CPC C09K 11/06 (2013.01) [C07F 5/003 (2013.01); C07F 9/5345 (2013.01); F21K 2/00 (2013.01); C09K 2211/182 (2013.01)] | 26 Claims |
6. A rare earth complex comprising:
a rare earth ion,
a diphosphine dioxide ligand, and
a β-diketone ligand
wherein two phosphorus atoms contained in said diphosphine dioxide ligand individually have substituents different from each other, which is a polynuclear complex comprising two or more rare earth ions and having a structure in which two rare earth ions are bridged with said diphosphine dioxide ligand alone.
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7. A rare earth complex mixture which contains two or more rare earth complexes comprising
rare earth ions,
diphosphine dioxide ligands, and
β-diketone ligands
wherein said mixture contains at least two rare earth complexes selected from the group consisting of:
(a) a first rare earth complex comprising
said rare earth ion,
one of said diphosphine dioxide ligands, and
three of said β-diketone ligands;
(b) a second rare earth complex comprising
said rare earth ion,
two of said diphosphine dioxide ligands, and
two of said β-diketone ligands; and
(c) a third rare earth complex comprising
said rare earth ion,
one of said diphosphine dioxide ligands, and
two of said β-diketone ligands
provided that
two phosphorus atoms contained in each said diphosphine dioxide ligand individually have substituent sets different from each other.
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