Electrochemical deposition of a semiconducting gold dithiolene complex with NIR absorption

Abstract

The synthesis of a new anionic gold dithiolene complex, NBu4·[trans-1], and that of its corresponding neutral gold complex 2 is reported. Complex 2 shows strong absorption into the IR, semiconductivity...

The quest for single component molecular metals within neutral transition metal complexes

“…The semiconducting behaviour remains even under 2 GPa. 134 In the [Ni(4-pedt) 2 ] (4-pedt: 1-(pyridine-4-yl)-ethylene-1,2dithiolate, Chart 3), 135 the crystal structure is composed of stacks organised in a head-to-tail pattern. The pyridine groups are in a trans configuration and with different degrees of rotation out of the plane of the bis(1,2-dithiolene) core (Fig.…”

A highly conducting mixed-valence nickel bis(dithiolene) salt [Et4N][Ni(Me-thiazSe-dt)2]2 with selone substitution

“…In the field of molecular conductors, 1 the variability offered by organic chemistry gives endless possibilities to modify at will the electroactive molecules, be they organic donor or acceptor molecules or metal complexes with chemical variations on the nature and number of ligands. In that respect, square-planar metal bis(dithiolene) complexes 2,3 provide a huge playfield as the two R 1 and R 2 substituents on the MS 2 C 2 R 1 R 2 metallacycles can be engineered to control their shape and symmetry, particularly if R 1 ≠ R 2 , 4,5 or if R is chiral, 6,7 but also their HOMO/LUMO energies and HOMO–LUMO gap 8 (and associated optical properties in the NIR), 9,10 the extend of intermolecular interactions such as the S⋯S overlap interactions but also hydrogen 11 or halogen 12 bonding interactions. The most successful complex in these series are the [M(dmit) 2 ] ones (Chart 1, dmit: 1,3-dithiole-2-thione-4,5-dithiolate), which provided a large number of mixed-valence conducting (and even superconducting) salts, 2,5 when associated with closed-shell (ammonium, phosphonium, sulfonium, …) or open-shell (tetrathiafulvalenium, ferricenium, …) cations.…”