Molecular Interactions Investigation of L-Histidine in Water and in Aqueous Citric Acid at Different Temperatures Using Volumetric and Acoustic Methods

Densities, and ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg ) in water and 0.1 mol·kg aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume Φ , limiting appare...

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Bibliographic Details
Published inZeitschrift für physikalische Chemie (Neue Folge) Vol. 232; no. 3; pp. 393 - 408
Main Authors Kumar, Dinesh, Sharma, Shashi Kant
Format Journal Article
LanguageEnglish
Published Munich De Gruyter 28.03.2018
Walter de Gruyter GmbH
Subjects
Acoustic impedance
adiabatic compressibility
Adiabatic flow
apparent molar volume
Citric acid
Compressibility
Histidine
intermolecular free length
Molar volume
Molecular interactions
partial molar volume expansibility
Ultrasonic testing
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Summary:Densities, and ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg ) in water and 0.1 mol·kg aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume Φ , limiting apparent molar volume Φ and the slope , partial molar expansibilities Φ , Hepler’s constant, adiabatic compressibility , transfer volume Φ , intermolecular free length ( ), specific acoustic impedance ( ) and molar compressibility ( ) were calculated. The results are interpreted in terms of solute–solute and solute–solvent interactions in these systems. It has also been observed that L-histidine act as structure maker in water and aqueous citric acid.
ISSN:0942-9352
2196-7156
DOI:10.1515/zpch-2017-0977