Cation-π interaction in mixed system of catanionic surfactant [decyltrimethylammonium bromide (DTAB)-N(4-decyloxy-2-hydroxy- benzylidene) glycine (C_(10)HG)] was investigated by the methods of UV- vis, ~1H NMR and TEM. The experimental results show that DTAB is on the top of C_(10)HG's aromatic ring and there exists cation-π interaction between them. The existence of the interaction promotes the formation of vesicles.

Key words: SURFACTANTS, UV, MS, TEM, DTAB, GLYCINE