Two-dimensional covalent polymer carbon skeleton polymer film and its preparation method and application
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A polymer film, carbon skeleton technology, applied in semiconductor/solid-state device manufacturing, electric solid-state devices, semiconductor devices, etc., can solve the problem of high cost and achieve the effect of reducing the reaction cost
Active Publication Date: 2021-08-10
INST OF CHEM CHINESE ACAD OF SCI
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Another type of conjugated polymer formed by coupling organic small molecules through the Ullmann reaction on the metal surface, usually the reaction temperature is above 400 ° C, and the formation of a relatively ordered film needs to be reacted in an ultra-high vacuum environment. Higher cost of industrial production
Regardless of the above methods, the large-scale production of two-dimensional covalent polymer films is a huge challenge.
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Embodiment 1
[0061] experiment procedure:
[0062] (1) Weigh one equivalent of a small organic molecule with two alkynyl groups in a conjugated structure, mix 2.0 equivalents of DBU and 2.0 equivalents of NBS in about 10 mL of acetonitrile solution, react at 25°C for 1 hour, and quench with a small amount of water The reaction was quenched, followed by extraction with dichloromethane solvent. The obtained mixed product was purified by column chromatography (the solvent used was n-pentane, 400 mesh silica gel) to obtain the monomer for the subsequent polymerization reaction. ( Figure 9 )
[0063] (2) Wash the metal substrate with a mixed solution of water, ethanol and acetic acid, with a volume ratio of 1:1:1. Blow dry the metal substrate with high-purity nitrogen, and place it in a double-temperature zone tube furnace for high-temperature activation. The gas atmosphere is a mixture of hydrogen and argon, with a hydrogen concentration of 10%. ℃, keep for 60min, then cool down naturally...
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Abstract
The invention discloses a two-dimensional covalent carbon skeleton polymer film, a preparation method and application thereof. The invention mainly uses the diacetylenyl organic compound as a monomer, heats and illuminates on a metal base to obtain a full-carbon polymer film. The metal substrate is etched, the polymer film is cleaned, transferred to the substrate for device testing, and the electronic properties of the material are measured. The thickness of the all-carbon polymer film prepared by the invention is between 30nm and 500nm, and the mobility is two to three orders of magnitude higher than that of other alkyne two-dimensional polymers. Moreover, the preparation process does not require a vacuum degree, and the reaction temperature is between 200 and 300°C.
Description
technical field [0001] The invention belongs to the field of organic two-dimensional semiconductor materials, and specifically relates to a two-dimensional covalent carbon skeleton polymer film and a preparation method and application thereof. Background technique [0002] Since graphene was first discovered in 1962 (H.P.Boehm, A.Clauss, G.O.Fischer, U.Hofmann, Zeitschrift Fur Anorganische Und Allgemeine Chemie, 316 (1962) 119-127), it was re-exfoliated and characterized in 2004 (K.S.Novoselov , A.K.Geim, S.V.Morozov, D.Jiang, Y.Zhang, S.V.Dubonos, I.V.Grigorieva, A.A.Firsov, Science.306(2004):666–669), scientists found that graphene has extraordinary mechanical properties (C.Lee , X.D.Wei, J.W.Kysar, J.Hone, Science, 321(2008), 385), optical properties (R.R.Nair, P.Blake, A.N.Grigorenko, K.S.Novoselov, T.J.Booth, T.Stauber, N.M.R.Peres.A.K.Geim, Science, 320(2008), 1308), thermal conductivity (A.A.Balandin, S.Ghosh, W.Bao, I.Calizo, D.Teweldebrhan, F.Miao, C.N.Lau, Nano Le...
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