Layered double hydroxides, obeying to the general formula [M(II)1?xM*(III)x(OH)2][An?]x/n·mH2O, constitute an exceptionally diverse family of 2D compounds. That chemical diversity lies in the vast nature of the constituent cations M(II) and M*(III), ranging from Mg(II) to trivalent Rare Earths, that the hydroxylated layers can host. In addition, the interlayer space can host intercalated anions, An?, ranging from simple halides to bulky carboxylic acids. In this seminar the fundamental aspects of the anionic exchange behaviour of these phases will be discussed with several examples. In addition, the current advances for the preparation of single crystalline phases of well-defined stoichiometry will be illustrated.
References:
-Oestreicher, V.; Jobbágy, M.; Regazzoni, A. E., Halide exchange on Mg(II)-AI(III) Layered Double Hydroxides: exploring affinities and electrostatic predictive models. Langmuir 2014, 30, (28), 8408-8415.
-Oestreicher, V.; Fábregas, I.; Jobbágy, M., One-pot epoxide-driven synthesis of M2Al(OH)6Cl.1.5H2O layered double hydroxides: Precipitation mechanism and relative stabilities. Journal of Physical Chemistry C 2014, 118, (51), 30274-30281.