Amphiphilicity determines nanostructure in protic ionic liquids
Amphiphilicity determines nanostructure in protic ionic liquids
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DOI：
10.1039/c0cp01137a
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发表时间：
2011-01-01
影响因子：
3.3
通讯作者：
Atkin, Rob
中科院分区：
文献类型：
--
作者：
Hayes, Robert;Imberti, Silvia;Atkin, Rob
用中子衍射法研究了两种最古老的离子液体硝酸乙铵（EAN）和硝酸乙醇铵（EtAN）的结构。使用经验势结构精修（EPSR）对光谱进行建模。结果表明，EAN表现出疏溶剂起源的长程结构，类似于双连续微乳液或无序的L-3-海绵相，但具有仅1 nm的畴尺寸。EtAN中的醇（-OH）部分干扰阳离子烷基链之间的疏溶剂缔合，导致小的离子簇，而不是扩展的网络。
The bulk structure of the two oldest ionic liquids (ILs), ethylammonium nitrate (EAN) and ethanolammonium nitrate (EtAN), is elucidated using neutron diffraction. The spectra were modelled using empirical potential structure refinement (EPSR). The results demonstrate that EAN exhibits a long-range structure of solvophobic origin, similar to a bicontinuous microemulsion or disordered L-3-sponge phase, but with a domain size of only 1 nm. The alcohol (-OH) moiety in EtAN interferes with solvophobic association between cation alkyl chains resulting in small clusters of ions, rather than an extended network.