Reactions of Alkoxyl Derivatives of a Layered Perovskite with Alcohols: Substitution Reactions on the Interlayer Surface of a Layered Perovskite

Organic derivatives of a layered perovskite compound, HLaNb 2 O 7 · x H 2 O (HLN), with interlayer surfaces possessing n -alkoxyl groups ( n -decoxyl and n -propoxyl) have been allowed to react with various alcohols and a diol (ethylene glycol) to form new organic derivatives via substitution reactions. The reaction of an n -propoxyl derivative of HLN with n -decanol leads to the formation of n -decoxyl groups bound to the interlayer surface of the perovskite-like [LaNb 2 O 7 ] slab. In a similar fashion, the reaction of an n -decoxyl derivative of HLN with 2-propanol results in the formation of an isopropoxyl derivative. The reaction of the n -decoxyl derivative of HLN with tert -butyl alcohol also proceeds, though the reaction is not completed even after 14 days. After the reaction of the n -decoxyl derivative of HLN with ethylene glycol, only one of the two hydroxyl groups in ethylene glycol is reacted, and −OCH 2 CH 2 OH groups are present on the interlayer surface. Water is required for proceeding the substitution reaction between the n -propoxyl derivative of HLN and n -decanol, and the reaction mechanism involving hydrolysis of the alkoxyl groups on the interlayer surface and subsequent esterification is proposed.