Temperature-controlled self-assembling structure with selective guest-recognition at the liquid-solid interface
Temperature-controlled self-assembling structure with selective guest-recognition at the liquid-solid interface
复制标题
液固界面选择性客体识别的温控自组装结构
DOI：
10.1039/c2cp43244g
复制
发表时间：
2013-01-01
影响因子：
3.3
通讯作者：
Wang, Chen
中科院分区：
文献类型：
--
作者：
Li, Yibao;Liu, Chunhua;Wang, Chen
利用扫描隧道显微镜在液/固界面上研究了温度对2，6，11-tricarboxydecyloxy-3，7，10-triundecyloxy-TTT自组装的影响。结果表明，通过调节衬底温度，可以精确地调节二维自组装ASYM-TTT的堆积结构。从20℃到35℃的温度变化导致了两个相变和堆积密度从每纳米0.161个分子增加到0.179个分子(2)。密度泛函理论(DFT)计算表明，它们的相互作用能相似。特别是，实验结果进一步说明客体分子，如酞菁，只在更紧密的堆积结构领域的优先吸附。
We investigate the influence of temperature on the self-assembly of 2,6,11-tricarboxydecyloxy-3,7,10-triundecyloxy triphenylene (asym-TTT) adsorbed on HOPG using scanning tunneling microscopy (STM) at the liquid/solid interface. We show that the packing structures of 2D self-assembled asym-TTT can be precisely tuned by adjusting the substrate temperature. The temperature change from 20 degrees C to 35 degrees C induces two phase transitions and increment in the packing density from 0.161 to 0.179 molecules per nm(2). The density-functional theory (DFT) calculations reveal that their interaction energies are similar. In particular, the experimental findings further illustrate the preferential adsorption of guest molecules, such as phthalocyanine, only in the domain of more close packing structures.