This edited volume comprises five chapters, each detailing recent updates in chemistry research. Chapter One describes different types of polymer electrolytes and their preparation methods as well as ion transport mechanisms, methods of improving properties, and techniques for evaluating their structure and properties. Chapter Two analyses the scopes and limitations of chromatography, NMR spectroscopy, and UV spectroscopy for assigning fullerene C60 regioisomeric multiadducts. Chapter Three focuses on electrochemical techniques used for developing insulin sensors of high specificity and sensitivity. Chapter Four presents selected contemporary achievements of different computational methods in modelling of natural and newly synthesized compounds with determined antibacterial, antifungal and antiviral activities. Lastly, Chapter Five reviews some metal porphyrins of manganese, cobalt, vanadium, and chromium and their catalytic applications.