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Method for creating singlet oxygen by using solid peroxide or hyperoxide as chemical source

A technology of solid peroxide and superoxide, applied in the direction of oxygen preparation, etc., can solve the problems of slow reaction rate, low output rate, low singlet oxygen production efficiency, etc., and achieve the effect of easy operation and low cost

Inactive Publication Date: 2007-09-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first type of method is gas discharge method, such as microwave discharge method, radio frequency discharge method and DC discharge method, etc., this type of method can directly generate singlet oxygen in the gas phase through gas discharge, but due to O 2 ( 3 ∑ g - ) → O 2 ( 1 Δ g ) is spin forbidden, the production efficiency of singlet oxygen is generally relatively low, and the concentration in the gas phase is only more than ten percent; and the discharge gas contains other plasmas with complex components; in addition, high-power oxygen Iodine laser requires huge power supply equipment, and it is difficult to amplify
The second category is photochemical methods, one of which is the method of directly optically pumping liquid oxygen, or the method of direct photolysis of ozone. These two methods are as inefficient as the gas discharge method and require a huge light source.
The gas-solid reaction system produces water at the same time during the reaction process; the reaction heat is relatively large, and the reaction heat accumulation is serious; in addition, the gas-solid reaction contact area is small, the reaction rate is slow, and the reaction product is difficult to escape from the solid surface and other defects, making its output The rate is low, it is difficult to scale up the application
[0011] These factors hinder the further popularization and application of oxygen iodine chemical lasers, especially the application of small and medium-sized oxygen iodine lasers in industrial processing

Method used

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  • Method for creating singlet oxygen by using solid peroxide or hyperoxide as chemical source
  • Method for creating singlet oxygen by using solid peroxide or hyperoxide as chemical source
  • Method for creating singlet oxygen by using solid peroxide or hyperoxide as chemical source

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Embodiment 1: sodium peroxide-chlorine system: Na 2 o 2 -Cl 2

[0055] In a self-processing stainless steel fixed bed reactor, first spread 4-6mm glass beads on the bottom of the reactor, just to bury the inlet distribution pipe, and add 40g of sodium peroxide powder on the glass beads , and then add a small amount of glass beads on the powder layer to prevent the air flow from blowing away the sodium peroxide powder layer, vacuumize the reactor to keep the reactor pressure at about 40torr, and then react with chlorine gas. Directly align the optical fiber head coupled with OMA-V spectrometer and CCD spectrometer to the test window in the reactor to monitor the radiation signal of singlet oxygen in the gas phase. The spectrometer can easily monitor the near-infrared 1270nm of singlet oxygen Single-molecule radiation signals, but no bimolecular synergistic radiation signals at 6340nm or 703nm in the visible region.

Embodiment 2

[0056] Embodiment 2: lithium peroxide-carbon tetrachloride-chlorine system: Li 2 o 2 -CCl 4 -Cl 2

[0057] First add 60ml of carbon tetrachloride into a 100ml three-necked flask, then add 2g of off-white lithium peroxide powder, vacuumize to keep the pressure of the reactor below 100torr, stir magnetically, and then pass through a bottom with evenly distributed Chlorine gas is fed into the small-hole glass distributor for reaction, and the reactor pressure is kept at 150-300 torr. Weak red light can be observed during the reaction, and the solid powder is still suspended in carbon tetrachloride after the reaction. Point the optical fiber head coupled with the OMA-V spectrometer and the CCD spectrometer directly to the three-necked flask to monitor the radiation signal of singlet oxygen. The spectrometer can easily monitor the strong near-infrared 1270nm singlet oxygen Molecular radiation signals and weak bimolecular synergistic radiation signals at 6340nm or 703nm in the ...

Embodiment 3

[0058] Embodiment 3: sodium peroxide-carbon tetrachloride-chlorine system: Na 2 o 2 -CCl 4 -Cl 2

[0059] The reaction process is the same as in Example 2, except that the solid reactant 2g of lithium peroxide is replaced by 6g of sodium peroxide for reaction, and the reactor pressure is maintained at 150 to 300 torr. The spectrometer can easily monitor the strong 1270nm unimolecular radiation signal in the near infrared of singlet oxygen and the weak 6340nm or 703nm bimolecular synergistic radiation signal in the visible region.

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Abstract

The invention discloses a preparing method of singlet oxygen with solid hyperoxide or hyperoxide as chemical source, which comprises the following steps: setting alkali metal of inorganic solid or hyperoxide of alkali earth metal or superoxide as chemical source under the condition of room temperature and vacuum pressure; reacting with halide gas; getting singlet oxygen. This invention is a chemical reaction system, which possesses high effect, safe and strong adaptability.

Description

technical field [0001] The present invention relates to the production of singlet oxygen, specifically a method for producing singlet oxygen with solid peroxide or superoxide as a chemical source, which is a series of efficient, safe and scalable methods for producing singlet oxygen Good, adaptable chemical reaction system. This series of chemical reactions is based on solid alkali metal or alkaline earth metal peroxide or superoxide as raw material and halogen gas and water to produce singlet oxygen in different ways. These methods of generating singlet oxidation can be applied in chemical oxygen iodine laser (COIL) and also in other fields such as medicine, biology and synthetic organic chemistry. Background technique [0002] singlet oxygen ( 1 Δ g ) is the ground state oxygen ( 3 ∑ g - ), the energy of the first electronic excited state of ) is 22.5kJ / mol higher than that of ground state oxygen, and its excited state lifetime is as long as 45-70min. Therefore, sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/02
Inventor 李庆伟陈方桑凤亭金玉奇多丽萍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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