EFFECTS OF MAGNETIC-FIELD ON WATER INVESTIGATED WITH FLUORESCENT-PROBES

Aqueous solutions with dissolved fluorescent probes were exposed to a magnetic field, and the effects of the magnetic exposure were investig ated by measuring the fluorescence emission intensity with a spectrofl uorophotometer. The data were compared with those of magnetic exposure effects on colloidal solutions reported previously [K. Higashitani, K . Okuhara and S. Hatade, J. Colloid Interface Sci., 152 (1992) 125; K. Higashitani, H. Isari, K. Okuhara, A. Kage and S. Hatade, J. Colloid Interface Sci., 172 (1995) 383]. It is found that (1) the degree of ma gnetic effects increases with the magnetic exposure and becomes consta nt at a certain exposure time in the case of solutions of fluorescent probes with an alkyl chain, but no effect was observed for solutions o f probes without an alkyl chain; (2) the magnetic effects decay with t he concentration of alcohol in the solution, the solution temperature, and the standing time of the solution after the magnetic exposure; an d (3) if it is presumed that an ordered structure of water molecules a round the hydrophobic chain of probes is formed by the magnetic exposu re, not only are the results in the present study but also are our pre vious results for colloidal particles explained consistently.