Metallosupramolecular polymer generated from a N,N,O-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) ligand possessing terminal pyridyl units

Abstract

The synthesis and characterisation of a new (1,2,3-triazol-4-yl)-picolinamide (tzpa) ligand HL1 is described, achieved in three steps from commercially available starting materials. This ligand, possessing two terminal pyridyl units, was used in the generation of a copper-based coordination polymer formed in CH3OH using [Cu(CH3CN)4](CF3SO3). The polymer, poly-[Cu3(L1)2(CF3SO3)(OCH3)(H2O)](CF3SO3)2, is the first example of the use of an unsymmetric triply-bridging tzpa in coordination chemistry, giving a coordination polymer through in situ oxidation of Cu(I) to Cu(II) coupled with deprotonation of the tzpa ligand to the anionic L1−