STM study on quinacridone derivative assemblies: modulation of the two-dimensional structure by coadsorption with dicarboxylic acids.
STM study on quinacridone derivative assemblies: modulation of the two-dimensional structure by coadsorption with dicarboxylic acids.
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DOI：
10.1021/la051087a
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发表时间：
2005-08
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影响因子：
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通讯作者：
Xunyu Yang;Z. Mu;Zhiqiang Wang;Xi Zhang;Jia Wang;Yue Wang
中科院分区：
文献类型：
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作者：
Xunyu Yang;Z. Mu;Zhiqiang Wang;Xi Zhang;Jia Wang;Yue Wang
描述了用扫描隧道显微镜观察到的N，N‘-二烷基取代喹吖啶酮衍生物在高取向热解石墨上的二维(2D)组装，并着重讨论了二元酸的共吸附是否能调节超分子结构。我们的实验表明，当不同长度的二元酸在液/石墨界面上共吸附时，喹吖啶酮类化合物可以形成不同的二维纳米结构。有趣的是，N，N‘-二十六烷基取代的喹吖啶酮衍生物与十五碳二元酸共吸附时，在两根柱子中交替呈现两种不同的构象，形成格状结构。研究表明，通过引入客体分子可以调节不同相互作用的协同效应，从而形成不同的自组装纳米结构。
We describe the two-dimensional (2D) assemblies of N,N'-dialkyl-substituted quinacridone derivatives on highly orientated pyrolytic graphite observed by scanning tunneling microscopy, and focus our discussion on whether the supramolecular organization can be modulated by the coadsorption of dicarboxylic acids. Our experiments have demonstrated that the quinacridone derivatives can form different 2D nanostructures when coadsorbed with dicarboxylic acids of different length at the liquid/graphite interface. Interestingly, N,N'-dihexadecyl-substituted quinacridone derivative alternately takes two different conformations in two columns for its coadsorption with pentadecanedioic acid and form a gridlike structure. It is shown that a cooperative effect of different interactions can be modulated by introducing guest molecule, leading to formation of different self-assembled nanostructures.