Abstract:
Herein, a new b-diketonate ligand, namely, 1-(4-(diphenylphosphino)phenyl)-4,4,5,5,5-pentafluoropentane-1,3-dione (DPPFH) has been synthesized and utilized for the construction of an antenna
complex of Eu
3+
[Eu(DPPF)3(DDXPO)] in the presence of a chelating ligand, 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene oxide (DDXPO). The developed Eu
3+
compound has been well characterized and
investigated the photophysical properties. The designed Eu
3+
complex displays bright red luminescence
upon irradiation at the ligand-centered band at 375 nm with a quantum yield of 39% in the solid-state.
Interestingly, the ternary Eu
3+
complex also exhibits brilliant triboluminescence in the daylight, which
could be useful in the design of pressure and damage detection probes. In addition, the newly obtained
Eu
3+
complex was embedded into a PMMA matrix to form highly luminescent films having quantum
yields as high as 45–50%. These plastic materials display enhanced thermal stability as compared to
parent compound. The ground state coordination geometry of the typical Eu
3+
complex was calculated
using the Sparkle/RM1 model. The excellent agreement between the experimental and theoretically
predicted photophysical data, attesting the efficacy of the theoretical approach implemented in the
LUMPAC software (http://lumpac.pro.br)
