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Three-dimensional ionic yttrium (III) coordination polymer as well as preparation method and application thereof

A coordination polymer and ionic technology, applied in the field of chemistry, can solve the problems of unstable existence of probes and application limitations, and achieve good fluorescence performance, low synthesis cost and simple preparation method

Active Publication Date: 2022-04-22
长治学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some probes cannot exist stably in aqueous solution, so their application is greatly limited, so the design and synthesis of Cu in aqueous solution 2+ Fluorescent probes with selective recognition of ions have important research significance

Method used

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  • Three-dimensional ionic yttrium (III) coordination polymer as well as preparation method and application thereof
  • Three-dimensional ionic yttrium (III) coordination polymer as well as preparation method and application thereof
  • Three-dimensional ionic yttrium (III) coordination polymer as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: the preparation of yttrium (III) coordination polymer

[0034] Weigh 0.1mmol H 2 BITA and 0.2mmol Y(NO 3 ) 3 ·6H 2 O was added to a 15mL polytetrafluoroethylene tube, and 600μL of 0.2mol / L KOH solution was added dropwise. The polytetrafluoroethylene tube was sealed in a stainless steel reaction kettle, reacted at 433K for 72 hours, and naturally cooled to room temperature, yellow blocky crystals were precipitated, washed with water and acetone, and vacuum-dried, with a yield of 89%. Elemental analysis: theoretical value: C 36.23, H 1.95, N 15.09%; experimental value: C 36.03, H 1.91, N 15.13.

[0035] Crystal Structure Determination of Yttrium(III) Coordination Polymer:

[0036] The determination of the crystal structure adopts single crystal X-ray diffraction, and the Bruker D8-Quest detector passes through the monochromatic Mo-Kα ray through the graphite monochromator, the temperature is 296K, and the scanning mode is ω-2θ, and the data is collected...

Embodiment 2

[0042] Example 2: The yttrium (III) coordination polymer of the present invention has photoluminescent properties at room temperature

[0043] The 2,5-bis-imidazole benzenedicarboxylic acid ligand exhibits a large conjugated structure with multiple coordination sites, and the carboxyl group can coordinate with metal ions to form di- or multi-nuclear metal cluster structural units. At room temperature, we carried out solid-state fluorescence tests on 2,5-bis-imidazolene dicarboxylic acid ligand and yttrium(III) coordination polymer powder respectively ( Figure 6 ). Under the condition that the excitation wavelength is 360nm and the slit is 5nm, the H 2 The BITA ligand has a fluorescence emission peak at 430nm due to the H 2 Generated by the π-π* and n-π* electronic transitions contained in the BITA conjugated system. However, when the yttrium (III) coordination polymer is excited by the 460nm excitation wave, the fluorescence emission peak appears at 535nm, compared with th...

Embodiment 3

[0044] Embodiment 3: Different solvents of the present invention induce the fluorescence properties of yttrium (III) coordination polymers

[0045] Since the solvent will cause the change of the fluorescence properties of the compound, weigh 5 mg of yttrium (III) coordination polymer powder samples at room temperature, place them in 10 mL of different solvents: distilled water, DMF, ethanol, acetonitrile, and process them by ultrasonic treatment. After 60 minutes, the suspension was left to settle for three days, and the supernatants of different solvents were taken for fluorescence tests, such as Figure 7 As shown, the yttrium (III) coordination polymer exhibits obvious differences in fluorescence in different solvents, and the fluorescence intensity in the water system is the strongest.

[0046] In order to determine the stability of the yttrium (III) coordination polymer in the above solvents, after soaking at room temperature for 2 weeks, X-ray powder diffraction analysis...

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Abstract

The invention discloses a three-dimensional ionic yttrium (III) coordination polymer, a preparation method and application, the molecular formula of the coordination polymer is [Y (C14H7N4O4). (H2O)] n.nNO3, the chemical structural formula is shown in the specification, n is a positive integer; y < 3 + > ions represented by Y1 are respectively coordinated with carboxyl oxygen atoms O1, O1iv, O2ii and O2iii from four 2, 5-biimidazole benzene dicarboxylic acid ligands and coordinated water molecules to form bonds, and are also respectively coordinated with imidazole nitrogen atoms N2v and N2vi from two 2, 5-biimidazole benzene dicarboxylic acid ligands to form bonds; the coordination number of the Y < 3 + > ion is 7, and the Y < 3 + > ion presents a pentagonal bipyramid space geometric configuration; and nitrate radicals are counter ions. The coordination polymer disclosed by the invention has strong fluorescence property and stable structure in an aqueous solution, and can be used as a fluorescent probe for detecting Cu < 2 + > ions in the aqueous solution.

Description

technical field [0001] The invention belongs to the field of chemistry and relates to a coordination polymer, in particular to a three-dimensional ionic yttrium (III) coordination polymer, a preparation method and an application. Background technique [0002] Too much or too little heavy metal ions will have a greater impact on organisms, and even cause diseases. while the heavy metal Cu 2+ Ions play a particularly important role in many physiological processes in organisms, and are also an important environmental pollutant. In biology and medicine, the transition metal Cu 2+ Dysregulation of ion homeostasis contributes to neurodegenerative diseases such as Alzheimer's, Parkinson's, prion and Wilson's diseases. Therefore, to understand the transition metal Cu 2+ The effects of ions on organisms and the environment require a reliable, general quantification method. [0003] Current detection of Cu 2+ Ion methods include ion mobility spectrometry (IMS), X-ray dispersion,...

Claims

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Application Information

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IPC IPC(8): C08G83/00G01N21/64
CPCC08G83/008G01N21/64
Inventor 苏峰张宝秀李少东王志军
Owner 长治学院
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