Factors Influencing Staging during Anion-Exchange Intercalation into [LiAl2(OH)6]X·mH2O (X = Cl-, Br-, NO3-)

摘要: A variety of organic carboxylates and phosphonates have been intercalated into the hexagonal rhombohedral polymorphs [LiAl2(OH)6]X·mH2O, with X = Cl- , Br-, NO3-. The two classes polytype differ in stacking sequence layers (aba abca, respectively). Both initial interlayer anion host are seen to a profound effect on whether anion-exchange intercalation reactions occur one-step direct transformation from first-stage product, or reaction proceeds via second-stage intermediate. Generally, staging is much more prevalent system, harder replace Br- anions. Overall, occurrence appears be strongly correlated rate exchange these materials.