Supramolecular cations of (m-halogenated-anilinium)(dibenzo[18]crown-6) in Keggin [SMo12O402−] polyoxometallates
Supramolecular cations of (m-halogenated-anilinium)(dibenzo[18]crown-6) in Keggin [SMo12O402−] polyoxometallates
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DOI：
10.1039/c4ce01988a
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发表时间：
2015
期刊：
影响因子：
3.1
通讯作者：
J. Xiong;K. Kubo;S. Noro;T. Akutagawa;Takayoshi Nakamura
中科院分区：
文献类型：
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作者：
J. Xiong;K. Kubo;S. Noro;T. Akutagawa;Takayoshi Nakamura
四种超分子阳离子（m-XAni+）（DB[18]冠-6）（X = F、Cl、Br或I; Ani+ =苯胺鎓离子; DB[18]crown-6 = dibenzo[18]crown-6）被引入Keggin [SMo 12 O 4 O2-]聚阴离子的晶体中，形成[（m-XAni+）（DB[18]crown-6）]2[SMo 12 O 4 O2-]·4CH 3CN（对于X = F、Cl、Br或I，为1、2、3或4）通过氢键相互作用。晶体1、2、3和4彼此同晶，在单斜空间群P21/n中结晶。超分子阳离子（m-XAni+）（DB[18]crown-6）是通过N-H+-CH 2 O氢键相互作用构建的。[SMo 12 O 402-]多氧阴离子通过与DB[18]冠-6的弱C-H-O氢键相互作用在三维空间无限延伸。在晶体1、2和3中观察到间位卤素原子的无序。由于与周围分子的弱相互作用，（m-XAni+）阳离子的旋转自由度被抑制。
Four supramolecular cations (m-XAni+)(DB[18]crown-6) (X = F, Cl, Br or I; Ani+ = anilinium ion; DB[18]crown-6 = dibenzo[18]crown-6) were introduced into crystals of a Keggin [SMo12O402−] polyanion to form [(m-XAni+)(DB[18]crown-6)]2[SMo12O402−]·4CH3CN (1, 2, 3 or 4 for X = F, Cl, Br or I) through a hydrogen-bonding interaction. Crystals 1, 2, 3 and 4, which were isomorphous to each other, crystallized in the monoclinic space group P21/n. Supramolecular cations (m-XAni+)(DB[18]crown-6) were constructed by a N–H+⋯O hydrogen-bonding interaction. [SMo12O402−] polyoxoanions were infinitely extended in three dimensions through a weak C–H⋯O hydrogen-bonding interaction with DB[18]crown-6. Disorder of the halogen atoms at the meta-position was observed in crystals 1, 2 and 3. The rotational freedom of the (m-XAni+) cations was suppressed because of weak interactions with surrounding molecules.