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Triboluminescence of Lanthanide Coordination Polymers with Face‐to‐Face Arranged Substituents
Author(s) -
Hirai Yuichi,
Nakanishi Takayuki,
Kitagawa Yuichi,
Fushimi Koji,
Seki Tomohiro,
Ito Hajime,
Hasegawa Yasuchika
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201703638
Subject(s) - photoluminescence , polymer , luminescence , lanthanide , grinding , materials science , ion , antenna effect , photochemistry , chemistry , optoelectronics , composite material , organic chemistry
Luminescence upon the grinding of solid materials (triboluminescence, TL) has long been a puzzling phenomenon in natural science and has also attracted attention because of its broad application in optics. It has been generally considered that the TL spectra exhibit similar profiles as those of photoluminescence (PL), although they occur from distinct stimuli. Herein, we describe for the first time a large spectral difference between these two physical phenomena using lanthanide III coordination polymers with efficient TL and PL properties. They are composed of emission centers (Tb III and Eu III ions), antenna (hexafluoroacetylacetonate=hfa), and bridging ligands (2,5‐bis(diphenylphosphoryl)furan=dpf). The emission color upon grinding (yellow TL) is clearly different from that upon UV irradiation (reddish‐orange PL) in Tb III /Eu III ‐mixed coordination polymers [Tb,Eu(hfa) 3 (dpf)] n (Tb/Eu=1). The results directly indicate the discrete excitation processes of PL and TL.