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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Increase of network hydrophilicity from sql to lvt supramolecular isomers of Cu-MOFs with the bifunctional 4-(3,5-dimethyl-1H-pyrazol-4-yl) benzoate linker
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Increase of network hydrophilicity from sql to lvt supramolecular isomers of Cu-MOFs with the bifunctional 4-(3,5-dimethyl-1H-pyrazol-4-yl) benzoate linker

机译:将网络亲水从SQL与双官能4-(3,5-二甲基-1H-吡唑-4-基)的Cu-MOF的LVT超分子异构体的增加。苯甲酸盐接头

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The bifunctional linker 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid (H-2 mpba) was used for the synthesis of new (square lattice) sql 2D metal-organic frameworks (MOFs) [Cu(Hmpba)(2)]center dot L (L = DMF or ACN) in a solvent-mixture of dimethylformamide/water and acetonitrile/water. These sql 2D MOFs are supramolecular isomers of the lvt 3D network [Cu(Hmpba)(2)]center dot 4MeOH center dot 1H(2)O (lvt-MeOH) that was synthesized previously by Richardson and co-workers. All these frameworks are potentially porous structures with solvent molecules included in the channels of the as synthesized materials. After activation all three materials showed good CO2 adsorption capacity, demonstrated here for lvt-MeOH for the first time, with a saturation uptake of 113 cm(3) g(-1) (lvt-MeOH-act.), 111 cm(3) g(-1) (sql-DMF-act.) and 90 cm(3) g(-1) (sqlACN-act.) at 195 K. The flexibility of the lvt-MeOH-act. network is evidenced by a gate-opening effect seen in the CO2 measurement at 195 K and under gravimetric high-pressure CO2 adsorption. According to the water and ethanol sorption measurements the new sql frameworks can be categorized as hydrophobic materials in contrast to the hydrophilic lvt framework. In the lvt-MeOH structure the crystal solvent can be replaced with water to yield the structurally authenticated water-only network lvt-H2O containing 3D arrays of S-4-symmetric (H2O)(20) clusters.
机译:双官能连接子的4-(3,5-二甲基-1H-吡唑-4-基)苯甲酸(H-2 MPBA)用于新的(正方形晶格)的合成中的SQL 2D金属 - 有机骨架(MOF)的Cu (HMPBA)(2)]中央点L(L = DMF或ACN)在二甲基甲酰胺/水和乙腈/水的溶剂混合物中。这些SQL 2D MOF是LVT 3D网络的超分子异构体[Cu(HMPBA)(2)]中心点4Meoh中心点1H(2)O(LVT-MeOH),其先前由Richardson和Co-Worker合成。所有这些框架都是具有包含在作为合成材料的通道中的溶剂分子的多孔结构。激活后,所有三种材料都显示出良好的CO 2吸附能力,此处首次用于LVT-MeOH,饱和摄取为113cm(3 )g(-1)(Lvt-MeOH-Act。),111厘米(3 )G(-1)(在195 K.所述LVT - 甲醇幕的灵活性SQL-DMF-行为。)和90厘米(3)克(-1)(sqlACN-ACT)。在195 k和重量高压CO2吸附下,通过CO2测量中看到的浇口开启效果证明了网络。根据水和乙醇吸附测量,与亲水性LVT框架相比,新的SQL框架可以分类为疏水材料。在LVT-MeOH结构中,晶体溶剂可以用水替换,得到含有S-4 - 对称(H2O)(20)簇的3D阵列的结构上验证的水网络LVT-H2O。

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