Copper Coordination Study in a Metal-Induced Chiral Polythiophene Aggregate

Copper Coordination Study in a Metal-Induced Chiral Polythiophene Aggregate
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金属诱导手性聚噻吩聚集体中的铜配位研究

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发表时间:
2014
期刊:
影响因子:
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通讯作者:
C. Alemán
C. Alemán
中科院分区:
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文献类型:
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作者:
J. Torras;C. Alemán

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手性区域规整聚噻吩,聚[(R)-3-(4-(4-乙基-2-恶唑啉-2-基)苯基)-噻吩](PEOPT),在铜盐存在下在氯仿中形成手性聚集体,加入乙腈后手性消失。在这里,我们报告了一个全面的量子力学研究分子间组装加合物与铜离子,可能参与这个开关过程。结果表明,由未解离的铜盐在氯仿中制成的铜加合物更喜欢属于不同聚噻吩链的配体的顺式(EOPT)2排列,有利于双链螺旋构象。相反,在乙腈中用铜离子掺杂的聚合物对于不同的聚噻吩侧链优选反(EOPT)2排列,有利于非手性π堆叠堆积。此外,另一个交联的相互作用,除了最稳定的NN型的特点。因此,在氯仿中的[Cu(EDOT)2] Cl 2加合物上的NO型相互作用已被证明是能量稳定的。然而...
The chiral regioregular polythiophene, poly[(R)-3-(4-(4-ethyl-2-oxazolin-2-yl)phenyl)-thiophene] (PEOPT), forms chiral aggregates in chloroform under copper salt presence, with chirality disappearing upon the addition of acetonitrile. We report here a comprehensive quantum mechanical study of intermolecular assembly adducts with a copper ion that may be involved in this switching process. Results indicate that copper adducts made of undissociated copper salt in chloroform prefer a syn-(EOPT)2 disposition of ligands belonging to different polythiophene chains, favoring a double-stranded helical conformation. In contrast, doped polymer with copper ions in acetonitrile prefers an anti-(EOPT)2 arrangement for the different polythiophene side chains, favoring a nonchiral π-stacked packing. Furthermore, another cross-linked interaction besides the most stable NN-type has been characterized. Thus, NO-type interactions on the [Cu(EDOT)2]Cl2 adducts in chloroform have been shown to be energetically stable. However...
DOI: 10.1021/jp807643p
发表时间: 2009-09-10
期刊: The journal of physical chemistry. A
影响因子: --
作者:
Yang Y;Weaver MN;Merz KM Jr
通讯作者: Merz KM Jr