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Method for removing oxygen through photochemistry to protect triplet excited state of photosensitizer and application thereof

A triplet excited state, photosensitizer technology, applied in chemical instruments and methods, porphine/acrphine, azo dyes, etc., can solve problems such as lack of fluidity

Inactive Publication Date: 2018-08-03
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for removing oxygen through photochemistry to protect triplet excited state of photosensitizer and application thereof
  • Method for removing oxygen through photochemistry to protect triplet excited state of photosensitizer and application thereof
  • Method for removing oxygen through photochemistry to protect triplet excited state of photosensitizer and application thereof

Examples

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Embodiment 1

[0053] A method for photochemically removing oxygen to protect the triplet excited state of the photosensitizer is provided in this embodiment, the method is as follows: the photosensitizer shown in formula I is dissolved in DMSO, and the concentration of the photosensitizer is 1.0×10 -4 mol dm -3 , using an optical power density of 70mW cm -2 The solution is irradiated with ultraviolet light, and the process of phosphorescence growing from scratch and gradually becoming stronger can be observed. The specific phosphorescence change process is as follows figure 2 As shown, the spectrogram as Figure 3a shown.

Embodiment 2

[0055] This example provides a method for photochemically removing oxygen to protect the triplet excited state of a photosensitizer, except that the photosensitizer shown in formula III is used, and other conditions are the same as in Example 1. Phosphorescence change spectrum as shown in Figure 3b shown

Embodiment 3

[0057] A method for photochemically removing oxygen to protect the triplet excited state of the photosensitizer is provided in this embodiment, the method is as follows: the photosensitizer shown in formula I is dissolved in DMSO, and the concentration of the photosensitizer is 1.0×10 -5 mol dm -3 , using an optical power density of 0.3mW cm -2 The solution is irradiated with ultraviolet light, and it can be observed that when the optical power density is low, the time-consuming of the photoactivation process is relatively longer.

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Abstract

The invention provides a method for removing oxygen through photochemistry to protect triplet excited state of a photosensitizer and application thereof. The method comprises the following steps: adding the photosensitizer into a solvent, and irradiating a solvent containing the photosensitizer by using exciting light. Through the method, the solvent does not need to be subjected to oxygen removalmeasures such as bubbling through inert gas and the like; the oxygen in the solvent can be removed by directly irradiating the solvent containing the photosensitizer under the air condition; phosphorous light is gradually intensified in the solvent; the invention also relates to the application of the method to photoetching through gel and implementation of triplet state-triplet state annihilation photon up-conversion under the air condition.

Description

technical field [0001] The invention belongs to the field of nonlinear optical materials, and relates to a method for photochemically removing oxygen to protect the triplet excited state of a photosensitizer and its application. Background technique [0002] Triplet state: The photosensitizer molecule in the ground state absorbs excitation light of a specific wavelength, the molecule absorbs energy from the ground state and transitions to the singlet excited state, and then due to the rigidity of the molecule itself or the coordination between the molecule and the heavy metal, due to the presence of the heavy metal effect, the molecule The energy between systems can undergo intersystem crossing, from a singlet excited state to a triplet excited state. If the molecule directly emits energy in the form of light from the singlet excited state back to the ground state, this process is fluorescence emission, and the lifetime is generally on the order of nanoseconds. The form emi...

Claims

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Application Information

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IPC IPC(8): C09B47/04C09B57/00C09B57/08
CPCC09B47/045C09B57/00C09B57/08
Inventor 林进雄万仕刚陆为
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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