STUDY OF BELOUSOV-ZHABOTINSKY OSCILLATORS IN WATER ACETONITRILE MEDIUM EMPLOYING EMF AND EPR TECHNIQUES WITH O-VANILLIN, P-VANILLIN AND ADRENALINE AS SUBSTRATES
Pv. Lalitha et al., STUDY OF BELOUSOV-ZHABOTINSKY OSCILLATORS IN WATER ACETONITRILE MEDIUM EMPLOYING EMF AND EPR TECHNIQUES WITH O-VANILLIN, P-VANILLIN AND ADRENALINE AS SUBSTRATES, Spectrochimica acta. Part A: Molecular spectroscopy, 50(14), 1994, pp. 2345-2353
The oscillatory behaviour of three substrates, ortho-vanillin, para-va
nillin and adrenaline, in mixed media (water plus 20% acetonitrile) ha
s been investigated using EPR and EMF techniques. All these substrates
exhibit two types of oscillation involving Br2/Br- and Mn(III)/Mn(II)
redox couples. From the oscillatory characteristics (total time, numb
er of oscillations and time per oscillation) obtained by employing the
se techniques, the reactivities of the vanillins have been correlated.
The Field-Koros-Noyes mechanism, suggested for catalysed systems in p
ure aqueous medium, is established to be applicable even in mixed medi
a.