主题词：Synthesis and biological activity; Multicomponent Synthesis of Heterocycles; Electrochemical sensors and biosensors; Analytical Chemistry and Sensors; Inorganic and Organometallic Chemistry; Electrochemical Analysis and Applications; Analytical Methods in Pharmaceuticals; Synthesis and Characterization of Heterocyclic Compounds; Analytical Chemistry and Chromatography; Metal complexes synthesis and properties; Analytical chemistry methods development; Chemical Synthesis and Reactions; Water Quality Monitoring and Analysis; Nonlinear Optical Materials Research; Synthesis and Biological Evaluation; Adsorption and biosorption for pollutant removal; Conducting polymers and applications; Extraction and Separation Processes; Chemical Thermodynamics and Molecular Structure; Synthesis of Organic Compounds; Chemistry and Chemical Engineering; Pharmacological Effects and Assays; Chalcogenide Semiconductor Thin Films; Process Optimization and Integration; Boron and Carbon Nanomaterials Research