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Flexibility in metal-organic framework materials: impact on sorption properties

Fletcher, A.J. and Thomas, K.M. and Rosseinsky, M.J. (2005) Flexibility in metal-organic framework materials: impact on sorption properties. Journal of Solid State Chemistry, 178 (8). pp. 2491-2510. ISSN 0022-4596

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Abstract

Recent years have seen the development of a new class of porous coordination polymers known collectively as metal organic framework materials (MOFs). This review outlines recent progress in understanding how adsorption characteristics of these systems differ from rigid classical sorbents such as activated carbon and zeolites. Gas/vapor adsorption studies for characterization of the porous structures of MOF materials are reviewed and differences in adsorption characteristics based on detailed measurement of equilibrium and dynamical sorption behavior, compared with previous generations of sorbents, are highlighted. The role of framework flexibility and specific structural features, such as windows and pore cavities, within the MOF porous structures are discussed in relation to adsorption mechanisms.