Magnetic Resonance Imaging of Ruthenium-, Cerium-, and Ferroin-Catalyzed Belousov−Zhabotinsky Reactions

Magnetic resonance imaging studies of the manganese-catalyzed Belousov−Zhabotinsky (B-Z) reaction have been previously reported. In this paper the results of an investigation of the magnetic relaxation properties of cerium, ruthenium, and iron ions as catalysts for the B-Z system are presented. Criteria are given for the selection of imaging parameters which should yield maximum contrast. Magnetic resonance images of the cerium- and ruthenium-catalyzed B-Z reactions are obtained for the first time. However, the attempt to image the ferroin-catalyzed reaction is unsuccessful. The reason for the failure is identified.