Literature DB >> 31338718

Optical Properties of Azo-Benzothiazole Side Chain Liquid Crystalline Polymers: Effect of Solvents, Substituents and Temperatures.

Nur Syafiqah Farhanah Dzulkharnien1, Md Rabiul Karim2, N Idayu Zahid1, Nor Mas Mira A Rahman1, Iskandar Abdullah1, Noordini M Salleh3.   

Abstract

The optical properties of a series of side chain liquid crystalline polymers (P1-P3) containing azo-benzothiazole mesogen with different terminal substituents (-H, -CH3 and -OCH2CH3) in four organic solvents of varying polarity have been investigated by absorption and fluorescence spectral analysis. Solvatochromic studies of P1-P3 did not show any regular variation on the absorption and emission intensities with changing the polarity of solvent. Theoretical studies were performed based on different solvent correlation methods such as Dimroth-Reichardt and Kamlet-Taft methods to investigate the solute-solvent interactions. Both absorption and emission maxima of investigated polymers were bathochromically shifted with the replacement of sixth position hydrogen atom by electron donating groups in benzothiazole moiety. The emission intensities of the studied polymers showed decreasing trend with increasing temperature.

Entities:  

Keywords:  Azo-benzothiazole; Side chain liquid crystalline polymer; Solvatochromism; Thermochromism

Year:  2019        PMID： 31338718     DOI： 10.1007/s10895-019-02418-9

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


  13 in total

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Journal:  J Fluoresc       Date:  2008-07-22       Impact factor: 2.217

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10.  Effects of Pyrazine Derivatives and Substituted Positions on the Photoelectric Properties and Electromemory Performance of D⁻A⁻D Series Compounds.

Authors:  Xuejing Song; Lingqian Kong; Hongmei Du; Xiangyu Li; Hanlin Feng; Jinsheng Zhao; Yu Xie
Journal:  Materials (Basel)       Date:  2018-10-22       Impact factor: 3.623
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