Switching of Charge Transport Pathways via Delocalization Changes in Single-Molecule Metallacycles Junctions

被引：61

作者：

Li, Ruihao ^{[1
]}

Lu, Zhengyu ^{[1
]}

Cai, Yuanting ^{[1
]}

Jiang, Feng ^{[1
]}

Tang, Chun ^{[1
]}

Chen, Zhixin ^{[1
]}

Zheng, Jueting ^{[1
]}

Pi, Jiuchan ^{[1
]}

Zhang, Rui ^{[1
]}

Liu, Junyang ^{[1
]}

Chen, Zhao-Bin ^{[1
]}

Yang, Yang ^{[1
]}

Shi, Jia ^{[1
]}

Hong, Wenjing ^{[1
]}

Xia, Haiping ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2017年 / 139卷 / 41期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

QUANTUM INTERFERENCE; TRANSITION-METAL; BREAK JUNCTIONS; CONDUCTANCE; ELECTRONICS; CHEMISTRY; WIRES; METALLABENZENES; AROMATICITY; COMPLEXES;

D O I：

10.1021/jacs.7b06400

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To explore the charge transport through metalla-aromatics building blocks, three metallacycles complexes were synthesized, and their single-molecule conductances were characterized by using mechanically controllable break junction technique. It is found that the conductance of the metallacycles junction with phosphonium group is more than 1 order of magnitude higher than that without phosphonium group. X-ray diffraction and UV-vis absorption spectroscopy suggested that the attached phosphonium group makes metallacycles more delocalized, which shortened the preferred, charge traps: port pathway and significantly enhanced the single molecule conductance. This work revealed that the delocalization of metalla-aromatics could be used to switch the charge transport pathway of single-molecule junctions and thus tune the charge transport abilities significantly.

引用

页码：14344 / 14347

页数：4

共 41 条

[1] The Chemistry of Aromatic Osmacycles [J].