DYNAMICS OF WATER CONFINED IN NONIONIC AMPHIPHILES SUPRAMOLECULAR STRUCTURES

Light scattering studies of water properties in supramolecular structu res of the aqueous solutions of polyoxyethylene non-ionic amphiphiles C(10)E(5) are presented. Raman and Depolarized Rayleigh spectra are st udied to obtain the OH stretching vibrational contribution and the rot ational relaxational time of water along an isothermal path, crossing the isotropic one-phase region from 0 to 1 amphiphile volume fraction phi, and at the structural phase transitions at relatively large amphi philes concentrations. Data analysis of the vibrational mode points ou t that the structure of bound water presents a local fourfold-coordina ted environment, whereas the water rotational dynamics evidences a beh avior that depends on the packing effects of the amphiphile aggregates .