REVERSION OF MAGNETIC-FIELD EFFECTS OBSERVED IN THE REACTION OF A TRIPLET-BORN R

2020-03-25 07:34:45

10 Japan Of kinetics MFEs

责任者: WAKASA, M;HAYASHI, H;MIKAMI, Y;TAKADA, T 单位: RIKEN,INST PHYS & CHEM RES,MOLEC PHOTOCHEM LAB,WAKO,SAITAMA 35101,JAPAN.;RIKKYO UNIV,FAC SCI,DEPT CHEM,TOKYO 171,JAPAN. 来源出处: JOURNAL OF PHYSICAL CHEMISTRY, v 99, AUG 31 1995, p 13181- 13186 摘要: Magnetic field effects (MFEs) on the triplet sensitization of p-aminophenyl disulfide were investigated in a sodium dodecylsulfate (SDS) micellar solution by means of a nanosecond laser flash photolysis technique at high magnetic fields up to 10 T. The yield of the escaped (P-aminophenyl)thiyl radical increased steeply with increasing magnetic field strength (B) from 0 to 1 T, but decreased gradually from 1 to 10 T. At 10 T, the yield of the escaped radical became similar to that at 0 T. The MFEs observed at both low (B less than or equal to 1 T) and high (1 T < B < 10 T) fields were simultaneously quenched by the addition of a paramagnetic Gd3+ ion, Thus, these reverted MFEs were interpreted by the relaxation mechanism through anisotropic hyperfine and Zeeman interactions. 关键词: M-IODOTOLUENE ION; KINETIC ENERGY RELEASE DISTRIBUTION; PHOTODISSOCIATION KINETICS; RATE CONSTANT; RRKM THEORY PHOTODISSOCIATION KINETICS; RATE CONSTANT; RRKM THEORY; MICELLAR SOLUTION