Fig. 1: Comparison of traditional and proposed methyl iodide adsorption mechanisms.
From: Strategies for high-temperature methyl iodide capture in azolate-based metal-organic frameworks
a Illustration of traditional mechanisms for the adsorptive capture of CH3I: (i) the nucleophilic substitution reaction utilizing embedded amine groups as nucleophiles, and (ii) dissociative chemisorption whereby supported Ag clusters/particles react with CH3I to form AgI. b Illustration of two mechanisms proposed in this study for the adsorptive capture of CH3I: (i) a nucleophilic substitution reaction utilizing mobile nucleophiles, specifically the counter anions of MOF MFU-4l, and (ii) non-dissociative chemisorption through coordinatively unsaturated copper (I) sites within MFU-4l. Both strategies enable enhanced CH3I uptake and easy adsorbent regeneration. c Structural representation of MFU-4l, with an enlarged view of the node structure showcasing the octahedrally coordinated Zn, tetrahedrally coordinated Zn, and counter anion Cl-. In the sphere-rod model, the color codes are Gray for C; blue for N; red for O; white for H; violet-gray for Zn; and green for Cl.
