Mass spectrum device for ion-molecule vacuum online reaction and detection
An ion molecule, vacuum technology, applied in the field of mass spectrometer, mass spectrometer, can solve the problems of free radical reaction, unstable existence of intermediates, etc.
Inactive Publication Date: 2014-12-10
INST OF CHEM CHINESE ACAD OF SCI
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Problems solved by technology
Some methods for on-line detection of chemical reactions, such as nano-ESI double-spray method and DESI, etc., are mostly carried out under normal pressure conditions, and some intermediates are disturbed by various factors such as solvents and air and cannot exist stably, especially in The free radicals generated under electrification may have a certain impact on the reaction
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[0027] The experimental methods used in the following examples are conventional methods unless otherwise specified.
[0028] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.
[0029] Such as figure 1 As shown, it is a structural schematic diagram of a mass spectrometer for online reaction and detection of ions and molecules in a vacuum according to the present invention, which includes a mass spectrometer and a tee pipe 1 matched therewith. The injection port 4 of the mass spectrometer is connected to the tee pipe 1 (the interface is provided with 1 / 4-28UNF external thread) through threads; the injection tube I2 and the injection tube II3 are connected to the tee pipe through a ferrule nut (not shown in the figure) 1 connected; the ion transfer tube is replaced by the part of the injection tube I2 inserted into the tee tube 1, and the sample molecular ion...
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The invention discloses a mass spectrum device for ion-molecule vacuum online reaction and detection. The mass spectrum device comprises a mass spectrometer and a multi-tube which is matched with the mass spectrometer, wherein one outlet of the multi-tube is communicated with a sample inlet of the mass spectrometer and the other outlets are respectively communicated with a sample inlet tube. The mass spectrum device has the following advantages: (1) the multi-tube is connected between the sample inlet and the sample inlet tubes of the mass spectrometer, so that multi-component sample incoming is realized, the reaction raw materials also can be premixed in a three-way tube, and the samples enter into a vacuum cavity for reaction, so that the interference of the environment under normal pressure is eliminated, the air sensitive reaction is solved, benefit is brought to the detection in the middle process of the reaction and certain instable midbodies which exist momentarily also can be detected; and (2) the mass spectrum device not only can be used for the detection of online reaction, but also can be used for conventional analysis, so that the online monitoring on the (sub) ion-molecule reaction under vacuum environment, the ion-ion reaction and the molecule-molecule reaction can be realized, and an important significance is provided to the researches of the vacuum gas-phase reaction and the ultrafast reaction mechanisms.
Description
technical field [0001] The invention relates to a mass spectrometry device used for online vacuum reaction and detection of ions and molecules, and belongs to the related field of mass spectrometers. Background technique [0002] The study of reaction mechanism is of great significance in chemical synthesis. Not only because the reaction mechanism can be used as a guide to find ways to improve the reaction yield and selectivity, but also to use the reaction mechanism to find the reaction law, predict various side reactions that may occur, and even design new reactions. Therefore, the exploration and research of the reaction mechanism has been It is one of the hot spots in organic chemistry. At present, there are many methods for studying the reaction mechanism, such as spectroscopy, NMR, and computational simulation. However, most methods are indirect monitoring, and cannot directly give the molecular composition of reaction intermediates, and no method can detect all reac...
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IPC IPC(8): G01N30/72
Inventor 聂宗秀谢小波何清侯剑陈素明熊彩侨刘会会
Owner INST OF CHEM CHINESE ACAD OF SCI