AuNC (gold nanocluster) and CD (carbon quantum dot) composite fluorescent probe and application thereof

A technology of carbon quantum dots and gold nanoclusters is applied in the application field of detection, which can solve the problem that carbon quantum dots do not have quantum confinement effect, etc., and achieve the effects of no toxic side effects, good selectivity, high sensitivity and selectivity
CN106908427AInactive Publication Date: 2017-06-30HARBIN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HARBIN NORMAL UNIVERSITY
Publication Date
2017-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an AuNC (gold nanocluster) and CD (carbon quantum dot) composite fluorescent probe. The AuNC and CD composite fluorescent probe comprises BSA (bovine serum albumin) functionalized AuNCs (BSA-AuNCs) and fluorescent CDs in the mole ratio being 1:(1-5), wherein the BSA-AuNCs are prepared from a chloroauric acid solution, a BSA 4 solution and an NaOH solution through a reaction, and the fluorescent CDs are prepared from citric acid, diethylenetriamine and acetone through a reaction; the BSA-AuNCs and the CDs constituting the multifunctional composite fluorescent probe have specific recognition response to Hg<2+> and Cr<6+> respectively, when the BSA-AuNCs and the CDs constitute the multifunctional composite fluorescent probe, fluorescence emission of the BSA-AuNCs and fluorescence emission of the CDs are not affected mutually, respective probe detection results are undisturbed, the probe has higher sensitivity and selectivity, and respective detection of different kinds of ions and distinctive effects when two kinds of ions exist simultaneously are realized.
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Description

technical field

[0001] The invention belongs to the technical field of nanometer detection of ions, in particular to gold nanoclusters and carbon quantum dot composite fluorescent probes and their ability to detect heavy metal ions Hg 2+ and Cr 6+ detection applications. Background technique

[0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. Among heavy metal ions, mercury is a highly toxic but ubiquitous pollutant in nature. Mercury pollution can cause serious damage to the brain, nervous system, endocrine system, and kidneys. Water-soluble mercury ions (Hg 2+ ) is one of the most common and stable forms of mercury ion pollutants, which is the main way of water environment and soil pollution. It is mainly caused by human factors such as mining, exhaust gas discharge, sewage irrigation and use of heavy metal products. Inorganic mercury ions can be converted to methylmercury by bacteria in the environment, and thi...

Claims

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