文献类型：期刊文献

英文题名：Single-Molecule Charge Transport through Thiazole-End-Capped Conjugated Oligomers: Synergistic Au-N and Au-πInteractions and Controllable Self-Decoupled Properties

作者：Li, Yunpeng[1]; Zhou, Yu[2]; Li, Yingjie[1]; Hong, Wenjing[2]; Li, Hongxiang[1]

机构：[1] Key Laboratory for Advanced Materials, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China

年份：2022

卷号：126

期号：14

起止页码：6420

外文期刊名：Journal of Physical Chemistry C

收录：EI(收录号：20221611974404)

语种：英文

外文关键词：Scanning tunneling microscopy - Electrodes - X ray photoelectron spectroscopy - Gold compounds - Quantum interference devices

摘要：The chemical identity of anchoring groups has a great impact on the charge transport in single-molecule junctions. In this paper, a new π-conjugated anchoring group, thiazole, with a built-in quantum interference (QI) feature for Au-molecule-Au junction is reported. The charge transport properties of thiazole-end-capped conjugated molecules are investigated by the scanning tunneling microscopy break junction (STMBJ) technique. Experimental results show that the conductance of junctions changes distinctly with the substitution positions of thiazole, which is ascribed to the quantum interference and the change of coupling strength between molecule and electrodes. Notably, the conductance change reaches 331 times, much higher than that of benchmark anchoring group pyridine-terminated molecules. X-ray photoelectron spectroscopy (XPS) experiments and DFT calculations confirm that Au-N and Au-πinteractions co-serve as anchoring sources, and the coupling strength between thiazole anchor and electrodes is tunable. These results highlight the built-in QI feature of thiazole anchor and enrich the self-decoupling strategies for conjugated molecules. ? 2022 American Chemical Society. All rights reserved.