An air-stable μ-oxo-bridged binuclear Lewis acid of titanium(IV) salophen perfluorooctanesulfonate [{Ti(salophen)H₂O}₂O][OSO₂C₈F₁₇]₂ (1) was successfully synthesized by the reaction of Ti^IV(salophen)Cl₂ with AgOSO₂C₈F₁₇ and characterized by different techniques such as IR, NMR and HRMS. TG-DSC analysis showed that this complex was thermally stable at 220 °C. Meanwhile, it exhibited good solubility in polar organic solvents and good ionic dissociation in CH₃CN solution. Fluorescence spectra and Hammett indicator results indicated that the complex had relatively strong acidity. And it showed high catalytic efficiency for the synthesis of bis(indolyl) methane derivatives through Friedel-crafts reaction of aldehyde/ketone with indoles. Moreover, it can be reused five times with minimal changes in catalytic efficiency.

通过该反应成功合成了四氟钛氧萘酚全氟辛烷磺酸[{Ti（salophen）H ₂ O} ₂ O] [OSO ₂ C ₈ F ₁₇ ] ₂（1）的空气稳定的μ-氧代桥联双核路易斯酸。用AgOSO ₂ C ₈ F ₁₇制备Ti ^IV（盐基）Cl ₂，并通过不同的技术（例如IR，NMR和HRMS）进行表征。TG-DSC分析表明该络合物在220℃下是热稳定的。同时，它在极性有机溶剂中表现出良好的溶解性，并在CH _3中表现出良好的离子离解性CN解决方案。荧光光谱和哈米特指示剂结果表明该配合物具有相对强的酸性。通过醛/酮与吲哚的Friedel-crafts反应，对合成双（吲哚基）甲烷衍生物具有很高的催化效率。而且，在催化效率变化最小的情况下，它可以重复使用五次。