Jump to main content
Jump to site search

Issue 12, 2001
Previous Article Next Article

Preferential anion exchange intercalation of pyridinecarboxylate and toluate isomers in the layered double hydroxide [LiAl2(OH)6]Cl·H2O

Author affiliations

Abstract

All isomers of both pyridinecarboxylate (2-PA; 3-PA and 4-PA) and toluate (o-TA; m-TA and p-TA) can be intercalated into the layered double hydroxide [LiAl2(OH)6]Cl·H2O in water or a water–ethanol mixture at RT to give the fully ion-exchanged first stage intercalation compounds [LiAl2(OH)6]·G·yH2O (G = 2-PA; 3-PA; 4-PA; o-TA; m-TA and p-TA; y = 2.5–3.5). Experiments also showed that using a mixed ethanolwater solvent may improve the crystallinity and decrease the production of Al(OH)3. The observed interlayer separations for the intercalates vary from 14.9 Å for [LiAl2(OH)6](4-PA)·3H2O to 16.7 Å for [LiAl2(OH)6](p-TA)·2.5H2O. When [LiAl2(OH)6]Cl·H2O is added to a solution containing an equal concentration of two or three isomers of either pyridinecarboxylate or toluate anions, the host exhibits preferential anion-exchange intercalation. Following a series of competitive intercalation reactions involving two or three component mixtures we were able to determine the preference order for intercalation of both PA and TA guests in [LiAl2(OH)6]Cl·H2O. The order was found to be 4-PA > 2-PA > 3-PA and p-TA > m-TA > o-TA in water at both 20 and 80 °C.

Graphical abstract: Preferential anion exchange intercalation of pyridinecarboxylate and toluate isomers in the layered double hydroxide [LiAl2(OH)6]Cl·H2O

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Mar 2001, accepted on 08 Aug 2001 and first published on 20 Sep 2001


Article type: Paper
DOI: 10.1039/B102754A
Citation: J. Mater. Chem., 2001,11, 3276-3280
  •   Request permissions

    Preferential anion exchange intercalation of pyridinecarboxylate and toluate isomers in the layered double hydroxide [LiAl2(OH)6]Cl·H2O

    L. Lei, R. P. Vijayan and D. O'Hare, J. Mater. Chem., 2001, 11, 3276
    DOI: 10.1039/B102754A

Search articles by author

Spotlight

Advertisements