主题词：Synthesis and biological activity; Nanoparticles: synthesis and applications; Metal complexes synthesis and properties; Multicomponent Synthesis of Heterocycles; Advanced Photocatalysis Techniques; Computational Drug Discovery Methods; Adsorption and biosorption for pollutant removal; Synthesis and Characterization of Heterocyclic Compounds; Electrochemical sensors and biosensors; Synthesis and Biological Evaluation; Nanomaterials for catalytic reactions; Click Chemistry and Applications; Electrochemical Analysis and Applications; Metal-Organic Frameworks: Synthesis and Applications; Advanced Nanomaterials in Catalysis; TiO2 Photocatalysis and Solar Cells; Molecular Sensors and Ion Detection; Advanced biosensing and bioanalysis techniques; Nonlinear Optical Materials Research; Copper-based nanomaterials and applications; Gas Sensing Nanomaterials and Sensors; Corrosion Behavior and Inhibition; Graphene and Nanomaterials Applications; Analytical Chemistry and Sensors; Conducting polymers and applications