TY - JOUR
T1 - Electron spin resonance studies of inorganic radicals in irradiated aqueous solutions. I. Direct observation
AU - Behar, D.
AU - Fessenden, Richard W.
PY - 1972
Y1 - 1972
N2 - A search has been carried out for the esr spectra of radical intermediates present during steady-state, in situ radiolysis of aqueous solutions of inorganic salts. The technique used is capable of detecting radicals which react by diffusion-controlled recombination if the esr line widths are small (<1 G). In fact out of 15 systems studied, only four gave detectable esr signals. One is forced to conclude that the esr lines of the radicals formed in the other systems are broad. The radicals successfully studied are ·SO3- (from OH + SO32-, g = 2.00306), ·PO32- (from OH + HPO32-, aP = 567.6 G, g = 2.00154), ·HPO2- (from OH + H2PO2-, aP = 480.4, aH = 89.7 G, g = 2.00293), and -·CS2- (from eaq- + CS2, g = 2.00804). No esr lines were detected from solutions of HCO2-, CO32-, S2-, Se2-, SeO32-, Br-, I-, SCN-, OCN-, N3-, HO3-, NO2-, NH2OH, or AsO2-. Steady-state measurements of radical concentrations have been used to determine rates of radical recombination for the species ·SO3-, ·PO32-, and ·HPO2-.
AB - A search has been carried out for the esr spectra of radical intermediates present during steady-state, in situ radiolysis of aqueous solutions of inorganic salts. The technique used is capable of detecting radicals which react by diffusion-controlled recombination if the esr line widths are small (<1 G). In fact out of 15 systems studied, only four gave detectable esr signals. One is forced to conclude that the esr lines of the radicals formed in the other systems are broad. The radicals successfully studied are ·SO3- (from OH + SO32-, g = 2.00306), ·PO32- (from OH + HPO32-, aP = 567.6 G, g = 2.00154), ·HPO2- (from OH + H2PO2-, aP = 480.4, aH = 89.7 G, g = 2.00293), and -·CS2- (from eaq- + CS2, g = 2.00804). No esr lines were detected from solutions of HCO2-, CO32-, S2-, Se2-, SeO32-, Br-, I-, SCN-, OCN-, N3-, HO3-, NO2-, NH2OH, or AsO2-. Steady-state measurements of radical concentrations have been used to determine rates of radical recombination for the species ·SO3-, ·PO32-, and ·HPO2-.
UR - http://www.scopus.com/inward/record.url?scp=33947088937&partnerID=8YFLogxK
U2 - 10.1021/j100656a006
DO - 10.1021/j100656a006
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AN - SCOPUS:33947088937
SN - 0022-3654
VL - 76
SP - 1706
EP - 1710
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
IS - 12
ER -