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Issue 6, 2013
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Electrical conductance study on 1,3-butadiyne-linked dinuclear ruthenium(ii) complexes within single molecule break junctions

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Abstract

Single-molecule conductance of three sulphur-functionalized organometallic wires with two ruthenium(II) centres spaced by 1,3-butadiyne was firstly investigated using an electrochemically assisted-mechanically controllable break junction (EC-MCBJ) approach. It is demonstrated that single-molecular conductance of these diruthenium(II) incorporated systems is significantly higher than oligo(phenylene-ethynylene) (OPE) having comparable lengths and exhibits weaker length dependence. The conductance improvement in these diruthenium(II) molecules is ascribable to the better energy match of the Fermi level of gold electrodes with the HOMO that is mainly resident on the Ru–C[triple bond, length as m-dash]C–C[triple bond, length as m-dash]C–Ru backbone. Furthermore, modulation of molecular conductance is achieved by changing the length and π-conjugated system of the chelating 2,2′:6′,2′′-terpyridyl ligand.

Graphical abstract: Electrical conductance study on 1,3-butadiyne-linked dinuclear ruthenium(ii) complexes within single molecule break junctions

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Article information


Submitted
02 Feb 2013
Accepted
18 Mar 2013
First published
18 Mar 2013

Chem. Sci., 2013,4, 2471-2477
Article type
Edge Article

Electrical conductance study on 1,3-butadiyne-linked dinuclear ruthenium(II) complexes within single molecule break junctions

H. Wen, Y. Yang, X. Zhou, J. Liu, D. Zhang, Z. Chen, J. Wang, Z. Chen and Z. Tian, Chem. Sci., 2013, 4, 2471
DOI: 10.1039/C3SC50312G

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