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Citation: Jiang Yun-Bao, Wang Xiu-Juan. Cyclodextrin Induced Micelle Formation as Studied by TICT Fluorescent Probe[J]. Acta Physico-Chimica Sinica, ;1994, 10(08): 716-719. doi: 10.3866/PKU.WHXB19940809 shu

Cyclodextrin Induced Micelle Formation as Studied by TICT Fluorescent Probe

1.
Department of Chemistry,Institute of Analytical Chemistry,Xiamen University,Xiamen 361005

Received Date: 4 April 1993
Available Online: 15 August 1994

β-cyclodextrin (β-CD) induced aggregation and micelle formation of cetyltrimethylammnium 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 but lower than that of TICT state. The peak positions of the two fluorescence bands and their intensity ratio are employed to probe the interaction of β-CD with CTMAB. It is conc1uded that β-CD induces CTMAB aggregation as well as micelle formation and may change micelle structure. The results also indicate that TICT in aqueous solution may be affected by the anisotropy or viscosity of the medium, increasing viscosity disadvantaging the TICT process.
- Micelle formation,
- Cyclodextrin inducement,
- Fluorescent probe,
- Twisted intramolecular charge transfer
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