Advances in Polyphenol Modification and Functionalization

There are many different types of polyphenols that are found in nature; over 8000 such molecules have been found so far. Polyphenols naturally endow organisms with important chemical, physical, and biological characteristics, including antioxidation, metallic ion complexation, UV absorbance, and medicinal efficacy, which help to explain their abundance. Polyphenols can interact with various materials or substrates through covalent bonds, hydrophobic bonds, metallic coordination, hydrogen bonds, and electrostatic forces because they contain catechol and gallol moieties. The polyphenols in polyphenol-mediated assembly techniques usually exert multiple stabilizing attractive forces. But one interaction frequently controls the assembly process and determines the particle&s;s physicochemical behavior, which in turn affects possible uses. The main disadvantages of these compounds are their limited stability and bioavailability. Using biomolecules to surface-functionalize biomaterials is a potential approach to directly target certain signals from material surfaces to cells and tissues. Gallic acid was taken into consideration for functionalization since it is a suitable polyphenol model molecule and has a number of intriguing biological actions, including antibacterial, antioxidant, and anticarcinogenic qualities. A variety of modifiers have been used to modify the molecular structure of polyphenols because of their growing range of applications; the sorts of modifiers, when to add them, and the benefits and drawbacks of various synthesis procedures are all discussed. The logical design and assembly of enhanced polyphenol particles for particular applications will be made easier with a thorough understanding of the interactions between polyphenols and different building blocks. This chapter aims to explore the current level of knowledge concerning the chemical modification of polyphenols, as well as to provide the latest developments in polyphenol modification and functionalization, as well as the possible uses of polyphenol derivatives. Detailed information on the experimental parameters (chemicals, time, temperature, kind of solvent, yield, etc.) will be provided. It will investigate how the change affects the physicochemical characteristics of polyphenolic derivatives in relation to native polyphenol behavior.