An unprecedented 3D manganese(II) MOF displaying (4,5)-connected xah topology

An unusual 3D manganese(II) coordination polymer based on the flexible bis(benzimidazole) ligand, namely, [Mn(L)(ndc)](n) (L= 1,4-bis(5,6-dimethylbenzimidazol-1-ylmethyl)benzene, H(2)ndc = 2,6-naphthalenedicarboxylic acid), was synthesized and characterized by IR, elemental analysis, thermal gravimetric and single-crystal X-ray diffraction. The complex exhibits an unprecedented three-fold interpenetrating xah architecture with a (4,5)-connected (4(2).6(2),8(2))(4(6).6(4)) topology, which represents the first binodal (4,5)-connected xah network observed incoordination polymers. The fluorescence and catalytic properties of the complex for the degradation of the Congo red dye in a photo-Fenton-like process were investigated. (C) 2015 Elsevier B.V. All rights reserved.