Showing papers by "Adelheid Godt published in 2002"
TL;DR: Under these conditions and in the absence of orientational selection, the dipolar time evolution data can be quantitatively simulated for arbitrary radial distribution functions by shell factorization, i.e., by performing the orientational average separately for thin spherical shells and multiplying the signals of all the shells.
224 citations
104 citations
TL;DR: In this article, the synthesis of luminescent rod−coil diblock and coil−rod-coil triblock copolymers containing oligo(p-phenyleneethynylene) as the rodlike block and polystyrene as the coil was achieved via atom transfer radical polymerization using oligosp-pphenyleneethylynylenes as the initiators substituted with 2-halogenopropionyloxy or 4-(bromomethyl)benzyloxy groups.
Abstract: The synthesis of luminescent rod−coil diblock and coil−rod−coil triblock copolymers containing oligo(p-phenyleneethynylene) as the rodlike block and polystyrene as the coil was achieved via atom transfer radical polymerization using oligo(p-phenyleneethynylene)s as the initiators substituted with 2-halogenopropionyloxy or 4-(bromomethyl)benzyloxy groups.
30 citations
TL;DR: The synthesis of monodisperse gigantocycles with 63, 87, and 147 ring atoms on the gram scale is described, which combine a rod-like and a banana-shaped mesogen connected by flexible chains within the backbone of a ring gives rise to nematic and smectic mesophases.
Abstract: The synthesis of monodisperse gigantocycles with 63, 87, and 147 ring atoms on the gram scale is described. These molecules were assembled from terphenylene derivatives and long, flexible chains which were mainly aliphatic, with terminal alkyne groups. The latter allowed for ring formation through oxidative alkyne dimerization in high yield (80-87%). The combination of a rod-like and a banana-shaped mesogen connected by flexible chains within the backbone of a ring gives rise to nematic and smectic mesophases.
19 citations
TL;DR: In this article, composites of pi-conjugated, rod-like dicarboxylic acids are reported, in which the metal ions are arranged in ribbons and are separated by the long axis of the organic molecules.
Abstract: Composite materials of quantum particles (Q-particles) arranged in layers within crystalline powders of pi-conjugated, rodlike dicarboxylic acids are reported. The synthesis of the composites, either as three-dimensional crystals or as thin films at the air-water interface, comprises a two-step process: 1) The preparation of the Cd salts 6 (Cd), 8 (Cd) or Pb salts 6 (Pb), 8 (Pb) of the oligo(p-phenyleneethynylene)dicarboxylic acids 6 (H), 8 (H), in which the metal ions are arranged in ribbons and are separated by the long axis of the organic molecules, as demonstrated by X-ray powder diffraction analysis of the solids and grazing incidence X-ray diffraction analysis of the films on water. 2) Topotactic solid/gas reaction of these salts with H(2)S to convert the metal ions into Q-particles of CdS or PbS embedded in the organic matrix that consists of the acids 6 (H) and 8 (H). These hybrid materials have been characterized by X-ray photoelectron spectroscopy and transmission electron microscopy.
16 citations
Journal Article•
TL;DR: In this article, composites of pi-conjugated, rod-like dicarboxylic acids are reported, in which the metal ions are arranged in ribbons and are separated by the long axis of the organic molecules.
Abstract: Composite materials of quantum particles (Q-particles) arranged in layers within crystalline powders of pi-conjugated, rodlike dicarboxylic acids are reported. The synthesis of the composites, either as three-dimensional crystals or as thin films at the air-water interface, comprises a two-step process: 1) The preparation of the Cd salts 6 (Cd), 8 (Cd) or Pb salts 6 (Pb), 8 (Pb) of the oligo(p-phenyleneethynylene)dicarboxylic acids 6 (H), 8 (H), in which the metal ions are arranged in ribbons and are separated by the long axis of the organic molecules, as demonstrated by X-ray powder diffraction analysis of the solids and grazing incidence X-ray diffraction analysis of the films on water. 2) Topotactic solid/gas reaction of these salts with H(2)S to convert the metal ions into Q-particles of CdS or PbS embedded in the organic matrix that consists of the acids 6 (H) and 8 (H). These hybrid materials have been characterized by X-ray photoelectron spectroscopy and transmission electron microscopy.
1 citations