Molecular dynamics and dielectric relaxation by DRS, calorimetric analysis and spectral inferences of amino acid complexes

• Published in: Chemical physics letters 2019-09, Vol.731, p.136585, Article 136585
• Main Authors: Vinoth, K., Ganesh, T., Senthil Kumar, P., Maria Sylvester, M., Anand Karunakaran, D.J.S., Ramrao Deshmukh, Avadhut, Kumbharkhane, A.C.
• Format: Article
• Language: English
• Subjects: Dielectric relaxation; DSC; NMR; Solute-solvent interaction; Time domain reflectometry
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2019.07.013

[Display omitted] •The dielectric dispersion process is fitted with Debye and C-C model.•Intermolecular OH and H bonds found as averaged to structural modifications.•The zwitteronic nature of aqueous amino acid shows two relaxations peak.•Endothermic nature confirms structure modifying process and stability assed by fragility index. The aqueous solutions of l-Methionine and l-Phenylalanine studied analytically to understand the dynamics of dielectric relaxation and spectroscopic characterization by TDR. Intermolecular interaction assists the migration of charges in the networks of H-bonds surfaced out by amino acid in the low frequency with Debye like behavior. The relaxation of amino acid molecule fitted with Debye and Cole-Cole model. Thermodynamic parameters and parallel ordering by correlation factor are determined. The DSC analysis incites the dependency of glass transition temperature and Fragility index with concentration, polarity, dielectric strength and temperature. Conformation of mixture groups carried out by FTIR and NMR analysis.