TY - JOUR
T1 - Unusual photoluminescence characteristics of tetraphenylpyrene (TPPy) in various aggregated morphologies
AU - Oyamada, Takahito
AU - Akiyama, Seiji
AU - Yahiro, Masayuki
AU - Saigou, Mari
AU - Shiro, Motoo
AU - Sasabe, Hiroyuki
AU - Adachi, Chihaya
N1 - Funding Information:
This work was supported by the Integrated industry academia partnership (IIAP), Kyoto University International Innovation Center. We especially thank Prof. Katsumi Tokumaru for his insightful advice.
PY - 2006/4/3
Y1 - 2006/4/3
N2 - We found that 1,3,6,8-tetraphenylpyrene (TPPy) demonstrates unusual photoluminescence (PL) characteristics in the solid-state morphologies. We investigated the PL characteristics of TPPy in various morphologies including powder, deposited film, and solutions. The TPPy powder (A), which was prepared through column chromatography, recrystallization, and train sublimation, showed blue fluorescence with a peak of maximum wavelength of λmax = 451 nm. The TPPy powder (B), which was obtained by thermal annealing of TPPy powder (A) in a quartz tube in nitrogen, showed green fluorescence with λmax = 510 nm. Furthermore, the TPPy powder (B) was reversibly converted into TPPy powder (A) by recrystallization. We conclude that TPPy dimers form locally in the TPPy monomer aggregates during thermal annealing and redissociate into the monomer states during recrystallization.
AB - We found that 1,3,6,8-tetraphenylpyrene (TPPy) demonstrates unusual photoluminescence (PL) characteristics in the solid-state morphologies. We investigated the PL characteristics of TPPy in various morphologies including powder, deposited film, and solutions. The TPPy powder (A), which was prepared through column chromatography, recrystallization, and train sublimation, showed blue fluorescence with a peak of maximum wavelength of λmax = 451 nm. The TPPy powder (B), which was obtained by thermal annealing of TPPy powder (A) in a quartz tube in nitrogen, showed green fluorescence with λmax = 510 nm. Furthermore, the TPPy powder (B) was reversibly converted into TPPy powder (A) by recrystallization. We conclude that TPPy dimers form locally in the TPPy monomer aggregates during thermal annealing and redissociate into the monomer states during recrystallization.
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U2 - 10.1016/j.cplett.2005.12.102
DO - 10.1016/j.cplett.2005.12.102
M3 - Article
AN - SCOPUS:33644989675
SN - 0009-2614
VL - 421
SP - 295
EP - 299
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -