Hydrogen Storage in a Highly Interpenetrated and Partially Fluorinated Metal-Organic Framework

A partially fluorinated metal organic framework, Zn(bpe)(tftpa)center dot cyclohexanone [bpe = 1,2-bis(4-pyridyl)ethane; tftpa = tetrafluoroterephthalate], has been synthesized, and its H(2) storage properties are reported. Tie structure is highly interpenetrated yet contains templating cyclohexanone molecules, which can be easily removed to give a porous material with fluorine atoms exposed to the pore surface. The material adsorbs 1.04 wt % H(2) at 77 K and 1 atm with an adsorption enthalpy (Q(st)) of 6.2 kJ/mol, which represents a slight enhancement in the binding strength due to the presence of fluorine atoms over comparable metal organic frameworks, which bird through purely physisorptive methods.