Three novel Co(ii)-based MOFs: syntheses, structural diversity, and adsorption properties

Abstract

In this paper, three new cobalt-based metal organic frameworks (MOFs) with different topologies, namely {[Co(HL)(tib)(H2O)]·2H2O}n (1), [Co3(L)2(bibp)4(H2O)2]n (2) and [Co2(L)(bip)(μ3-OH)]n (3) (H3L = 3-(3,5-dicarboxylphenoxy)-6-carboxylpyridine, tib = 1,3,5-tirs(1-imidazolyl)benzene, bibp = 4,4'-bis(imidazolyl)biphenyl,...

Mesoporous MOF Based on a Hexagonal Bipyramid Co8-Cluster: High Catalytic Efficiency on the Cycloaddition Reaction of CO2 with Bulky Epoxides

“…Recently, cobalt-based MOFs have attracted intense attention because of their diverse structures and interesting magnetic, adsorption, catalytic, and sensing properties. − In Co-MOFs, Co­(II) ions are usually connected by hydroxide, oxide, water, and carboxylate groups to afford various clusters, which would enhance the skeletal stability. , Moreover, Co­(II) ions, as open metal sites (OMSs) upon removal of coordinated solvent molecules in the cluster, could be employed as potent Lewis acid sites in CO 2 activation. , Therefore, constructing novel Co-MOFs with large porosity and unique cobalt clusters is well worth studying to promote their applications in CO 2 capture and conversion. However, the formation of a unique cobalt cluster depends on a variety of reaction parameters, such as solvent, pH value, temperature, reagent ratio, additive, and so on. − The syntheses of Co-MOFs with large channel and high Lewis acidic activity remain challenging.…”

Effective detection of Ag+, Hg2+ and dye adsorption properties studies of Ln-MOFs based on a benzimidazole carboxylic acid ligand

“…[24][25][26][27][28][29][30] In general, the electron density and host-guest interactions (such as hydrogen bonding, electrostatic interactions, and π-π stacking) of MOFs determine the effective luminescence induction and stronger adsorption properties. [31][32][33][34][35][36][37] Therefore, Ln-MOFs based on electron-rich aromatic ligands are preferred for fluorescent sensors and dye adsorbents. Such Ln-MOFs have the following advantages: (1) Introducing different functional groups to benzimidazole give it different functions and the imidazole ring has good coordination ability, making it easy to coordinate with transition metals and rare earth metals to generate MOFs with excellent performance; 38 (2) Ln-MOFs possess a higher stability, excellent fluorescence quantum efficiencies, 39 a long fluorescence life, a narrow fluorescence emission peak and Stokes shift, etc.…”

A novel trigonal bipyramidal cage-based Zn(ii)-MOF featuring two types of trinuclear clusters with high gas sorption properties

“…Over the past few years, as a new advanced adsorbent material, [1][2][3][4][5] metal-organic frameworks (MOFs) have received considerable attention due to their fascinating structural diversity and resultant tunability. [6][7][8][9] MOFs comprise inorganic metal nodes and organic ligands linked through coordination bonds 10,11 and weak interactions. [12][13][14] Metal inorganic nodes empower unrivalled structural diversity as they can adopt many kinds of coordination geometries that afford variable structural topologies.…”