Highly Efficient I₂ Sorption, CO₂ Capture, and Catalytic Conversion by Introducing Nitrogen Donor Sites in a Microporous Co(II)-Based Metal–Organic Framework

Abstract

Recently, the development of porous absorbents for efficient CO 2 and I 2 capture has attracted considerable attention because of severe global climate change and environmental issues with the nuclear energy. Hence, a unique porous metal−organic framework (MOF), {[Co(L)]•DMF•2H 2 O} n (1, DMF = N,N-dimethylformamide) with uncoordinated N atoms was rationally constructed via using a heterofunctional 4,6-bis(4′-carboxyphenyl)pyrimidine (H 2 L) linker. Interestingly, 1 exhibits exceptional properties for I 2 sorption, CO 2 capture, and catalytic conversion. Particularly, I 2 can be efficiently removed in both vapor and solution forms, and the adsorption amount can reach 676.25 and 345.28 mg g −1 , respectively. Furthermore, complex 1 displays high adsorption capacity for CO 2 (53.78 cm 3 g −1 , 273 K). Consequently, 1 is expected to be a promising and practical material for environmental purification due to its excellent adsorption properties.

A Three-Blade-Paddlewheel Unit-Based Layered Metal–Organic Framework with Synergistic Intermolecular Interactions for Efficient Iodine Adsorption

“…After heating for at least 13 h, the color of 1 changed obviously from colorless to black by the naked eye (Figure 3). Gravimetric analysis showed that the amount of adsorbed I 2 was up to 2.00 g g −1 (Table 2), equivalent to about 3 I 2 molecules per Zn atom in 1, better than or comparable to some previously reported MOFs (Table S4), like HSB-W8 (2.32 mg g −1 ), 40 HKUST-1 (196.6 wt %), 41 [Co(L)]•DMF• H 2 O (676.25 mg g −1 ), 42 and MOF-808 (2.180 g g −1 ) 43 but lower than PSIF materials. 44 The slight difference from the calculated value of 2.27 g g −1 may be due to the residual solvents in the channel of 1.…”

Selective Visible-Light Photocatalytic Oxidation of Sulfides and Catalytic CO2 Fixation by Two-Interpenetrated Photoresponsive MOF-150

“…Specifically, the adsorption capacities of MOF-150a at 1 atm and 273/298 K were 69.3 and 52.4 cm 3 g –1 for CO 2 and 27.8 and 21.4 cm 3 g –1 for CH 4 , respectively (Figure b). Although the saturated gas adsorption capacity of CO 2 at 298 K is lower than that of some excellent MOFs, such as [Zn­(odip) 0.5 (bpe) 0.5 (CH 3 OH)]·0.5NMF·H 2 O (118.7 cm 3 g –1 ) and [Ca­(dtztp) 0.5 (DMA)]·2H 2 O (93.8 cm 3 g –1 ). − But it is also higher than most MOF values such as CuZn 3 (PDDA) 3 (OH) (48 cm 3 g –1 ), TpPA-NO 2 (45.18 cm 3 g –1 ), {[Co­(L)]·DMF·2H 2 O} n (39.68 cm 3 g –1 ) − (Table ). The high adsorption capacity for CO 2 may be attributed to the synergistic interaction between the abundant exposed metal sites on MOF-150a and the lone pair of electrons on the N atom of the H 3 NTB.…”

Metal phosphonates as heterogeneous catalysts for highly efficient chemical fixation of CO2 under mild conditions

“…It is noted that the conversion of phenyl glycidyl ether is 88.4%, higher than styrene oxide, which might be attributed to the electron-absorbing effect. The results of comparing the catalytic performance of 1 with other Co-based MOF catalysts already described in the literature for the preparation of carbonates are placed in Table S4 † 33 . The analysis shows that 1 is in the first echelon of catalytic performance among the above-mentioned catalysts and can efficiently catalyze the conversion of CO 2 under relatively mild conditions.…”