Triplet Excitation Energy Transfer in Choleic Acid Crystals 


Vol. 28,  No. 12, pp. 2409-0, Dec.  2007
10.5012/bkcs.2007.28.12.2409


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  Abstract

Time resolved phosphorescence of Dibromobenzophenone (DBBP) choleic acid crystal was observed at 4.2 K as functions of excitation energy and delay time. The experimental results reveal that the energy transfer efficiency is dependent on the excitation energy, i.e. the density of acceptors sites. As the excitation energy or delay time increases, the resonance phosphorescence does not broaden and shift gradually, rather a broad luminescence band develops about 290 cm?1 to lower energy of the resonance phosphorescence. The observation implies that energy transfer from high to low energy sites in this system is controlled by emission of phonons or vibrons. The data of time resolved experiments were analyzed in terms of a mechanism involving direct donor-acceptor excitation transport by exchange coupling. It was concluded that an isotropic twodimensional exchange interaction topology is consistent with energy transfer in this system.

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  Cite this article

[IEEE Style]

S. Kook, "Triplet Excitation Energy Transfer in Choleic Acid Crystals," Bulletin of the Korean Chemical Society, vol. 28, no. 12, pp. 2409-0, 2007. DOI: 10.5012/bkcs.2007.28.12.2409.

[ACM Style]

Seong-Keun Kook. 2007. Triplet Excitation Energy Transfer in Choleic Acid Crystals. Bulletin of the Korean Chemical Society, 28, 12, (2007), 2409-0. DOI: 10.5012/bkcs.2007.28.12.2409.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949