Tuning the structural topologies of two luminescent metal-organic frameworks through altering auxiliary ligand

Two new metal-organic frameworks, [Zn-2(FA)(2)(bix)(2)](n) center dot 3nH(2)O (1) and [Zn(FA)(bib)](n) (2), (H(2)FA = fumaric acid, bix = 4,4'-bis(imidazol-1-ylmethyl)benzene, bib = 1,4-bis(imidazolyl)butane), have been synthesized by combining the fumaric acid and flexible imidazole-based ligands with Zn(II) salts under hydrothermal conditions. Single-crystal X-ray diffraction analysis reveals that 1 is a 4-fold interpenetrated unc topological net, and 2 is a 5-fold interpenetrated dia topological net. Moreover, the luminescent properties of the two compounds were also investigated in the solid state at room temperature. Crown Copyright (c) 2013 Published by Elsevier B.V. All rights reserved.