A series of coordination polymers based on terphenyl tetracarboxylates and bis-pyridyl ligands with water vapor sorption properties

作者：Li, Ling; Lv, Lei; Huang, Ru-Dan^*

来源：RSC Advances, 2017, 7(2): 975-984.

DOI：10.1039/c6ra25319a

• METAL-ORGANIC FRAMEWORKS
• HIGH METHANE STORAGE
• SINGLE-CRYSTAL
• CARBON-DIOXIDE
• GAS SORPTION
• LUMINESCENCE
• ACID
• TRANSFORMATION
• FLUORESCENCE
• ADSORPTION

Six new coordination polymers, namely, {[Mn-2(L1)(bpfp)(H2O)(2)]center dot 6H(2)O center dot(CH3OH)}(n) (1), {[Mn-4(m(3)O)(2)(L1)(2)(bpe)(2)(H2O)(2)]center dot 2H(2)O}(n) (2), [Ni(HL1)(Hbpmp)(H2O)(2)](n) (3), [Co-2(mu(2)-OH)(HL1)(bpmp)(H2O)(4)](n) (4), {[Co-2(L2)(bpfp)(H2O)(2)]center dot 4H(2)O}(n) (5), {[Co-2(L2)(2)(bpe)(2)(H2O)(2)center dot 2H(2)O]center dot(NH4)(4)}(n) (6) (H-4 L1 = [1,1': 4',1 ''-tephenyl]-2,2 '',5,5 ''-tetracarboxylic acid, H(4)L2 = [1,1': 40',1 ''-terphenyl]-3,3 '',5,5 ''-tetracarboxylic acid, bpfp = bis(4-pyridylformyl) piperazine, bpe = 1,2-bis(pyridin-4-yl) ethane and bpmp = N,N'-bis(4-pyridyl) piperazine) were synthesized under hydrothermal conditions by terphenyl tetracarboxylates, bis-pyridyl ligands and transition metal salts. These six complexes were characterized by elemental analysis, infrared (IR) spectroscopy, thermogravimetric analysis (TGA), single-crystal X-ray diffraction, powder X-ray diffraction (PXRD) and fluorescence spectroscopy. Complexes 1 and 5 possess three-dimensional (3D) (4,6)-connected networks with {4(3).6(3)} 2{4(6).6(6).8(3)} and {4(4).6(10).8} {4(4).6(2)} topologies, respectively. Complexes 2-4 and 6 feature two-dimensional (2D) networks, which are expanded into 3D supramolecular frameworks via hydrogen bonding interactions. Desorption of lattice water molecules in complexes 1 and 2 was analyzed, and the values of water vapor uptake are 15.17 mL g(-1) and 27.24 mL g(-1), respectively.

• 出版日期2017
• 单位北京理工大学