CHARGE-TRANSFER AND FLUORESCENCE BEHAVIOR OF HEXYLAMINE AND 7,7,8,8-TETRACYANOQUINODIMETHANE IN COMPARTMENTALIZED (REVERSE MICELLE AND MICROEMULSION) AND NONAQUEOUS ENVIRONMENTS

The charge transfer interaction between hexylamine (HA) and 7,7,8,8-te tracyanoquinodimethane (TCNQ) and the fluorescence behaviour of the ch arge transfer complex were studied in non-aqueous solvents (dichlorome thane, chloroform, carbon tetrachloride, heptane, iso-octane, decane a nd cyclohexane) and in sodium bis (2-ethyl-hexyl) sulphosuccinate (AOT )-cyclohexane reverse micellar medium and water-AOT-cyclohexane microe mulsion medium. A 1:1 charge transfer complex between HA and TCNQ was formed, and its binding strength was estimated by the Benesi-Hildebran d equation. The charge transfer complex was fluorescent; this was hind ered by AOT and by a higher concentration of HA. The results were anal ysed using the Stem-Volmer equation. At a constant [water]/[AOT] mole ratio (omega), the charge transfer and quenching processes increased a nd decreased respectively with increasing [AOT]. At constant [AOT], bo th phenomena were enhanced with increasing omega. The photophysical pr ocesses were influenced by the water-oil interface containing AOT; in contrast, the medium polarity had no influence.