywords = "Biscyanine dyes, Covalently linked dimer, Exciton splitting, Fluorescence",

author = "Ibrayev, {Niyazbek Kh} and Yeroshina, {Svetlana A.} and Ishchenko, {Aleksandr A.} and Mushkalo, {Igor L.}",

year = "2005",

month = nov,

day = "30",

doi = "10.1080/15421400590892145",

language = "English",

volume = "427",

journal = "Molecular Crystals and Liquid Crystals",

issn = "1542-1406",

publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - Investigation of conformational and electron properties of biscyanine dyes

AU - Ibrayev, Niyazbek Kh

AU - Yeroshina, Svetlana A.

AU - Ishchenko, Aleksandr A.

AU - Mushkalo, Igor L.

PY - 2005/11/30

Y1 - 2005/11/30

N2 - The spectral and luminescent characteristics of four biscyanine dyes and corresponding monomer dye in ethanol solutions and in polyvinyl butyral have been investigated. The influence of angle between chromophores of biscyanine molecules on splitting and intensity of absorption bands has been discussed. It has been shown that the splitting of the biscyanine excited electron level S1 is caused both dipole and resonant chromophor interactions. It has been found that the fluorescence quantum yields of the biscyanines in ethanol at room temperature are 0.005-0.02. The introduction of biscyanines in a polymer matrix, which provides rigidity of a polymethine chain, results in reduction of molecules trans-cis isomerization and consequently increase of fluorescence quantum yields.

AB - The spectral and luminescent characteristics of four biscyanine dyes and corresponding monomer dye in ethanol solutions and in polyvinyl butyral have been investigated. The influence of angle between chromophores of biscyanine molecules on splitting and intensity of absorption bands has been discussed. It has been shown that the splitting of the biscyanine excited electron level S1 is caused both dipole and resonant chromophor interactions. It has been found that the fluorescence quantum yields of the biscyanines in ethanol at room temperature are 0.005-0.02. The introduction of biscyanines in a polymer matrix, which provides rigidity of a polymethine chain, results in reduction of molecules trans-cis isomerization and consequently increase of fluorescence quantum yields.

KW - Biscyanine dyes

KW - Covalently linked dimer

KW - Exciton splitting

KW - Fluorescence

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U2 - 10.1080/15421400590892145

DO - 10.1080/15421400590892145

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VL - 427

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

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