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Kobayashi T, Taneichi T, Takasaka S. Exciton energy transfer between optically forbidden states of molecular aggregates. J Chem Phys. 2007;126(19):194705doi: 10.1063/1.2730815.
Kobayashi, T., Taneichi, T., & Takasaka, S. (2007). Exciton energy transfer between optically forbidden states of molecular aggregates. The Journal of chemical physics, 126(19), 194705. https://doi.org/10.1063/1.2730815
Kobayashi, Takayoshi, et al. "Exciton energy transfer between optically forbidden states of molecular aggregates." The Journal of chemical physics vol. 126,19 (2007): 194705. doi: https://doi.org/10.1063/1.2730815
Kobayashi T, Taneichi T, Takasaka S. Exciton energy transfer between optically forbidden states of molecular aggregates. J Chem Phys. 2007 May 21;126(19):194705. doi: 10.1063/1.2730815. PMID: 17523826.
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J Chem Phys. 2007 May 21;126(19):194705. doi: 10.1063/1.2730815.

Exciton energy transfer between optically forbidden states of molecular aggregates.

The Journal of chemical physics

Takayoshi Kobayashi, Takashi Taneichi, Shigehiro Takasaka

Affiliations

  1. ICORP, JST, Kawaguchi Center Building, 4-1-8 Honcho, Kawaguchi-shi, Saitama 332-0012, Japan.

PMID: 17523826 DOI: 10.1063/1.2730815

Abstract

3-ethyl-2-[3-(3-ethyl-2(3H)-benzoxazolylidene)-1-propenyl]benzoxazolium iodide (dye I) and pseudoisocyanine bromide are employed to form H aggregates as donors and J aggregates as acceptors. The energy of an H band of the H aggregates is higher than that of a J band of the J aggregates. It was confirmed that excitation of the H band does not emit fluorescence by comparison of excitation spectra of dye I H aggregates with that of dye I monomer. Absorption, fluorescence, and excitation spectra of spin-coated films of H aggregates mixed with various quantities of J aggregates have been observed. Excitation spectra probed at the J band are found to have a component of the H band. Fluorescence spectra originated from excitation of the H band are extracted and qualitatively analyzed. It is confirmed that excitation of the H band causes to emit fluorescence of a J band of the J aggregates. These phenomena show that exciton energy can transfer from the lowest energy in electronic states of the H aggregate, which state is optically forbidden, to electronic state of the J aggregate.

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