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Single-molecule conductance studies of organometallic complexes bearing 3-thienyl contacting groups

AutorBock, Sören; Osorio, Henrry M.; Nichols, Richard J.; Higgins, Simon J.; Cea, Pilar; Martín, Santiago; Lambert, Colin J.; Low, Paul J.
Fecha de publicación2017
EditorWiley-VCH
CitaciónChemistry - A European Journal 23(9): 2133-2143 (2017)
ResumenThe compounds and complexes 1,4-CH(C≡C-cyclo-3-CHS) (2), trans-[Pt(C≡C-cyclo-3-CHS)(PEt)] (3), trans-[Ru(C≡C-cyclo-3-CHS)(dppe)] (4; dppe=1,2-bis(diphenylphosphino)ethane) and trans-[Ru(C≡C-cyclo-3-CHS){P(OEt)}] (5) featuring the 3-thienyl moiety as a surface contacting group for gold electrodes have been prepared, crystallographically characterised in the case of 3–5 and studied in metal|molecule|metal junctions by using both scanning tunnelling microscope break-junction (STM-BJ) and STM-I(s) methods (measuring the tunnelling current (I) as a function of distance (s)). The compounds exhibit similar conductance profiles, with a low conductance feature being more readily identified by STM-I(s) methods, and a higher feature by the STM-BJ method. The lower conductance feature was further characterised by analysis using an unsupervised, automated multi-parameter vector classification (MPVC) of the conductance traces. The combination of similarly structured HOMOs and non-resonant tunnelling mechanism accounts for the remarkably similar conductance values across the chemically distinct members of the family 2–5.
DescripciónThis is an open access article under the terms of the Creative Commons Attribution License.-- et al.
Versión del editorhttps://doi.org/10.1002/chem.201604565
URIhttp://hdl.handle.net/10261/148696
DOI10.1002/chem.201604565
Identificadoresdoi: 10.1002/chem.201604565
e-issn: 1521-3765
issn: 0947-6539
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