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

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journal contribution
posted on 2011-01-17, 00:00 authored by Zeric Hulvey, Dorina A. Sava, Juergen Eckert, Anthony K. Cheetham
A partially fluorinated metal−organic framework, Zn(bpe)(tftpa)·cyclohexanone [bpe = 1,2-bis(4-pyridyl)ethane; tftpa = tetrafluoroterephthalate], has been synthesized, and its H2 storage properties are reported. The 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 % H2 at 77 K and 1 atm with an adsorption enthalpy (Qst) 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 bind through purely physisorptive methods.