Centre for Organic Electronics, Chemistry Building, The University of Newcastle, NSW 2308, Callaghan, Australia.
Phys Chem Chem Phys. 2011 Feb 28;13(8):3237-47. doi: 10.1039/c0cp01137a. Epub 2010 Dec 6.
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.
使用中子衍射阐明了两种最古老的离子液体（ILs），硝酸乙基铵（EAN）和乙醇铵硝酸酯（EtAN）的体相结构。使用经验势结构精修（EPSR）对光谱进行建模。结果表明，EAN 表现出源于疏溶剂相互作用的长程结构，类似于双连续微乳液或无序 L(3)-海绵相，但尺寸仅为 1nm。EtAN 中的醇（-OH）部分干扰了阳离子烷基链之间的疏溶剂相互作用，导致离子小簇而不是扩展网络。
