期刊
INORGANIC CHEMISTRY
卷 59, 期 9, 页码 5865-5871出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.9b03492
关键词
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资金
- Institute for Chemical Reaction Design and Discovery (ICReDD)
- MEXT, Japan
- Northern Advancement Center for Science & Technology of Hokkaido, Japan
- [17K14467]
- [19H04556]
- [18H04497]
- [18H02041]
Luminescent Eu(III) complexes with a ligand-to-metal charge transfer (LMCT) state were demonstrated for the development of a molecular thermometer. The Eu(III) complex was composed of three anionic ligands (hfa: hexafluoroacetylacetonate) and a phosphine oxide derivative containing a chrysene framework (diphenylphosphorylchrysene (DPCO)). The chrysene framework induced a rigid coordination structure via intermolecular interactions, resulting in a high thermal stability (decomposition point: 280 degrees C). The Eu(III) complex also exhibited an extremely high molar absorption coefficient (490000 cm(-1) M-1), high intrinsic emission quantum yields (73%), and temperature-dependent energy migration between ligands and Eu(III) ion. The characteristic energy migration system was explained by the presence of the LMCT state based on pi-f orbital interactions.
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