C2H2 capture and separation in a MOF based on Ni6 trigonal-prismatic units

Abstract

A honeycomb MOF, based on rare Ni₆ trigonal-prismatic supermolecular building blocks, was fabricated by utilizing an unexploited [1,1′-biphenyl]-3,3′,5,5′-tetracarboxylic acid linker with –NH₂ substituent groups. The MOF contains novel building blocks and an enchanting structure, and also exhibits water-stable characteristics. Uniquely, the accessible adsorption sites, arising due to the high-density Lewis-basic amino-coordinated groups and uncoordinated carboxylate O atoms in the pores, endow the MOF with excellent capture and separation capabilities for C₂H₂.