Controlled Handedness of Twisted Lamellae in Banded Spherulites of Isotactic Poly(2-vinylpyridine) as Induced by Chiral Dopants

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Title:	Controlled Handedness of Twisted Lamellae in Banded Spherulites of Isotactic Poly(2-vinylpyridine) as Induced by Chiral Dopants
Authors:	王孝方;Wen, Tao;Shen, Han-Yun;Wang, Hsiao-Fang;Mao, Yung-Cheng;Chuang, Wei-Tsung;Tsai, Jing-Cherng;Ho, Rong-Ming
Contributors:	工學院化學工程與材料工程學系
Keywords:	chiral dopants;Chirality;Circular dichroism;Complex systems;crystal growth;Crystal structure;Crystallinity;Crystallization;Dichroism;Dopants;Handedness;helical structures;Isotacticity;Lamellae;Polymers;Spherulites
Date:	2015-11-23
Issue Date:	2026-04-21 14:41:35 (UTC+8)
Publisher:	John Wiley and Sons Ltd;Weinheim: WILEY-VCH Verlag
Abstract:	摘要： AbstractHerein, we suggest a unique approach to control the handedness of twisted lamellae in banded spherulites of a stereoregular polymer, isotactic poly(2‐vinylpyridine) (iP2VP). When (R)‐ or (S)‐hexahydromandelic acid (HMA), which can associate with iP2VP, was introduced as a chiral dopant, mirror‐image CD spectra in the complex systems showed induced circular dichroism (ICD) of the iP2VP by chiral HMA. Banded spherulites resulting from lamellar twisting due to the imbalanced stresses at the opposite folding surfaces could be formed by crystallization of the iP2VP/HMA complexes, which had a crystalline structure similar to that of neat iP2VP. A preferential sense of the twisted crystalline lamellae was found in the iP2VP/HMA complex, thus suggesting homochiral evolution from conformational to hierarchical chirality. 其他題名： Angew. Chem. Int. Ed 出版者： Weinheim: WILEY-VCH Verlag 出版日期： 2015-11-23 出處： Angewandte Chemie International Edition, 2015-11, Vol.54 (48), p.14313-14316 資源來源： Wiley Online Library 版權： 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim 版權： 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. 版權： 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 版權： Copyright Wiley Subscription Services, Inc. Nov 2015 識別號： ISSN: 1433-7851 識別號： ISSN: 1521-3773 識別號： EISSN: 1521-3773 識別號： DOI: 10.1002/anie.201506186 識別號： PMID: 26447740 識別號： CODEN: ACIEAY
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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