A kind of yellow light emitting fluorescent material and its application as pH probe

A fluorescent material, yellow light technology, applied in luminescent materials, material analysis using radiation, material analysis using radiation diffraction, etc., can solve the problems of poor optical stability, small detection range, high toxicity, etc.

Active Publication Date: 2021-11-23
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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  • A kind of yellow light emitting fluorescent material and its application as pH probe
  • A kind of yellow light emitting fluorescent material and its application as pH probe
  • A kind of yellow light emitting fluorescent material and its application as pH probe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 0.52 mmol of gadolinium nitrate, 0.2 mmol of yttrium nitrate, 0.2 mmol of cerium nitrate, 0.08 mmol of manganese nitrate, 1 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.

[0025] 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: NaY 0.2 Gd 0.8 f 4 Exhibits a strong Mn ...

Embodiment 2

[0027] Add 0.66 mmol of gadolinium nitrate, 0.2 mmol of yttrium nitrate, 0.1 mmol of cerium nitrate, 0.04 mmol of manganese nitrate, 1 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 luminescent materials, and relates to a yellow light-emitting fluorescent material and its application as a pH probe. A yellow light emitting fluorescent material, the molecular formula of the matrix material of the fluorescent material is Ce / Mn:NaY 0.2 Gd 0.8 f 4 , the fluorescent pH probe material under the excitation wavelength of 254nm ultraviolet light, Mn 2+ It presents a broadband emission with a central emission wavelength of 550nm, showing strong yellow emission; as the pH increases from 3 to 10, Mn 2+ The luminescence intensity of ions decreases linearly. The invention realizes the fluorescent pH detection method through the protonation or deprotonation process of the pH-responsive surface ligand and energy transfer regulation, in order to obtain a highly sensitive inorganic fluorescent pH probe with high photochemical stability, low toxicity and fast response The material provides a new idea and is expected to be widely used in the field of pH detection.

Description

technical field [0001] The invention belongs to the field of inorganic luminescent materials, and relates to a yellow light-emitting fluorescent material and its application as a pH probe. Background technique [0002] The common pH detection methods mainly include pH test paper and electrochemical pH meter. The pH test paper is only suitable for rough measurement. The electrochemical pH meter is large in size and complex in design. It can only be used for single-point detection, and cannot be applied to small devices and cell environments. 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 stabili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85G01N21/64G01N23/04G01N23/20
CPCC09K11/7773G01N21/6428G01N23/04G01N23/20058G01N2021/6439
Inventor 雷磊徐时清夏涵
Owner CHINA JILIANG UNIV
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