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Two-sided Schiff base sensor, synthesis method thereof, and application thereof in fluorescent colorimetric continuous identification of Cu<2+> and H<2>PO<4><->

A H2PO4-, Schiff base technology, applied in fluorescence/phosphorescence, analysis by chemical reaction of materials, material analysis by observing the impact on chemical indicators, etc., can solve the problem of expensive sensors, long response time, complex Operation, etc.

Inactive Publication Date: 2015-09-16
NORTHWEST NORMAL UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0004] So far, there have been a large number of methods that can be used to detect Cu 2+ and H 2 PO 4 - Chemical and physical sensors have been reported, but most of these sensors require expensive equipment, complex operations and long response time, which greatly limits the application and development of these sensors.

Method used

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  • Two-sided Schiff base sensor, synthesis method thereof, and application thereof in fluorescent colorimetric continuous identification of Cu&lt;2+&gt; and H&lt;2&gt;PO&lt;4&gt;&lt;-&gt;
  • Two-sided Schiff base sensor, synthesis method thereof, and application thereof in fluorescent colorimetric continuous identification of Cu&lt;2+&gt; and H&lt;2&gt;PO&lt;4&gt;&lt;-&gt;
  • Two-sided Schiff base sensor, synthesis method thereof, and application thereof in fluorescent colorimetric continuous identification of Cu&lt;2+&gt; and H&lt;2&gt;PO&lt;4&gt;&lt;-&gt;

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Embodiment Construction

[0038] Below by specific embodiment sensor molecule of the present invention M and synthesis as well as continuous detection of Cu in 2+ and H 2 PO 4 - application is further explained.

[0039] 1. Sensor molecules M Synthesis of DMF: Add 0.49g of 3,3′-dimethoxybenzidine, 0.78g of 2-hydroxy-1-naphthaldehyde, 10mL of glacial acetic acid and 30mL of DMF into a round bottom flask, stir and dissolve, and react at 85°C for 8 hours . After the reaction, cool down to room temperature, and a red precipitate precipitates out after a while, filter it with suction and wash it three times with hot absolute ethanol, and finally recrystallize it with DMF to obtain a red powdery sensor compound M (0.51 g, 85% yield). Its structure and synthetic formula are as follows:

[0040]

[0041] compound M structure through the following IR,1 H NMR, and single crystal X-ray diffraction data prove:

[0042] m.p. >300℃. IR: (KBr, cm -1 ) n: 3435 (OH), 3064 (Ar-H), 2928 (CH 3 ), 2830 (CH ...

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Abstract

The invention discloses a two-sided Schiff base sensor molecule based on dianisidine and 2-hydroxy-1-naphthaldehyde. The two-sided Schiff base sensor molecule has a fluorophore naphthalene ring structure, the naphthalene ring has -OH, the Schiff base has a -C=N- structure, and metal ions Cu<2+> can easily coordinate with N and O atoms to form a complex, so the two-sided Schiff base sensor molecule can identify Cu<2+>. H<2>PO<4><-> is added to a complex formed by the sensor molecule M and Cu<2+> to make Cu<2+> and H<2>PO<4><-> form a more stable complex, so Cu<2+> is substituted in am acceptor, thereby Cu<2+> and H<2>PO<4><-> can be continuously identified. The sensor molecule can conveniently, rapidly and efficiently detect Cu<2+> and H<2>PO<4><-> in an aqueous system, and the sensor molecule can be switched into different fluorescence emission states comprising opening (strong fluorescence emission) or closure (fluorescence quenching), so the sensor molecule can also be applied in the field of molecule switches.

Description

technical field [0001] The present invention relates to a kind of bilateral Schiff base sensor molecule, especially a kind of Schiff base sensor molecule based on dianisidine and 2-hydroxyl-1-naphthaldehyde; The present invention also relates to the synthesis of this Schiff base sensor molecule simultaneously and continuous identification of Cu in fluorescence colorimetry 2+ and H 2 PO 4 - The specific application of the invention belongs to the field of chemical synthesis and the technical field of ion detection. Background technique [0002] Copper is an essential trace element for the human body. Copper is widely distributed in biological tissues, most of which exist in organic complexes, many of which are metalloproteins that function in the form of enzymes. Each copper-containing protein enzyme has its clear physiological and biochemical role. Many electron transfer and redox reactions involving oxygen in biological systems are catalyzed by copper-containing enzymes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/78
Inventor 魏太保王芹芹吴贵渊王晓婷张有明
Owner NORTHWEST NORMAL UNIVERSITY
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