STUDY OF BELOUSOV-ZHABOTINSKY OSCILLATORS IN WATER ACETONITRILE MEDIUM EMPLOYING EMF AND EPR TECHNIQUES WITH O-VANILLIN, P-VANILLIN AND ADRENALINE AS SUBSTRATES

Authors
LALITHA PV RAMASWAMY R RAMAKRISHNAN G RAO PS
Citation
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
Citations number
17
Categorie Soggetti
Spectroscopy
Journal title
Spectrochimica acta. Part A: Molecular spectroscopy → ACNP
ISSN journal
05848539
Volume
50
Issue
14
Year of publication
1994
Pages
2345 - 2353
Database
ISI
SICI code
0584-8539(1994)50:14<2345:SOBOIW>2.0.ZU;2-P
Abstract
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.