Evidence map›Paper›PMID 39598759›Full record

ArticleMolecules (Basel, Switzerland)2024

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

Václav Pokorný, Vojtěch Štejfa, Jakub Havlín, Michal Fulem, Květoslav Růžička

Abstract read
In one paragraph

Article in Molecules (Basel, Switzerland), 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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3 · Its place in the literature

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0 citing papers in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

5 authors.

Václav PokornýDepartment of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague, Czech Republic.ORCID 0000-0003-4145-7982
Vojtěch ŠtejfaDepartment of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague, Czech Republic.ORCID 0000-0002-2839-8546
Jakub HavlínCentral Laboratories, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague, Czech Republic.ORCID 0000-0003-3613-7642
Michal FulemDepartment of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague, Czech Republic.ORCID 0000-0002-5707-0670
Květoslav RůžičkaDepartment of Physical Chemistry, University of Chemistry and Technology, Prague, Technická 5, CZ-166 28 Prague, Czech Republic.ORCID 0000-0001-9048-1036

Funding

Grantová Agentura České Republiky 22-07164S
6 · The paper itself

Abstract

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 (α and γ) 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 α-glycine in the temperature interval (2-267) K. The crystal heat capacities of the α- and γ-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 α/γ-glycine were developed. The literature heat capacities for β-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.

Indexed as

crystalline phaseglycineheat capacitypolymorphism

Identifiers

PMID39598759
PMCPMC11596786

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