Ratio type yellow light to blue light emission fluorescent material and application thereof as ratio type fluorescent pH probe

A fluorescent material, ratio-based technology, applied in luminescent materials, fluorescence/phosphorescence, material analysis by optical means, etc., can solve the problems of poor optical stability, high toxicity, small detection range, etc., to achieve low cost, uniform shape, Good dispersion effect

Active Publication Date: 2019-08-23
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Current fluorescent pH probe materials mainly include organic fluorescent dyes, quantum dots and metal-organic framework materials, which have the following disadvantages: poor optical stability, small detection range and high toxicity.

Method used

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  • Ratio type yellow light to blue light emission fluorescent material and application thereof as ratio type fluorescent pH probe
  • Ratio type yellow light to blue light emission fluorescent material and application thereof as ratio type fluorescent pH probe
  • Ratio type yellow light to blue light emission fluorescent material and application thereof as ratio type fluorescent pH probe

Examples

Experimental program
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Embodiment 1

[0023] Add 0.52 mmol of gadolinium nitrate, 0.2 mmol of scandium nitrate, 0.2 mmol of cerium nitrate, 0.08 mmol of manganese nitrate, 4 mmol of sodium chloride and 4 mmol of trisodium citrate into 10 ml of water and stir for 15 minutes Then add 20 milliliters of ethylene glycol in above-mentioned solution, stir 20 minutes; Add 4 millimoles of ammonium fluoride and stir 30 minutes again; o C for 5 hours; after cooling, centrifuge washing with deionized water and absolute ethanol, and dry in a vacuum freeze-drying oven for 1 hour to obtain the final product.

[0024] Powder X-ray diffraction analysis results show that the product is pure hexagonal NaGdF 4 Mutually( figure 1 ). Transmission electron microscope observation showed that its morphology was homogeneous monodisperse cluster nanoparticles ( figure 2 ), the particle size of a single cluster is about 90nm. Under the excitation of xenon lamp with a wavelength of 254nm, Ce / Mn: NaSc 0.2 Gd 0.8 f 4 Exhibits a strong M...

Embodiment 2

[0026]Add 0.66 mmol of gadolinium nitrate, 0.2 mmol of scandium nitrate, 0.1 mmol of cerium nitrate, 0.04 mmol of manganese nitrate, 4 mmol of sodium chloride and 4 mmol of trisodium citrate into 10 ml of water and stir for 15 minutes Then add 20 milliliters of ethylene glycol in above-mentioned solution, stir 20 minutes; Add 4 millimoles of ammonium fluoride and stir 30 minutes again; o C for 5 hours; after cooling, centrifuge washing with deionized water and absolute ethanol, and dry in a vacuum freeze-drying oven for 1 hour to obtain the final product. The structure and fluorescence properties of this product are similar to those of Example 1.

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Abstract

The invention belongs to the field of inorganic light emission materials and in particular relates to a ratio type yellow light to blue light emission fluorescent material and application thereof as aratio type fluorescent pH probe. According to the ratio type yellow light to blue light emission fluorescent material, the molecular formula of a substrate material of the fluorescent material is Ce / Mn:NaSc0.2Gd0.8F4; under a condition of an ultraviolet excitation wavelength of 254 nm, Ce<3+> is in broadband transmission, a light emission wavelength range is 300-480 nm, Mn<2+> has a central emission wavelength of 550 nm, and the fluorescent material has intensive yellow light emission as a whole; and along with increase of the pH value from 4 to 10, the fluorescent intensity ratio of Mn<2+> ions to Ce<3+> ions is gradually reduced, and the light emission color is changed into blue from yellow. By adopting the material, a method of ratio type fluorescent pH value detection is achieved through a pH responded surface ligand protonation or deprotonation process and energy transfer regulation, new ideas are provided for obtaining a high-senstivity inorganic fluorescent pH value probe material with high light chemical stability, low toxicity and rapid response, and the material has the potential of being widely used in the field of pH value detection.

Description

technical field [0001] The invention belongs to the field of inorganic luminescent materials, in particular to a ratio-type yellow light-to-blue light-emitting fluorescent material and its application as a ratio-type fluorescent pH probe. Background technique [0002] Common pH detection methods mainly include pH test paper and electrochemical pH meter. The pH test paper is only suitable for rough measurement, while the electrochemical pH meter is large in size and complex in design and can only be used for single-point detection. Fluorescence-based pH detection methods have fast response, high spatial resolution, and long-distance measurement. The development of fluorescent pH probe materials has important scientific research value and practical significance. The current fluorescent pH probe materials mainly include organic fluorescent dyes, quantum dots and metal-organic framework materials, which have the following disadvantages: poor optical stability, small detection ra...

Claims

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Application Information

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IPC IPC(8): C09K11/85B82Y20/00B82Y30/00B82Y40/00G01N21/64
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/7773G01N21/643G01N21/6447G01N2021/6432G01N2021/6439
Inventor雷磊徐时清夏涵
OwnerCHINA JILIANG UNIV