Journal
CHEMISTRY OF MATERIALS
Volume 23, Issue 20, Pages 4641-4651Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm2025747
Keywords
coordination polymers; MOFs; porphyrin; cation-containing porous solids; thermally stimulated current; O-2/N-2 separation
Funding
- French ANR 'CONDMOFS' [ANR-07-BLAN-1-203677]
- Alexander von Humboldt foundation
Ask authors/readers for more resources
A new series of 3-D coordination polymers based on iron(III) and nickel(II) tetracarboxylate porphyrin (Ni-TCPP) have been produced using solvothermal conditions. MIL-141(A) solids (MIL stands for Material from Institut Lavoisier), formulated Fe(Ni-TCPP)A center dot-(DMF)(x) (A = Li, Na, K, Rb, Cs, DMF = N,N-dimethylformamide, x similar to 3), are built up from three anionic interpenetrated PtS-type networks charge-balanced by alkali cations (A) entrapped inside the pores. MIL-141(A) thus includes three types of cations, two of which may act as coordinatively unsaturated metal sites (Ni2+ and A(+)). These solids all present a permanent porosity with a reasonably high surface area (S-BET = 510-860 m(2) g(-1)) as well as some structural flexibility toward adsorption/desorption processes, modulated in both cases by the nature of A. Thermally Stimulated Current (TSC) measurements indicated that alkali cations are rather homogeneously distributed within the pores, while their interaction with the framework is stronger in MIL-141(A) than in the analogous cation-containing Faujasites X and Y zeolites. Finally, high pressure adsorption isotherms of N-2 and O-2 were measured. Whereas alkali ion-containing zeolites adsorb selectively N-2 toward O-2, the opposite is observed for MIL-141(A). This result is interpreted in light of the TSC data and the possible preferential interaction of the porphyrinic linker with O-2.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available