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Synthesis, Chiroptical Properties of a Helical Polyacetylene Derivative Carrying Urea Moieties
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作者 刘瑞源 Tong Zhang +2 位作者 Xiao-dong yang yi-chen yan 瞿金清 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2014年第7期931-940,共10页
A novel phenylacetylene derivative containing urea groups was synthesized and polymerized with a Rh catalyst to give the corresponding polymer, poly(1) with moderate number-average molecular weights. The poly(1) w... A novel phenylacetylene derivative containing urea groups was synthesized and polymerized with a Rh catalyst to give the corresponding polymer, poly(1) with moderate number-average molecular weights. The poly(1) was soluble in toluene, CHCI3, CH2C12, THF, DMF, and DMSO, but insoluble in hexane, diethyl ether and MeOH. The specific rotation and circular dichroism (CD) spectroscopic studies revealed that poly(1) took predominantly one-handed helical structures. The presence of intramolecular hydrogen bonding was confirmed by liquid-state IR spectroscopy. The helicity of poly(1) could be tuned by temperature and anion. The helical conformation of the polymer was stable against Br but susceptible to F. 展开更多
关键词 ANION HELIX Hydrogen bonding POLYACETYLENE Urea group
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