首页|Regularly Tuning Quantum Interference in Single-Molecule Junctions through Systematic Substitution of Side Groups with Varied Electron Effects
Regularly Tuning Quantum Interference in Single-Molecule Junctions through Systematic Substitution of Side Groups with Varied Electron Effects
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Investigating the quantum interference effect in single molecules is essential to comprehensively understand the underlying mecha-nism of single-molecule charge transport.In this study,we employed the mother molecule m-OPE and introduced a series of side groups with various electronic effects at the 2-position of the central phenyl ring,creating four daughter m-OPE derivatives.The sin-gle molecular conductivities of these molecule wires were measured using the scanning tunneling microscope breaking junction technique.Our findings demonstrate that the substitutions regularly modulate the destructive quantum interference occurring within the m-OPE molecules.By combining optical and electrochemical investigations,along with density functional theory compu-tations,we discover that the conductivity of the molecules corresponds to the electron-donating/withdrawing ability of the substit-uents.Specifically,by adjusting the electron structures of the molecular backbone,we can systematically tailor the destructive quantum interference in the m-OPE molecules.
Xianjing Xie、Yirong Zhang、Junrui Zhang、Xingyuan Cui、Wei Liu、Xunshan Liu
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Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province,School of Chemistry and Chemical Engineering,Zhejiang Sci-Tech University,928 Second Street,Hangzhou,Zhejiang 310018,China
State Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,Jilin 130022,China
School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing,Jiangsu 210094,China
National Natural Science Foundation of ChinaNatural Science Foundation of Zhejiang ProvinceFundamental Research Funds of Zhejiang Sci-Tech University
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