Nano Research

Article Title

Identification of molecular flipping of an asymmetric tris(phthalocyaninato) lutetium triple-decker complex by scanning tunneling microscopy/spectroscopy


Triple-decker sandwich complex, phase transition, molecular switch, scanning tunneling microscopy/spectroscopy


The assembling behavior and electronic properties of asymmetric tris(phthalocyaninato) lutetium triple- decker sandwich complex molecules (Lu Pc ) on highly oriented pyrolytic graphite (HOPG) surfaces have 2 3 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 Lu Pc molecules was reported here according to the bias-polarity-induced flipping phenomena and the 2 3 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 Pc at the solid/liquid interface. 2 3

Graphical Abstract


Tsinghua University Press