标题：Comparison of the effect of functional groups on gas-uptake capacities by fixing the volumes of cages A and B and modifying the inner wall of cage C in rht-type MOFs
作者：Zhao, X.L.;Yuan, S.;Feng, S.;Cao, R.;Yuan, D.;Wang, S.;Dou, J.;Sun, D.
作者机构：[Zhao, X.L] Key Lab. for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jin 更多
通讯作者地址：[Yuan, DQ]Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China.
来源：Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics
摘要：Three porous (3,24)-connected rht-type metal-organic frameworks (MOFs), [Cu _3L(H _2O) _3]xsolvents (H _6L ~(OH) = 4,4′,4″-(hydroxysilanetriyl)tris- (triphenyl-3,5-dicarboxylic acid), SDU-6; H _6L ~(Me) = 4,4′,4″-(methylsilanetriyl)tris-(triphenyl-3,5-dicarboxylic acid), SDU-7; H _6L ~(iBu) = 4,4′,4″-(isobutylsilanetriyl) tris-(triphenyl-3,5-dicarboxylic acid), SDU-8), have been successfully prepared from [Cu _2(COO) _4] paddlewheel SBUs (secondary building units) and C _3-symmetric Sibased hexatopic carboxylatelinkers. All porous MOFs are constructed from 3D packing of nanosized cuboctahedral, truncated tetrahedral, and truncated octahedral cages. SDU-6-8 differ only in the functionality of the central Si atom of the hexacarboxylate ligands with hydroxyl, methyl, and isobutyl groups, respectively. Gas adsorption measurements of activated MOFs suggested that decoration of the cage walls with strong polar groups can enhance the adsorption capacities for N _2, H _2, and CH _4. SDU-6 with -OH as the functional group possesses high CH _4 uptake (172 cm ~3 cm ~(-3) at 35 bar), which is very close to DOE target of 180 cm ~3 cm ~(-3).