Dissociation of the hyperchromate ion into the chromic ion in crystals: An electron spin resonance study

Shen Yuan Chou; Jiang Tsu Yu

doi:10.1016/0022-3697(90)90043-F

Dissociation of the hyperchromate ion into the chromic ion in crystals: An electron spin resonance study

Shen Yuan Chou^*, Jiang Tsu Yu

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

By heating LiCsSO₄ crystals which have been doped with ammonium chromate and γ-irradiated, Cr³⁺ species with large zero-field splittings were detected by electron spin resonance (ESR). The Cr³⁺ species result from an ammonium-hydrogen-assisted dissociation of the CrO₄^3- and CrO₃^- species produced by irradiation. The same oxygen-stripping effect was observed by ESR in γ-irradiated LiNH₄SO₄ and (NH4)₂SO₄ crystals doped with CrO₄^2-. Dissociation of CrO₄^2- itself into Cr^3- was observed by ESR in CrO₄^2--doped ammonium sulfate crystals heated at temperatures well below the dissociation temperature of this compound.

Original language	English
Pages (from-to)	993-999
Number of pages	7
Journal	Journal of Physics and Chemistry of Solids
Volume	51
Issue number	8
DOIs	https://doi.org/10.1016/0022-3697(90)90043-F
Publication status	Published - 1990

Keywords

Dissociation
ESR
free radical

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/0022-3697(90)90043-F

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title = "Dissociation of the hyperchromate ion into the chromic ion in crystals: An electron spin resonance study",

abstract = "By heating LiCsSO4 crystals which have been doped with ammonium chromate and γ-irradiated, Cr3+ species with large zero-field splittings were detected by electron spin resonance (ESR). The Cr3+ species result from an ammonium-hydrogen-assisted dissociation of the CrO43- and CrO3- species produced by irradiation. The same oxygen-stripping effect was observed by ESR in γ-irradiated LiNH4SO4 and (NH4)2SO4 crystals doped with CrO42-. Dissociation of CrO42- itself into Cr3- was observed by ESR in CrO42--doped ammonium sulfate crystals heated at temperatures well below the dissociation temperature of this compound.",

keywords = "Dissociation, ESR, free radical",

author = "Chou, {Shen Yuan} and Yu, {Jiang Tsu}",

year = "1990",

doi = "10.1016/0022-3697(90)90043-F",

language = "English",

volume = "51",

pages = "993--999",

journal = "Journal of Physics and Chemistry of Solids",

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TY - JOUR

T1 - Dissociation of the hyperchromate ion into the chromic ion in crystals

T2 - An electron spin resonance study

AU - Chou, Shen Yuan

AU - Yu, Jiang Tsu

PY - 1990

Y1 - 1990

N2 - By heating LiCsSO4 crystals which have been doped with ammonium chromate and γ-irradiated, Cr3+ species with large zero-field splittings were detected by electron spin resonance (ESR). The Cr3+ species result from an ammonium-hydrogen-assisted dissociation of the CrO43- and CrO3- species produced by irradiation. The same oxygen-stripping effect was observed by ESR in γ-irradiated LiNH4SO4 and (NH4)2SO4 crystals doped with CrO42-. Dissociation of CrO42- itself into Cr3- was observed by ESR in CrO42--doped ammonium sulfate crystals heated at temperatures well below the dissociation temperature of this compound.

AB - By heating LiCsSO4 crystals which have been doped with ammonium chromate and γ-irradiated, Cr3+ species with large zero-field splittings were detected by electron spin resonance (ESR). The Cr3+ species result from an ammonium-hydrogen-assisted dissociation of the CrO43- and CrO3- species produced by irradiation. The same oxygen-stripping effect was observed by ESR in γ-irradiated LiNH4SO4 and (NH4)2SO4 crystals doped with CrO42-. Dissociation of CrO42- itself into Cr3- was observed by ESR in CrO42--doped ammonium sulfate crystals heated at temperatures well below the dissociation temperature of this compound.

KW - Dissociation

KW - ESR

KW - free radical

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U2 - 10.1016/0022-3697(90)90043-F

DO - 10.1016/0022-3697(90)90043-F

M3 - Article

AN - SCOPUS:33749332168

SN - 0022-3697

VL - 51

SP - 993

EP - 999

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 8

ER -

Dissociation of the hyperchromate ion into the chromic ion in crystals: An electron spin resonance study

Abstract

Keywords

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