Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Protonation tuning of quantum interference in azulene-type single-molecule junctions
AU - Yang, Guogang
AU - Sangtarash, Sara
AU - Liu, Zitong
AU - Li, Xiaohui
AU - Sadeghi, Hatef
AU - Tan, Zhibing
AU - Li, Ruihao
AU - Zheng, Jueting
AU - Dong, Xiaobiao
AU - Liu, Junyang
AU - Yang, Yang
AU - Shi, Jia
AU - Xiao, Zongyuan
AU - Zhang, Guanxin
AU - Lambert, Colin
AU - Hong, Wenjing
AU - Zhang, Deqing
PY - 2017/11/1
Y1 - 2017/11/1
N2 - 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.
AB - 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.
U2 - 10.1039/C7SC01014A
DO - 10.1039/C7SC01014A
M3 - Journal article
VL - 8
SP - 7505
EP - 7509
JO - Chemical Science
JF - Chemical Science
SN - 2041-6520
IS - 11
ER -