Tunable RE-fcu-MOFs: a platform for systematic enhancement of CO2 adsorption energetics and uptake

by D.-X. Xue, A.J. Cairns, Y. Belmabkhout, L. Wojtas, Y. Liu, M.H. Alkordi, M. Eddaoudi
Year: 2013 DOI: 10.1021/ja401429x

Extra Information

J. Am. Chem. Soc., 135, no. 20: 7660-7, (2013)


A series of fcu-MOFs based on rare earth (RE) metals and linear fluorinated/non fluorinated, homo/hetero-functional ligands were targeted and synthesized. This particular fcu-MOF platform was selected because of its unique structural characteristics combined with the ability/potential to dictate and regulate its chemical properties (e.g., tuning of the eloectron-rich RE metal ions and high localized charge density, a property arising from the proximal positioning of polarizing tetrazolate moieties and fluoro-groups that decorate the exposed inner surfaces of the confined conical cavities). These features permitted a systematic gas sorption study to evaluate/elucidate the effects of distinctive parameters on CO2−MOF sorption energetics. Our study supports the importance of the synergistic effect of exposed open metal sites and proximal highly localized charge density toward materials with enhanced CO2 sorption energetics.


Hexanuclear molecular building block Rare-earth metals Modulator Cuboctahedral SBU Fcu-MOF Highly porous material Heat of adsorption Water stability Breakthrough CO2 adsorption energetics CO2 capture MOF Metal-organic framework