Abstract. Heterogeneous 9-thiourea epiquinine catalysts are prepared by covalently anchoring 9-(3,5-is(trifluoromethyl) phenylthiourea)epiquinine on mesoporous silica surfaces via mercapto linker. It is found that 9-thiourea epiquinine moieties are located comparably on the interior and exterior surfaces of SBA-15 while preferentially on the exterior surface of MCM-41. The heterogeneous 9-thi…
Abstract. The intercalation of tartrate was performed through ion exchange using carbonate Mg–Al layered double hydroxide (LDH) as precursor. The intermediate crystalline phase (so-called second-staging phase) was observed during the intercalation process. The pure second-staging LDH, in which alternate interlayer regions are occupied by carbonate and tartrate anions, was obtained by the dei…