1-Phenyl-1H-pyrrole-2,5-dicarboxylic acid derivatives as versatile hydrogen-bonding motifs for the formation of one-, two- and three-dimensional networks in the solid state †
1-Phenyl-1H-pyrrole-2,5-dicarboxylic acid derivatives as versatile hydrogen-bonding motifs for the formation of one-, two- and three-dimensional networks in the solid state †
The finite‐element method (FEM) is used to study the influence of porosity and pore shape on the elastic properties of model porous ceramics. Young's modulus of each model is practically independent of the solid Poisson's ratio. At a sufficiently high porosity, Poisson's ratio of the porous models converges to a fixed value independent of the solid Poisson's ratio. Young's modulus of the models is in good agreement with experimental data. We provide simple formulas that can be used to predict the elastic properties of ceramics and allow the accurate interpretation of empirical property–porosity relations in terms of pore shape and structure.
作者:Breitenbach, Joerg、Hoss, Ralf、Nieger, Martin、Rissanen, Kari、Voegtle, Fritz
DOI:——
日期:——
1-Phenyl-1H-pyrrole-2,5-dicarboxylic acid derivatives as versatile hydrogen-bonding motifs for the formation of one-, two- and three-dimensional networks in the solid state †
作者:Qing Lin、Steven J. Geib、Andrew D. Hamilton
DOI:10.1039/a803966f
日期:——
A series of 1-phenyl-1H-pyrrole-2,5-dicarboxylic acid
derivatives were prepared and their solid state structures were
investigated. Small structural changes in the monomeric subunit can lead
to the formation of one-dimensional linear ribbons, two-dimensional
sheets and three-dimensional networks. In each case a consistent feature
of the solid state structures is the formation of bidentate hydrogen
bonded contacts between the 2,5-carboxylic acid groups on adjacent
pyrrole subunits. The exact nature of the crystal packing is strongly
influenced by the substitution on the phenyl ring.