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A kind of organic-inorganic hybrid fluorescent sensing material and its synthesis method and application

A technology of fluorescence sensing and synthesis method, which is applied in the field of organic-inorganic hybrid fluorescence sensor and its preparation, can solve the problems of complexity, high analysis cost, and difficulty in real-time detection, and achieve high selectivity detection, high fluorescence quantum Yield, easy synthesis effect

Active Publication Date: 2017-09-19
CHIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These testing methods have a common disadvantage in that they require complex and diverse sample preparation and sophisticated experimental instruments, resulting in high analysis costs, and it is difficult to achieve real-time detection

Method used

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  • A kind of organic-inorganic hybrid fluorescent sensing material and its synthesis method and application
  • A kind of organic-inorganic hybrid fluorescent sensing material and its synthesis method and application
  • A kind of organic-inorganic hybrid fluorescent sensing material and its synthesis method and application

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Embodiment 1

[0026] Embodiment 1: Synthesis of organic-inorganic hybrid fluorescent sensing material P1

[0027] Weigh 1.225 g (1.4 mmol) heptaisobutyl-propylamino polysilsesquioxane (C 31 h 71 NO 12 Si 8 ), 0.224 g (1.4 mmol) 8-formylquinoline (KL), 10 mL dichloromethane (CH 2 Cl 2 ) into a 50 mL round bottom flask at one time, stirred at room temperature, and the reaction lasted for 12 h. When the solvent dichloromethane was added, the solids of the reactants were all dissolved and turned into a light yellow solution. After 12 h, the color of the solution changed significantly to yellow. The mixture obtained by the reaction was evaporated with a rotary evaporator to remove the solvent to obtain a yellow solid mixture, which was then washed and filtered with 50 mL of methanol, and washed and filtered 5 times repeatedly, and the yield after drying was 67%. Abbreviated as P1.

[0028] The structural formula is as follows:

[0029]

[0030] IR (KBr, cm -1 ): 2965, 2865, 1634, 15...

Embodiment 2

[0031] Embodiment 2: to Fe under solution state (homogeneous phase) 3+ Ion detection

[0032] The THF solution concentration of P1 is 2.5×10 -6 M, using Fe 3+ Ions (0-5.0×10 -4M) Titration, causing the ultraviolet absorption at a wavelength of 286nm to be enhanced, and has a nonlinear correlation, and the correlation coefficient R is 0.992.

[0033] THF solution concentration 2.5 x 10 -6 M, adding Fe 3+ Can lead to fluorescence quenching, the emission at 438nm shows a nonlinear weakening, for Fe 3+ The detection range is 0-2.1×10 -3 M, detection limit 1.6×10 -6 M. Add 5 equivalents of eleven different metal ions: Zn 2+ 、 Cu 2+ , Ca 2+ 、 Al 3+ 、Ni 2+ 、Cr 3+ , Mn 2+ , Pb 2+ 、 Ba 2+ 、Na + , Fe 2+ , and found that they interfere less with iron ions.

[0034] Selective experiments for the sensor to detect iron ions, figure 1 is Fe 3+ Ion titration of the THF solution of P1, the concentration of P1 is 2.5×10 -6 M mol / L, when Fe 3+ The ion concentratio...

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Abstract

The invention discloses an organic-inorganic hybrid fluorescent sensing material and a synthesis method thereof, comprising the following steps: dissolving heptaisobutyl-propylamino polysilsesquioxane and 8-formyl quinoline in dichloromethane at room temperature Stirring and reacting under low pressure, the solid mixture is obtained by solvent evaporation method, and then the target fluorescent sensing material can be obtained after repeated washing and filtering with methanol; the invention also discloses the application of an organic-inorganic hybrid fluorescent sensing material. Hybrid fluorescent sensing materials can be applied to the detection of iron ions. The fluorescent sensing material prepared by the present invention is simple to synthesize, and its structure is confirmed by NMR, infrared and mass spectrometry, has a high fluorescence quantum yield, and can detect iron ions with high sensitivity and high selectivity in a homogeneous system .

Description

technical field [0001] The invention relates to an organic-inorganic hybrid fluorescent sensor and a preparation method thereof, in particular to an organic-inorganic fluorescent sensor containing POSS and quinoline and a preparation method thereof, belonging to the field of single-photon fluorescent sensors. Background technique [0002] Iron is an extremely abundant transition metal element in biological systems and an essential element in biological systems, playing a very important role in the metabolism of organisms. In organisms, ferric iron has the function of transporting heme, and at the same time it is a cofactor for many enzyme reactions. The lack of iron in organisms will cause anemia, liver and kidney damage, diabetes and neonatal failure and other diseases. The detection methods of iron ions generally include atomic absorption spectroscopy, plasma emission spectroscopy, electrochemical methods, colorimetry, gas chromatography, biological and nano sensor means. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/21C09K11/06G01N21/64
Inventor 汪新严永新桂美芳开玉倩
Owner CHIZHOU UNIV