Heat Capacities of α-, β-, and γ- Polymorphs of Glycine

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F24%3A43930278" target="_blank" >RIV/60461373:22340/24:43930278 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22810/24:43930278

Result on the web

<a href="https://www.mdpi.com/1420-3049/29/22/5366" target="_blank" >https://www.mdpi.com/1420-3049/29/22/5366</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/molecules29225366" target="_blank" >10.3390/molecules29225366</a>

Result language

angličtina

Original language name

Heat Capacities of α-, β-, and γ- Polymorphs of Glycine

Original language description

As a part of our effort to establish reliable thermodynamic data for amino acids, the heat capacity and phase behavior are reported for two stable polymorphs (alpha and gamma) of glycine (aminoacetic acid, CAS RN: 56-40-6). Prior to heat capacity measurement, thermogravimetric analysis and X-ray powder diffraction were performed to determine decomposition temperatures and initial crystal structures, respectively. The literature heat capacities obtained by adiabatic calorimetry are available in the temperature interval (7-304). The literature data were used for validating performance of our relaxation (heat-pulse) calorimeter, which was used for measurement of the heat capacity of alpha-glycine in the temperature interval (2-267) K. The crystal heat capacities of the alpha- and gamma-glycine were extended towards higher temperatures using Tian-Calvet calorimetry in the temperature interval (262-358) and power compensation DSC in the temperature interval (310-449) K. As a result, reference heat capacities and thermodynamic functions for the crystalline phase from 0 K up to 450/435 K for alpha/gamma-glycine were developed. The literature heat capacities for beta-glycine over the range 0 K to 295 K were treated in the same manner in order to provide thermodynamic data for all three polymorphs existing at the atmospheric pressure.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GA22-07164S" target="_blank" >GA22-07164S: Rational design of drug delivery systems based on tailored biodegradable polymers using an iterative in silico and experimental approach</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

MOLECULES

ISSN

1420-3049

e-ISSN

1420-3049

Volume of the periodical

29

Issue of the periodical within the volume

22

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

5366

UT code for WoS article

001365279200001

EID of the result in the Scopus database

2-s2.0-85210179706