Green Synthesis of Metal-Phenolic Network
Location
SU-003
Department
Chemistry
Abstract
Polyphenols, which have been used as building blocks to produce engineering biomaterials, display unique chemical, physical and biological properties. Metal phenolic network (MPN) was prepared using Butterfly pea (Clitoria ternatea L.) flower extract and silver nitrate (AgNO3) solution. Butterfly pea flower extract was used as the active precursor to generate the phenolic scaffold for the fabrication of phenolic network. The synthesis and the formation of MPN were examined by UV-visible spectroscopy and Fourier transform infrared spectroscopy (FTIR). The effect of the concentration of silver nitrate, incubation time, pH and the temperature in the formation MPN was studied. The plasmon resonance band in the visible region (410 nm) confirmed the formation MPN particles. It was observed that the MPN synthesis was directly related to the silver nitrate concentration and the incubation time. MPN particles do not appear to form within first hour of the synthesis. The location of the plasmon band of MPN particles were consistent throughout all time evolution studies for 1mmol AgNO3 concentration. At higher AgNO3 concentration, the red shift of the plasmon band was observed due to the increase in particle size or cluster formation. At lower AgNO3 concentration(1mmol), two hours of incubation time was appropriate to produce the maximum MPN particle concentration. At higher AgNO3 concentrations, MPN particle aggregates were proportional to the incubation time. An increase in the reaction temperature has produced more MPN particles while a basic reaction mixture (pH 10.0) was needed for successful reaction. The FTIR analysis confirmed the formation of nano particles and the MPN network. The peaks at 3276 cm-1 (-OH) and 1635cm-1 (-C=O) shown by the FTIR analysis indicate the binding of Ag+ with hydroxyl and carboxylate groups of the polyphenol. Phenolic groups present in the Butterfly pea flower extract act as the reducing agent to convert Ag+ to Ag to produce MPN particles. A reduction of Ag+ was demonstrated through the facile synthesis method, and successfully produced a metal phenolic network.
Faculty Sponsor
Chandana Meegoda, Northeastern Illinois University
Green Synthesis of Metal-Phenolic Network
SU-003
Polyphenols, which have been used as building blocks to produce engineering biomaterials, display unique chemical, physical and biological properties. Metal phenolic network (MPN) was prepared using Butterfly pea (Clitoria ternatea L.) flower extract and silver nitrate (AgNO3) solution. Butterfly pea flower extract was used as the active precursor to generate the phenolic scaffold for the fabrication of phenolic network. The synthesis and the formation of MPN were examined by UV-visible spectroscopy and Fourier transform infrared spectroscopy (FTIR). The effect of the concentration of silver nitrate, incubation time, pH and the temperature in the formation MPN was studied. The plasmon resonance band in the visible region (410 nm) confirmed the formation MPN particles. It was observed that the MPN synthesis was directly related to the silver nitrate concentration and the incubation time. MPN particles do not appear to form within first hour of the synthesis. The location of the plasmon band of MPN particles were consistent throughout all time evolution studies for 1mmol AgNO3 concentration. At higher AgNO3 concentration, the red shift of the plasmon band was observed due to the increase in particle size or cluster formation. At lower AgNO3 concentration(1mmol), two hours of incubation time was appropriate to produce the maximum MPN particle concentration. At higher AgNO3 concentrations, MPN particle aggregates were proportional to the incubation time. An increase in the reaction temperature has produced more MPN particles while a basic reaction mixture (pH 10.0) was needed for successful reaction. The FTIR analysis confirmed the formation of nano particles and the MPN network. The peaks at 3276 cm-1 (-OH) and 1635cm-1 (-C=O) shown by the FTIR analysis indicate the binding of Ag+ with hydroxyl and carboxylate groups of the polyphenol. Phenolic groups present in the Butterfly pea flower extract act as the reducing agent to convert Ag+ to Ag to produce MPN particles. A reduction of Ag+ was demonstrated through the facile synthesis method, and successfully produced a metal phenolic network.