Intercalation of Pyridine in Layered Titanates

摘要: The intercalation of pyridine has been examined for four types layered protonic titanates such as H2Ti3O7, H2Ti4O9·1.2H2O, H2Ti5O11·3H2O, and HxTi2-x/4□x/4O4·H2O (x ∼ 0.7, □:  vacancy). Upon the action gaseous, liquid or aqueous at ambient temperature, latter oxide peculiarly yielded a complex composition (C5H5N)0.3HxTi2-x/4□x/4O4·0.6H2O while other three materials did not. compound lost weight in two steps 40−120 120−320 °C, which were attributable to evaporation interlayer water pyridine, respectively. Vibrational spectra suggested that was taken up its protonated cationic form. Rietveld refinements demonstrated gave rise an incommensurate gliding neighboring host layers along axis (∼28% repeat unit) well expansion. ring is accommodated inclined way (∼64° with respect layer) having nitrogen lone pair orientated parallel layer...