Two Supramolecular Inorganic–Organic Hybrid Crystals Based on Keggin Polyoxometalates and Crown Ethers
AbstractNew supramolecular structures were designed in this work using large-sized polyoxometalates (POMs) and crown-ether-based supramolecular cations selected as building blocks. Two novel supramolecular inorganic–organic hybrids [(3-F-4-MeAnis)(crown-6)]2[SMo12O40]•CH3CN (1) and [(4-IAnis)(crown-6)]3[PMo12O40]•4CH3CN (2) (3-F-4-MeAnis = 3-fluoro-4-methylanilinium and 4-IAnis = 4-iodoanilinium) were synthesized. Crystals 1 and 2 have been characterized by infrared spectroscopy (IR) and elemental analysis (EA). Based on X-ray diffraction analysis, Crystals 1 and 2 were constructed through noncovalent bonding interactions and belong to different space groups due to the difference of the building blocks used. Supramolecular cations formed due to strong N–H···O hydrogen bonding interactions between the six oxygen atoms of crown-6 molecules and nitrogen atoms of anilinium derivatives. Crystal 1 has two different supramolecular cations with an anti-paralleled arrangement that forms a dimer through weak hydrogen bonding interactions between adjacent crown-6 molecules. Crystal 2 has three independent supramolecular cations that fill large spaces between the [PMo12O40] polyoxoanions forming a rhombus-shape packing arrangement in the ac plane. Crystals 1 and 2 are unstable at room temperature. View Full-Text
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Xiong, J.; Luo, T.; Zhang, J.; Li, X.-X.; Lv, S.-F.; Peng, J.-J.; Li, M.; Li, W.; Nakamura, T. Two Supramolecular Inorganic–Organic Hybrid Crystals Based on Keggin Polyoxometalates and Crown Ethers. Crystals 2018, 8, 17.
Xiong J, Luo T, Zhang J, Li X-X, Lv S-F, Peng J-J, Li M, Li W, Nakamura T. Two Supramolecular Inorganic–Organic Hybrid Crystals Based on Keggin Polyoxometalates and Crown Ethers. Crystals. 2018; 8(2):17.Chicago/Turabian Style
Xiong, Jun; Luo, Teng; Zhang, Jun; Li, Xiao-Xia; Lv, Shao-Fang; Peng, Jun-Jun; Li, Ming; Li, Wei; Nakamura, Takayoshi. 2018. "Two Supramolecular Inorganic–Organic Hybrid Crystals Based on Keggin Polyoxometalates and Crown Ethers." Crystals 8, no. 2: 17.