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Host-guest assembled supramolecular gel based on functionalization of trimesoyl chloride and its preparation method and use
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A technology of trimesoyl chloride and supramolecular gel, applied in the field of ion detection
Inactive Publication Date: 2019-02-01
NORTHWEST NORMAL UNIVERSITY
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However, in real life, various ions that are beneficial or harmful to the human body mostly exist in the water phase, and most of the reported organic compounds that can detect ions are hydrophobic, and it is difficult to detect ions in the water phase.
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Embodiment 1
[0040] Embodiment 1, the synthesis of supramolecular gel TG
[0041] (1) Synthesis of the main compound TNA: Add 1 mmol (0.2639 g) of trimesoyl chloride and 3.5 mmol (0.7422 g) of 1,8-naphthalimide hydrazine in 30 mL of DMF, and react at room temperature for about 12 hours; After the completion, add hydrochloric acid, cool, white flocs are precipitated, filter with suction, and recrystallize with DMF and ethanol to obtain the product TNA. The yield was 68.3%.
[0042] (2) Synthesis of guest compound G: In 25mL DMF, add 1mmol (0.2639g) trimesoyl chloride and 3.3mmol (0.3101g) 4-aminopyridine (molar ratio 1:3.3), and react at room temperature for about 12h , recrystallized from DMF and water to give 0.96 mmol (0.4211 g) of 4-aminopyridine functionalized trimesoyl chloride (G). The yield is 80%.
[0043] (3) Synthesis of supramolecular gel TG: Take 24mmol (0.0193g) of the main compound TNA and 24mmol (0.0107g) of the guest G, add 300μl of DMSO, heat until completely dissolved,...
Embodiment 2
[0044] Embodiment 2, fluorescence recognition Fe 3+
[0045] Pipette 1ml (0.2mM) supramolecular gel TG into a series of cuvettes, add 2 times the equivalent of Mg 2+ , Ca 2+ , Cr 3+ , Fe 3+ ,Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ , Ag + , Cd 2+ , Hg 2+ , Pb 2+ , Ba 2+ , Al 3+ , La 3+ , Tb 3+ and Eu 3+ (0.1M) solution, if the fluorescence of TG is quenched, it means that Fe was added 3+ ; If the fluorescence of TG does not change, it means that the addition of Fe is not 3+ .
Embodiment 3
[0046] Example 3, TG continuous fluorescence recognition of H 2 PO 4 -
[0047] Pipette 1ml (0.2mM) supramolecular gel TG into a series of cuvettes, add 2ml Fe respectively 3+ aqueous solution, the metal gel TG-Fe will be obtained. Move the obtained metal gel TG-Fe evenly to a series of cuvettes, add Cl respectively - , Br - , I - , F - , AcO - , H 2 PO 4 - , HSO 4 - , SCN - , CN - and ClO 4 - Aqueous solution (2×10 -5 mol / L), if the fluorescence of the metal gel TG-Fe recovers, it means that the addition of H 2 PO 4 - , if the fluorescence of the metal gel TG-Fe does not recover, it means that the addition of H 2 PO 4 - .
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Abstract
The invention designs and synthesizes host-guest assembled supramolecular gel based on the functionalization of trimesoyl chloride. N-amino-1, 8-naphthalic anhydride functionalized trimesoyl chlorideas a main body and 4-amino pyridine-functionalized trimesoyl chloride as a guest are complex and assembled into the gel in a H2O-DMSO system. The supramolecular gel has good fluorescence emission properties and emits yellow-green fluorescence when the excitation wavelength is 380nm. A series of aqueous cationic solutions are added to the supramolecular gel, and only Fe<3+> can quench the fluorescence of the supramolecular gel. In the metal gel TG-Fe formed by coordination of the supramolecular gel and Fe<3+>, a series of anions are added respectively. Only H2PO4<-> can restore the fluorescenceof the metal gel TG-Fe. This competitive coordination recognition property has an important application value in the field of ion identification.
Description
technical field [0001] The present invention relates to an organic supramolecular gel based on host-guest assembly, in particular to a host-guest assembly supramolecular gel based on trimesoyl chloride functionalization; the present invention also relates to the supramolecular gel fluorescent recognition iron The application of ions and dihydrogen phosphate ions belongs to the field of ion detection. Background technique [0002] Iron is an indispensable trace element for the human body. It is an important component of hemoglobin, myoglobin and various enzymes. If iron is lacking in the body, it will affect the synthesis of hemoglobin and myoglobin, and make certain enzymes, such as cells The activities of pigment C, ribonucleotidereductase, succinate dehydrogenase, etc. are reduced. These enzymes are closely related to biological oxidation, tissue respiration, and the decomposition and synthesis of neurotransmitters. Therefore, the lack of iron can cause many physiologic...
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