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Durham University

Institute of Medieval and Early Modern Studies (IMEMS)

Staff and Governance

Core Staff

The day-to-day running of IMEMS is the responsibility of the Core Executive Committee, comprising the Director and Associate Directors and the Administrator. 

Publication details for Prof. Andrew Beeby

Davidson, R., Liang, J.H., Milan, D.C., Mao, B.W., Nichols, R.J., Higgins, S.J., Yufit, D.S. Beeby, A. & Low, P.J. (2015). Synthesis, Electrochemistry, and Single-Molecule Conductance of Bimetallic 2,3,5,6-Tetra(pyridine-2-yl)pyrazine-Based Complexes. Inorganic Chemistry 54(11): 5487-5494.

Author(s) from Durham

Abstract

The ligands 4′-(4-(methylthio)phenyl)-2,2′:6′,2″-terpyridine (L1), 4′-((4-(methylthio)phenyl)ethynyl)- 2,2′:6′,2″-terpyridine (L2), and bis(tridentate) bridging ligand 2,3,5,6-tetra(pyridine-2-yl)pyrazine (tpp) were used to prepare the complexes [Ru(L1)2][PF6]2 ([1][PF6]2, [Ru(L2)2][PF6]2 ([2][PF6]2), [{(L1)Ru}(μ-tpp){Ru(L1)}][PF6]4 ([3][PF6]4), and [{(L2)Ru}(μ-tpp){Ru(L2)}][PF6]4 ([4][PF6]4). Crystallographically determined structures give S···S distances of up to 32.0 Å in [4]4+. On the basis of electrochemical estimates, the highest occupied molecular orbitals of these complexes fall between −5.55 and −5.85 eV, close to the work function of clean gold (5.1–5.3 eV). The decay of conductance with molecular length across this series of molecules is approximately exponential, giving rise to a decay constant (pseudo β-value) of 1.5 nm–1, falling between decay factors for oligoynes and oligophenylenes. The results are consistent with a tunnelling mechanism for the single-molecule conductance behavior.


Full Executive Committee

Our Full Executive Committee is made up of the Core Executive Committee, listed above, plus a number of executive members including:


International Advisory Board

We are extremely fortunate to have be able to call on the help and guidance of colleagues from around the world who help to shape and guide our direction, strategy and international reach. Our current Advisory Board members are: