Pulse Radiolysis of Aqueous Thiocyanate Solution

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The pulse radiolysis of N2O saturated aqueous solutions of KSCN was studied under neutral pH conditions. The observed optical absorption spectrum of the SCN• radical in solution is more complex than previously reported, but it is in good agreement with that measured in the gas phase. Kinetic traces at 330 nm and 472 nm corresponding to SCN• and (SCN)2•¯, respectively, were fit using a Monte Carlo simulation kinetic model. The rate coefficient for the oxidation of SCN¯ ions by OH radicals, an important reaction used in competition kinetics measurements, was found to be 1.4 ± 0.1 x 1010 M-1 s-1, ... continued below

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165-168

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Milosavljevic, Bratoljub H. & LaVerne, Jay A. January 13, 2005.

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Description

The pulse radiolysis of N2O saturated aqueous solutions of KSCN was studied under neutral pH conditions. The observed optical absorption spectrum of the SCN• radical in solution is more complex than previously reported, but it is in good agreement with that measured in the gas phase. Kinetic traces at 330 nm and 472 nm corresponding to SCN• and (SCN)2•¯, respectively, were fit using a Monte Carlo simulation kinetic model. The rate coefficient for the oxidation of SCN¯ ions by OH radicals, an important reaction used in competition kinetics measurements, was found to be 1.4 ± 0.1 x 1010 M-1 s-1, about 30 % higher than the normally accepted value. A detailed discussion of the reaction mechanism is presented.

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165-168

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  • Journal Name: Journal of Physical Chemistry A; Journal Volume: 109; Journal Issue: 1

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  • Report No.: DOE/ER/63744-1
  • Grant Number: FG02-04ER63744
  • DOI: 10.1021/jp046088a | External Link
  • Office of Scientific & Technical Information Report Number: 924818
  • Archival Resource Key: ark:/67531/metadc895135

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  • January 13, 2005

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 7, 2016, 1:44 p.m.

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Milosavljevic, Bratoljub H. & LaVerne, Jay A. Pulse Radiolysis of Aqueous Thiocyanate Solution, article, January 13, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc895135/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.