Asymmetric bi-square acid cyanine chemical sensor for Fe3+ and Ag+ recognition and preparation method thereof
A chemical sensor, asymmetric technology, used in chemical instruments and methods, squaraine dyes, scientific instruments, etc., to achieve the effects of good selectivity, good anti-interference, and high sensitivity
Inactive Publication Date: 2018-09-18
CHANGZHOU UNIV
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Problems solved by technology
[0005] The technical problem to be solved in the present invention is: in order to solve existing 3+ and Ag + Deficiency of identified chemical sensors provides a method for Fe 3+ Recognized asymmetric bisacid cyanine chemical sensor and preparation method thereof
Method used
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Embodiment 1
[0028] Weigh 7.97g (about 0.05mol) of 2,3,3-trimethyl-3H-indole, 5.40g (about 0.025mol) of 1,4-dibromobutane and 50ml of toluene into a three-necked flask. Heating to reflux and stirring with a constant temperature heating magnetic stirrer, and feeding nitrogen protection, and the reaction continued for 36 hours. After cooling to room temperature, a small amount of solid precipitated out. After the solvent was evaporated by rotary evaporation, 40 ml of ether was added to wash out the solid, filtered and washed three times with ethyl acetate, and then dried to obtain a purple solid. Without further purification, the next reaction was carried out directly.
[0029] (2) Synthesis of squaryl chloride
[0030] Weigh 3.4 g (about 0.0300 mol) of squarylium, add 16 mL of carbon tetrachloride and 80 μL of N,N-dimethylformamide into a three-necked flask, and cool to below 10°C with an ice-water bath. Measure 10.2 g of oxalyl chloride and add it to the flask, and bubbles will be gener...
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The invention relates to an asymmetric bi-square acid cyanine chemical sensor for Fe3+ and Ag+ recognition and a preparation method thereof. The preparation method of the asymmetric bi-square acid cyanine chemical sensor includes the following steps: synthesizing N-butyl disubstituted-2,3,3-trimethyl-3H-indole quaternary ammonium salt from 2,3,3-trimethyl-3H-indole and 1,4-dibromobutane, synthesizing square acyl chloride from square acid and oxalyl chloride, synthesizing N,N-dipropylaniline square acid hemicyanine from the square acyl chloride and N,N-dipropylaniline, and synthesizing the asymmetric bi-square acid cyanine from the N-butyl disubstituted-2,3,3-trimethyl-3H-indole quaternary ammonium salt and the N,N-dipropylaniline square acid hemicyanine. The beneficial effects of the preparation method are as follows: (1) the prepared asymmetric bi-square acid cyanine chemical sensor has excellent optical properties, and has advantages of high sensitivity and good selectivity; (2) in the process of detecting and identifying iron ions and silver ions, the color of the solution also changes, which is beneficial to colorimetric detection; and (3) the asymmetric bi-square acid cyaninechemical sensor has good anti-interference ability for the recognition of the iron ions and the silver ions.
Description
technical field [0001] The present invention specifically relates to a kind of for Fe 3+ and Ag + The identified asymmetric double acid cyanine chemical sensor and its preparation method belong to the field of chemical analysis and testing. Background technique [0002] Iron is one of the vital and indispensable trace elements in the human body, ranking first both in importance and in quantity. Iron is not only an important part of hemoglobin, but also a component of many enzymes and immune system compounds. Due to the important role of iron on the human body, government departments in various countries attach great importance to it, and take various effective measures to improve the iron intake environment of the people, such as adding trace salt to people's daily necessary table salt or food. However, excessive intake of iron will accumulate in the brain, kidney, liver and other parts and cause pathological changes. Silver is closely related to people's lives, and it i...
Claims
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IPC IPC(8): C09B57/00G01N21/31
CPCC09B57/007G01N21/314G01N2021/3155
Inventor 李忠玉李清萍李贝贝陆敏张宇哲徐松
Owner CHANGZHOU UNIV