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Chemical Activity of Metastable Modifications of Solid Reagents.

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Title: Chemical Activity of Metastable Modifications of Solid Reagents.
Authors: Shablovskii, Ya. O.1 (AUTHOR) ya.shablowsky@yandex.ru
Source: Theoretical Foundations of Chemical Engineering. Jun2025, Vol. 59 Issue 3, p691-696. 6p.
Subjects: Vitrification, Polymorphic transformations, Thermodynamics, Chemical kinetics, Chemical potential, Inorganic compounds, Metastable states
Abstract: The paper reveals the thermodynamic and kinetic patterns of phase-forming vitrification. The conversion of a low-molecular-weight substance into a glassy state enables to increase the chemical activity of this substance with respect to its standard crystalline state without changing the reaction consuming this substance. An expression has been obtained to quantify this increase. To distinguish the reactivity of polymorphic modifications of a crystalline reagent, the following rule of fining activation has been substantiated: a reaction consuming a crystalline reagent should be carried out in region of its polymorphic transformation using exactly the modification that is more susceptible to domainization. The multiplicity of reaction acceleration due to the domainization of the reagent has been determined. [ABSTRACT FROM AUTHOR]
Copyright of Theoretical Foundations of Chemical Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: <searchLink fieldCode="DE" term="%22Vitrification%22">Vitrification</searchLink><br /><searchLink fieldCode="DE" term="%22Polymorphic+transformations%22">Polymorphic transformations</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+kinetics%22">Chemical kinetics</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+potential%22">Chemical potential</searchLink><br /><searchLink fieldCode="DE" term="%22Inorganic+compounds%22">Inorganic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Metastable+states%22">Metastable states</searchLink>
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  Data: The paper reveals the thermodynamic and kinetic patterns of phase-forming vitrification. The conversion of a low-molecular-weight substance into a glassy state enables to increase the chemical activity of this substance with respect to its standard crystalline state without changing the reaction consuming this substance. An expression has been obtained to quantify this increase. To distinguish the reactivity of polymorphic modifications of a crystalline reagent, the following rule of fining activation has been substantiated: a reaction consuming a crystalline reagent should be carried out in region of its polymorphic transformation using exactly the modification that is more susceptible to domainization. The multiplicity of reaction acceleration due to the domainization of the reagent has been determined. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Theoretical Foundations of Chemical Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S0040579525602201
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        Text: English
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      – SubjectFull: Vitrification
        Type: general
      – SubjectFull: Polymorphic transformations
        Type: general
      – SubjectFull: Thermodynamics
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      – SubjectFull: Chemical kinetics
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      – SubjectFull: Chemical potential
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      – SubjectFull: Inorganic compounds
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      – SubjectFull: Metastable states
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              Text: Jun2025
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