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Interlayer energy t...
Interlayer energy transfer between carbazole and two 9-anthroyloxy derivatives in Langmuir-Blodgett films
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- Kilså-Jensen, Kristine, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Albinsson, Bo, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Van der Auweraer, M. (författare)
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visa fler...
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Vuorimaa, E. (författare)
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Lemmetyinen, H. (författare)
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visa färre...
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(creator_code:org_t)
- 1999
- 1999
- Engelska.
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Ingår i: Journal of Physical Chemistry B Materials. - 1089-5647. ; 103:40, s. 8514-8523
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
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- ref (ämneskategori)
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