Conformational Chirality of the Biphenyl Groups Induced by the Aggregation of Poly {bis[4-(4＇-(S)-2-methylbutoxy)- Biphenoxy] Phosphazene}  

作　　者：唐贤慧 LI Baozong 李艺 YANG Yonggang 

机构地区：[1]Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2016年第5期1162-1166,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(No.21274098)

摘　　要：Poly{bis[4-（4＇-（S）-2-methylbutoxy）biphenyloxy]phosphazene}（PP-C） was designed and successfully synthesized, and then characterized by means of FT-IR spectroscopy, ~1H- and ^（31）P-NMR, GPC spectroscopy, wide angle X-ray diffraction and differential scanning calorimetry. The results indicated that for PP-C, the M_w is 2.18×10~5 and the PDI is 1.96. PP-C was a kind of crystallized polymer with a crystallizing point of -2.0 ℃ and a melting point of 28 ℃. The conformational chirality of the PP-C molecules was studied using circular dichroism spectrum. It was found that in dilute THF solution, the biphenyl groups in the PP-C molecules twisted randomly. However, when the PP-C formed aggregates, the biphenyl groups tended to twist single-handedly, which was controlled by the adjacent chiral alkoxy groups.Poly{bis[4-（4＇-（S）-2-methylbutoxy）biphenyloxy]phosphazene}（PP-C） was designed and successfully synthesized, and then characterized by means of FT-IR spectroscopy, ~1H- and ^（31）P-NMR, GPC spectroscopy, wide angle X-ray diffraction and differential scanning calorimetry. The results indicated that for PP-C, the M_w is 2.18×10~5 and the PDI is 1.96. PP-C was a kind of crystallized polymer with a crystallizing point of -2.0 ℃ and a melting point of 28 ℃. The conformational chirality of the PP-C molecules was studied using circular dichroism spectrum. It was found that in dilute THF solution, the biphenyl groups in the PP-C molecules twisted randomly. However, when the PP-C formed aggregates, the biphenyl groups tended to twist single-handedly, which was controlled by the adjacent chiral alkoxy groups.

关 键 词：polyphosphazene biphenyl chirality aggregates 

分 类 号：TQ317[化学工程—高聚物工业]