Compositions – Organic luminescent material containing compositions
Reexamination Certificate
2008-07-23
2011-12-20
Koslow, Carol M (Department: 1734)
Compositions
Organic luminescent material containing compositions
C313S503000, C313S486000, C534S015000
Reexamination Certificate
active
08080173
ABSTRACT:
The present invention provides a fluorescent substance excellent in emission intensity and in emission efficiency. The substance can be excited by light at a longer wavelength than ever. The present invention also provides a luminous composition comprising the fluorescent substance and a light-emitting element using the substance. The fluorescent substance comprises a rare earth metal and a phosphine oxide ligand which coordinates to said rare earth metal and said ligand containing at least one siloxane bond in its structure. The fluorescent substance can be produced from a reaction between a compound having a siloxane bond and a rare earth complex coordinated by a phosphine oxide ligand. The luminous composition comprises the fluorescent substance.
REFERENCES:
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U.S. Appl. No. 12/716,728, filed Mar. 3, 2010, Iwanaga, et al.
U.S. Appl. No. 11/958,111, filed Dec. 17, 2007, Shinji Murai.
Philip Lenaerts, et al. “Luminescent europium (III) and terbium (III) nicotinate complexes covalently linked to a 1,10-phenanthroline functionalised sol-gel glass”, Journal of Luminescence, 2006, vol. 117, pp. 163-169.
N. Filipescu et al.-“Substituent Effects on Intramolecular Energy Transfer. II. Fluorescence Spectra of Europium and Terbiumβ-Diketone Chelates”, The Journal of Physical Chemistry vol. 68, No. 11, Nov. 1964, pp. 3324-3346.
H. Iwanaga et al.-“Development of ultraviolet LED devices containing europium (III) complexes in fluorescence layer”, Journal of Alloys and Compounds, 408-412, (2006), pp. 921-925.
Amano Akio
Iwanaga Hiroki
Murai Shinji
Sato Takahiro
Kabushiki Kaisha Toshiba
Koslow Carol M
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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