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Freezing the conductance of platinum(II) complexes by quantum interference effect
Understanding the impact of substituents on the quantum interference effect at single molecule scale is of great importance for the design of molecular devices. In this work, three platinum(II) complexes with –H, –NH2 and –NO2 groups on conductive backbones were designed and synthesized. Single-mole...
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Published in: | Chinese chemical letters 2022-06, Vol.33 (6), p.3263-3266 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Understanding the impact of substituents on the quantum interference effect at single molecule scale is of great importance for the design of molecular devices. In this work, three platinum(II) complexes with –H, –NH2 and –NO2 groups on conductive backbones were designed and synthesized. Single-molecule conductance, which was measured using scanning tunnelling microscope break junction (STM-BJ) technique, demonstrated a conductance freeze phenomenon under the variation of substituents. Theoretical study revealed that, despite the electronic effect of the substituents shifting the energy level of molecular orbital, the quantum interference effect vanished the influence of electronic effect on the conductance and eventually leaded to the conductance freeze.
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ISSN: | 1001-8417 1878-5964 |
DOI: | 10.1016/j.cclet.2021.10.092 |