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MM: Fachverband Metall- und Materialphysik

MM 19: Poster Session

MM 19.27: Poster

Dienstag, 10. März 2026, 18:00–20:00, P5

Silica-Supported Nano Metal Complexes Derived from a Schiff Base Ligand: Structural, Theoretical, and Catalytic Investigations — •Tarek El-Dabea — Chemistry Department, Faculty of Science, King Salman International University, Ras Sudr, Sinai 46612, Egypt

Silica-based nanomaterials were prepared from natural silica sand and used as supports for nano metal complexes containing Ru(III), Fe(III), VO(II), and Ag(I) ions. The SiO2 support, obtained via a grinding and paste-based technique, provided a stable high-surface matrix for immobilization. Complexes derived from a bidentate Schiff base ligand were characterized by spectroscopic and analytical methods, confirming their geometry and stoichiometry. Solution studies showed stable metal-ligand coordination, while DFT and TD-DFT analyses gave insights into the optimized structures and electronic transitions consistent with experiment. Among the investigated systems, the Ru(III)/SiO2 composite exhibited distinctive electronic and catalytic properties, efficiently promoting multicomponent reactions under microwave irradiation. Optimized eco-friendly conditions (H2O/EtOH) gave high yields, and the catalyst

Keywords: Silica-based nanomaterials; silica sand; grinding and paste-based technique; catalytic applications; eco-friendly