Delamination and re-assembly of surfactant-containing Li/Al layered double hydroxidesElectronic supplementary information (ESI) available: Diffraction patterns. See http://www.rsc.org/suppdata/jm/b3/b314288d/

Abstract

Exchange of the chloride anion intercalated in [LiAl₂(OH)₆]Cl.nH₂O with a range of surfactants is reported. Attempts to delaminate (or exfoliate) the surfactant-exchanged intercalates, where the surfactant was an alkyl sulfate, were unsuccessful. In contrast, delamination of the layered double hydroxides [LiAl₂(OH)₆][C₁₂H₂₅C₆H₄SO₃.nH₂O] and [LiAl₂(OH)₆][C₈H₁₇C₆H₄SO₃.nH₂O] was successful. The necessity of the alkyl chain of the surfactants was demonstrated by the failure of [LiAl₂(OH)₆][CH₃C₆H₄SO₃.nH₂O] to delaminate. The delamination of the unique Li/Al LDH is thus found to be dependent on the guest surfactant structure in terms of both chain length and head group moiety.