Single-Molecule Conductance of Viologen–Cucurbit[8]uril Host–Guest Complexes

Wei Zhang; Shiyu Gan; Andrea Vezzoli; Ross J. Davidson; David C. Milan; Konstantin V. Luzyanin; Simon J. Higgins; Richard J. Nichols; Andrew Beeby; Paul J. Low; Buyi Li; Li Niu

doi:10.1021/acsnano.6b00786

journal article·2016-05-24Open access

Single-Molecule Conductance of Viologen–Cucurbit[8]uril Host–Guest Complexes

Wei Zhang, Shiyu Gan, Andrea Vezzoli, Ross J. Davidson, David C. Milan, Konstantin V. Luzyanin, Simon J. Higgins, Richard J. Nichols, Andrew Beeby, Paul J. Low, Buyi Li, Li Niu

ACS Nano· Volume 10· Issue 5

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Source abstract

Abstract

The local molecular environment is a critical factor which should be taken into account when measuring single-molecule electrical properties in condensed media or in the design of future molecular electronic or single molecule sensing devices. Supramolecular interactions can be used to control the local environment in molecular assemblies and have been used to create microenvironments, for instance, for chemical reactions. Here, we use supramolecular interactions to create microenvironments which influence the electrical conductance of single molecule wires. Cucurbit[8]uril (CB[8]) with a large hydrophobic cavity was used to host the viologen (bipyridinium) molecular wires forming a 1:1 supramolecular complex. Significant increases in the viologen wire single molecule conductances are observed when it is threaded into CB[8] due to large changes of the molecular microenvironment. The results were interpreted within the framework of a Marcus-type model for electron transfer as arising from a reduction in outer-sphere reorganization energy when the viologen is confined within the hydrophobic CB[8] cavity.

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Research context

OpenAlex topics: Molecular Junctions and Nanostructures · Supramolecular Chemistry and Complexes · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Electroanalytical Chemistry, CAS Center for Excellence in Nanoscience, c/o Engineering Laboratory for Modern Analytical Techniques, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

University of Chinese Academy of Sciences, Beijing 100049, China

Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom

Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom

School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Perth, Western Australia 6009, Australia

Funding

Engineering and Physical Sciences Research Council · Australian Research Council · Directorate-General for Research and Innovation · China Scholarship Council · National Natural Science Foundation of China · Funds for the Construction of Taishan Scholars

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