聚对苯撑乙烯衍生物的二维自组装：从二聚体到手性玫瑰花结

2D self-assembly of oligo(p-phenylene vinylene) derivatives: from dimers to chiral rosettes.

作者信息

Miura Atsushi, Jonkheijm Pascal, De Feyter Steven, Schenning Albertus P H J, Meijer E W, De Schryver Frans C

机构信息

Department of Chemistry, Laboratory of Photochemistry and Spectroscopy, Katholieke Universiteit Leuven, Celestijnenlaan 200-F, 3001 Leuven, Belgium.

出版信息

Small. 2005 Jan;1(1):131-7. doi: 10.1002/smll.200400008.

DOI:10.1002/smll.200400008

PMID:17193363

Abstract

Enantiomerically pure oligo(p-phenylene vinylene) diaminotriazine derivatives and a short structurally related achiral diaminotriazine derivative, all having a rigid backbone in common, are studied to self-assemble at the solution-graphite interface by scanning tunneling microscopy. As a function of the length of the backbone, different two-dimensional motifs are formed (dimers and rosettes) that are rationalized in terms of the balance between different intermolecular interactions, in this case, intermolecular hydrogen bonding and the packing requirements of the alkyl chains on a graphite surface. In addition, the effect of molecular chirality on monolayer chirality is investigated, revealing molecular size-dependent expressions of the monolayer chirality.

摘要

对一系列对映体纯的聚对苯撑乙烯二氨基三嗪衍生物以及一种结构相关的短链非手性二氨基三嗪衍生物进行了研究，它们都具有共同的刚性主链。通过扫描隧道显微镜研究了这些化合物在溶液 - 石墨界面的自组装行为。作为主链长度的函数，形成了不同的二维图案（二聚体和玫瑰花结），这些图案可根据不同分子间相互作用之间的平衡来解释，在这种情况下，是分子间氢键和石墨表面烷基链的堆积要求之间的平衡。此外，还研究了分子手性对单层手性的影响，揭示了单层手性的分子尺寸依赖性表达。