123rd General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code INOR.P-15
Subject Preparation and gas sorption properties of a 3D In-MOF with diamond-like framework
Authors Suk bin Yoon, Youngmee Kim1, Sung-Jin Kim2, Seong Huh*
Department of Chemistry, Hankuk University of Foreign Studies, Korea
1Department of Chemistry and Nano Science, Ewha Womans University, Korea
2Department of Chemistry, Ewha Womans University, Korea
Abstract The pseudotetrahedral node, In(O2CR)4, often found in InIII-based metal-organic frameworks (MOFs) without a cluster-based secondary building unit (SBU) is a negatively charged center due to charge mismatch between cationic InIII ion and four anionic carboxylate bridging linkers. Thus, In-MOFs tend to contain counter-cations near InIII centers in the frameworks. Dialkylammonium cations such as Me2NH2+ and Et2NH2+ directly derived from N,N-dimethylformamide (DMF) or N,N-diethylformamide (DEF) solvents play a significant role to form a stable framework through charge matching. If these cations thermally derived from DMF or DEF are not suitable for crystal growth of In-MOFs, it becomes very difficult to obtain high quality single crystals for structure determination. In this context, high quality crystals of In-ABDC MOF were not easily prepared from a ditopic 4,4'-azobenzenedicarboxylic acid (H2ABDC) through a thermal reaction in DMF or DEF. We successfully overcome this problem by employing a room-temperature ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]), and the resulting three-dimensional (3D) In-ABDC MOF, [EMIM][In(ABDC)2], was structurally characterized by X-ray diffraction. The 3D framework indicates a 4-connected uninodal net with Schläfli symbol of 66 (dia). The gas sorption properties of solvent-free In-ABDC MOF were also investigated in detail.
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