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  • Articles: DFG German National Licenses  (3)
  • Germanium cluster  (2)
  • Nonlinear optics  (1)
  • 1
    ISSN: 1432-2234
    Keywords: FSGO ; Semiconductor cluster ; Silicon cluster ; Germanium cluster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ab initio FSGO-pseudopotential studies are reported for the nine molecules M(LH3)4; M, L = C, Si, Ge. We report orbital energies, calculated geometries, bonding parameters, and predicted energies of reaction. Comparison with experimental data shows the results to be quite satisfactory. Comparison with the tetrahedral group IV solids affords some clues to the nature of the doped materials. The outstanding observation, from all parameters calculated, is the similarity of (Si, Ge) and their difference from carbon. Comments on possible stability of the compounds are ventured.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2234
    Keywords: FSGO ; Semiconductor cluster ; Silicon cluster ; Germanium cluster
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ab initio FSGO-pseudopotential studies are reported for the nine molecules M(LH3)4; M, L = C, Si, Ge. We report orbital energies, calculated geometries, bonding parameters, and predicted energies of reaction. Comparison with experimental data shows the results to be quite satisfactory. Comparison with the tetrahedral group IV solids affords some clues to the nature of the doped materials. The outstanding observation, from all parameters calculated, is the similarity of (Si, Ge) and their difference from carbon. Comments on possible stability of the compounds are ventured.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 34 (1995), S. 155-173 
    ISSN: 0570-0833
    Keywords: NLO materials ; nonlinear optics ; polymers ; self-assembly ; thin films ; Nonlinear optics ; Self-assembly ; Thin films ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The design, synthesis, characterization, and understanding of new molecular and macromolecular assemblies with large macroscopic optical nonlinearities represents an active field of research at the interface of modern chemistry, physics, and materials science. Challenges in this area of photonic materials typify an important theme in contemporary chemistry: to create new types of functional materials by the rational construction of supramolecular assemblies exhibiting preordained collective phenomena by virtue of “engineered” molecule-molecule interactions and spatial relationships. This review surveys several approaches to, and the microstructural and optical properties of, second-order nonlinear optical materials built from noncentrosymmetric assemblies of chromophores having large molecular hyperpolarizabilities. Such types of materials can efficiently double the frequency of incident light, exhibit other second-order nonlinear optical effects, and contribute to the knowledge base needed for new photonic device technologies. Systems described include chromophore macromolecule guesthost matrices, chromophore-functionalized glassy macromolecules, thermally crosslinked chromophore-macromolecule matrices, and intrinsically acentric self-assembled chromophoric superlattices.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
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