Gas Sorption Properties of a New Three-Dimensional In-ABDC MOF With a Diamond Net

Abstract

The pseudotetrahedral node, [In(O 2 CR) 4 ] − , often found in In III-based metal-organic frameworks (MOFs) without a cluster-based secondary building unit (SBU) is a negatively charged center due to charge mismatch between an 8-coordinate In III ion and four anionic carboxylate bridging ligands. Thus, In-MOFs with this pseudotetrahedral node tend to bear a counter-cation near each In III center in the frameworks. Generally, dialkylammonium-based cations such as Me 2 NH + 2 and Et 2 NH + 2 directly derived from N,N-dimethylformamide (DMF) or N,N-diethylformamide (DEF) solvents during MOF formation reactions play a significant role to form a stable framework through charge matching. If these cations thermally derived from DMF or DEF were not suitable for crystal growth of In-MOFs, it becomes very challenging to obtain high quality single crystals for X-ray structure determination of the frameworks. In this context, high quality crystals of In-ABDC MOF were not easily prepared from a ditopic azobenzene-4,4'-dicarboxylic acid (H 2 ABDC) 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][BF 4 ]), and the resulting three-dimensional (3D) In-ABDC MOF, [EMIM][In(ABDC) 2 ]•DEF•H 2 O (I), was structurally characterized by X-ray diffraction. The 3D framework indicates a 4-connected uninodal net with Schläfli symbol of 6 6 (dia). The gas sorption properties of solvent-free I were also investigated in detail.

From 0D-complex to 3D-MOF: changing the antimicrobial activity of zinc(II) via reaction with aminocinnamic acids

“…Within the extensive array of cinnamic acid derivatives, the 3- and 4-amino derivatives, thanks to the presence of divergent -NH 2 and -COO - groups capable of coordinating metal ions, stand out as promising candidates for the construction of coordination polymers and Metal-Organic Frameworks (MOFs). These compounds have emerged as an extensive class of materials with a wide range of applications, spanning from energy and environment ( Wang et al, 2017 ; Choi et al, 2019 ; Jiang et al, 2022 ; Yusuf et al, 2022 ) to catalysis ( Pascanu et al, 2019 ; Alhumaimess, 2020 ; Khan et al, 2023 ; Obeso et al, 2023 ) recently they have been recognized as potential antimicrobial agents, and interest in their synthesis and solid state properties has been increasing ( Bhardwaj et al, 2018 ; Li et al, 2021 ; Liu et al, 2021 ; Yan et al, 2022 ; Zhang et al, 2022 ).…”