Hydroxamate based transition metal–organic coordination polymers with semiconductive properties†
In addition to carboxylate and N-donor linkers, hydroxamates are a kind of new emerging ligand to form coordination polymers. However, owing to the difficulty in controlling the reversible formation of strong metal–hydroxamate coordination bonds, reports on ditopic or multitopic hydroxamate coordination polymers are rare. In this work, we combined the ligand H2ONDI, a bis-hydroxamate with a naphthalenediimide (NDI) core and rigid chelating groups, with transition metal ions (Mn2+ and Cd2+) and thus obtained three new hydroxamate coordination polymers. Benefiting from π–π stacking interactions between neighbouring ligands, Mn-ONDI-1 and CdCl-ONDI show interesting electrical conductivities.