Giant Conductance Enhancement of Intramolecular Circuits through Interchannel Gating
Hongliang Chen,Haining Zheng,Chen Hu,Kang Cai,Yang Jiao,Long Zhang,Feng Jiang,Indranil Roy,Yunyan Qiu,Dengke Shen,Yuanning Feng,Fehaid Alsubaie,Hong Guo,Wenjing Hong,J. Fraser Stoddart,J. Fraser Stoddart,J. Fraser Stoddart +16 more
- Vol. 2, Iss: 2, pp 378-389
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TLDR
The molecular design presented herein constitutes a proof-of-principle approach to charged intramolecular circuits that are desirable for quantum circuits and devices and boosts the total conductance of the two-channel circuit.Abstract:
Summary For neutral intramolecular circuits with two constitutionally identical branches, a maximum 4-fold increase in total conductance can be obtained according to constructive quantum interference (CQI). For charged intramolecular circuits, however, the strong electrostatic interactions entangle the quantum states of these two parallel pathways, thus introducing complicated transport behavior that warrants experimental investigation of the intramolecular circuit rules. Here, we report that a tetracationic cyclophane with parallel channels exhibits a 50-fold conductance enhancement compared with that of a single-channel control, an observation that supplements intramolecular circuit law in systems with strong Coulombic interactions. Flicker noise measurements and theoretical calculations show that strong electrostatic interactions between charged parallel channels—serving as the chemical gate to promote the effective conductance of each channel—and CQI boosts the total conductance of the two-channel circuit. The molecular design presented herein constitutes a proof-of-principle approach to charged intramolecular circuits that are desirable for quantum circuits and devices.read more
Citations
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