In situ observation of the solution convection induced by magnetic force using photoreaction

Abstract The effects of vertical magnetic fields ( ⩽ 1260 T 2 / m ) on the laser-induced convection of a benzene solution were studied by using a photo-induced coloration reaction of CBr 4 and diphenylamine. A green solution, photo-generated at the bottom surface of a vessel, flowed against the magnetic field center. The speed of the solution depended strongly on the intensity and direction of the magnetic force. These effects were discussed in terms of the difference in the magnetic susceptibilities of the green solution and the surrounding one.