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Rare earth (III)-transition (II) mixed metal fluorescence complex and preparing method and application thereof

A transition metal ion, mixed metal technology, applied in fluorescence/phosphorescence, organic chemistry methods, chemical instruments and methods, etc., can solve problems to be further studied, and achieve high yield, high fluorescence emission intensity, selectivity and sensitivity high effect

Inactive Publication Date: 2016-04-20
TIANJIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the research on luminescent complexes has made remarkable achievements, but mixed metal complex luminescent materials are used as fluorescent probe compounds, and these compounds are applied in practice to identify metal cations with high sensitivity and high selectivity. Good service to the progress of production and the improvement of living standards still needs further research

Method used

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  • Rare earth (III)-transition (II) mixed metal fluorescence complex and preparing method and application thereof
  • Rare earth (III)-transition (II) mixed metal fluorescence complex and preparing method and application thereof
  • Rare earth (III)-transition (II) mixed metal fluorescence complex and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 8-hydroxyquinoline as ligand {Dy 2 co 2} Synthesis of fluorescent complex A:

[0028] 8-Hydroxyquinoline (0.3 mmol, 43.5 mg), cobalt nitrate hexahydrate (0.2 mmol, 58.2 mg), and dysprosium nitrate hexahydrate (0.2 mmol, 91.3 mg) were dissolved in anhydrous methanol (15.0 mL) , with NaHCO 3 The pH of the reaction mixture was adjusted to 5 by the solid, and it was sealed in a hydrothermal kettle after stirring for several minutes. Water heating kettle at 120 o After three days of incubation at C, at 4.0°C·h –1 The temperature was lowered to room temperature by the rate program, and the red blocky crystals were obtained, which were then washed with anhydrous methanol and dried in air.

Embodiment 2

[0030] {Dy based on 8-hydroxyquinoline as a ligand 2 Ni 2} Synthesis of fluorescent complex B:

[0031] 8-Hydroxyquinoline (0.3 mmol, 43.5 mg), nickel nitrate hexahydrate (0.2 mmol, 58.2 mg), and dysprosium nitrate hexahydrate (0.2 mmol, 91.3 mg) were dissolved in anhydrous methanol (15.0 mL) , with NaHCO 3 The pH of the reaction mixture was adjusted to 5 by the solid, and after stirring for several minutes, it was sealed in a hydrothermal kettle. Water heating kettle at 140 o After 3 days of incubation at C, at 3.2°C·h –1 The rate program cooled down to room temperature to obtain green blocky crystals, which were then washed with anhydrous methanol and dried in air.

Embodiment 3

[0033] {Tb based on 8-hydroxyquinoline ligand 2 co 2} Synthesis of fluorescent complex C:

[0034] 8-Hydroxyquinoline (0.3 mmol, 43.5 mg), cobalt nitrate hexahydrate (0.2 mmol, 58.2 mg) and terbium nitrate hexahydrate (0.2 mmol, 90.6 mg) were dissolved in anhydrous methanol (15.0 mL), with NaHCO 3 The pH of the reaction mixture was adjusted to 6 by the solid, and it was sealed in a hydrothermal kettle after stirring for several minutes. Water heating kettle at 120 o After three days of incubation at C, at 4.0°C·h –1 The rate program cooled down to room temperature to obtain red blocky crystals, which were then washed with anhydrous methanol and dried in air.

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Abstract

The invention relates to a preparing method of a rare earth (III)-transition (II) mixed metal fluorescence complex constructed by means of 8-hydroxyquinoline ligand and the application of the complex in fluorescence probes. The chemical formula of the complex is [Ln2M2(CH3OH)2(eq)4(NO3)4(CH3O)2], wherein Ln is plus trivalence lanthanide rare earth ion Dy(III) or Tb(III), M is plus bivalence transition metal ion Co(II) or Ni(II), eq is minus univalency negative ion of 8-hydroxyquinoline, and CH3O is deprotonated methyl alcohol negative ion. The complex is prepared by means of the solvothermal method, the yield is high, and fluorescence emission intensity is high. The mixed metal complex can recognize copper (II) ions or iron (III) ions in a highly selective mode in weak solution, and therefore the mixed metal complex can be applied to positive ion recognition and detection as a fluorescence probe compound.

Description

[0001] The application for this invention has been supported by the National Natural Science Foundation of China (fund numbers: 21571140, 21531005 and 21371134) and the Tianjin Higher Education Science and Technology Development Fund Project (fund number: 2012ZD02). technical field [0002] The invention relates to the technical field of luminescent metal complexes and fluorescent probes, in particular to mixed metal fluorescent complexes jointly constructed by rare earth metal ions (III) and transition metal ions (II), as well as their preparation methods and applications. In dilute solution, the complex has strong fluorescence emission behavior, and can selectively recognize specific metal cations to cause the quenching of its fluorescence signal. Therefore, this type of complex can be used as a probe compound for metal cations, and has been widely used in the field of ion recognition and detection. Background technique [0003] Fluorescent probes for metal ions have attra...

Claims

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Application Information

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IPC IPC(8): C07F19/00C09K11/06G01N21/64
CPCC07F15/045C07B2200/13C07F15/065C09K11/06G01N21/6428
Inventor 赵小军杨恩翠徐瑶瑶李言
Owner TIANJIN NORMAL UNIVERSITY
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