FeCl3 是一種已知的氧化劑。將FeCl3與離子液體結合，形成鐵氯陰離子型的離子液體 [BPIM]FeCl4、[BMIM]FeCl4、[MMIM]I/FeCl3，並透過物理吸附的方式，將離子液體定床於氧化鋁載體上，成為負載型離子液體催化劑，其中 [BPIM] = 1-Butyl-3-phenylethyl-imidazolium，[BMIM] = 1-Butyl-3-methyl-imidazolium，[MMIM] = 1-Methyl-3-methyl-imidazolium。
在空氣下，反應溫度 120 ℃，反應時間 3 小時，進行 2-酚氧化偶合反應，並添加負載型離子液體催化劑，在 Fe3+ 反應中心作用之下，可順利生成1,1'-聯-2-酚。
利用UV/Vis光譜、質譜、磁性來鑑定催化劑。嘗試不同反應參數，觀察反應轉換率，已可將轉換率提升到達99%。藉由圓二色光譜量測產物手性，則結果不甚理想。本反應中氧氣為最終氧化劑，以讓反應後的 Fe2+ 重新氧化成為 Fe3+ 反應中心，以維持良好的催化性能。此類催化劑可回收重複利用，經 7 次使用，活性並未大幅減少。

FeCl3 is a widely used oxidant. When FeCl3 is treated with imidazolium chloride ionic liquids, it forms imidazolium chloroferrate(III) ionic liquids [BPIM]FeCl4, [BMIM]FeCl4, and [MMIM]I/FeCl3 where [BPIM] = 1-butyl-3-phenylethyl-imidazolium, [BMIM] = 1-butyl-3-methyl-imidazolium, and [MMIM] = 1-methyl-3-methyl-imidazolium. These ionic liquids were blended with supports by means of physical adsorption to form supported ionic liquid catalysts (SILC).
Under atmosphere pressure air and with temperature controlled at 120 ℃, the oxidative coupling reaction of 2-naphthol using above supported ionic liquid catalysts for 3 hours, afforded 1,1’-binaphthol quantitatively, taking advantage of the Fe3+ reaction center in SILC.
UV/Vis spectroscopy, mass spectrometry and magnetism measurement were used to characterize the catalysts. An optimization of various parameters was made to increase the rate and the conversion to 99% was achieved. Optical activity of products was measured by a CD spectrophotometer and unsatisfactory results were obtained. Oxygen was the ultimate oxidant in this reaction to convert Fe2+ back to Fe3+ so as to maintain the activity of the catalytic center. The SILC catalysts have been recovered and reused for seven cycles without loss of catalytic activity.

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