Synthesis and chiroptical properties of helical polyallenes bearing chiral cholesteryl pendant groups

被引：6

作者：

Yu, Zhi-Peng ^{[1
]}

Liu, Na ^{[1
]}

Lin, Ya-Lan ^{[1
]}

Huang, Jian ^{[1
]}

Wang, Hui-Qing ^{[1
]}

Wu, Zong-Quan ^{[1
]}

机构：

[1] HeFei Univ Technol, Sch Chem Engn, Dept Polymer Sci & Engn, Hefei Key Lab Adv Funct Mat & Devices, Tunxi Rd 193, Hefei 230009, Peoples R China

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2017年 / 55卷 / 13期

基金：

中国国家自然科学基金;

关键词：

chirality; chiroptical activity; helix; living polymerization; polyallene; LIVING COORDINATION POLYMERIZATION; PI-ALLYLNICKEL CATALYST; MECHANISTICALLY DISTINCT; ALLENE DERIVATIVES; BLOCK-COPOLYMERS; FACILE SYNTHESIS; SINGLE CATALYST; AMPLIFICATION; ACID; NANOPARTICLES;

D O I：

10.1002/pola.28609

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A cholesteryloxyallene (1) bearing chiral cholesteryl pendant group was designed and synthesized. Living polymerization of this monomer with an allylnickel complex as a catalyst give poly(cholesteryloxyallene)s (poly-1(m)s) in high yields with controllable molecular weights and narrow molecular weight distributions. These polymers were found to possess a dynamic helical conformation with a preferred handedness in n-hexane as confirmed by circular dichroism and absorption spectra as well as optical ratios. The helical conformation of the polymers was revealed to stabilize as the number of repeat units increased until the degree of polymerization reached 100. The helical conformation of poly-1(100) could be controlled by altering the temperature of solutions. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 2227-2233

引用

页码：2227 / 2233

页数：7

共 52 条

[51] Synthesis of poly(ethylene glycol) functionalized star-shaped tricationic imidazolium based ionic liquid [J].