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-phenyteneethynytene)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 H2S 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.
|Journal||Chemistry: A European Journal|
|Publication status||Published - 2002|
Hensel, V., Godt, A., Popovitz-Biro, R., Cohen, H., Jensen, T. R., Kjær, K., Weissbuch, I., Lifshitz, E., & Lahav, M. (2002). Hybrid composites of monodisperse pi-conjugated rodlike organic compounds and semiconductor quantum particles. Chemistry: A European Journal, 8(6), 1413-1423. https://doi.org/10.1002/1521-3765(20020315)8:6<1413::AID-CHEM1413>3.0.CO;2-6