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Simple preparation method for synthesizing CdTe quantum dot fluorescence probe at normal temperature and application of CdTe quantum dot fluorescence probe

A technology of fluorescent probes and quantum dots, which can be used in fluorescence/phosphorescence, chemical instruments and methods, luminescent materials, etc., and can solve the problems of complex synthesis methods of quantum dots.

Inactive Publication Date: 2014-07-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis method of its quantum dots is complex, such as the need to prepare precursors, nitrogen protection, heating, etc.

Method used

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  • Simple preparation method for synthesizing CdTe quantum dot fluorescence probe at normal temperature and application of CdTe quantum dot fluorescence probe
  • Simple preparation method for synthesizing CdTe quantum dot fluorescence probe at normal temperature and application of CdTe quantum dot fluorescence probe
  • Simple preparation method for synthesizing CdTe quantum dot fluorescence probe at normal temperature and application of CdTe quantum dot fluorescence probe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1.1415g CdCl 2 2.5H 2 O is dissolved in 50mL water to obtain 0.1mol / L CdCl 2 solution; 0.139mL pure TGA was dissolved in 50mL water to obtain a 0.04mol / L TGA solution; 0.0445gNa 2 TeO 3 Dissolve in 50mL water to get 0.004mol / L Na 2 TeO 3 solution, set aside.

[0025] 0.2mL CdCl 2 solution, 20mL water, 1.0mL TGA solution, 1.0mL Na 2 TeO 3 solution, 37.83 mg NaBH 4 , 9.7mL hydrazine hydrate was added to the conical flask one by one, and after standing at room temperature for 3h, an aqueous solution of CdTe QDs was obtained. Wherein, the CdCl described in step (2) 2 , TGA, Na 2 TeO 3 , NaBH 4 and N 2 h 4 ·H 2 The molar ratio of O and five is 1:(2.0):(0.2):(50):(8000).

Embodiment 2

[0027] 1.1415g CdCl 2 2.5H 2 O is dissolved in 50mL water to obtain 0.1mol / L CdCl 2 solution; 0.139mL pure TGA was dissolved in 50mL water to obtain a 0.04mol / L TGA solution; 0.0445gNa 2 TeO 3 Dissolve in 50mL water to get 0.004mol / L Na 2 TeO 3 solution, set aside.

[0028] 0.2mL CdCl 2 solution, 20mL water, 1.25mL TGA solution, 2.0mL Na 2 TeO 3 solution, 75.66 mg NaBH 4, 36.375mL hydrazine hydrate was added to the conical flask one by one, and after standing at room temperature for 6h, an aqueous solution of CdTe QDs was obtained. Wherein, the CdCl described in step (2) 2 , TGA, Na 2 TeO 3 , NaBH 4 and N 2 h 4 ·H 2 The molar ratio of O and five is 1: (2.5): (0.4): (100): (30000).

Embodiment 3

[0030] 1.1415g CdCl 2 2.5H 2 O is dissolved in 50mL water to obtain 0.1mol / L CdCl 2 solution; 0.139mL pure TGA was dissolved in 50mL water to obtain a 0.04mol / L TGA solution; 0.0445gNa 2 TeO 3 Dissolve in 50mL water to get 0.004mol / L Na 2 TeO 3 solution, set aside.

[0031] 0.2mL CdCl 2 solution, 20mL water, 1.15mL TGA solution, 1.5mL Na 2 TeO 3 solution, 60mg NaBH 4 , 20mL of hydrazine hydrate was added to the conical flask one by one, and after standing at room temperature for 5h, an aqueous solution of CdTe QDs was obtained. Wherein, the CdCl described in step (2) 2 , TGA, Na 2 TeO 3 , NaBH 4 and N 2 h 4 ·H 2 The molar ratio of O and five is 1: (2.3): (0.3): (79.3): (16494.8).

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Abstract

The invention relates to a simple preparation method for synthesizing a CdTe quantum dot fluorescence probe at a normal temperature and an application of the CdTe quantum dot fluorescence probe, and belongs to the technical field of material preparation and medicine content detection. The method comprises the following steps: firstly, respectively preparing cadmium chloride (CdCl2), sodium tellurite (Na2TeO3) and thioglycollic acid (TGA) into aqueous solutions with certain concentrations; then, sequentially adding the CdCl2, water, the TGA, the Na2TeO3, sodium borohydride (NaBH4) and hydrazine hydrate (N2H4.H2O) into a conical flask one by one; and standing for certain time at the normal temperature so as to obtain a CdTeQDs aqueous solution which is used for optical detection of norfloxacin lactate. The TGA-modified CdTeQDs prepared by utilizing the method has the good optical property and has the ability of detecting the norfloxacin lactate content.

Description

technical field [0001] The invention relates to a simple preparation method and application of a CdTe quantum dot fluorescent probe, belonging to the technical field of material preparation and drug content detection. Background technique [0002] Norfloxacin lactate (norfloxacin lactate) is the third-generation quinolone antibacterial drug norfloxacin lactate (see chemical structure figure 1 ), broad-spectrum antibacterial, not easy to produce drug resistance, and has strong antibacterial activity against Gram-negative bacilli, especially bacteria of Enterobacteriaceae. Its water solubility is 1250 times that of norfloxacin, so it has better bactericidal activity, and has the advantages of easy absorption in animals and high bioavailability. It is mainly used for livestock and poultry colibacillosis, cholera, pullorum, and chronic respiratory infections. and other diseases. The determination method of norfloxacin lactate content mainly uses chromatography, but chromatogra...

Claims

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Application Information

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IPC IPC(8): C09K11/88G01N21/64
Inventor 卫潇李洪吉戴江栋周志平闫永胜
Owner JIANGSU UNIV
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