Single-molecule level control of host-guest interactions in metallocycle-C60 complexes

被引：48

作者：

Tang, Jian-Hong ^{[1
,2
]}

Li, Yueqi ^{[3
]}

Wu, Qingqing ^{[4
]}

Wang, Zixiao ^{[5
]}

Hou, Songjun ^{[4
]}

Tang, Kun ^{[1
,6
]}

Sun, Yue ^{[2
]}

Wang, Hui ^{[5
]}

Wang, Heng ^{[7
]}

Lu, Cheng ^{[8
]}

Wang, Xiang ^{[8
]}

Li, Xiaopeng ^{[7
]}

Wang, Dong ^{[8
]}

Yao, Jiannian ^{[1
]}

Lambert, Colin J. ^{[4
]}

Tao, Nongjian ^{[3
,5
]}

Zhong, Yu-Wu ^{[1
,6
]}

Stang, Peter J. ^{[2
]}

机构：

[1] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, Beijing Natl Lab Mol Sci,Key Lab Photochem, Beijing 100190, Peoples R China

[2] Univ Utah, Dept Chem, 315 South 1400 East,Room 2020, Salt Lake City, UT 84112 USA

[3] Arizona State Univ, Biodesign Ctr Bioelect & Biosensors, Tempe, AZ 85287 USA

[4] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[5] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210023, Jiangsu, Peoples R China

[6] Univ Chinese Acad Sci, Sch Chem Sci, Beijing 100049, Peoples R China

[7] Univ S Florida, Dept Chem, 4202 East Fowler Ave, Tampa, FL 33620 USA

[8] Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

美国国家卫生研究院; 中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

SUPRAMOLECULAR CHEMISTRY; JUNCTION CONDUCTANCE; AU(111); DESIGN; ELECTRONICS; ROTAXANE;

D O I：

10.1038/s41467-019-12534-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Host-guest interactions are of central importance in many biological and chemical processes. However, the investigation of the formation and decomplexation of host-guest systems at the single-molecule level has been a challenging task. Here we show that the single-molecule conductance of organoplatinum(II) metallocycle hosts can be enhanced by an order of magnitude by the incorporation of a C-60 guest molecule. Mechanically stretching the metallocycle-C-60 junction with a scanning tunneling microscopy break junction technique causes the release of the C-60 guest from the metallocycle, and consequently the conductance switches back to the free-host level. Metallocycle hosts with different shapes and cavity sizes show different degrees of flexibility to accommodate the C-60 guest in response to mechanical stretching. DFT calculations provide further insights into the electronic structures and charge transport properties of the molecular junctions based on metallocycles and the metallocycle-C-60 complexes.

引用

页数：9

共 62 条

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