Mesitylene Tribenzoic Acid as a Linker for Novel Zn/Cd Metal-Organic Frameworks.

Three new Metal-Organic Frameworks, containing mesitylene tribenzoic acid as a linker and zinc ( 1 ) or cadmium as metals ( 2 , 3 ), were synthesized through solvothermal reactions, using DMF/ethanol/water as solvents, at temperatures of 80 °C (structures 1 and 3 ) and 120 °C (structure 2 ). Following single-crystal X-ray diffraction, it was found that 1 and 3 crystallize in the P 2 1 / c and C2/ c space groups and form 2D networks, while 2 crystallizes in the Fdd 2 space group, forming a 3D network. All three frameworks, upon heating, were found to be stable up to 350 °C. N 2 sorption isotherms revealed that 1 displays a BET area of 906 m 2 /g. Moreover, the porosity of this framework is still present after five cycles of sorption/desorption, with a reduction of 14% of the BET area, down to 784 m 2 /g, after the fifth cycle. The CO 2 loading capacity of 1 was found to be 2.9 mmol/g at 0 °C.