Chromophore aggregation hampers photoisomerization in Langmuir-Blodgett films of stearoyl ester of Disperse Red-13 (DR13St)

Dos Santos DS; Mendonca CR; Balogh DT; Dhanabalan A; Cavalli A; Misoguti L; Giacometti JA; Zilio SC; Oliveira ON

Chemical Physics Letters, Vol.317, No.1-2, 1-5, 2000

DOI10.1016/S0009-2614(99)01368-8 Export Citation

Chromophore aggregation hampers photoisomerization in Langmuir-Blodgett films of stearoyl ester of Disperse Red-13 (DR13St)

Dos Santos DS, Mendonca CR, Balogh DT, Dhanabalan A, Cavalli A, Misoguti L, Giacometti JA, Zilio SC, Oliveira ON

Aggregation of azobenzene chromophores in Langmuir-Blodgett films of stearoyl ester of Disperse Red-13 (DR13St) and cadmium stearate (CdSt) hampers the trans-cis photoisomerization that normally leads to optical storage capabilities, since the required free volume around the chromophore is not available. Such aggregation has been inferred by UV-VIS. spectroscopy and X-ray diffraction. Optical storage properties could still be obtained if DR13St was mixed in a guest-host system with a polycarbonate matrix.