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Protonation tuning of quantum interference in azulene-type single-molecule junctions
Chemical Science ( IF 8.4 ) Pub Date : 2017-09-07 00:00:00 , DOI: 10.1039/c7sc01014a
Guogang Yang 1, 2, 3, 4, 5 , Sara Sangtarash 6, 7, 8, 9 , Zitong Liu 10, 11, 12, 13, 14 , Xiaohui Li 1, 2, 3, 4, 5 , Hatef Sadeghi 6, 7, 8, 9 , Zhibing Tan 1, 2, 3, 4, 5 , Ruihao Li 1, 2, 3, 4, 5 , Jueting Zheng 1, 2, 3, 4, 5 , Xiaobiao Dong 10, 11, 12, 13, 14 , Junyang Liu 1, 2, 3, 4, 5 , Yang Yang 1, 2, 3, 4, 5 , Jia Shi 1, 2, 3, 4, 5 , Zongyuan Xiao 1, 2, 3, 4, 5 , Guanxin Zhang 10, 11, 12, 13, 14 , Colin Lambert 6, 7, 8, 9 , Wenjing Hong 1, 2, 3, 4, 5 , Deqing Zhang 10, 11, 12, 13, 14
Affiliation  

The protonation of azulene derivatives with quantum interference effects is studied by the conductance measurements of single-molecule junctions. Three azulene derivatives with different connectivities are synthesized and reacted with trifluoroacetic acid to form the protonated states. It is found that the protonated azulene molecular junctions produce more than one order of magnitude higher conductance than the neutral states, while the molecules with destructive interference show more significant changes. These experimental observations are supported by our recently-developed parameter free theory of connectivity, which suggests that the largest conductance change occurs when destructive interference near the Fermi energy in the neutral state is alleviated by protonation.

中文翻译:

氮杂型单分子结中量子干涉的质子化调谐

通过单分子结的电导测量研究了具有量子干扰效应的z菁衍生物的质子化。合成了三种具有不同连接性的a并衍生物,并使其与三氟乙酸反应形成质子化状态。发现质子化的z烯分子结比中性态产生的电导率高一个数量级,而具有破坏性干扰的分子表现出更显着的变化。这些实验性观察得到我们最近开发的无参数连通性理论的支持,该理论表明,当质子化作用减轻中性状态下费米能量附近的破坏性干扰时,最大的电导变化就会发生。
更新日期:2017-09-20
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