Synthesis, crystal structures and luminescent properties of zinc(II) metal-organic frameworks constructed from terpyridyl derivative ligand

Five zinc(II) metal-organic frameworks, [Zn-3(344-pytpy)(2)Cl-6](n)center dot n(H2O) (1), [Zn(344-pytpy)(ox)](n) (2), [Zn-2(344-pytpy)(bdc)(2)](n)center dot 1.5n(H2O) (3), [Zn-2(344-pytpy)(2) (sfdb)(2)](n)center dot 1.5n(H2O) (4) and [Zn-3(344-pytpy)(2)(btc)(2)](n)center dot 2n(H2O) (5), (344-pytpy=4'-(3-pyridyl)-4.2':6'.4"-terpyridine, H(2)ox=oxalic acid, H(2)bdc= 1,4-benzenedi-carboxylic acid, H(2)sfdb=4,4'-sulfonyldibenzoic acid and H(3)btc=1,3,5-benzene-tricarboxylic acid) have been prepared by hydrothermal reactions. Compound 1 is a 1D chain structure, in which 344-pytpy ligand links three Zn-II centers through three of terminal N-donors. Compound 2 is a 4-connected 3D framework with the dia topological net and the Schlafli symbol of 6(6). Compound 3 displays a unusual 3-fold interpenetrating 3D coordination network which exhibits a new intriguing (3,3,4)-connected topological net with the Schlafli symbol of (4.8(2))(4.8(5))(8(3)). Compound 4 features a two-fold interpenetrating 4-connected 2D framework with the sql topological net and the Schlafli symbol of (4(4).6(2)). Compound 5 is a new self-interpenetrating (3,3,4,4)-connected topological net with the Schlafli symbol of (6.8(2))(2)(6(2).8(2).10.12)(6(2).8(3).10)(2)(6(2).8)(2). The luminescence properties of 1-5 have been investigated by emission spectra and they possess great thermal stabilities which can be stable up to around 400 degrees C. (C) 2014 Elsevier Inc. All rights reserved.