Two non-interpenetrating 3D coordination networks with (3,4)-connected topologies

Two new coordination polymers, namely [Zn-3(1,3,5-BTC)(2)(L-1)(2)(H2O)(2)] center dot 2H(2)O (1) and [Cd-3(1,2,3-BTC)(2)(L-2)(3)] H2O (2) (where L-1 = 1,2-bis(imidazol-1-ylmethyl)benzene, L-2 = 1,1'-(1,4-butanediyl)bis(imidazole), 1,3,5-H3BTC = 1,3,5-benzenetricarboxylic acid and 1,2,3-H3BTC = 1,2,3-benzenetricarboxylic acid), were synthesized in hydrothermal conditions. In 1, each 1,3,5-BTC anion coordinates to three Zn cations, and the framework of 1 can be simplified as (6 center dot 8 center dot 10)2(6(2) center dot 8 center dot 10(3))(8(2) center dot 10)(6(2) center dot 10) topology. In 2, 1,2,3-BTC anions coordinate to three cadmiums, and the whole structure displays a (6(2) center dot 8(4))2(6(4) center dot 8 center dot 10)(6(2) center dot 8)(2) network containing three different types of nodes. The luminescent properties for 1 and 2 are discussed.