Ligand effects on charge transport in platinum(II) acetylides

Schull, Terence L. ; Kushmerick, James G. ; Patterson, Charles H. ; George, Clifford ; Moore, Martin H. ; Pollack, Steven K. ; Shashidhar, Ranganathan (2003) Ligand effects on charge transport in platinum(II) acetylides Journal of the American Chemical Society, 125 (11). pp. 3202-3203. ISSN 0002-7863

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja029564o

Related URL: http://dx.doi.org/10.1021/ja029564o

Abstract

To investigate the electrical characteristics of organometallic complexes as molecular conductors, organometallic π-conjugated molecules of the type trans-[PtL2(CCC6H4SAc-4)2], where L=PCy3, PBu3, PPh3, P(OEt)3, P(OPh)3, were synthesized and characterized by NMR, IR, UV, and X-ray spectroscopies. For the three complexes (L=PCy3, PPh3, and P(OEt)3) that could be measured using a cross-wire junction technique, the current-voltage (I-V) characteristics of a molecular monolayer of these complexes showed no ligand effect, despite spectroscopic evidence that electronic interaction between the phosphine ligands and the π-system does occur. It was concluded that the tunneling efficiency across the molecule is the determining factor for conduction in this metal-molecule-metal system. It was also shown that the incorporation of a transition metal in π -conjugated molecular wires does not adversely affect charge transport compared to all-carbon π -conjugated molecular wires.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:49485
Deposited On:20 Jul 2011 09:52
Last Modified:20 Jul 2011 09:52

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