Microemulsion provides a rigid environment to solubilizates. The Schif
f bases with long alkyl chain at ortho and para positions in the benze
ne nucleus showed different spectral behaviour in microemulsions and o
rganic solvents. The ortho substituted compounds showed more structure
d characteristics than the para substituted compounds. From the spectr
al data, four different zones in a microemulsion medium have been prop
osed. These four zones have different solvation capacity for the Schif
f bases.