Photochemical Properties of Poly[oxy[trans-4-(2-phenylethenyl) pyridiniomethyl]-1,2-ethanediyl chloride]

Abstract

Abstract:

Poly[oxy[trans-4-(2-phenyIethenyl)pyridiniomethyl]-1,2-ethanediyl chioride] (Ⅰ) was synthesized by the nucleophilic substitution of trans-4-(2-phenylethenyl)pyridme with poly(oxy[(iodomethyl)-1,2-etlianediyl]], following by halogen ion exchange with sodium chloride. The photochemical properties of the phenylethenylpyridinium functionalized photosensitive oligomer I as well as the relevant compound N-butyl-4-(2-phenylethenyl)pyridinium chloride (Ⅱ) were thoroughly studied in aqueous solution. It was found that under the irradiation of medium pressure mercury lamp with water cooling glass sheath (λ>310 nm) the only photochemical reaction of Ⅱ is trans-cis isomerization, while, under the same circumstance, I undergoes not (only trans-cis isomerization, but also photocycloaddition. It was also found that under the irradiation of low pressure raercuiy lamp (λ=254 nm) the cycloadded polymer will be photolyzed to form its original linear oligomer.

Key words: Phenylethenylpyridinium, Polyoxyethanediyl, Photochemical property

CLC Number:

O644

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ZHAO Shu-Na, ZHUANG Jun-Peng, ZHEN Yan, ZHANG Wen-Qin. Photochemical Properties of Poly[oxy[trans-4-(2-phenylethenyl) pyridiniomethyl]-1,2-ethanediyl chloride][J]. Chem. J. Chinese Universities, 2001, 22(S1): 256.

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Photochemical Properties of Poly[oxy[trans-4-(2-phenylethenyl) pyridiniomethyl]-1,2-ethanediyl chloride]

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