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Application of Eu coordination polymer

A technology of coordination polymers and crude products, which is applied in the application field of Eu coordination polymers, can solve the problems of poor selectivity and low sensitivity, and achieve the effects of low detection limit, high detection sensitivity and wide application value

Inactive Publication Date: 2013-11-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of poor selectivity and low sensitivity of coordination polymer fluorescent probes to molecules and ions, and to provide an application of Eu coordination polymers

Method used

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  • Application of Eu coordination polymer
  • Application of Eu coordination polymer
  • Application of Eu coordination polymer

Examples

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preparation example Construction

[0060] The Eu coordination polymer of the present invention is prior art (A series of lanthanide coordination polymers with 4'-(4-carboxyphenyl)-2,2':6',2 "-terpyridine: Syntheses, crystal structures and luminescence properties, Inorganic Chemistry Communications, 14(2011), 484-488), the repeating structural unit is EuL 3 , where L is 4'-(4-carboxyphenyl)-2,2':6',2"-terpyridine; it is based on Eu(NO 3 ) 3 ·6H 2 O, L and alkaline substances are raw materials prepared by a hydrothermal method. The invention provides a preparation method thereof, which specifically includes the following steps:

[0061] (1) Add Eu(NO3)3·6H2O, 4'-(4-carboxyphenyl)-2,2':6', 2"-terpyridine and alkaline substances into the reaction vessel, add deionized water Afterwards, stir at room temperature for 10-60min;

[0062] (2) Transfer the obtained mixture to a reaction kettle, raise the temperature to 160°C-200°C, and maintain this temperature for 12-72h;

[0063] (3) After cooling, washing and air-...

Embodiment 1

[0070] to combine image 3 Illustrative Example 1

[0071] With pure water and KNO 3 , NaCl, MgCl 2 , Mg 3 (PO 4 ) 2 , MgCl 2 , Mg(NO 3 ) 2 , MgSO 4, CaCl 2 , BaCl 2 , FeSO 4 , NiCl 2 , Al(NO 3 ) 3 , CrCl 3 , Pb(NO 3 ) 2 , CdCl 2 , Cu(NO 3 ) 2 ,

[0072] Zn(NO 3 ) 2 , AgNO 3 , CoCl 2 , Fe(NO 3 ) 3 , were prepared containing 0.02mol / lK + , containing 0.02mol / lNa + , containing 0.02mol / lMg 2+ , containing 0.06mol / PO 4 3- , containing 0.06mol / lCl - , containing 0.06mol / lSO 4 2- , containing 0.06mol / lNO 3 3- Contains 0.02mol / lCa 2+ , containing 0.02mol / lBa 2+ , containing 0.02mol / lFe 2+ , containing 0.02mol / lNi 2+ , containing 0.02mol / lAl 3+ , containing 0.02mol / lCr 3+ , containing 0.02mol / lPb 2+ , containing 0.02mol / lCd 2+ , containing 0.02mol / lCu 2+ , containing 0.02mol / lZn 2+ , containing 0.02mol / lAg + , containing 0.02mol / lCo 2+ , containing 0.02mol / lFe 3+ solution, 5 mg of Eu coordination polymer was dissolved in 2 ml of pure w...

Embodiment 2

[0075] to combine Figure 4 and Figure 5 Illustrative Example 2

[0076] With pure water and Fe(NO 3 ) 3 Formulated Fe 3+ Fe(NO 3 ) 3 aqueous solution, disperse 5 mg of Eu coordination polymer into 2 ml of the above-mentioned different Fe 3+ concentration of Fe(NO 3 ) 3 In aqueous solution, after soaking for 24 hours, precipitate, wash with pure water, and obtain a solid by centrifugation. After air-drying, at 25°C, the excitation wavelength is fixed at 350nm, and the obtained solid is detected by fluorescence spectrum, and the emission peak of the solid at 612nm is obtained. Relative Strength.

[0077] Figure 4 For embodiment 2 different Fe 3+ concentration of Fe(NO 3 ) 3 The relative intensity of the emission peak at 612nm of the solid obtained in aqueous solution, from Figure 4 It can be seen that with Fe 3+ As the concentration increases, the lower the relative intensity of the solid emission peak is, the more obvious the fluorescence quenching is.

[00...

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Abstract

The invention discloses an application of a Eu coordination polymer, belonging to the technical field of ion detection and solving the technical problem that an existing coordination polymer fluorescence probe has poor selectivity to molecules and ions and low sensitivity. The Eu coordination polymer disclosed by the invention can be taken as the fluorescence probe to detect Fe<3+> by the following steps of: adding the Eu coordination polymer into an aqueous solution containing Fe<3+>, standing for 20-48 hours, then precipitating, washing and separating to obtain solids; and detecting the intensity of a characteristic emission peak of the solids by 350nm excitation wavelength at a site of 612nm, so as to detect the content of Fe<3+> in the aqueous solution. According to the application of the Eu coordination polymer, Fe<3+> in the aqueous solution can be quickly detected; the Eu coordination polymer has the advantages of high detection sensitivity, low detection limit and the like and is capable of detecting Fe<3+> under physiological conditions.

Description

technical field [0001] The invention relates to the application of an Eu coordination polymer and belongs to the technical field of ion detection. Background technique [0002] As an excellent molecular and ion sensor, fluorescent probes have been applied in the field of ion detection due to their remarkable advantages such as fast detection, simple method, easy operation, low cost, good selectivity and high sensitivity. [0003] Due to the long luminescence lifetime of rare earth ions (up to microsecond level), it is significantly different from the background fluorescence; the characteristic emission spectrum is narrow and has high resolution, which has advantages in fluorescence detection, but due to the f-f transition of rare earth ions It is transition forbidden, so its molar absorptivity is very small, and its ability to directly absorb light is very weak. Generally, organic molecules with chromophores are used to chelate with rare earth ions, and the absorbed energy i...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 郑敏孙再成
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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