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Gas Adsorption in R 2 ‐MOF‐5 Difunctionalized with Alkyl Groups
Author(s) -
Sugamata Koh,
Kobayashi Sho,
Iihama Teruyuki,
Minoura Mao
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100466
Subject(s) - chemistry , thermogravimetric analysis , alkyl , sorption , metal organic framework , solvent , adsorption , zinc , fourier transform infrared spectroscopy , solvothermal synthesis , powder diffraction , infrared spectroscopy , inorganic chemistry , polymer chemistry , nuclear chemistry , organic chemistry , chemical engineering , crystallography , engineering
Zinc terephthalate metal−organic framework (MOF) MOF‐5 and some of its dialkylated derivatives ( R 2 ‐MOF‐5 ; R=Me, Et, Pr, Bu) were obtained from a solvothermal synthesis using 2,5‐dialkyl‐1,4‐benzenedicarboxylic acids with zinc nitrite. The effect of the solvent on the solvothermal synthesis of R 2 ‐MOF‐5 was investigated. For R=H and Me, interpenetrating or non‐interpenetrating MOFs obtained depending on the choice of reaction solvent, while for R=Et, Pr, and Bu, no such solvent effect was observed, and only jungle‐gym‐type MOFs were generated. All compounds were fully characterized using powder X‐ray diffraction analysis (PXRD), Fourier‐transform infrared (FT‐IR) spectroscopy, and thermogravimetric analysis (TGA). After activation, all these compounds exhibit significant porosity, as confirmed by N 2 ‐, H 2 ‐, and CO 2 ‐sorption experiments. The N 2 ‐adsorption capacity of these compounds depends on the size of the attached alkyl groups, while the H 2 ‐uptake values tend to increase for the alkyl‐functionalized MOFs relative to the unfunctionalized parent MOFs and exhibit a maximum value for Pr 2 ‐MOF‐5 .