A kind of luminescent carbon quantum dot and its preparation method and application

Abstract

The invention belongs to the technical field of molecular probes, in particular to a luminescent carbon quantum dot, a preparation method and application thereof, and a method for detecting arginine in an aqueous solution by using the luminescent carbon quantum dot, in particular to a method for synthesizing the carbon quantum dot by using 2-methoxy-4-methylphenol and o-phenylenediamine as raw materials by a hydrothermal synthesis method and detecting arginine by fluorescence. The synthesis cost of the carbon quantum dot is low, the method is simple, the synthesized carbon quantum dot does notcontain heavy metals, and has low toxicity, and the carbon quantum dot provided by the invention is completely water-soluble, and can detect arginine in water, the detection limit is 78.11 mu M, thefluorescence quantum yield in water is 6.3%, and the luminescent carbon quantum dot has very good light stability, anti-interference and relatively good application prospects.

Description

technical field [0001] The invention belongs to the technical field of molecular probes, and in particular relates to a luminescent carbon quantum dot, a preparation method and application thereof, and a method for detecting arginine in an aqueous solution by using the luminescent carbon quantum dot. Background technique [0002] Among the 20 kinds of amino acids that make up proteins, arginine is one of the amino acids that can form the most diverse proteins in animals. It is not only the precursor of protein synthesis, but also produces nitric oxide, urea, polyamines, proline, gluten It is the precursor of amino acid, creatine and agmatine, etc. In addition, arginine plays a vital role in blood vessel dilation, nerve transmission, cell division, wound healing, immune function and hormone release, so it is recognized by scientists However, the strong hydrophilicity of arginine and the weak interaction with receptors make its detection in aqueous solution a great challenge. ...

AI Technical Summary

Problems solved by technology

[0002] Among the 20 kinds of amino acids that make up proteins, arginine is one of the amino acids that can form the most diverse proteins in animals. It is not only the precursor of protein synthesis, but also produces nitric oxide, urea, polyamines, proline, gluten It is the precursor of amino acid, creatine and agmatine, etc. In addition, arginine plays a vital role in blood vessel dilation, nerve transmission, cell division, wound healing, immune function and hormone release, so it is recognized by scientists However, the strong hydrophilicity of arginine and the weak interaction with receptors make its detection in aqueous solution a great challenge. At present, only a few studies have reported the use of chemical sensors to detect arginine for detection [Parveen, S.D.S., Affrose, A., Pitchumani, K., 2015. Sens. Actuators B 221, 521–527. He, L.; So, V. L. L.; Xin J. H.; 2014. Sens. Actuators B 192, 496 –502.], but the complex synthesis process greatly limits the practical application of these sensors; the patent of this invention adopts a simple hydrothermal synthesis method to prepare a water-soluble luminescent carbon quantum dot, the synthesis method is simple, and the carbon quantum dot completely water soluble

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