Parshamoni Srinivasulu, Sanda Suresh, Jena Himanshu Sekhar, Konar Sanjit
Department of Chemistry, IISER Bhopal, Bhopal, Madhya Pradesh-462066, India.
Dalton Trans. 2014 May 21;43(19):7191-9. doi: 10.1039/c4dt00228h. Epub 2014 Mar 28.
A new 2D pillared-bilayer flexible open metal organic framework {[Cu(tdc)(bpe)]n·2n(H2O)·n(MeOH)} (compound 1) [H2tdc = 2,5 thiophenedicarboxylic acid; bpe = 1,2-bis(4-pyridyl)ethane] has been synthesized through a solvent diffusion technique and structurally characterized. The structure analysis reveals that the tdc ligands formed bilayers with the Cu(II) ions along the b-direction and the layers are further pillared by bpe linkers and resulted in a 2D pillared-bilayer porous framework with a four connected uninodal sq1/Shubnikob tetragonal plane net with the Schälfli symbol {4(4)·6(2)}. The framework is enclosed with large square shaped channels (13.7 × 8.35 Å(2)) along the bc-plane and the channels are occupied by guest solvent molecules. The adsorption studies reveal that compound 1 shows selective adsorption for CO2 over CH4 at room temperature and it also shows hysteretic sorption for a few protic solvents (H2O and EtOH) and a Type-1 isotherm for an aprotic solvent (CH3CN). The catalytic performance of compound 1 for Glaser type homo-coupling reactions has also been reported.
一种新型的二维柱状双层柔性开放金属有机框架{[Cu(tdc)(bpe)]n·2n(H2O)·n(MeOH)}（化合物1）[H2tdc = 2,5-噻吩二甲酸；bpe = 1,2-双(4-吡啶基)乙烷]已通过溶剂扩散技术合成并进行了结构表征。结构分析表明，tdc配体与Cu(II)离子沿b方向形成双层结构，这些层进一步由bpe连接体支撑，形成了一个二维柱状双层多孔框架，具有一个四连接单节点sq1/舒布尼科夫四方平面网，其施莱夫利符号为{4(4)·6(2)}。该框架沿bc平面被大的方形通道（13.7×8.35 Å(2)）包围，通道中存在客体溶剂分子。吸附研究表明，化合物1在室温下对CO2的吸附选择性高于CH4，并且对一些质子性溶剂（H2O和EtOH）表现出滞后吸附，对非质子性溶剂（CH3CN）表现出I型等温线。还报道了化合物1对格拉泽型均偶联反应的催化性能。
