Chemical Physics Letters, Vol.595, 167-170, 2014
Conductance of Au/1,4-benzenedicarbothioamide/Au molecular junctions: A proposal for a potential linker
We studied the conductance of Au/1,4-benzenedicarbothioamide (BDTA)/Au junctions at room temperature and measured a single-molecule conductance of BDTA. A carbothioamide (thioamide, -CSNH2) group of this molecule consists of two potential linkers, thioketone and amine groups, and would thus be expected to show high conductance. The experimental single-molecule conductance of BDTA is (0.8-1.0) x 10 (3)G(0) which roughly compares with that of pi-conjugated molecules. We consider that this relatively high conductance of Au/BDTA/Au is due to the homoconjugation of pi-orbitals of benzene and sulfur while the amine group is likely to remain as a side group. We also observed that Au/BDTA/Au junctions can exist in multiple configurations of different conductances. (C) 2014 Elsevier B.V. All rights reserved.