Tin(II) ion reacts in acidic solution with PAN to give a fluorescent
complex that is insoluble in water. Fig. 1 shows the
excitation and emission spectra of the complex and also PANin a
mixed micellar medium. The excitation and emission maximum
wavelengths are at 300 and 360 nm, respectively. The influence
of time upon complex formation was investigated. The results
indicated that the fluorescence signal is increased by increasing