Alkaline cation directed structural diversity of cubic-cage-based cobalt(II) metal-organic frameworks: from pcu to bct net

作者：Zou, Ji-Yong^*; Shi, Wei; Zhang, Jing-Ya; He, Yan-Fei; Gao, Hong-Ling; Cui, Jian-Zhong; Cheng, Peng

来源：CrystEngComm, 2014, 16(30): 7133-7140.

DOI：10.1039/c4ce00597j

• 1H-1,2,3-TRIAZOLE-4,5-DICARBOXYLIC ACID SYNTHESES
• CRYSTAL-STRUCTURES
• COORDINATION POLYMERS
• KAGOME LATTICE
• LUMINESCENT
• STABILIZATION
• ADSORPTION
• SEPARATION
• ASSEMBLIES
• POROSITY

Three 2p-3d heterometallic cubic-cage-based metal-organic frameworks (MOFs), formulated as {[H2N(CH3)(2)](9)(H3O)(6)[Co(H2O)(6)][Co8Li3(TDA)(12)]center dot 14H(2)O}(n) (1), {(H3O)(15)[Co(H2O)(6)][Co8Li3(TDA)(12)]center dot 10H(2)O}(n) (2) and {[H2N(CH3)(2)](H3O)(16)[Co8K5(mu(2)-O)(TDA)(12)(H2O)(2)]center dot 10H(2)O}(n) (3) (H(3)TDA = 1H-1,2,3-triazole-4,5-dicarboxylic acid), have been successfully synthesized and structurally characterized in detail. In these 2p-3d heterometallic cubic-cage-based MOFs, eight Co2+ cations as the vertexes are interconnected by twelve TDA(3-) ligands as the edges to form an unusual [Co-8(TDA)(12)](20-) cubic cage with edges of 6.12 angstrom, in which a hexahydrated Co2+ ion is captured for 1 and 2. The neighboring [Co-8(TDA)(12)](20-) cubic cages are further bridged by Li+ ions for 1 and 2 and K+ ions for 3 to give 3D 6-connected pcu nets for 1 and 2 and a 10-connected bct net for 3. The magnetic properties of 1-3 were studied in detail.

• 出版日期2014
• 单位南开大学; 天津大学