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A water-soluble rhodamine-based ionic liquid probe for selective discrimination and recognition of bimetallic ions, its preparation method and application

An ion-selective, ionic liquid technology, applied in color/spectral characteristic measurement, organic chemistry, etc., can solve the problems that are difficult to meet the detection needs of biological samples, the aggregation of organic probe molecules, and do not meet the green concept, and achieve excellent anti-interference Ability, simple equipment, and the effect of green and environmental protection in the detection process

Inactive Publication Date: 2019-09-17
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Problems solved by technology

[0004] However, this method of adjusting solvents must use organic solvents, and because organic probe molecules (such as rhodamines) usually have strong hydrophobicity, the proportion of organic solvents used generally exceeds 30%, which is obviously not in line with today's The green concept advocated by the analysis industry, and it is difficult to meet the detection needs of many biological samples
In addition, when the water-organic phase co-solvent system is used, the addition of the water phase may cause the aggregation of organic probe molecules, thereby affecting the detection effect

Method used

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  • A water-soluble rhodamine-based ionic liquid probe for selective discrimination and recognition of bimetallic ions, its preparation method and application
  • A water-soluble rhodamine-based ionic liquid probe for selective discrimination and recognition of bimetallic ions, its preparation method and application
  • A water-soluble rhodamine-based ionic liquid probe for selective discrimination and recognition of bimetallic ions, its preparation method and application

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preparation example Construction

[0033] The preparation method of rhodamine B hydrazide (RhBH) can be: take rhodamine B (RhB) and hydrazine hydrate as raw material, dehydrated alcohol is as solvent, heats reflux reaction, is cooled to room temperature, rotary evaporation, then adds water and adjusts pH to 8-9, suction filtration and purification, and vacuum drying to obtain rhodamine B hydrazide (RhBH).

[0034] Preferably, the mass ratio of RhB to hydrazine hydrate is (3-5) g: (7.5-12.5) mL.

[0035] Preferably, the reaction temperature is 78-85°C, and the reaction time is 1-3h.

[0036] Preferably, the ratio of the solvent to RhB is (80-150) mL: (3-5) g.

[0037] According to the above-mentioned scheme, the preparation method of the salicylaldehyde imidazole chloride salt ionic liquid (IMI-SA) can be: take 5-chloromethyl salicylaldehyde and 1-methylimidazole as raw materials, acetonitrile as solvent, heating to reflux Reaction, cooling to room temperature, suction filtration and purification, vacuum dryin...

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Abstract

The invention discloses a water-soluble Rhodamine-based ion liquid probe for selectively distinguishing and identifying bimetallic ions and a preparation method thereof, which are applied into pure water phase to singly and selectively distinguish and identify copper ions and aluminum ions. The water-soluble Rhodamine-based ion liquid probe is prepared by dehydrating and condensing salicylaldehyde imidazole chlorate ion liquid and Rhodamine B hydrazide, and has the advantages that the cost of raw materials is low, the obtaining is easy, the preparation is simple and convenient, the water solubility is good, and the like; the trace copper and alumnum can be detected at high efficiency in pure water environment; by utilizing the obvious difference of response times of copper ions and aluminum ions, the selective distinguishing and identifying under the copper and aluminum co-existence environment is realized.

Description

technical field [0001] The invention relates to the field of detection of multimetal ions, in particular to a water-soluble rhodamine-based ionic liquid probe capable of selectively distinguishing and identifying double metal ions, a preparation method and an application thereof. Background technique [0002] In recent years, photochemical sensing based on organic probe molecules has developed into a popular method in the field of heavy metal detection. Among them, using a single probe to simultaneously detect multiple target ions (ie, "one-to-many" detection) has attracted much attention due to its outstanding advantages such as high efficiency and low cost. And this "one-to-many" detection provides new possibilities for the development of molecular logic gates, molecular keypad locks, and molecular experimental equipment. [0003] Although "one-to-many" detection has many advantages, there are often significant mutual interferences between different response ions in the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D491/107G01N21/31
Inventor 高强胡策策常丽丽周文俊
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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