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Ph sensor made of near-infrared light-emitting ru complex

A technology of binuclear ruthenium complexes and complexes, applied in the field of pH sensing, to achieve the effects of stable structure, easy operation, and guaranteed accuracy

Inactive Publication Date: 2016-02-03
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, there are few reports of near-infrared luminescent ruthenium complex pH sensors. Therefore, it is of great significance to design and synthesize ruthenium complexes that can function as near-infrared luminescent pH sensors.

Method used

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  • Ph sensor made of near-infrared light-emitting ru complex
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  • Ph sensor made of near-infrared light-emitting ru complex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: Complex [(bpy) 2 Ru(HL 1 )Ru(H 2 L 2 )] (ClO4 ) 4 The preparation steps:

[0026] (1) Ligand H 2 L 2 Synthesized according to literature [Addison, A.W.; Burke, P.J. Heterocycl. Chem. 1981, 18, 803-805.].

[0027] (2)[Ru(H 2 L 2 ) Cl 3 ] is RuCl 3 ·3H 2 O and ligand H 2 L 2 According to the 1:1 molar ratio in ethanol in the reflux heating system.

[0028] (3) Ligand HL 1 and [Ru(bpy) 2 HL 1 ](ClO 4 ) 2 According to literature [Zheng, Z.B.; Duan, Z.M.; Zhang, J.M.; Wang, K.Z. ZhiWang, HighlySensitiveandSelectiveDifunctionalRuthenium (II) ComplexBasedChemosensorforDihydrogenPhosphateAnionandFerrousCation, Inorg.Chem.2013, 52, 2306-2316] synthesis.

[0029] (4) Complexes [(bpy) 2 Ru(HL 1 )Ru(H 2 L 2 )] (ClO 4 ) 4 Preparation, weigh [Ru(H 2 L 2 ) Cl 3 [Ru(bpy) 2 HL 1 ](ClO 4 ) 2 (0.161g, 0.15mmol), the mixed solution was heated and refluxed at 180°C for 12 hours under the protection of nitrogen. After the reaction, the solution...

Embodiment 2

[0032] Embodiment 2: The mensuration of ultraviolet-visible absorption spectrum and emission spectrum and the drawing of working curve when different pH

[0033] The acid-base titration of the complex was carried out in Britton-Robinson (abbreviated as BR) buffer solution. BR buffer solution is a mixture of 0.04M glacial acetic acid, 0.04M boric acid and 0.1M sodium chloride. Sodium chloride is used to maintain the ionic strength of the system, thereby reducing the influence of the external environment on the test. Prepare 40ml 3.75×10 -6 The mol / L complex solution to be tested was divided into two parts, and the pH of one part was adjusted with concentrated sulfuric acid, and the ultraviolet-visible absorption and emission spectra of Ph=0.2-2.0 were measured. Another part is adjusted pH with concentrated sodium hydroxide solution, measures the ultraviolet-visible absorption of pH=2.0-7.0 and emission spectrum (excitation wavelength λ ex = 505nm). Measure a data every 0.2 ...

Embodiment 3

[0040] Embodiment 3: the mensuration of unknown water sample pH

[0041] Take 23ml of unknown water sample, add sodium chloride to it to a concentration of 0.1M, and keep the ionic strength consistent with that of BR buffer. Take 3ml of water sample with sodium perchloride as reference solution, add quantitative complex to the remaining 20ml of water sample to make the concentration 3.75×10 -6 mol / L, which is consistent with the concentration in the acid-base titration of the complex. Measure the UV absorption and emission spectra of water samples.

[0042] The quantum efficiency of luminescence is obtained by ruthenium terpyridine [Ru(bpy) 3 ] 2+ as a standard (Φstd =0.028), the measured concentration is 1.0×10 -6 mol / L [Ru(bpy) 3 ] 2+ The UV-visible absorption spectrum and emission spectrum of the aqueous solution, read the absorbance A at 450nm of the UV-visible absorption spectrum std and the integrated intensity I of the emission spectrum std , according to formul...

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Abstract

The invention discloses a preparation method and the near-infrared light-emitting property of a dual-core Ru complex, as well as application of a pH sensor. The application comprises the following steps: calculating light-emitting quantum efficiencies at different pH values by measuring ultraviolet visible absorption spectrums and ultraviolet visible emission spectrums of the dual-core Ru complex at the pH values, and drawing a standard working curve by taking the pH values as abscissa values and the light-emitting quantum efficiencies as ordinate values, so as to detect the pH of an unknown water sample. The application is high in sensitivity and easy to operate.

Description

technical field [0001] The invention relates to the field of pH sensing, in particular to a preparation method of a binuclear ruthenium complex and its application in detecting the pH of water samples. Background technique [0002] The traditional methods for detecting pH include pH meter, pH indicator and pH test paper, etc. The acidity meter used for more accurate pH measurement must use glass electrodes, but glass electrodes may cause mechanical damage due to electrochemical interference, so It is not suitable for the detection of pH in living body. Many life processes in human cells and organelles are closely related to pH. For example, under normal physiological conditions, the pH of the extracellular fluid in the human body is 7.40 ([H + ]=40nmol / L), the pH variation range is generally 0.1-0.2 pH units. Too strong acidity or too strong alkalinity can cause some lesions, which may be life-threatening in severe cases. Another example is that some enzymes have catalyti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F15/00C09K11/06G01N21/33G01N21/64
Inventor 王克志孟婷婷郑泽宝
Owner BEIJING NORMAL UNIVERSITY
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