Multifunctional Fourfold Interpenetrating Diamondoid Network: Gas Separation and Fabrication of Palladium Nanoparticles

Abstract
A fourfold interpenetrating diamondoid network, [{[Ni(cyclam)]2(mtb)}n]⋅8n H2O⋅4n DMF (1) (MTB=methanetetrabenzoate, DMF=dimethylformamide), has been assembled from [Ni(cyclam)][ClO4]2 (cyclam=1,4,8,11‐tetraazacyclotetradecane) and methanetetrabenzoic acid (H4MTB) in DMF/H2O (7:3, v/v) in the presence of triethylamine (TEA). Despite the high‐fold interpenetration, 1 generates 1D channels that are occupied by water and DMF guest molecules. Solid 1, after removal of guest molecules, exhibits selective gas adsorption behavior for H2, CO2, and O2 rather than N2 and CH4, suggesting possible applications in gas separation technologies. In addition, solid 1 can be applied in the fabrication of small Pd (2.0±0.6 nm) nanoparticles without any extra reducing or capping agent because a NiII macrocyclic species incorporated in 1 reduces PdII ions to Pd0 on immersion of 1 in the solution of Pd(NO3)2⋅2 H2O in MeCN at room temperature.