TY - JOUR
T1 - J-type aggregation of a simple merocyanine skeleton
T2 - Spectral features and structure of 4-amino-6-oxopyrimidine
AU - Goto, Kenta
AU - Omae, Rieko
AU - Yamaji, Minoru
AU - Shinmyozu, Teruo
N1 - Funding Information:
We wish to thank Dr. Tsutomu Ishi-i (Kurume National College of Technology) for use of the solid states fluorescence spectrometer, and Dr. Miki Hasegawa (Aoyama-Gakuin University) for many helpful discussions. This work was supported by a Grant-in-Aid for Scientific Research (no. 17510087) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2008/2/5
Y1 - 2008/2/5
N2 - The absorption and fluorescence spectral properties of 4-amino-6-oxopyrimidine (1), which has a simple streptopolymethine merocyanine skeleton, clearly showed that the molecule 1 formed the aggregate 1n, and showed an exciton band, appearing at an absorption of 350 nm due to the red-shifted HOMO-LUMO transition. Upon light irradiation of the exciton band, a fluorescence band at 398 nm (ΦFL = 0.10) was observed, and its decay lifetimes were determined. Based on these spectral features, the aggregated 1n was found to be formed by J-type aggregation. The molecular orientation 1 in the crystal was revealed as being both parallel π-π stacking and hydrogen bonding chains.
AB - The absorption and fluorescence spectral properties of 4-amino-6-oxopyrimidine (1), which has a simple streptopolymethine merocyanine skeleton, clearly showed that the molecule 1 formed the aggregate 1n, and showed an exciton band, appearing at an absorption of 350 nm due to the red-shifted HOMO-LUMO transition. Upon light irradiation of the exciton band, a fluorescence band at 398 nm (ΦFL = 0.10) was observed, and its decay lifetimes were determined. Based on these spectral features, the aggregated 1n was found to be formed by J-type aggregation. The molecular orientation 1 in the crystal was revealed as being both parallel π-π stacking and hydrogen bonding chains.
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U2 - 10.1016/j.jphotochem.2007.07.019
DO - 10.1016/j.jphotochem.2007.07.019
M3 - Article
AN - SCOPUS:37349053707
VL - 194
SP - 92
EP - 96
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
SN - 1010-6030
IS - 1
ER -