Assemblies at the liquid-solid interface: chirality expression from molecular conformers.
Assemblies at the liquid-solid interface: chirality expression from molecular conformers.
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DOI：
10.1002/cphc.201200730
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
Yongtao Shen;Ningbo Zhu;Xue-mei Zhang;S. Lei;Zhongqing Wei;Min Li;Dahui Zhao;Q. Zeng;Chen Wang
中科院分区：
文献类型：
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作者：
Yongtao Shen;Ningbo Zhu;Xue-mei Zhang;S. Lei;Zhongqing Wei;Min Li;Dahui Zhao;Q. Zeng;Chen Wang
由于手性在多相催化、不对称催化和化学传感等领域具有重要作用，因此超分子手性的测定和调控引起了人们极大的兴趣。大量的研究和综述报道了非手性分子沉积到表面或界面后，在吸附的分子单层内形成二维（2D）超分子手性结构。通过这些卓越的研究，研究人员已经能够对表面的手性组织进行分类，包括通过单个吸附事件产生的局部手性（称为点手性）和单个吸附基序的手性排列（称为组织手性）。换句话说，表面手性可以在两个不同的层次上表达：点手性（局部手性基序）和局部组织手性（2D手性域），分别代表2D手性的第一和第二层次。之前，我们已经报道了共轭链状分子oligo（o-phenyleneethynylene-alt-p-phenyleneethynylene）（Foldamer 1）的折叠，其由交替的邻苯亚乙炔（o-PE）和对苯亚乙炔（p-PE）单元（图1a）构建成螺旋构象。这种螺旋结构赋予系统新的特性。在目前的工作中，两种不同的分子
Determination and manipulation of supramolecular chirality has attracted great interest as chirality plays a significant role in fields such as heterogeneous, asymmetric catalysis and chemical sensing. A number of studies and reviews have reported the formation of two-dimensional (2D) supramolecular chiral structures within an adsorbed molecular monolayer following deposition of achiral molecules onto surfaces or interfaces. Through these remarkable studies, researchers have been able to classify chiral organisation at a surface including both the creation of local chirality by single adsorption events, termed point chirality, and the chiral arrangements of individual adsorption motifs, termed organisational chirality. In other words, surface chirality can be expressed at two different levels : point chirality (local chiral motif) and local organizational chirality (2D chiral domains), representing the first and second hierarchies of 2D chirality, respectively. Previously, we have reported the folding of a conjugated chain-like molecule oligo(o-phenyleneethynylene-alt-p-phenyleneethynylene) (Foldamer 1) which is constructed from alternating ortho-Phenyleneethynylene (o-PE) and para-phenyleneethynylene (p-PE) units (Figure 1 a) into a helical conformation. This helical structure imparted novel characteristics to the system. In the current work, two different molecular