| The Metal-Organic Frameworks have won more and more concentration and developed quickly, as they’re tend to be used widely.The work of our team mainly focus on the MOFs which are constructed by multicarboxylic acids.9 new Metal-Organic Frameworks were constructed by ligands which contain element N or S.In the first part,two microporous MOFs [Cd(cptpy)2·(DMF)2]n(2-1) [Cd(cptpy)(Ac)(H2O)·(DMA)(H2O)]n(2-2)(Hcptpy=4-(4-carboxyphenyl)-2,2’:4’,4"-terpyr idine) were synthesized under different reaction conditions,which formed by Hcptpy ligand and Cd2+.2-1 is a noninterpenetrating (3,5)-connected 2D framework, while complex 2-2 is a double-interpenetrating 3D network with ths topology. The BET surface areas estimated from the CO2 adsorption isotherm is 151.12 and 90 m2·g-1 for 2-1 and 2-2, respectively. Therefore, the distinct difference of adsorption capacity between CO2 and N2 were found for both 2-1 and 2-2. We conclude that 2-1 and 2-2 may have potential application in the separation of CO2/N2 mixtures. Besides, complexes 2-1 and 2-2 have highly selective adsorption of H2O over CH3OH.In the following part of this work, three different metal-organic frameworks were formed by H3BTTC acid. In [Cu2(BTTC)4/3·(H2O)]n(3-1),2 Cu2+ and 4 carboxylates groups are attached to form a typical paddle-wheel [Cu2(OCO)4] secondary building unit (SBU).3-1 is a multi-functioned microporous sorption material. The BET area of 3-1 is 1490.7 m2·g-1 and the average diameter of the poe is 1.8209 nm. The hydrogen adsorption isotherm indicates an uptake of 81.81 cm3·g-1(～0.73 wt%) at 77 K and 51.85 cm3·g-1(～0.46 wt%) at 87 K and 1 atm. The high value of Qst(～6.92 kJ·mol-1) at 77 K demonstrates strong interactions between H2 and the host framework, suggesting that 3-1 is a promising materials for gas storage.As for 3-2,4 Cd atoms are bridged by eight carboxylates to form the rare square-planar tetranuclear Cd secondary building unit (SBU). Each SBU connects eight bttc3- ligands, and each bttc3" binds three SBUs to form a twisted truncated-octahedral cage. As a result, a rare nanoporous compound [Cd3(BTTC)2·3(H2O)]n(3-2) with a cavity of 11.05×8.62 A2 was constructed. [Mn3(BTTC)2·(bix)4·(H2O)2]n (3-3) is a 3D-net constructed by Mn2+and BTTC3- and ligand bix.Thirdly, three 3D-networks complexes were formed by H2pbdc acid.The size of pore in [Ni2(pbdc)2·(H2O)3]n(4-1) is 10.419×10.419 A2. The solvent-accessible volume is 40.8%(1699.0 A3) per unit cell (4162.0 A3) in 4-land 39.7%(2562.7 A3) per unit cell (6540.2 A3) in [Ni6(pbdc)6·(DMA)2·(H2O)7-pridine]n(4-2) calculated using PLATON. [Co2(pbdc)2·(bimb)2.5·(DMF)2]n (4-3) is a double interpenetrating 3D framework and the porous in it is occupied by some unparticipated ligand bimb and solvent molecules; [Zn(pbdc)2·(bimb)(DMA)]n (4-4) is a tetra-interpenetrating 3D framework with high symmetry. Notbly,4-4 display strong photoluminescence. |
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