A three-dimensional pillared-layer metal-organic framework: Synthesis, structure and gas adsorption studies

作者：Sahu Jhasaketan; Aijaz Arshad; Xu Qiang; Bharadwaj Parimal K^*

来源：Inorganica Chimica Acta, 2015, 430: 193-198.

DOI：10.1016/j.ica.2015.03.011

• Metal-organic framework
• Partially methylated ligand
• CO2 gas adsorption

A stable 3D MOF, {[Zn-3(L)(3)(DPB)(1.5)]center dot 6DMF center dot H2O}(n) was synthesized using a partially methylated linear rigid linker (LH2) in the presence of the co-linker DPB (1,4-dipyridylbenzene) under solvothermal condition. The complex was found to have channels along the crystallographic a-axis with the pore surfaces aligned with -CH3 groups that resulted in a hydrophobic environment inside the cavity. Thermogravimetric analysis and variable temperature powder X-ray diffraction show high thermal stability of the framework. The solvent molecules in the cavity can be evacuated maintaining the structural integrity of the framework to afford a porous structure. Gas (N-2, CH4, CO2 and H-2) adsorptions were carried out for this MOF. The desolvated framework shows significant CO2 adsorption over N-2 and CH4 at 273 K with an isosteric heat of adsorption of similar to 21 kJ/mol, suggesting a strong interaction of the CO2 molecules with the framework walls.

• 出版日期2015-5-1