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

Authors
Dos Santos, DS Mendonca, CR Balogh, DT Dhanabalan, A Cavalli, A Misoguti, L Giacometti, JA Zilio, SC Oliveira, ON
Citation
Ds. Dos Santos et al., Chromophore aggregation hampers photoisomerization in Langmuir-Blodgett films of stearoyl ester of Disperse Red-13 (DR13St), CHEM P LETT, 317(1-2), 2000, pp. 1-5
Citations number
24
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
CHEMICAL PHYSICS LETTERS
ISSN journal
00092614 → ACNP
Volume
317
Issue
1-2
Year of publication
2000
Pages
1 - 5
Database
ISI
SICI code
0009-2614(20000128)317:1-2<1:CAHPIL>2.0.ZU;2-Y
Abstract
Aggregation of azobenzene chromophores in Langmuir-Blodgett films of stearo yl ester of Disperse Red-13 (DR13St) and cadmium stearate (CdSt) hampers th e trans-cis photoisomerization that normally leads to optical storage capab ilities, since the required free volume around the chromophore is not avail able. Such aggregation has been inferred by UV-VIS. spectroscopy and X-ray diffraction. Optical storage properties could still be obtained if DR13St w as mixed in a guest-host system with a polycarbonate matrix. (C) 2000 Elsev ier Science B.V. All rights reserved.