Metal organic-inorganic hybrid crystal based on 2-F-5 methylpyridine ligand as well as preparation method and application of metal organic and inorganic hybrid crystal

A 2-F-5, picoline technology, applied in organic chemistry methods, organic chemistry, bismuth organic compounds, etc., can solve the problems of limiting the commercial application of lead halide-based hybrid perovskites, easy decomposition, poor stability, etc.

Active Publication Date: 2020-10-23
TIANJIN NORMAL UNIVERSITY
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Problems solved by technology

However, the lead halide-based hybrid perovskite has poor stability, and it is easy to decompose under the conditions of heat, ultraviolet light and humidity; and the lead halide-ba

Method used

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  • Metal organic-inorganic hybrid crystal based on 2-F-5 methylpyridine ligand as well as preparation method and application of metal organic and inorganic hybrid crystal
  • Metal organic-inorganic hybrid crystal based on 2-F-5 methylpyridine ligand as well as preparation method and application of metal organic and inorganic hybrid crystal
  • Metal organic-inorganic hybrid crystal based on 2-F-5 methylpyridine ligand as well as preparation method and application of metal organic and inorganic hybrid crystal

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preparation example Construction

[0032] The present invention provides a method for preparing the metal-organic-inorganic hybrid crystal based on 2-F-5 picoline ligand, comprising the following steps:

[0033] Mixing hydrobromic acid, 2-F-5picoline, bismuth bromide and methanol, performing a solvothermal reaction, and obtaining metal-organic-inorganic hybrid crystals based on 2-F-5picoline ligands after cooling down.

[0034] In the present invention, the molar ratio of the 2-F-5 picoline to bismuth bromide is preferably 41:10; the volume ratio of the 2-F-5 picoline to methanol is preferably 0.1-0.2:9 ~11. In the present invention, the mass concentration of the hydrobromic acid is preferably 48%, and the volume ratio of the 2-F-5 picoline to the hydrobromic acid is preferably 0.1-0.2:9-11.

[0035] In the present invention, the solvothermal reaction is preferably carried out in a reactor.

[0036]In the present invention, the methanol functions as a solvent. In the present invention, the methanol is prefer...

Embodiment 1

[0058] (1) Mix 0.1mL hydrobromic acid 47% (w / w) and 0.1371g 2-F-5 picoline for 30 minutes, then add 2mL methanol and stir, weigh 0.5543g bismuth bromide and add it into the mixed solution , transfer the liquid mixture to a 23mL reaction kettle, and then add 6mL of methanol;

[0059] (2) Rise from 25°C to 165°C in 3 hours, keep at 165°C for 12 hours, and finally cool down to room temperature at 0.1°C / min;

[0060] (3) Sample treatment: separate the sample crystal from the liquid in the reaction kettle in the experiment, transfer the sample to toilet paper with tweezers, dip the remaining liquid, transfer the crystal to a petri dish and let the crystal dry in a 60°C drying oven dry, and the orange (C 7 h 9 NF) 2 [BiBr 4 ] The crystals are picked out with tweezers and preserved.

[0061] For income (C 7 h 9 NF) 2 [BiBr 4 ] Crystal structure is determined, the method is as follows:

[0062] At ambient temperature, using γ-ω scanning technology, measured on a Brukes APEX ...

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Abstract

The invention provides a metal organic-inorganic hybrid crystal based on a 2-F-5 methylpyridine ligand, and belongs to the technical field of photoelectric materials; the molecular formula of the metal organic-inorganic hybrid crystal is (C7H9NF)2[BiBr4], the space group is P21/n, and the cell parameters comprise alpha=90 degrees, beta=109.462(2) degrees, and gamma=90 degrees. In the invention, the 2-F-5 methylpyridine ligand has a good electron deficiency characteristic and is an ideal electron donating acceptor; the obtained (C7H9NF)2[BiBr4] metal organic-inorganic hybrid crystal has a goodphotoelectric effect after being hybridized with [BiBr4]<2->, and has a special photoresponse property under a current test, that is, the photoconductive resistance is increased after light is added,so that the (C7H9NF)2[BiBr4] metal organic-inorganic hybrid crystal can be used as a photoresponse material of a laser alarm.

Description

technical field [0001] The invention relates to the technical field of optoelectronic materials, in particular to a metal-organic-inorganic hybrid crystal based on 2-F-5 picoline ligand and its preparation method and application. Background technique [0002] Photodetectors based on semiconductor materials can convert optical signals into electrical signals, and have a wide range of applications in optical imaging sensors, security monitoring, and chemical / biological sensing. Most photodetectors are made of inorganic materials such as InSe, ZnO, MoS 2 、WS 2 , but the application of such materials is still limited due to the disadvantages of slow photoresponse, high material preparation cost, and complicated preparation process. [0003] Lead halide-based organic-inorganic hybrid perovskite has extremely high light absorption coefficient and balanced electron and hole mobility, ultra-long diffusion length and lifetime of photogenerated carriers, low trap density, small exci...

Claims

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Application Information

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IPC IPC(8): C07F9/94G01N21/27G08B3/10
CPCC07F9/94G08B3/10G01N21/27C07B2200/13Y02E10/549
Inventor 王守宇贾云东刘卫芳马晓婷陈畅
Owner TIANJIN NORMAL UNIVERSITY
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