Dielectric dispersion, relaxation processes and interaction investigation by time domain reflectometry, thermal analysis and spectral implications on aromatic amino acid in aqueous solution

A first characterization and its signal analysis of various low molecular weight aromatic amino acid(L-Tryptophan and L-Tyrosine) over a broad frequency region. Our present principle researches focused on aqueous solutions to amino acids over 10MHz to 50GHz (0.01MHz <=nu <= 50GHz) using Time Domain Reflectometry(TDR). The molecular dynamics and dielectric relaxation significance of aromatic amino acid on different mole fraction and temperature were determined. From our obtained signal analysis various dielectric parameters, dispersed relaxation times, thermodynamic parameters, correlation factors are revealed. Correlation between heat flow with relaxation time and fragility through thermal analysis-Differential Scanning Calorimetry(DSC) are well described. Thermal analysis incites the dependency on glass transition temperature, dielectric strength and temperature. Confirmation of inter and intra molecular interaction and its mixture groups by FT-IR, FT-Raman and NMR analysis. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study conducted a first characterization and signal analysis of low molecular weight aromatic amino acids, revealing their molecular dynamics, dielectric relaxation properties, as well as thermodynamic parameters and correlation factors. Confirmation of inter and intra molecular interactions and mixture groups was done through FT-IR, FT-Raman and NMR analysis.