Influence of substituents on two-dimensional ordering of oligo(phenylene-ethynylene)s--a scanning tunneling microscopy study.
Influence of substituents on two-dimensional ordering of oligo(phenylene-ethynylene)s--a scanning tunneling microscopy study.
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DOI：
10.1021/la048538w
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发表时间：
2004-08
期刊：
影响因子：
--
通讯作者：
Z. Mu;Xunyu Yang;Zhiqiang Wang;Xi Zhang;Jinling Zhao;Zhishan Bo
中科院分区：
文献类型：
--
作者：
Z. Mu;Xunyu Yang;Zhiqiang Wang;Xi Zhang;Jinling Zhao;Zhishan Bo
用扫描隧道显微镜研究了不同取代基的烷氧基低聚(苯乙撑)S分子在高取向热解石墨上的二维组装。研究发现，在低聚(苯乙炔)S中引入不同的端基或二乙撑键可以显著改变其在HOPG上的二维有序性。羧基端基可以通过分子间氢键引导共轭低聚物形成有序线。控制共轭分子二维组装的可能性在有机光电子器件的设计中具有重要意义。
Two-dimensional (2D) assemblies of alkoxy-substituted oligo(phenylene-ethynylene)s bearing different substituents adsorbed on highly oriented pyrolytic graphite (HOPG) were studied by using scanning tunneling microscopy. It was found that the introduction of different endgroups or a biethynylene linkage into oligo(phenylene-ethynylene)s can significantly change their 2D ordering on HOPG. The carboxylic endgroups can direct the conjugated oligomers to form ordered lines through intermolecular hydrogen bonding. The possibility of controlling the 2D assemblies of conjugated molecules is of importance in designing organic optoelectronic devices.