Rare earth complex fluorescent probe, its preparation method and application in methanol impurity detection

Abstract

The invention discloses a rare earth complex fluorescent probe, its preparation method and application in methanol impurity detection. The fluorescent probe is a compound of the following chemical formula: [Ln2(L)6(H2O)4].xH2O, wherein Ln is Tb or Eu, L as an electron-donating ligand, is salicylic acid or its derivative, and x ranges from 0 to 8. The preparation method consists of: dissolving the electron-donating ligand in water, adjusting the pH to 5-6.5, mixing the solution with a rare earth salt solution, standing or heating the obtained mixed solution till precipitation of a crystal, and filtering, washing, as well as drying the crystal so as to obtain the rare earth complex fluorescent probe. The binuclear complex synthesized in the invention as a fluorescent probe can effectively detect whether methanol is polluted by impurity solvents. And the detection method is simple, can be realized by employment of a relatively simple fluorometer, and needs no gas chromatograph and other complicated and expensive instruments, thus achieving the detection purposes of convenience and fastness.

Description

technical field [0001] The invention relates to a rare earth complex fluorescent probe and a preparation method thereof, and also relates to the application of the rare earth complex fluorescent probe in detecting whether impurities are contained in methanol and quantifying the impurities. Background technique [0002] Metal-organic complexes have undergone tremendous development in the last 20 years, and their application research has attracted much attention. However, new applications have rarely been reported recently, so how to make metal-organic complexes into new and easy-to-apply functional materials has aroused the interest of many researchers. [0003] Methanol is widely used and is the basic organic chemical raw material and high-quality fuel. It is also one of the important raw materials of pesticides and medicines. For the chemical industry, methanol is often used as a solvent or reaction medium for various reactions. Most of the above have higher requirements...

AI Technical Summary

Problems solved by technology

At present, the method of monitoring whether methanol contains impurities is generally realized by gas chromatography, but this method requires the use of large-scale GC-MS instruments, the testing process is complicated and time-consuming, and the efficiency and benefits need to be improved

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