Abstract
This paper discusses the thermally stimulated restructuring of the molecular
components of layers of symmetric polymethine dicarbocyanine dyes. Heating the layer to
a temperature above 100°C causes a partially reversible conversion of the dimers into
monomeric stereoisomers (the all-trans isomer and the β-cis isomer) and into J
aggregates, as well as restructuring the β-cis isomer into the all-trans isomer. The
restructuring time is tens of minutes. The rate of such conversions depends on the
components present in the layer, the structure of the heterocyclic end groups of the
monomeric molecules, and the temperature.
© 2008 Optical Society of America
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