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Room-temperature phosphorescent polymer based on polyvinyl alcohol doping as well as preparation method and application of room-temperature phosphorescent polymer

A technology of polyvinyl alcohol doping and room temperature phosphorescence, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor luminescence performance and expensive preparation costs, etc.

Active Publication Date: 2021-11-16
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a polyvinyl alcohol-doped room-temperature phosphorescent polymer and its preparation method and application, aiming at solving the problem of high preparation cost and poor luminescent performance of existing room-temperature phosphorescent materials. bad question

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  • Room-temperature phosphorescent polymer based on polyvinyl alcohol doping as well as preparation method and application of room-temperature phosphorescent polymer
  • Room-temperature phosphorescent polymer based on polyvinyl alcohol doping as well as preparation method and application of room-temperature phosphorescent polymer
  • Room-temperature phosphorescent polymer based on polyvinyl alcohol doping as well as preparation method and application of room-temperature phosphorescent polymer

Examples

Experimental program
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Effect test

Embodiment 1

[0046]Weigh 450mg of PVA and dissolve it in pure water (15mL), take 2ml of the solution, add TPB-3NH2 (1mg), stir vigorously overnight, the next day, take 20μL of the mixture and add it dropwise to the quartz plate, volatilize slowly, and anneal at 80°C for 1h , to obtain an amorphous film T1.

[0047] The amorphous thin film T1 that present embodiment is made is carried out transient state and retardation spectrum test, and the result is as follows figure 2 shown. The figure shows that the prepared thin film T1 has fluorescent and phosphorescent properties. The fluorescence emission maximum is at 422nm, and the phosphorescence maximum emission is at 519nm.

Embodiment 2

[0049] Weigh 450mg of PVA and dissolve it in pure water (15mL), take 2ml of the solution, add TPB-3COOH (1mg), stir vigorously overnight, and the next day, take 20μL of the mixture and add it dropwise to a quartz plate, slowly volatilize, and anneal at 80°C for 1h , to obtain an amorphous film T2.

[0050] The amorphous thin film T2 that present embodiment is made is carried out transient state and delay spectrum test, and the result is as follows image 3 shown. The figure shows that the prepared thin film T1 has fluorescent and phosphorescent properties. The fluorescence emission maximum is at 435nm, and the phosphorescence maximum emission is at 500nm.

Embodiment 3

[0052] Weigh 450mg of PVA and dissolve it in pure water (15mL), take 2ml of the solution, add TPB-3OH (1mg), stir vigorously overnight, and the next day, take 20μL of the mixture and add it dropwise on the quartz plate, slowly volatilize, and anneal at 80°C for 1h , to obtain an amorphous film T3.

[0053] The amorphous thin film T3 that present embodiment is made is carried out transient state and retardation spectrum test, and the result is as follows Figure 4 shown. The figure shows that the prepared thin film T1 has fluorescent and phosphorescent properties. The fluorescence emission maximum is at 385nm, and the phosphorescence maximum emission is at 500nm.

[0054] Further, the phosphorescence attenuation test was carried out on the amorphous films T1-T3 prepared in the present embodiment 1-embodiment 3, and the results were as follows Figure 5 As shown, the phosphorescence decay times of the amorphous films T1-T3 are respectively 1412ms, 1034ms, and 1647ms through e...

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Abstract

The invention discloses a room-temperature phosphorescent polymer based on polyvinyl alcohol doping and a preparation method and application thereof. The preparation method comprises the following steps: dispersing polyvinyl alcohol in water to obtain a polyvinyl alcohol solution; adding an aromatic compound containing hydrogen bond donor and acceptor groups into the polyvinyl alcohol solution, and stirring to obtain a blended solution; and carrying out annealing treatment on the blended solution to prepare the room-temperature phosphorescent polymer based on polyvinyl alcohol doping. A commercial polymer polyvinyl alcohol (PVA) is selected as a host material, an aromatic compound containing different hydrogen bond donor and acceptor groups is selected as a guest material, the host material and the guest material can realize the phosphorescent property of guest molecules through hydrogen bond interaction, and the room-temperature phosphorescent polymer is formed; in addition, due to hydrogen-bond interaction of polyvinyl alcohol, the room-temperature phosphorescent polymer can realize responsiveness to water and heat.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a polyvinyl alcohol-doped room temperature phosphorescent polymer and its preparation method and application. Background technique [0002] Organic room temperature phosphorescent materials, due to their large Stokes shift, long life and long afterglow, are favored by researchers in biological imaging, organic optoelectronics, anti-counterfeiting marks, and sensing, showing potential application value . [0003] The generation of organic phosphorescence involves two key processes: (1) improving the excitation from the lowest singlet state (S 1 ) to the excited triplet state (T n ) and from the lowest excited triplet state (T 1 ) to ground state (S 0 ) intersystem crossing (ISC) efficiency, which can be effectively achieved by enhancing the spin-orbit coupling or reducing the energy gap between singlet and triplet states. (2) Inhibit the non-radiative transition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08L29/04C08K5/18C08K5/092C08K5/13C08J5/18
CPCC09K11/06C08J5/18C09K2211/1425C08J2329/04C08K5/18C08K5/092C08K5/13
Inventor 熊玉王德亮吴洪卓王东唐志姣
Owner SHENZHEN UNIV
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