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Double-cascade stray light emission spectrum measuring device for in-situ monitoring of chemical and chemical reaction

A chemical reaction and emission spectrum technology, applied in measurement devices, fluorescence/phosphorescence, scientific instruments, etc., can solve the problems of narrow sample temperature control range, difficult mechanism research, slow temperature change rate, etc., achieving a high degree of modularity and solving spectral problems Distortion, stray light capable effects

Pending Publication Date: 2022-03-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is very rare that the emission spectrum measurement device produced by the company mentioned above can be linked with the chemical and chemical reaction process. The temperature control range of the sample is narrow, the temperature change rate is slow, and there are many additional reactions in the chemical reaction process, which makes the mechanism research difficult. Problems that limit the use of existing emission spectroscopy measurement devices for in-situ monitoring of chemical and chemical reactions

Method used

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  • Double-cascade stray light emission spectrum measuring device for in-situ monitoring of chemical and chemical reaction
  • Double-cascade stray light emission spectrum measuring device for in-situ monitoring of chemical and chemical reaction
  • Double-cascade stray light emission spectrum measuring device for in-situ monitoring of chemical and chemical reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Select the perovskite film as the experimental sample, first set the temperature of the sample to 30°C in the temperature-controllable in-situ reaction cell 3, and the total instrument control 5-1 controls the excitation wavelength of the continuous light source 1-1 to 500nm through instructions, and controls the first stage The wavelength of the monochromator 2-1 and the second-stage monochromator 2-2 is 500nm, and the wavelength of the third-stage monochromator 2-3 and the fourth-stage monochromator 2-4 is controlled to scan and measure from 550nm to 800nm , to control the selection of UV-Vis detector 4-1. The thin film sample is excited to an excited state by the continuous light source 1-1, which emits photons through radiation relaxation, and passes through the third and fourth stage monochromators 2-3 and 2-4 continuously, and the double cascade monochromator structure subtracts The influence of most of the stray light on the emission spectrum measurement is elimi...

Embodiment 2

[0052] Select the metal halide cluster as the experimental sample. Firstly, the temperature of the sample is set to 20°C by the temperature-controllable in-situ reaction cell 3. The wavelength of the first-stage monochromator 2-1 and the second-stage monochromator 2-2 is 300nm, and the wavelength of the third-stage monochromator 2-3 and the fourth-stage monochromator 2-4 is controlled to scan from 350nm to 570nm For measurement and control, select the UV-Vis detector 4-1. The thin film sample is excited to an excited state by the continuous light source 1-1, which emits photons through radiation relaxation, and passes through the third and fourth stage monochromators 2-3 and 2-4 continuously, and the double cascade monochromator structure subtracts The influence of most of the stray light on the emission spectrum measurement is eliminated, and the light intensity at different wavelengths is obtained through the detection of the ultraviolet-visible detector 4-1, which is fed ba...

Embodiment 3

[0054] Test the linkage between the in-situ reaction cell 3 and the laser heating module and the liquid nitrogen refrigeration module. Figure 4 It shows the temperature change and power change curve of the in-situ reaction pool laser heating module of this product. The laser heating starts at 2 minutes, and the power rises rapidly to 200W, which can quickly rise to 1000°C in a short period of time, and then maintain at a power of 150W. The temperature is constant. Figure 5 It shows the temperature change and injection volume curve of the in-situ reaction pool liquid nitrogen cooling module of this product. Liquid nitrogen is injected at a constant speed, and the temperature drops rapidly to -180°C and remains at this temperature for a long time.

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Abstract

The invention relates to a double-cascade stray light emission spectrum measurement device and method for in-situ monitoring of chemical and chemical reaction. Wherein light emitted by the tunable pulse light source or the continuous light source sequentially passes through the first-stage monochromator, the second-stage monochromator, the in-situ reaction tank, the third-stage monochromator and the fourth-stage monochromator and then is received by the ultraviolet visible detector or the near-infrared detector; light emitted by the single-wavelength pulse light source sequentially passes through the in-situ reaction tank, the third-stage monochromator and the fourth-stage monochromator and then is received by the ultraviolet visible detector or the near-infrared detector; and the data acquisition system is used as a master controller to be connected with all the components. The device can be used in linkage with a temperature-adjustable in-situ reaction tank, laser heating and liquid nitrogen refrigeration are used, the reaction temperature ranges from-196 DEG C to 1000 DEG C, the temperature change rate is 800 DEG C / s, and emission spectrum changes of a reaction system at different temperatures and different reaction time can be detected in situ to obtain reaction kinetic behavior parameters of the reaction system.

Description

technical field [0001] The invention belongs to the field of instruments and meters, and specifically relates to an in-situ monitoring chemical and chemical reaction double-cascade stray light emission spectrum measurement device and method, especially under the conditions of sample temperature infrared laser heating and liquid nitrogen cooling, in-situ monitoring An instrument and method for observing the steady-state fluorescence spectrum, phosphorescence spectrum and transient spectrum of a sample. Background technique [0002] The physical and chemical science of light is the science of studying the structure of atoms and molecules in electronically excited states and their physical and chemical properties. New functional materials provide an important basis. Molecules in an electronically excited state can easily release energy in various ways and return to the ground state. This process is called the decay or deactivation of excited state molecules, in which radiative...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/03
CPCG01N21/6402G01N21/64G01N21/0332G01N2021/6495
Inventor 韩克利赵文远杨阳刘建勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI