Materials 2010, 3(8), 4080-4108; doi:10.3390/ma3084080
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Emission Properties, Solubility, Thermodynamic Analysis and NMR Studies of Rare-Earth Complexes with Two Different Phosphine Oxides

Corporate Research & Development Centre, Toshiba Corporation, 1 Komukai-Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, Japan
Received: 14 June 2010; Accepted: 16 July 2010 / Published: 26 July 2010
(This article belongs to the Special Issue Luminescent Materials)
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Abstract: The paper proposes novel molecular designs for rare-earth complexes involving the introduction of two different phosphine oxide structures into one rare-earth ion. These designs are effective for improving solubility and emission intensity. Additionally, the complexes are indispensable for realizing high performances in LEDs and security media. The thermodynamic properties of Eu(III) complexes are correlated with the solubility. Correlations between coordination structures and emission intensity were explained by NMR analysis. The luminous flux of red LED devices with Eu(III) complexes is very high (20 mA, 870 m lumen). A new white LED has its largest spectra intensity in the red region and a human look much more vividly under this light.
Keywords: Eu(III) complex; Tb(III) complex; bis-phosphine oxide; solubility; emission intensity; LED

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MDPI and ACS Style

Iwanaga, H. Emission Properties, Solubility, Thermodynamic Analysis and NMR Studies of Rare-Earth Complexes with Two Different Phosphine Oxides. Materials 2010, 3, 4080-4108.

AMA Style

Iwanaga H. Emission Properties, Solubility, Thermodynamic Analysis and NMR Studies of Rare-Earth Complexes with Two Different Phosphine Oxides. Materials. 2010; 3(8):4080-4108.

Chicago/Turabian Style

Iwanaga, Hiroki. 2010. "Emission Properties, Solubility, Thermodynamic Analysis and NMR Studies of Rare-Earth Complexes with Two Different Phosphine Oxides." Materials 3, no. 8: 4080-4108.

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