SARJUNA K
@kgasc.co.in
Guest lecturer / Chemistry
Government Arts And Science College Karambakkudi
EDUCATION
MSc., B. Ed., M. Phil., PhD
RESEARCH, TEACHING, or OTHER INTERESTS
Chemistry, Spectroscopy
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Ilangeswaran D and Sarjuna K
Bentham Science Publishers Ltd.
Background: When halide salts and hydrogen bond donors are combined, they produce Deep Eutectic Solvents, which have a lower freezing/melting point than the individual components. At room temperature, they have emerged as viable alternatives to ionic liquids. The wonderful features of deep eutectic solvents such as humidity tolerance, high-temperature stability, low cost, non-hazardous, reusable, and recyclable nature, allow them to replace ionic liquids. Objective: To prepare two newer Ternary Deep Eutectic Solvents using Malonic acid - Glucose – Glutamine and Malonic acid - Fructose – Glutamine. Using the prepared ternary deep eutectic solvents, to synthesize silver nanoparticles and study the antifungal behavior. Methods: The ternary deep eutectic solvents were prepared by the evaporation method in water and subjected to measure the properties such as density, pH, conductivity, viscosity, and absorption frequencies of Fourier Transform Infrared Spectroscopy. The prepared deep eutectic solvents are used for the synthesis of Silver Nanoparticles by the chemical reduction method in presence of Hydrazine Hydrate as a reducing agent and sodium hydroxide as a stabilizing agent. The synthesized nanoparticles are characterized by UV-Visible Spectroscopy, Fourier Transform Infrared Spectroscopy, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis techniques. Results: The characteristic absorption peak of UV-Visible Spectroscopy shows that silver nanoparticles were formed. FTIR exposes the metallic and other bonding of the nanoparticles and the caping materials. From the XRD pattern, we found the crystalline and the images formed in the SEM are in the nanoscale. The average particle size of silver nanoparticles is 116.87nm and 26.61 nm. Conclusion: In our study, two types of novel ternary deep eutectic solvents were developed. They act as a better solvent media for the synthesis of silver nanoparticles and the synthesized nanoparticles show antifungal behaviors against some fungi.
Sarjuna K
The Electrochemical Society
In this study, we had effectively generated four types of ternary deep eutectic solvents using the method of evaporation by mixing zinc chloride(ZC) with hydrogen bond donors such as Glucose(GLU) & Fructose(FRU) and Amino acids such as Glutamine(GLUT) & Glycine (GLY) [i.e.a- ZC-GLU-GLY, b- ZC-FRU-GLY, c- ZC-GLU-GLUT, d- ZC-FRU-GLUT]. After that, physical properties such as pH, conductivity, density, and viscosity were applied to the solvents. The H – bonded interaction between zinc chloride and other components in these TDESs were revealed by the FTIR spectroscopy. The prepared TDESs were used as a solvent medium for the synthesis of silver nanoparticles (Ag NPs) by chemical reduction method using sodium borohydride as reducing agent and sodium hydroxide as stabilizing agent. The synthesized Ag NPs were characterized by FTIR, UV, XRD, EDAX and SEM techniques. Silver has a variety of applications, but one of the most notable usages is an antibacterial disinfectant.
K. Sarjuna and D. Ilangeswaran
Elsevier BV
K. Sarjuna and D. Ilangeswaran
Elsevier BV