{[Cu(6)(TTTMB)(8)(OH)(4)(H(2)O)(6)]·8(NO(3))·34.5H(2)O}(n) can reversibly transform to {[Cu(6)(TTTMB)(8)I(3)]·9I·26H(2)O}(n) upon a single crystal to single crystal process. The transformation is accompanied by the formation of weak Cu(2+)I(-) interactions and changes in the coordination numbers, as well as modulation in their properties.

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ARTICLEbtmb = 4,4 0 -bis(1,2,4-triazol-1-ylmethyl)bipheny, H 3 BTC = 1,3,5-benzenetricarboxylic acid, and H 2 NDC = 1,2-benzenedicarboxylic acid. The structures and topological analyses of these complexes, along with the influence of the ligands, metal atoms, and pH values on the structures of the MOFs are represented and discussed. The thermal and catalytic properties of these complexes have also been investigated. ' EXPERIMENTAL SECTIONMaterials and Characterization. All chemicals were commercially available and used as purchased. Ligand 4,4 0 -bis(1,2,4-triazol-1ylmethyl)biphenyl (btmb) was prepared according to the literature. 4c IR data were recorded on a BRUKER TENSOR 27 spectrophotometer with KBr pellets in the region 400À4000 cm À1 . Elemental analyses (C, H, and N) were carried out on a Flash EA 1112 elemental analyzer. Powder X-ray diffraction (PXRD) patterns were recorded using Cu KR1 radiation on a PANalytical X'Pert PRO diffractometer. Thermal analyses were performed on a Netzsch STA 449C thermal analyzer at the heating rate 10 °C 3 min À1 in air.

To explore the influence of six structurally different polycarboxylate ligands H 2 L 1 to H 4 L 6 in the system Zn(II)/btmx, six coordination polymers, formulated as 5), and [Zn(btmx)-(H 2 L 6 )] n (6), have been obtained under similar conditions (btmx = 1,4-bis(1,2,4-triazol-1-ylmethyl)-2,3,5,6-tetramethylbenzene, H 2 L 1 = 1,3-benzenedicarboxylic acid, H 2 L 2 = 1,4benzenedicarboxylic acid, H 2 L 3 = 1,3-adamantanedicarboxylic acid, H 2 L 4 = 1,3-adamantanediacetic acid, H 2 L 5 = 4,4′oxidibenzoic acid, and H 4 L 6 = 3,3′,4,4′-benzophenone tetracarboxylic acid). The structure determination reveals that complexes 1 and 4 are two-dimensional (2D) layered networks and exhibit typical (4,4) topological nets. Complex 2 shows an undulating 2D (4,4)-network with 2-fold interpenetration. Complex 3 possesses a three-dimensional (3D) 3-fold interpenetrating 4-connected framework of 6 6 -dia topology. Both 5 and 6 have different 3D interpenetrated motifs generated by 2D → 3D interpenetration. Complex 5 belongs to a 3D framework built from the interpenetration of 2D bilayers in an inclined mode, while 6 involves a parallel interpenetration between the adjacent 2D (4,4) layers. This work markedly indicates that the effect of polycarboxylate ligands is significant in the construction of these networks.