Cyclodextrin Induced Micelle Formation as Studied by TICT Fluorescent Probe

beta-cyclodextrin (beta-CD) induced aggregation and micelle formation a detyltrimethylammonium bromide {CTMAB} in aqueous solution is demonstrated by the dual fluorescence of p-N N-dimethylaminobenzoic acid (DMABOA) typical of the twisted intramolecular charge transfer (TICT). The locally excited (LE) state of DMABOA is proved to have the characteristic of intramolecular charge transfer (ICT) with a polarity higher than that of ground state hut lower than that of TICT state. The peak positions of the two flourescence bands and their intensity ratio are employed to probe the interaction a beta-CD with CTMAB, It is concluded that 3-CD induces CTMAB aggregation as well as micelle formation and may charge micelle structure. The results structure The results also indicate that TICT in aqueous solution may bp affected by he anisotropy viscosity DE the medium, increasing viscosity disadvantaging the TICT process.