Synthesis, Optical, Dielectric, SHG, Magnetic and Visible Light Driven Catalytic Studies on Compounds Belonging to the Swedenborgite Structure

Chem Asian J. 2024 Feb 6:e202301113. doi: 10.1002/asia.202301113. Online ahead of print.ABSTRACTA new compound, InBaZn3GaO7, with swedenborgite structure along with transition metal (TM) substituted variants has been prepared. The structure contains layers of tetrahedral ions (Zn2+/Ga3+) connected by octahedrally coordinated In3+ ion forming the three-dimensional structure with voids where the Ba2+ ions occupy. The TM substituted compounds form with new colors. The origin of the color was understood based on the ligand-field transitions and metal to metal charge transfer (MMCT) transitions . The near IR reflectivity studies indicate that the Ni - substituted compounds exhibit good near - IR reflectivity behavior, making them possible candidates for 'cool-pigments'. The temperature dependent dielectric studies indicate that the InBaZn3GaO7 compound undergoes a phase transition at ~ 360 °C. The compounds are active towards second harmonic generation (SHG). Magnetic studies show the compounds, InBaZn2CoFeO7 and InBaZn2CuFeO7 to be anti-ferromagnetic in nature. The copper containing compounds were found to be good catalysts, under visible light, for the oxidation of aromatic alkenes. The many properties observed in the swedenborgite structure-based compounds suggests that the mineral structure offers a fertile ground to investigate newer compositions and properties.PMID:38321639 | DOI:10.1002/asia.202301113

Source: Chemistry, an Asian Journal - February 7, 2024 Category: Chemistry Authors: Sivakumar Gurusamy Souvik Banerjee Athinarayanan Sundaresan Mingli Liang P Shiv Halasyamani Srinivasan Natarajan Source Type: research