Tuning Different Kinds of Entangled Networks Formed by Isomers of Bis(1,2,4-triazol-1-ylmethyl)benzene and a Flexible Tetracarboxylate Ligand

In order to tune the Zn(10 coordination polymer architectures, three position isomers, 1,4- (pbtmb), 1,3- (mbtmb), and 1,2-bis(1,2,4-triazol-1-ylmethyl)benzene (obtmb), and flexible tetracarboxylate ligand, 5,5'-(1,4-phenylenebis(methylene))bis(oxy)diisophthalic acid (H4L1), were used to assemble compounds with different kinds of entangled networks, namely, {[Zn-2(Li)(pbtmb)(2)].4H(2)O} (1), {[Zn-2(L-1)(mbtmb)(2)]center dot 4H(2)O}(n)(2), and [Zn2(11)(obtmb)2] (3). Flexible bis(triazole) ligands present diverse conformations in these compounds. Compound 1 shows a 4-fold interpenetrating three-dimensional architecture with 4-connected mog (moganite) topology. Compound 2 displays a 2D + 2D -4 3D polycatenation network simplified as new 4-connected topology with the Schlafli notation of (4,6(4);8}2{4(2),6(4)}. Compound 3 is a 2D polythreading structure, in which two layed networks interpenetrate in a (2D/2D) parallel fashion. The powder X-ray diffraction, thermal stabilities, and the photoluminescence of 1-3 have also been investigated.