Synthesis of novel multifunctional mixed metal metal-organic frameworks for development as chemical sensors and carbon dioxide adsorbent

The dissertation explores the synthesis and characterization of framework materials using a combination of different metals and the triprotic trimesate (TMA) ligand. Three heterometallic compounds including [CaM(HTMA)2(H2O)8] (M = Zn (1) and Co (2)), along with a minor phase [CaZn2(TMA)2(H2O)10]·2H2O (3) were effectively synthesized under hydrothermal conditions. These compounds exhibit distinctive coordination modes and structural dimensions. Particularly, 1 exhibits excellent thermal and solvent stability, bright blue spectrum emission, and the potential to be a luminescent sensor for detecting small organic compounds. Furthermore, the dissertation focuses on the effective synthesis of three porous 3D mixed metals-based MOFs combining cadmium(II) and calcium(II) ions with a TMA ligand, namely (ImH) [CaCd2(TMA)(HTMA)2] 2H2O (4), (Me2NH2)[CaCd2(TMA) (HTMA)2]·4H2O (5) and (Me2NH2)(Me4N)[Ca2Cd4(TMA)2(HTMA)4]8H2O (6). These MOFs feature a 3D anionic framework {CdCd2(HTMA)3}n stabilized by cationic molecules including ImH, Me2NH2, and Me4NH. The properties of these compounds, which include their capacity to adsorb CO2 and fluorescent sensors for small organic compounds and metal ions in ethanol solutions, were analyzed and discussed.