A series of new mixed-ligand complexes based on 3,6-bis(imidazol-1-yl)pyridazine: syntheses, structures, and catalytic activities

作者：Zhou, Sheng-Bin; Wang, Xin-Fang; Du, Ceng-Ceng; Wang, Duo-Zhi^*; Jia, Dianzeng

来源：CrystEngComm, 2017, 19(23): 3124-3137.

DOI：10.1039/c7ce00394c

• METAL-ORGANIC FRAMEWORK
• N-DONOR LIGANDS
• EFFICIENT HETEROGENEOUS CATALYST
• CD(II) COORDINATION POLYMERS
• CRYSTAL-STRUCTURES
• PHOTOCATALYTIC PROPERTIES
• MAGNETIC-PROPERTIES
• LUMINESCENT PROPERTIES
• 3,3',5,5'-AZOBENZENETETRACARBOXYLIC ACID
• PHOTOLUMINESCENCE PROPERTIES

Seven new mixed-ligand complexes based on L [L = 3,6-bis(imidazol-1-yl) pyridazine], namely, [Ni(L)(2)(SCN)(2)](n) (1), [Cu-5(L)(1,2-BDC)(4)(mu 3-OH)(2)](n) (2), {[Cu-4(L)(2)(1,3-HBDC)(1,3-BDC)(mu 3-OH)(4)]center dot ClO4 center dot 2.6H(2)O}(n) (3), {[Ni(L)(1,4-BDC) H2O]center dot 0.25H(2)O}(n) (4), [Co(L)(1,3,5-H2BTC)(2)H2O](n) (5), {[Cu-2(L)(2,6-PYDC)(2)(H2O) 2]center dot 4.4H(2)O}(n) (6), and {[Co(L)(4,4'-OBA)]center dot 3.725H(2)O}(n) (7) [1,2-benzenedicarboxylic acid (1,2-H2BDC), 1,3benzenedicarboxylic acid (1,3-H2BDC), 1,4-benzenedicarboxylic acid (1,4-H2BDC), 1,3,5benzenetricarboxylic acid (1,3,5-H3BTC), 2,6-pyridine dicarboxylic acid (2,6-H2PYDC), and 4,4'-oxydibenzoic acid (4,4'-H(2)OBA)], have been synthesized by solvothermal reactions. Complexes 1 and 2 possess a two-dimensional (2D) layered structure, and the 2D framework of complex 1 can be rationalized to be a four-connected {4(4)center dot 6(2)} topological sql network, while 2 exhibits a similar topological network with pentanuclear [Cu-5(mu(3)-OH)(2)(mu(2)-COO-)(6)](2+) secondary building units (SBUs). Complex 3 presents an 8-connected sqc3 3D framework based on a chair-shaped [Cu-4(mu(3)-OH)(4)](4+) SBU with a Schlafli symbol of {4(24)center dot 6(4)}. Complex 4 displays a 3D framework with diamondoid topology, which includes L/Ni(II)/L helical chains. Complex 5 features a 1D chain structure formed by L ligands. Complex 6 shows a dinuclear structure, which is arranged into a 1D supramolecular chain by hydrogen-bonding interactions. The 3D framework of 7 presents a 4-connected porous architecture with a Schlafli symbol of {66}, the same as that of complex 4. The powder X-ray diffraction spectra, IR spectra, UV-vis absorption spectra and thermal stabilities of 1-7 have been investigated. Moreover, in the complex-catalyzed homocoupling reaction of 4-substituted aryl iodides, the catalytic activities of 1-7 have also been studied and discussed.

• 出版日期2017-6-21
• 单位中国科学院长春应用化学研究所; 新疆大学