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Method for synthesizing cadmium selenide quantum dots based on amino acid and polypeptide

A technology of cadmium selenide and quantum dots, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as harsh reaction conditions, and achieve the effects of stable synthesis process, good uniformity and low synthesis cost

Inactive Publication Date: 2008-01-16
WUHAN UNIV
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Problems solved by technology

[0005] In the above-mentioned various methods, although the inorganic synthesis route has less pollution, there are problems such as product uniformity and particle size to a certain extent; while using the metal compound-element organic compound synthesis route, although CdO, Cd(Ac ) 2 High-quality bare quantum dots are prepared from inorganic compounds such as Cd(CH 3 ) 2 , Zn(CH 3 ) 2 and other organometallic compounds as raw materials, and all require harsh reaction conditions

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  • Method for synthesizing cadmium selenide quantum dots based on amino acid and polypeptide
  • Method for synthesizing cadmium selenide quantum dots based on amino acid and polypeptide

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Embodiment 1

[0025] Below in conjunction with specific embodiment. To further describe the present invention, it should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0026] 1. Preparation of biomolecules containing selenol groups:

[0027] The standard substance of selenocystine (purchased from Sigma Company) was made into a solution with a concentration of 0.5 mmol / L with a 20 mmol / L phosphate buffer solution of pH=8.0, and the final concentration was the same under nitrogen protection. 0.8 mmol / L dithiothreitol (purchased from Wuhan Shenshi Chemical Industry Co., Ltd.) was reacted at 50° C. for 2 hours to obtain selenol group-containing selenocysteine.

[0028] 2. Preparation of cadmium-glutathione complex:

[0029] Also under nitrogen protection, use glutathione (purchased from Beijing Huamei Biochemical Reagent Co., Ltd.) to stabilize the final concentration of 2 mm...

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Abstract

The invention discloses a method of synthesizing CdSe quantum dots with Amino acid and polypeptide, comprising the following steps: A, preparing cell-free system of selenium-containing amino acid; B, preparing Cd-glutathione; C, synthesizing CdSe quantum dots. The invention is provided with a simple technology and mild reaction conditions. As no organometallic compounds are included in the preparation, the protection from the inert gas is not needed. The production is safe and low in cost, helpful to the industrial synthesis of the nano-particles (including quantum dots).

Description

technical field [0001] The invention belongs to the fields of nanoscience, microbiology and material synthesis, in particular, the invention relates to a method for synthesizing cadmium selenide (CdSe) quantum dots based on amino acids and polypeptides. Background technique [0002] Quantum dots (Quantum Dots, QDs) have unique fluorescent nano-effects, such as wide excitation spectrum and continuous distribution, narrow and symmetrical emission spectrum, and the emission wavelength can be adjusted by changing the particle size and composition, strong fluorescence intensity, and fast bleaching rate. Slow, sensitive, and much attention. It has broad application prospects in luminescent materials, photocatalysis, photosensitive sensors, and fluorescent probe labeling. Among them, quantum dots composed of group IIB and VIA elements, referred to as type II-VI quantum dots (such as CdSe, CdTe, etc.), are expected to become a new type of quantum dots due to their special and excel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/54
Inventor 刘茴茴崔然谢志雄庞代文
Owner WUHAN UNIV
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