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Sholom S, McKeever S. Silver molecular clusters and the properties of radiophotoluminescence of alkali-phosphate glasses at high dose. RADIAT MEAS 2023. [DOI: 10.1016/j.radmeas.2023.106924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Kurobori T, Yanagida Y, Koguchi Y, Yamamoto T. Variable periodic time operated fibre-coupled dosimetry system using Ag-activated RPL glasses with build-up. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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McKeever SW, Sholom S, Shrestha N, Klein DM. Build-up of radiophotoluminescence (RPL) in Ag-doped phosphate glass in real-time both during and after exposure to ionizing radiation: A proposed model. RADIAT MEAS 2020. [DOI: 10.1016/j.radmeas.2020.106246] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Isaji T, Wakasugi T, Fukumi K, Kadono K. Reversible redox and clusterization of silver in glasses by X-ray irradiation and heat treatment: Mechanism of photochromic behavior of halogen-free silver-doped glass. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2011.11.083] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Abstract
The methods of pulse radiolysis, low temperature optical and electron spin resonance spectroscopy and chemical analysis of stable products have been applied to an investigation of the
γ
-radiolysis of liquid and glassy methanol. Processes induced by generation of presumed intermediates by photoionization of solutes have been studied using the same techniques. Electrons are trapped in glassy methanol after
γ
-irradiation at 77 K with a yield
G(e¯
t
)
= 2.7 ± 0.3 and on warming are rendered mobile, ultimately forming an amount of hydrogen equal to
1/2G(e¯
t
)
. In contrast, illumination of the irradiated sample at 77 K with visible light decomposes the trapped electron, forming hydrogen and CH
2
OH or CH
2
O
-
in yield equal to
G(e¯
t
)
. The solvated electron in liquid methanol also reacts with the solvent, at a rate faster than the corresponding reaction in water. The addition of sodium methoxide to liquid methanol results in a marked increase in both the yield and lifetime of the solvated electron observed after 0.2
μ
s irradiation pulse. The optical absorptions and decay parameters of CH
2
OH and CH
2
O
-
in liquid methanol were obtained; the ultraviolet absorption observed in irradiated methanol glass after removal of the trapped electrons by photo-bleaching is probably due to these two species. Solutions of methanol glass containing silver perchlorate exhibit complex optical and e. s. r. spectra, which provide evidence for several different species, but a complete analysis has not been possible. The radicals expected from the initial ionization event are considered. The results of this work together with published data are used to predict the reaction of the free radicals CH
3
O. , CH
2
OH, CH
2
O-, H. and
e¯
s
or e¯
t
in the systems of interest and the relevance of these reactions to some aspects of the radiation chemistry of methanol is discussed.
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Ahmed AA, Allah EWA. Origin of Absorption Bands Observed in the Spectra of Silver Ion-Exchanged Soda-Lime-Silica Glass. JOURNAL OF THE AMERICAN CERAMIC SOCIETY 1995; 78:2777-2784. [DOI: 10.1111/j.1151-2916.1995.tb08054.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Narayana M, Kevan L. On the stabilization of Ag0 in Y zeolites: Electron spin resonance observations. J Chem Phys 1985. [DOI: 10.1063/1.449301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Popitsch A, Nachbaur E, Nei�l W, Fritzer HP. Spectroscopical investigations on silver sulfamides. MONATSHEFTE FUR CHEMIE 1980. [DOI: 10.1007/bf00903658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Doi Y, Aoba T, Takahashi J, Okazaki M, Moriwaki Y. Analysis of electron-excess and electron-deficient centers in X-ray irradiated tricalcium phosphates by electron spin resonance spectroscopy. Calcif Tissue Int 1979; 29:239-44. [PMID: 229946 DOI: 10.1007/bf02408086] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Ezra FS, Bernhard WA. Electron spin resonance study of γ‐irradiated alkyl phosphates: (C2H5O)ṖO2− radical in magnesium diethyl phosphate (MgDEP). J Chem Phys 1973. [DOI: 10.1063/1.1680518] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kobayashi Y, Matsuura N. Chemical Approach to the Radiolysis of Polyphosphate Glass. I. Effects of Sb(III, V), Mo(V, VI) and U(IV, VI) Ions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1973. [DOI: 10.1246/bcsj.46.1346] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Matsuura N, Yoshimura M, Takizawa M, Sakaki Y. Formation of Hypophosphate in the Radiolysis of Phosphite Solution. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1971. [DOI: 10.1246/bcsj.44.1027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Griscom DL, Taylor PC, Bray PJ. Paramagnetic Resonance of Room‐Temperature‐Stable V‐Type Centers in γ‐Irradidated Alkali Halide–Boron Oxide Glasses. J Chem Phys 1969. [DOI: 10.1063/1.1671151] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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