主题词：Multicomponent Synthesis of Heterocycles; Synthesis and biological activity; Electrochemical Analysis and Applications; Chemical Synthesis and Reactions; Analytical chemistry methods development; Metal complexes synthesis and properties; Electrochemical sensors and biosensors; Metal-Organic Frameworks: Synthesis and Applications; Nanomaterials for catalytic reactions; Synthesis and Characterization of Heterocyclic Compounds; Analytical Chemistry and Sensors; Advanced Photocatalysis Techniques; Synthesis and Biological Evaluation; Analytical Chemistry and Chromatography; Adsorption and biosorption for pollutant removal; Polyoxometalates: Synthesis and Applications; Oxidative Organic Chemistry Reactions; Molecular Sensors and Ion Detection; Synthesis of Organic Compounds; TiO2 Photocatalysis and Solar Cells; Chemical Synthesis and Analysis; Conducting polymers and applications; Advanced biosensing and bioanalysis techniques; Sulfur-Based Synthesis Techniques; Microwave-Assisted Synthesis and Applications