Identifi cation of Molecular Flipping of an Asymmetric Tris(phthalocyaninato)Lutetium Triple-Decker Complex by Scanning Tunneling Microscopy/Spectroscopy  

作　　者：Xianghua Kong Shengbin Lei Yanlian Yang Ke Deng Guicun Qi Chen Wang 

机构地区：[1]Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]National Center for Nanoscience and Technology,Beijing 100190,China

出　　处：《Nano Research》2009年第3期235-241,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(90406019,20573116,and 20673029);the National Basic Research Program of China(973 Program,2006CB932100).

摘　　要：The assembling behavior and electronic properties of asymmetric tris(phthalocyaninato)lutetium triple-decker sandwich complex molecules(Lu2Pc3)on highly oriented pyrolytic graphite(HOPG)surfaces have been studied by scanning tunneling microscopy/spectroscopy(STM/STS)methods.Phase transitions were observed at different bias polarities,involving an ordered packing arrangement with fourfold symmetry at negative bias and an amorphous arrangement at positive bias.Molecular switching behaviour for individual Lu2Pc3 molecules was reported here according to the bias-polarity-induced flipping phenomena and the peak shift in dI/dV versus V curves at different voltage scanning directions.The sensitive response of the strong intrinsic molecular dipole to an external electric field is proposed to be responsible for molecular switching of Lu_(2)Pc_(3)at the solid/liquid interface.

关 键 词：Triple-decker sandwich complex phase transition molecular switch scanning tunneling microscopy/spectroscopy 

分 类 号：O62[理学—有机化学]