Oscillating reactions magnetic effects

Flynn and Dickens [142] have translated the relaxation methods of fluid kinetics into terms applicable to solid phase thermogravimetry. The rate-determining variables such as temperature, pressure, gas flow rate, gas composition, radiant energy, electrical and magnetic fields are incremented in discrete steps or oscillated between extreme values and the effect on reaction rate determined. 

Little attention has been devoted to the effects of time-dependent magnetic fields (created by electromagnetic waves) in the absence of a strong magnetic field. Hore and his coworkers [123-125] recently described this effect as the oscillating magnetic field effect (OMFE) on the fluorescence of an exciplex formed in the photochemical reaction of anthracene with 1,3-dicyanobenzene over the frequency range 1-80 MHz. 

Fig. 14.13 The oscillating magnetic field effect (OMFE) in the triplet state radical pair reaction.

The sample s dynamic stiffness is obtained from the measured force and motion amplitudes. The formula for this dynamic stiffness is derived below with reference to the Figure 2 measurement system model. The support impedance element in this model represents the combined effects of the flexibility of the downward force train into the shaker field assembly, the mass of the field assembly, and the oscillating magnetic reaction force exerted on the field assembly from the armature. 

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