Four multiresponsive and self-sustaining metallogels were synthesized by the reaction of the disodium salt of the ligand carboxymethyl-(3,5-di-tert-butyl-2-hydroxy-benzyl)amino acetic acid with Cd(II) and Zn(II) halides, which were found to show excellent selectivity for dye adsorption and separation, and one of the gels shows a rare self-healing property.

Development of active porous materials that can efficiently adsorb H and CO is needed, due to their practical utilities. Here we present the design and synthesis of an interpenetrated Cu metal-organic framework (MOF) that is thermally stable, highly porous and can act as a heterogeneous catalyst. The Cu -MOF contains a highly symmetric polyhedral metal cluster (Cu ) with cuboctahedron geometry as secondary building unit (SBU). The double interpenetration of such huge cluster-containing nets provides a high density of open metal sites, due to which it exhibits remarkable H storage capacity (313 cm g at 1 bar and 77 K) as well as high CO capture ability (159 cm g at 1 bar and 273 K). Further, its propensity towards CO sorption can be utilized for the heterogeneous catalysis of the chemical conversion of CO into the corresponding cyclic carbonates upon reaction with epoxides, with high turnover number and turnover frequency values.

A copper(ii) metal-organic hydrogel has been synthesised and characterised. This hydrogel is an efficient, reusable precatalyst for CuAAC reactions and chemical fixation of CO under solvent free conditions.

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