Diverse Metal–Organic Materials (MOMs) Based on 9,9′-Bianthryl-Dicarboxylic Acid Linker: Luminescence Properties and CO2 Capture

Abstract

A fluorescent organic linker, namely, 10,10′-bis(4-carboxyphenyl)-9,9′-bianthryl (H2L), was rationally designed and synthesized to access luminescent metal–organic materials (MOMs). A series of structurally diverse MOMs was synthesized with the diacid linker H2L by reacting it with main group, transition, and lanthanide metal ions under different conditions. Among them, Zn-L MOM is a 1D polymeric chain, while Cd-L is a 2D structure in which 4,4′-bipyridyls mediate the formation of 2D networks by linking up the 1D metal–carboxylate chains. The Pb-L MOM is found to be a 2D polymeric net, while Sr-L, obtained under similar reaction conditions, is a noninterpenetrated 3D polymeric structure; the extension from 2D to 3D framework occurs by mediation of Cl– ions. Notably, the reaction of H2L with the lanthanide ions yielded isostructural 3D MOFs, i.e., Tb-L, Eu-L, Sm-L, Nd-L, La-L, Pr-L, Gd-L, and Yb-L, which are noninterpenetrated and porous. The Ln-MOFs are highly robust and stable to solvent exclusion. The r...