Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Modulation of the Conductance in Platinum(II) Bis(acetylide) Molecules through “Gating” Metal Ion

Abstract

Mononuclear platinum(II) complex trans-Pt(PPh3)2(CCC6H4SMe-4)2 (1-Pt) and its derivatives [PtM(dppm)2(CCC6H4SMe-4)2]+ (dppm = bis(diphenylphosphino)methane; M = Au, 2-PtAu; Ag, 2-PtAg; Cu, 2-PtCu) with “mono-gating” metal ion and [PtM2(dpmp)2(CCC6H4SMe-4)2]2+ (dppm = bis(diphenylphosphinomethyl)phenylphosphine; M = Au, 3-PtAu2; Ag, 3-PtAg2) with “dual-gating” metal ions were elaborately designed to modulate the conductance in platinum(II) bis(-acetylide) complexes through “gating” d10 metal ion. The single-molecule conductance measurements by STM-BJ technique demonstrate that the conductance follows 10-4.5 (1-Pt) > 10-4.8 (2-PtAu) > 10-4.9 (2-PtAg) > 10-5.0 (2-PtCu) > 10-5.1 (3-PtAu2) > 10-5.3 (3-PtAg2) G0. Undoubtedly, charge transport along platinum(II) bis(-acetylide) backbone is progressively restricted with introducing one to two “gating” M ions to mononuclear platinum(II) molecule. As revealed by X-ray crystallography, the “gating” d10 metal ion is substantially bound to the acetylide and in fact the Macetylide bonding is progressively enhanced following AuCacetylide AgCacetylide CuCacetylide, which coincides to a progressive decrease of the conductance according to 10-4.8 (2-PtAu) > 10-4.9 (2-PtAg) > 10-5.0 (2-PtCu) G0. The Macetylide coordination blocks charge transport along platinum(II) bis(-acetylide) backbone so that d10 metal ion behaves as a resistance to suppress the conductance. Theoretical studies confirm that the “gating” metal ions control the HOMO energy, which is lowered by the increased d orbital contribution of “gating” metal ions through Pt-M interactions.

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Apr 2019, accepted on 09 May 2019 and first published on 09 May 2019


Article type: Paper
DOI: 10.1039/C9TC02100K
J. Mater. Chem. C, 2019, Accepted Manuscript

  •   Request permissions

    Modulation of the Conductance in Platinum(II) Bis(acetylide) Molecules through “Gating” Metal Ion

    P. Duan, J. Liu, J. Wang, L. Chen, F. Wang, Q. Zhang, W. Hong and Z. Chen, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C9TC02100K

Search articles by author

Spotlight

Advertisements