Title: Interlayer energy transfer between carbazole and two 9-anthroyloxy derivatives in Langmuir-Blodgett films
Authors: Jensen, KK ×
Albinsson, B
Van der Auweraer, Mark
Vuorimaa, E
Lemmetyinen, H #
Issue Date: Jan-1999
Publisher: American Chemical Society
Series Title: Journal of Physical Chemistry B, Materials, Surfaces, Interfaces & Biophysical vol:103 issue:40 pages:8514-8523
Abstract: The interlayer excitation energy transfer between 11-(9-carbazole)undecanoic acid (II-CU) and two 9-anthroyloxy derivatives, 9-(9-anthroyloxy)stearic acid (9-AS) and 2-(9-anthroyloxy)stearic acid (2-AS), in alternating multilayer Langmuir-Blodgett films has been studied. The 11-CU fluorescence is quenched by energy transfer to 9-AS or 2-AS as judged by steady-state and picosecond time-resolved fluorescence measurements. The fluorescence decay curves of 11-CU in the films were analyzed in the framework of several models: (1) a general model for interlayer energy transfer, (2) a two-exponential decay, (3) a Forster model for energy transfer in a two-dimensional system, and (4) a stretched-exponential decay, characteristic of Forster energy transfer in self-similar fractal-like structures. The recovered decay parameters suggest an inhomogeneous mixing of the acceptor molecules in LB films leading to a two-phase system. The phase separation during compression of the acceptor monolayers forms regions of acceptor concentration about 3 times that of the intended and regions with very low acceptor concentration.
ISSN: 1089-5647
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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