QUILL, The Queen's University of Belfast, Belfast, BT9 5AG, UK.
Phys Chem Chem Phys. 2013 Apr 7;15(13):4518-26. doi: 10.1039/c3cp44294b.
Buffering of Lewis acidic chlorometallate ionic liquids is a useful tool to modify their properties for electrochemical and catalytic applications. Lewis acidic chlorogallate(iii) ionic liquids containing the 1-octyl-3-methylimidazolium cation, buffered with sodium chloride, were studied using (71)Ga NMR spectroscopy and cyclic voltammetry. All the studied Lewis acidic compositions (0.50 < χGaCl3 ≤ 0.75) could be buffered to mild or moderate acidity, but not to neutrality. Electrodeposition of gallium from such buffered systems was possible, yielding deposits of improved morphology over the unbuffered ionic liquids, due to the constant melt composition maintained by the buffer. These findings were in a stark contrast with older studies on chloroaluminate(iii) ionic liquids buffered with sodium chloride.
路易斯酸性氯金属盐离子液体的缓冲作用是一种有用的工具，可以改变其电化学和催化应用的性质。使用 (71)Ga NMR 光谱和循环伏安法研究了含有 1-辛基-3-甲基咪唑阳离子的路易斯酸性三氯化镓(iii)离子液体，并用氯化钠缓冲。所有研究的路易斯酸性成分（0.50 < χGaCl3 ≤ 0.75）都可以缓冲到温和或中等酸度，但不能缓冲到中性。从这种缓冲体系中电沉积镓是可能的，由于缓冲剂保持了恒定的熔体组成，因此与未缓冲的离子液体相比，沉积的形貌得到了改善。这些发现与以前用氯化钠缓冲的三氯化铝(iii)离子液体的研究形成了鲜明的对比。
