title: Two new metal-organic frameworks based on tetrazole-heterocyclic ligands accompanied by in situ ligand formation.
abstract: Based on the same in situ formed ligand, two new MOFs, namely {[Zn2(HL)2]·0.5DMF·H2O}n(1) and {[Cd2(HL)2]·1.5H2O}n(2) (H3L = 5-[(2H-tetrazol-5-yl)amino]isophthalic acid), have been solvothermally synthesized and structurally characterized by elemental analysis, IR, PXRD, and single-crystal X-ray diffraction. During the self-assembly process, the original ligand H2ATBDC (5-(5-amino-1H-tetrazol-1-yl)-1,3-benzenedicarboxylic acid) undergoes the Dimroth rearrangement to form a new ligand H3L, consequently contributing to the construction of the two new MOFs. Structural analysis reveals that both 1 and 2 possess a three-directional intersecting channel system and pts topology. The major structural difference between them is the metal coordination, which displays four- and six-coordinated modes in 1 and 2, respectively, and results in diverse channels and different stabilities. Moreover, the adsorption properties of 1a (i.e., the desolvated 1) have been studied, and the results show that 1a possesses moderate capability of gas sorption for N2, CO2, and CH4gases, along with high selectivity ratios of 102 and 20 for CO2/N2(15 : 85) and CO2/CH4(50 : 50) at 273 K, respectively.
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn.
authors.forename: Qin
authors.initials: Q
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn.
authors.forename: Mei-Hui
authors.initials: MH
authors.lastname: Yu
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn.
authors.forename: Ai-Lin
authors.initials: AL
authors.lastname: Li
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China.
authors.forename: Tong-Liang
authors.identifier: http://orcid.org/0000-0001-9619-9867
authors.initials: TL
authors.lastname: Hu
authors.affiliation: School of Materials Science and Engineering, National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300350, China. tlhu@nankai.edu.cn and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China.
authors.forename: Xian-He
authors.identifier: http://orcid.org/0000-0002-2646-7974
authors.initials: XH
authors.lastname: Bu