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4 results on '"Lin, Mingzhang"'

1. Temperature effect on the absorption spectrum of the hydrated electron paired with a lithium cation in deuterated water

Author

Lin, Mingzhang, Kumagai, Yuta, Lampre, Isabelle, Coudert, Francois-Xavier, Muroya, Yusa, Boutin, Anne, Mostafavi, Mehran, and Katsumura, Yosuke

Subjects
Heavy water -- Chemical properties, Hydrates -- Chemical properties, Absorption spectra -- Research, Molecular dynamics -- Research, Lithium compounds -- Chemical properties, Chemicals, plastics and rubber industries
Abstract

The absorption spectra of the hydrated electron in 1.0 to 4.0 M LiCl or LiCl[O.sub.4] deuterated water solutions were measured by pulse radiolysis techniques from room temperature to 300 degree Celsius at a constant pressure of 25 MPa. The results indicated that when the temperature is increased and the density is decreased, the absorption spectrum of the electron in the presence of a lithium cation is shifted to lower energies.

Published
2007

2. Pulse radiolysis study on the estimation of radiolytic yields of water decomposition products in high-temperature and supercritical water: Use of methyl viologen as a scavenger

Author

Lin, Mingzhang, Katsumura, Yosuke, Muroya, Yusa, Hui He, Guozhong Wu, Han, Zhenhu, Miyazaki, Toyoaki, and Kudo, Hisaaki

Subjects
Radiolysis -- Methods, Decomposition (Chemistry) -- Analysis, Water -- Chemical properties, Methyl groups -- Thermal properties, Chemicals, plastics and rubber industries
Abstract

Methyl viologen (1,1-dimethyl-4-4-bipyridinium dichloride) is used as a scavenger to estimate the radiolytic yields of water decomposition products from room temperature to 400 degree Celsius by pulse radiolysis method. {G(e(sub aq)(super -) + G(OH) + G(H)} is studied using a 0.5 mM MV(super 2+) solution in the presence of 10 mM NaCOOH up to 200 degree Celsius and in the presence of 0.2 M ethanol up to 400 degree Celsius.

Published
2004

3. Temperature dependence of (SCN)(sub 2)(super dot-) in water at 25-400 degree Celsius: absorption spectrum, equilibrium constant, and decay

Author

Wu, Guozhong, Katsumura, Yosuke, Muroya, Yusa, Lin, Mingzhang, and Morioka, Tomomi

Subjects
Absorption spectra -- Analysis, Chemistry, Physical and theoretical -- Research, Anions -- Thermal properties, Anions -- Analysis, Chemicals, plastics and rubber industries
Abstract

The temperature dependence of the absorption spectrum of the formation and decay of dimer anion (SCN)(sub 2)(super dot-) is analysed in the temperature range of 25 to 400 degree Celsius. Analysis showed that the absorption peak shift to longer wavelength (red shift) with increase in temperature.

Published
2001

4. Pulse radiolysis of 4,4'-bipyridyl aqueous solutions at elevated temperatures: Spectral changes and reaction kinetics up to 400 degree C

Author

Lin, Mingzhang, Katsumura, Yosuke, He, Hui, Muroya, Yusa, Han, Zhenhui, Miyazaki, Toyoaki, and Kudo, Hisaaki

Subjects
Chemistry, Physical and theoretical -- Research, Pyridine -- Chemical properties, Aqueous solution reactions -- Research, Radiolysis -- Research, Chemicals, plastics and rubber industries
Abstract

The spectral changes as well as the reaction kinetics of the transient species of 4,4'-bipyridyl (4,4'-bpy) are experimentally investigated by pulse radiolysis techniques up to 400 degree Celsius. The results show that the transient species such as OH adduct 4,4'-bpyOH., monoprotonated electron adduct 4,4'-bpyH. and doubly protonated electron adduct 4,4'-bpyH2+. have 15-20 nm blue shifts from room temperature to 400 degree Celsius.

Published
2005

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