Water-soluble Rhodamine-based ion liquid probe for selectively distinguishing and identifying bimetallic ions and preparation method and application

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...

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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

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