L. Kun
2012
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Journal
Journal of Shenyang University of Chemical Technology
Abstract
A novel azobenzene compound containing bromobutoxy group and chiral carbon,4-(2-methyl butylcarboxylate)-4′-(1-bromobutoxy) azobenzene(CMB-Azo) was synthesized by subsequent reactions of substitution,hydrolysis and esterification.The structure of CMB-Azo was characterized by FT-IR and 1H-NMR.The Changes in UV-Vis spectra of CMB-Azo and 4-(1-bromobutyl carboxylate)-4′-(1-bromobutoxy) azobenzene(CBB-Azo) irradiated by the light were detected.The results showed that CMB-Azo and CBB-Azo in MeOH could undergo trans→cis isomerization irradiated with 355 nm UV-light,and cis→trans isomerization irradiated subsequently with 445 nm visible light.Compared with that of CBB-Azo,the photoisomerization of CMB-Azo changed slowly due to the introduction of chiral carbon.