Adjusting Conformational Switching Behavior of Helical Polycarbodiimides Through Substituent Induced Polarity Effects

被引：13

作者：

Kennemur, Justin G. ^{[1
]}

Kilgore, Chris A. ^{[1
]}

Novak, Bruce M. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2011年 / 49卷 / 03期

关键词：

aromatic interactions; carbodiimide; chiral; conformational change; functionalization of polymers; helical; heter-oatom containing polymers; molecular machine; optical switching; polarization; polycarbodiimide; polyguanidine; reversible; stimuli-sensitive polymers; tunable; SENSE-SELECTIVE POLYMERIZATION; AROMATIC INTERACTIONS; POLYMERS; CARBODIIMIDES; POLYGUANIDINES; RINGS;

D O I：

10.1002/pola.24484

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

Recent discoveries on the improved versatility of helical polycarbodiimides capable of undergoing low energy reversible conformational changes from realignment of their restricted polyarene pendant groups has led to seven new polycarbodiimides that each present unique information in regards to how the electronics and connectivity of the arene pi-system play a crucial role in the behavior of these polymers. In addition to their individual anomalous behavior, this series of functional polymers unlock new answers toward the global understanding of the governing forces behind this complex switching process. Through the incorporation of functional groups covalently attached to the naphthalene pendant, dramatic changes and new application of these systems are realized. Variable temperature polarimetry is used to observe the reversible conformational changes of these chiral polymers. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 49: 719-728, 2011

引用

页码：719 / 728

页数：10

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