ANALYSIS OF FLUORESCENCE DECAYS OF CHLOROPHYLL-A AND BETA-CAROTENE INNEMATIC LIQUID-CRYSTAL

The chlorophyll a (Chi a) and its mixture with beta-carotene were embe dded in nematic liquid crystal - anisotropic matrix. The decays of flu orescence were measured at two wavelengths:680nm and 715nm and analyze d using biexponential and fractal models. Fractal model fits better to decay of fluorescence emitted at 680nm by samples with Chi a alone. F or all other cases (decay observed at 680nm and 715nm luminescence of the pigment mixture and 715nm luminescence of Chi a alone) both models describe measured decays with similar adequacy. It seems that beta-ca rotene molecules perturb the regular arrangement of chlorophyll in nem atic solvent.