Variable temperature infrared light dissociation spectrum device

Abstract

The invention discloses a variable temperature infrared light dissociation spectrum device. The device includes a sample source, an ionizer, an ion guiding device, a quadrupole mass spectrometer, a deflector, a variable temperature ion trap, and a time-of-flight mass spectrometer. A sample enters the device from the sample source and is ionized by the ionizer, then the sample is ionized by the ionizer, the sample is subjected to guidance by the ion guiding device, spectrometry selection by the quadrupole mass spectrometer, the deflection of the deflector and the trapping and temperature changeby the variable temperature ion trap, and finally the infrared light dissociation and detection are carried out at the time-of-flight mass spectrometer. The wide-range temperature change (4-300K) process of an infrared light dissociation device ion trap can be realized by the variable temperature ion trap, and the effective detection of a gas phase low molecular density sample can be achieved bya whole set of variable temperature infrared light dissociation spectrum device.

Description

technical field [0001] The invention relates to a temperature-variable infrared photodissociation spectroscopy device, in particular to an infrared photodissociation spectroscopy device capable of realizing a large-scale temperature-variable process of an ion trap, and belongs to the field of molecular reaction dynamics of the subject of physical chemistry. Background technique [0002] Molecular reaction dynamics is the frontier basic research field of chemistry; it uses advanced techniques and methods of modern physical chemistry to study the dynamic structure and reaction process of elementary chemical reactions in different states and molecular systems at the atomic and molecular levels and reaction mechanism. [0003] Infrared absorption spectroscopy is a kind of molecular absorption spectroscopy, which uses the selective absorption of infrared light by substances to carry out qualitative and quantitative analysis of substances; different chemical bonds have different v...

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Problems solved by technology

[0007] In recent years, infrared photodissociation spectroscopy has produced a series of important results in the research fields of hydrated electrons, hydrated protons, and solvated clusters; the current infrared photodissociation spectroscopy is usually produced at room temperature or in an environment cooled by liquid nitrogen Ion sources, that is, the research is on the vibrational spectrum of ions at a single temperature (such as 80K or 300K), and the ion temperature cannot be changed continuously; however, temperature changes have a very significant impact on the physical and chemical properties and reaction mechanisms of substances; for example, scientists found that , the virus of Severe Acute Respiratory Syndrome (SARS) can survive at room temperature on a plastic surface for at least 24 hours, and can even survive indefinitely at 273K, and will die at 310K; however, related viruses The death mechanism is still not very clear; therefore, it is urgent to develop infrared photodissociation spectroscopy experiment technology with variable temperature function to meet the needs of scientific research

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