A Novel 3D Coordination Polymer Bearing Rare NbO-x-d Subnets: Synthesis, Structure, and Properties.

Employing the multicarboxylate and N-donor mixed ligands to react with Zn(NO)·6HO affords a new 3D compound [Zn(HBPTC)(bmp)(HO)]·2HO ( 1) (HBPTC = biphenyl-3,3′,4,4′-tetracarboxylic acid, bmp = 3,6-bis(imidazol-1-yl)pyridazine). Structural analyses show that compound 1 possesses a (4,4)-connected neutral framework bearing rare NbO-x-d subnets, and it represents the first replica of the theoretically predicted NbO-x-d/Im-3m→Imm2 topology net. Moreover, compound 1 can demonstrate the interesting reversible structural transformation property induced by water molecules. Additionally, thermal stability and luminescence properties of 1 were investigated. [ABSTRACT FROM AUTHOR]