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Ir (III)-Eu (III) thermometal complex and application thereof

A complex, bimetallic technology, applied in the field of rare earth luminescent materials, can solve the problems of interference, high excitation energy, damage to organisms, etc.

Active Publication Date: 2012-10-31
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the absorption wavelengths of organic ligands that can effectively sensitize visible light-emitting rare earth ions are mostly in the ultraviolet region, and the excitation energy is relatively high, which is unfavorable for their application in the biological field, because high excitation energy will not only affect damage, and will also cause autofluorescence in some biological tissues, resulting in interference

Method used

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  • Ir (III)-Eu (III) thermometal complex and application thereof
  • Ir (III)-Eu (III) thermometal complex and application thereof
  • Ir (III)-Eu (III) thermometal complex and application thereof

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Experimental program
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Embodiment 1

[0057] The synthetic route involved in the present embodiment is as follows:

[0058]

[0059] (1) Iridium complex [Ir(dfppy) 2 (cbbipy)] synthesis

[0060] 4-carboxy-2,2' bipyridine (Journal of Organic Chemistry, 1999, 64, 1015), iridium complex dimer [(dfppy) 2 Ir(μ-Cl) 2 Ir(dfppy) 2 ] (B Chem Soc Jpn, 1974,47,767) were all synthesized according to the reference method. Other commonly used reagents were of analytical grade and were not further processed before use.

[0061] 2.2mmol 4-carboxy-2,2' bipyridine, 1.00mmol iridium complex dimer [(dfppy) 2 Ir(μ-Cl) 2 Ir(dfppy) 2 ] and 10 mmol of sodium carbonate were mixed in an appropriate amount of ethylene glycol monoethyl ether, and heated to reflux for 12 hours under the protection of an inert gas. After the system was cooled to room temperature, it was poured into water to precipitate a khaki precipitate, which was filtered and dried to obtain a crude product. Crude product with CH 2 Cl 2 / CH 3 The eluent of OH...

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Abstract

The invention discloses an Ir (III)-Eu (III) thermometal complex and an application thereof. A structural formula of the Ir (III)-Eu (III) thermometal complexes is [(L1L2) Ir (Mu-B)] mEu (D1D2D3) En, wherein B represents a carboxy-substituted bridging ligand derived from bipyridyl; L1 and L2 represent a cyclometalated ligand combined with Ir; D1, D2 and D3 represent anionic ligands; E represents a neutral ligand; m equals to 1, 2 or 3; n is an integer ranging from 0-8; and the specific values depend on coordination structures and the overall coordination environment of the ligands, totally the coordination number of an Eu (III) ion ranges from 6 to 12. The europium complex has efficient photoluminescence quantum yield, and can realize visible light excitation of a long wavelength, and can be used as functional material for photoluminescence.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to an iridium-europium double metal complex luminescent material. technical background [0002] Rare earth luminescence based on f-f transition characteristics has the characteristics of good color purity and long luminescence lifetime, and has been a research hotspot in recent decades. However, due to parity prohibition, the luminescence of individual rare earth ions is very weak. Rare earth complexes can take advantage of the large molar extinction coefficient of organic ligands to effectively absorb light energy. First, the ligands are excited to an excited state, and then the ligands coordinated with rare earth ions transfer energy to rare earth ions, which excite the rare earth ions to emit light. However, the absorption wavelengths of organic ligands that can effectively sensitize visible light-emitting rare earth ions are mostly in the ultraviolet region, and ...

Claims

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Application Information

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IPC IPC(8): C07F19/00C07F15/00C09K11/06
Inventor 卞祖强卫慧波刘志伟黄春辉
Owner PEKING UNIV
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