title: Guest-Induced Arylamide Polymer Helicity: Twist-Sense Bias and Solvent-Dependent Helicity Inversion.
abstract: A benzene/naphthalene alternately incorporated amide polymer was synthesized and characterized. (1) H NMR spectroscopy, fluorescence, and circular dichroism (CD) experiments indicated that, in chloroform, the polymer could be induced by the chiral l-aspartic acid dianion or one of its derivatives to form a helical tubular conformation with twist-sense bias. CD titration studies showed that the l-aspartic acid dianion (8 equiv.) could lead to a maximum Cotton effect. It was also revealed that the twist-sense bias obeyed the majority rule, and 70 % enantiomeric excess could realize the maximum helicity bias. Adding acetonitrile to the solution of chloroform caused inversion of the guest-induced helicity bias of the polymer.
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Ze-Kun
authors.initials: ZK
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Yun-Chang
authors.initials: YC
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Guo
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China. wanghui@fudan.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China.
authors.forename: Dan-Wei
authors.initials: DW
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, 220 Handan Road, Shanghai, 200433, China. ztli@fudan.edu.cn.
authors.forename: Zhan-Ting
authors.identifier: 0000-0003-3954-0015
authors.initials: ZT
authors.lastname: Li
keywords: foldamers; guest induction; helical structures; hydrogen bonds; polymers