Cj. Kepert et al., Hydrogen bond-directed hexagonal frameworks based on coordinated 1,3,5-benzenetricarboxylate, J SOL ST CH, 152(1), 2000, pp. 261-270
We report two phases containing the hexagonal (6,3) network of the graphene
sheet derived by tridentate coordination of 1,3,5-benzenetricarboxylate to
octahedral Ni-II centers. When the solvent used is 2-methyl-1-butanol, mat
er directs the coordination about Ni-II and ABCA'B'C' stacking of layers is
obtained. The use of l-butanol as solvent gives a different hydrogen-bondi
ng arrangement around Ni-II and produces AAA stacking of the layers. We hav
e previously demonstrated that the use of other alcohols such as methanol,
ethanol, 1,2-ethanediol, and 1,2-propanediol leads to the formation of 3-D
architectures. Here we show that a change in the hydrogen bonding around th
e metal center leads to 2-D structures which house substantial solvent-fill
ed microcavities, The comparatively weak interactions between layers, and t
he relative importance of framework-solvent interactions, facilitates slipp
age of the hexagonal sheets and interconversion between stacking type with
guest exchange. (C) 2000 Academic Press.