The versatile coordination chemistry of 1,3-benzenedicarboxylate in the last 20 years: An investigation from the coordination modes to spectroscopic insights

Abstract

Aromatic carboxylates have been vastly applied as building blocks for the assembly of robust molecular-based materials owing to their potential application in various fields. In this family, 1,3-benzenedicarboxylate (1,3-bdc), which possesses a “V”-type configuration, has been distinguished. Over the past 20 years, the number of compounds based on 1,3-bdc rapidly expanded due to its multifaceted coordination chemistry and the possibility to generate materials with diversified applications. Therefore, the main purpose of this study is to explore the structural aspects, diversity, and the factors that influence coordination modes of 1,3-bdc by comparison of a series of structurally related compounds. In this sense, we highlight some aspects that can assist in a more rational design of coordination networks based on 1,3-bdc. We also discuss the structural-spectroscopic correlation of the metal-carboxylate bonds aimed at providing support for further investigation on multifunctional materials based on 1,3-bdc, including the amorphous solids. As a direct application of this knowledge, we produced two new CuII-based compounds by the combination of 1,3-bdc and 1,10-phenanthroline (phen). We obtained a discrete complex formed by two cocrystallized mononuclear complexes, {[Cu(1,3-Hbdc)(phen)(H2O)2]ClO4·[Cu(1,3-bdc)(phen)(H2O)2]·2(H2O)} (1), and a coordination polymer, {[Cu(1,3-bdc)(phen)(H2O)]·DMF}n (2), and we provided a further investigation of the nature and features of these compounds based on the discussion raised in this systematic study.