Stable In-metal-organic skeleton in boiling water and hydrochloric acid aqueous solution, and preparation method and application thereof

Abstract

The invention discloses a stable In-metal-organic skeleton in boiling water and hydrochloric acid aqueous solution, and a preparation method and application thereof, and belongs to the technical field of crystalline state materials. A chemical molecular formula is [In3(TTTA)2(OH)3], wherein the TTTA is an organic ligand, namely, (2E,2'E,2''E)-3,3'-3''-(2,4,6-trimethyl)-isotriacrylic acid. According to the stable In-metal-organic skeleton in the boiling water and the hydrochloric acid aqueous solution, and the preparation method and the application thereof, the [In3(TTTA)2(OH)3] is soaked in dichloromethane solution for activating and is subjected to a single-crystal-to-single-crystal transformation process to obtain a new material; the In-metal-organic skeleton can still remain the stability of a structure after being treated by the boiling water and the hydrochloric acid aqueous solution with the pH of 4; moreover, the In-metal-organic skeleton has large hole size and specific surface area, and can be used as an adsorption material for selectively adsorbing and separating C2H2 / CO2 and C2H2 / CH4.

Description

Technical field [0001] The present invention belongs to the technical field of crystalline materials, and the technology relates to metal-organic coordination polymer materials, especially a metal-organic framework (MOF) of indium (In) that is stable in boiling water and aqueous hydrochloric acid solution, and single crystal to single crystal Crystal transformation process and its application. [0002] technical background [0003] Industrial gas is called the "blood" of industry. With the rapid development of China's economy, industrial gas, as one of the basic industrial elements of the national economy, has become increasingly prominent in its important position and role in the national economy. According to the specific uses of different industrial production links, there are extremely strict requirements for the purity or composition of different gases, the maximum allowable content of harmful impurities, and the packaging, storage and transportation of products. They are hig...

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Problems solved by technology

[0005] In metal-organic framework materials occupy a place in the large family of MOFs materials, but the stability of most In-MOFs is not so satisfactory, the main reason is (1) the coordination formed by In atoms and oxygen or nitrogen The bond is not a very stable type. In the aqueous solution system, it is easily destroyed by the attack of water molecules; (2) In metal-organic framework materials are generally ionic frameworks (mostly anionic frameworks), and their channels contain counterweights (cationic frameworks). ) ions to balance the charge, which to some extent restricts the chemical stability of its structure

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