Synthesis and Photophysical Properties of Two Novel Benzothiazole-Based Derivatives

doi:10.7517/j.issn.1674-0475.2007.02.81

Abstract

Abstract: Two novel A-π-A′ type benzothiazole-based derivatives with benzothiazolyl,phenyl-acetyl or pyridine cation groups as π electron acceptor,diethenylphenyl as π conjugated bridge: 4-(2-benzothiazolyl)ethenylchalcone(1) and 4-{4-[2-(benzothiazole-2-yl)ethenyl]styryl}-N-methylpyridinium iodide(2) were synthesized.The photophysical properties of the dyes in different solvents and solid matrices are researched.The results reveal that 2 has longer absorption,emission maximum and stronger fluorescence emission than 1 because of its stronger polarity and better planarity.Besides,organic dyes in poly methyl methacrylate/sol-gel composite glass experience an environment,which is the integration of pure PMMA and pure sol-gel glass.The results also reveal that the fluorescence intensity of the organic dyes in the solid matrices increase relative to that in solvents with same concentration because of little aggregation of molecules in solvent.The dyes have higher stability in composite glass.

Key words: benzothiazole-based derivatives, photophysical properties, composite glass

CLC Number:

TQ171

CAO Feng-xia, CAO Du-xia, LI Guo-zhong, TIAN Ying. Synthesis and Photophysical Properties of Two Novel Benzothiazole-Based Derivatives[J]. Imaging Science and Photochemistry, 2007, 25(2): 81-88.

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