摘要:
Seven new metal-organic frameworks based on 3,4-bis(carboxymethoxy)benzoic acid (H(3)bcba), 3,5-bis (4-pyridyl)-1,2,4-triazolyl (Hbpt) or 4,4'-bipyridyl (4,4'-bipy), named [Sr-3(bcba)(2)(H2O)(3)](n) (1), [Sr (Hbcba)(H2O)(3)](n) (2), [Zn(Hbcba)(H2O)(2)](n) (3), [Zn-3(bcba)(2)(Hbpt)(2)(H2O)(2)]. (4), [Zn-3(bcba)(2)(4,4'-bipy)(2)]n center dot nH(2)O (5), [Eu(bcba)(H2O)](n)center dot nH(2)O (6) and [Nd(bcba)(H2O)](n)center dot nH(2)O (7), have been successfully synthesized via hydrothermal reaction. Single crystal X-ray diffraction reveals that complexes 1, 3, 4 have one-dimensional (1D) zigzag chains, while the rest are composed of 1D double chains. The 3D network in complex 2 and 3 is formed by hydrogen bonds. Complex 4 constitutes a (3,3,4)-connected network and complex 5 constitutes a (4,5,6) -connected network. Complex 6 and 7 are isomorphous. In addition, the thermogravimetric analyses (TGA) for complexes 1-6 are discussed, and the luminescent properties of complex 3-6 have been also investigated. (C) 2017 Elsevier Ltd. All rights reserved.