Room Temperature Synthesis of Metal - Organic Frameworks /MOFs

Autor: Getachew, Negash, Chebude, Yonas, Sánchez Sánchez, Manuel, Díaz Carretero, Isabel
Rok vydání: 2013
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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Popis: Trabajo presentado en el 29th Annual Congress of the Chemical Society of Ethiopia, celebrado en Adís Abeba (Etiopía) del 22 al 23 de febrero de 2013.
Metal-Organic Frameworks jMOFsj are a new class of hybrid inorganic ­ organic materials. They are important in gas in gas storage and purification, separation, catalysis, biomedical and various other possible applications. The synthesis of MOFs is frequently performed by solvothermal method. The synthesized MOFs are characterized with various techniques: X Ray Oiffraction (XRO), Thermogravimetric Analysis (TGA), NrAdsorption and Electron, Microscopy (Scanning, SEM). Unlike some other microporous materials such as zeolites, MOFs can be alternatively prepared at room temperature (RT), what infers relevant environmental and energetic advantages. Following the RT method we synthesized different MOFs from different metal salts and linkers. Zinc ion /Zn2+/ and terephtalic acid /H2BOC/ MOF is one of these syntheses. The result produced a two dimensional (20) MOF herein called N-MOF-2-RT jZn2(BOC)J, with a BET surface area of 290 m 2 jg. Oifferent phases were found by changing only the molar ratio of the two solvents, OMF and H20, including the archetype MOF called MOF-5. Replacing the metal ion with Mg2+ another 20 MOF of magnesium herein called N-MB-MOF jMg(BOC)(H20)J with BET surface area of 240 m 2 jg was synthesized. This MOF was found to be very stable, up to 600 QC. In another synthesis of Cu2+ with H3BTC (H3BTC = 1, 3, 5 ­ benzenetricarboxylic acid), a Cu - BTC MOF herein called N-HKUST-1-RT jCu3(BTc)J with a BET surface area of 1170 m2 jg was synthesized. The BET surface area of the commercial MOF jHKUST-1j, measured under similar condition was found to be 1555 m2/g.
Databáze: OpenAIRE
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