title: Gas storage in a partially fluorinated highly stable three-dimensional porous metal-organic framework.
abstract: A partially fluorinated linear rigid linker, 2,2'-bis-trifluoromethyl-biphenyl-4,4'-dicarboxylic acid (H2bfbpdc), has been synthesized. This linker forms a porous three-dimensional (3D) metal-organic framework, {[Zn4O(bfbpdc)3(bpy)0.5(H2O)]·(3DMF)(H2O)}n (1), in the presence of the colinker 4,4'-bipyridine (bpy) and Zn(NO3)2·6H2O under solvothermal condition. Single crystal X-ray analysis shows that 1 contains a 3D channel structure with highly polar pore surfaces decorated with pendant trifluoromethyl groups of bfbpdc(2-) linker. Thermogravimetric analysis (TGA) and variable temperature powder X-ray diffraction (VTPXRD) exhibit high thermal stability of the framework. The solvent molecules present in the voids can be removed by heating, maintaining the integrity of the structure to afford a porous framework. Gas (N2, H2, CH4, and CO2) and water adsorption studies were performed on this framework.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Kanpur, 208016, India.
authors.forename: Atanu
authors.initials: A
authors.lastname: Santra
authors.forename: Irena
authors.initials: I
authors.lastname: Senkovska
authors.forename: Stefan
authors.initials: S
authors.lastname: Kaskel
authors.forename: Parimal K
authors.initials: PK
authors.lastname: Bharadwaj