Two Supramolecular Inorganic–Organic Hybrid Crystals Based on Keggin Polyoxometalates and Crown Ethers

Crystals

Jun Zhang¹  Wei Li¹  Shao-Fang Lv¹  Teng Luo¹  Jun-Jun Peng¹  Jun Xiong¹  Ming Li¹  Xiao-Xia Li¹  Takayoshi Nakamura² 

[1] College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China;Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0812, Japan;

关键词: supramolecular chemistry;    inorganic–organic hybrids;    polyoxometalates;    crown ethers;   

DOI  :  10.3390/cryst8020017

来源: DOAJ

【 摘 要 】

New 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)([18]crown-6)]2[SMo12O40]•CH3CN (1) and [(4-IAnis)([18]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 [18]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 [18]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.

【 授权许可】

Unknown