Multicomponent Molecular Conductors with Supramolecular Assemblies Prepared from Neutral Iodine-Bearing pBIB (p-Bis(iodoethynyl)benzene) and Derivatives

摘要

Organic conductors containing supramolecular assemblies have been obtained from the galvanostatic oxidation of donor molecules with iodine-bearing neutral molecules and halide anions.For the obtained single crystals,X-ray crystal structure analyses along with electrical and magnetic measurements were carried out.(ET)_3Br(2,5-BIEP) (ET = bis-(ethylenedithio)tetrathiafulvalene;2,5-BIEP = 2,5-bis(iodoethynyl)pyridine) is isostructural with the prototype compound (ET)_3Br(pBIB) (pBIB = p-bis(iodoethynyl)benzene),whereas (MT)_4X(DFBIB) (MT = bis(methylenedithio)-tetrathiafulvalene;DFBIB = 1,4-difluoro-2,5-bis(iodoethynyl)benzene;X = Br and Cl) and (HMTSF)_4Cl_3(pBIB)_3-(PhCl)_x (HMTSF = hexamethylenetetraselenafulvalene) differ considerably from (ET)_3Br(pBIB) in structure and,consequently,physical properties.The (MT)_4X(DFBIB) system exhibits a novel two-dimensional donor packing,and represents the first example of the charge ordering in molecular conductors containing supramolecular assemblies based on the halogen bond.(HMTSF)_4Cl_3(pBIB)_3(PhCl)_x is characterized by isolated one-dimensional donor columns.