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Flashing and glow modulation type near-infrared chemiluminescence system taking nano-gold cluster as luminous body

A nano-gold cluster, chemiluminescence technology, applied in the field of analysis, to achieve the effect of high radiation intensity

Active Publication Date: 2022-04-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The development of chemiluminescence reactions using gold nanoclusters directly as luminous bodies is of great significance for promoting the development of chemiluminescence analysis, and there are no related reports so far

Method used

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  • Flashing and glow modulation type near-infrared chemiluminescence system taking nano-gold cluster as luminous body
  • Flashing and glow modulation type near-infrared chemiluminescence system taking nano-gold cluster as luminous body
  • Flashing and glow modulation type near-infrared chemiluminescence system taking nano-gold cluster as luminous body

Examples

Experimental program
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Effect test

Embodiment 1

[0060] 0.25mL H 4 AuCl 4 (96mM) solution and 0.4mM methionine solution were ultrasonically mixed evenly, and the mixed solution was adjusted to pH 7.0 with sodium hydroxide solution, incubated at 37 degrees Celsius for 48 hours, then the resulting solution was centrifuged to remove large particles at the bottom, and finally the resulting The solution was centrifuged and purified with ethanol at a low speed, and the resulting precipitate was nano-gold clusters, which were stored at low temperature for later use.

[0061] Prepare a 1mg / mL solution to detect the fluorescence spectrum, such as figure 1 shown. Depend on figure 1 It can be seen that there are two fluorescence processes in the synthesis of nano-gold clusters, which are located at 610nm and 810nm, which can be attributed to the band gap emission peak and defect fluorescence emission peak, respectively.

Embodiment 2

[0063] The steps are the same as in Example 1, the preparation concentration is 1mg / mL solution to detect the UV spectrum, and the obtained nano-gold clusters are prepared into a solution with a concentration of 1mg / mL to detect the UV spectrum, such as figure 2 shown. Depend on figure 2 It can be seen that the nano-gold cluster has two absorption peaks, located at 380 and 541 nm respectively.

Embodiment 3

[0065] The steps are the same as in Example 1, and a solution with a concentration of 0.5 mg / mL is prepared and dropped on a copper grid to observe the morphology, such as image 3 shown. Depend on image 3 Depend on image 3 It can be seen that the size of the gold nanoclusters is about 4 nm, and it is monodisperse spherical in water.

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Abstract

The invention belongs to the field of analysis technical methods, and relates to a flash and glow modulation type near-infrared chemiluminescence system taking a nanogold cluster as a luminous body. A methionine-coated water-soluble n-type nanogold cluster is used as a luminous substance of a chemiluminescence system, an oxidant is used as an excitation substance, holes are directly injected into the n-type nanogold cluster in a chemical oxidation manner, and chemiluminescence is directly generated by charge coupling between the exogenous holes and surplus electrons in a conduction band of the n-type nanogold cluster. Radiation of the chemiluminescence system is single-band near-infrared radiation, and modulation of flash type and glow type radiation can be realized based on a mode of selecting different oxidants as excitation substances.

Description

technical field [0001] The invention belongs to the field of analytical techniques and methods, and relates to the construction of a novel flash-type and glow-type radiation-adjustable near-infrared chemiluminescent system. Background technique [0002] Traditional chemiluminescence is mainly realized through molecular chemical reactions, and its luminescent substances are usually molecular luminescent substances, such as: luminol, isoluminol, acridinium esters, etc. The chemiluminescent radiation induced by molecular chemical reactions is mainly located in the visible region. Nanocrystals, including unitary nano-gold clusters, are usually used as catalysts for molecular chemiluminescent reaction systems: for example, patent CN104280542A uses nano-gold clusters to enhance chemiluminescent effects, realizes double-enhanced immunological methods for nanoparticle labeling amplification, prepares immunological kits and improves sensitivity of the CLIA method. Patent CN10376014...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/76
CPCG01N21/6428G01N21/76
Inventor 邹桂征傅莉
Owner SHANDONG UNIV
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