Three Novel 3D Complexes Constructed by 1H‐Benzimidazole‐5, 6‐dicarboxylic Acid: Syntheses, Crystal Structures, and Luminescence

Abstract

Three novel compounds, {[Ln(Hbidc)(ox)0.5(H2O)]·H2O}n [Ln = Pr (1), Sm (2), Eu (3)] were synthesized by hydrothermal reaction of 1H‐benzimidazole‐5, 6‐dicarboxylic acid (H3bidc) and oxalate (ox) with Ln(NO3)3·6H2O in the presence of NaOH solution at 180 °C, and were structurally characterized by elemental analysis, FT‐IR, thermogravimetric analysis (TGA), and powder X‐ray diffraction (PXRD). Single crystal X‐ray diffraction analysis reveal that all the compounds are isomorphous, displaying 3D networks with 9‐connected topology based on the linkages of 2D layers and 1D zigzag chains. In addition, complex 3 exhibits strong luminescent property in the solid state at room temperature.

Anion-directed assemblies of europium(III) coordination polymers based on 1H-benzimidazole-5,6-dicarboxylate: structures and luminescence properties

“…Another feature of H 3 bidc is the relatively large -conjugated system in the benzimidazole ring which might contribute to desirable fluorescence properties resulting from the interaction between the 1H-benzimidazole-5,6-dicarboxylate (Hbidc 2À ) anion and the metal ion. This ligand has been used extensively by us and other groups in the construction of CPs with both single transition metals and lanthanide ions (Liu et al, 2019;Chai et al, 2018;Zhang et al, 2016a,b;Jin et al, 2016;Wang et al, 2013Wang et al, , 2015Wang et al, , 2016Li et al, 2014;Xiong et al, 2015;Sun et al, 2012Sun et al, , 2013Gao et al, 2013;Xu et al, 2012;Ding et al, 2012;Wei et al, 2009).…”

Two novel d10 transition metal complexes based on 1H‐benzimidazole‐5,6‐dicarboxylic acid: Synthesis, structure and multifunctional luminescence detection

“…(ii) Owing to the presence of a five‐membered nitrogen heterocycle moiety, it can be used as a flexible divergent coordinated site to fabricate coordination complex materials for molecular recognition applications. So far, many H 3 bidc‐linked coordination complexes have been reported, which include (i) d‐Hbidc‐MOFs, (ii) f‐Hbidc‐MOFs, (iii) 3d‐4f‐Hbidc‐MOFs and (iv) p‐f‐Hbidc‐MOFs …”