Method for preparing Y2O3:Tb<3+>@SiO2-NH2 fluorescence sensor array used for detecting organic chlorine pesticide

Abstract

The invention relates to a method for preparing a Y2O3:Tb<3+>@SiO2-NH2 fluorescence sensor array used for detecting an organic chlorine pesticide. The marking recognition sites in the fluorescence sensor array are mutually effected with organic chlorine pesticide molecules (target molecules), the target molecules and Tb<3+> on the recognition sites form an organic ligand through coordination, and change of the fluorescence intensity of Tb<3+> is used for detecting the target molecules. The method comprises the following three steps: preparing Y2O3:Tb<3+> fluorescent powder, then synthesizing a Y2O3:Tb<3+>@SiO2-NH2 fluorescence probe having capability for identifying the marking target molecules, finally, through a micromachining technology and a plasma etching method, dropping the fluid suspension of the fluorescence probe having the capability for identifying the marking target molecules on a silicon chip, naturally drying the silicon chip, and spontaneously putting the fluorescence probe materials in a micro hole to obtain the fluorescence sensor array for high-selectivity identification and high sensitive signal detection on the target molecules.

Description

Technical field [0001] The present invention relates to the field of materials science, in particular to Y with detection of organochlorine pesticides 2 O 3 :Tb 3+ @SiO 2 -NH 2 Fluorescence sensor array preparation method. Background technique [0002] In recent years, the detection of pesticides and the exploration of related fluorescent sensor arrays have attracted widespread attention from social research institutions and achieved fruitful exploration. Laboratory testing of specific pesticides has been widely used by methods such as spectroscopy, chromatography and enzyme inhibition. These traditional analytical techniques can meet the basic requirements in analysis, such as selectivity, reliability, accuracy and repeatability, but these detection methods are expensive, time-consuming, cumbersome and cumbersome, because the sample must be separated from the test. The inspection site is sent to the laboratory for analysis, and real-time on-site inspection cannot be achieved. ...

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Problems solved by technology

In 2013, Fan Ruiqing of Harbin Institute of Technology and others disclosed the invention patent in "a two-dimensional terbium coordination polymer green fluorescent material containing oxalic acid and its preparation method (CN103193812A)", abandoning the traditional use of inorganic sulfide and aluminate series, phosphate series, borate and silicate series, etc. are used as green fluorescent materials for LEDs to solve the problems of poor stability of existing organic green light-emitting materials and low yields of organic green light-emitting materials prepared by existing methods, and provide A two-dimensional terbium coordination polymer green fluorescent material containing oxalic acid and its preparation method. The fluorescent material prepared by this method has good stability and can be placed in the air for a long time without deterioration. At the same time, the invention will contain optically active Tb 3+ A new type of terbium-oxalic acid-3-methyl-2-carboxypyridine crystal was prepared by reacting with 3-methyl-2-carboxypyridine containing conjugated π bond and small molecule oxalic acid, which has accurate space as a green fluorescent material structure and molecular formula, and is beneficial to electronic transition and energy transfer, has good green luminescence performance, and the monochromaticity presented by simple operation is relatively good

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