Novel rhodamine fluorescence probe

Abstract

The invention provides a novel rhodamine fluorescence probe, and belongs to the field of function materials. The novel rhodamine fluorescence probe provided by the invention is characterized in that rhodamine B (RhB) is used as a raw material and is modified by using diamine so as to prepare rhodamine lactam, further the rhodamine lactam reacts with maleic anhydride (MAH) and amantadine so as to obtain the rhodamine fluorescence probe, and the novel rhodamine fluorescence probe contains multiple amido functional groups and carbon-carbon double bonds, wherein the multiple amido functional groups can react with metal ions, and the carbon-carbon double bonds can react with Hg<2+>. After the spiral rhodamine lactam compound is combined with heavy metal particles, the protonation of lactam nitrogen atoms can result in the reduction of the charge density of the nitrogen atoms, thus the cracking of a C-N chemical bond at the spiral center is triggered, so as to generate the fluorescence change and the color change. The obtained rhodamine derivative has relatively good recognition capability on mercury ions and iron ions in a water solution, the detection limit of the obtained rhodamine derivative on the iron ions reaches 8.3ppm, and the detection limit of the obtained rhodamine derivative on the mercury ions reaches 4.7ppm. The prepared rhodamine derivative can serve as the fluorescence probe and is widely applied to the fields such as environmental engineering, detection and the like.

Description

technical field [0001] The invention relates to the design and preparation of rhodamine fluorescent probe molecules and belongs to the field of functional materials. Background technique [0002] With the development of industry, more and more heavy metal ions are lost to the natural environment, which brings serious environmental hazards. For example, mercury ions are easily oxidized to methylmercury in aqueous solution, which has the potential to affect humans and natural ecosystems through the food chain. Long-term exposure to high concentrations of mercury ions will cause serious damage to the central nervous system and other organs such as the heart, kidneys, lungs, etc.; at the same time, due to the bactericidal effect of silver in recent years, the use of silver is increasing. For example, silver is incorporated into detergents and wound dressings, etc. After use, these silver nanoparticles and ions end up in rivers and so on. Although the original methods for the de...

AI Technical Summary

Problems solved by technology

The currently studied rhodamine and its derivatives generally have good detection ability for a metal ion, but poor detection for other ions, that is, a rhodamine derivative can only detect one ion; If the composition of the test solution is not clear, multiple tests are required to determine the ions contained in the test solution

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