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  • Atomic, Molecular and Optical Physics  (3)
  • ab initio  (1)
  • 1
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 66 (1998), S. 69-89 
    ISSN: 0020-7608
    Schlagwort(e): ab initio ; Hartree-Fock ; crystal orbital ; charge-transfer complexes ; CRYSTAL 92 Routine Package ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Ab initio Hartree-Fock crystal-orbital calculations of dimorph tetramethyltetraselenafulvalene-tetracyanoquinodimethane (TMTSF-TCNQ) and dibenzotetrathiafulvalene-tetracyanoquinodimethane (DBTTF-TCNQ), both as red and black crystals, were carried out. The crystal structures of the red and black TMTSF-TCNQ are essentially different from each other, whereas the red and black DBTTF-TCNQ are qualitatively very similar (although not completely isomorphous). The results of the present calculations definitely show that even subtle differences in the crystal structures are crucial for the electronic properties of the systems under study.   © 1998 John Wiley & Sons, Inc. Int J Quant Chem 66: 69-89, 1998
    Zusätzliches Material: 16 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 56 (1995), S. 145-153 
    ISSN: 0020-7608
    Schlagwort(e): Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Ab Initio crystal orbital calculations on three-dimensional crystals/crystallohydrates of a number of diprotonated mononucleotides have been performed using the CRYSTAL92 routine package. The present results help to gain a deeper insight into the physical mechanisms of nucleic acid semiconductivity, as well as into the essence of intermolecular interactions and solvent effects in solid-state samples of nucleic acids. © 1995 John Wiley & Sons, Inc.
    Zusätzliches Material: 10 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 58 (1996), S. 497-515 
    ISSN: 0020-7608
    Schlagwort(e): Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Crystal-orbital calculations on the three-dimensional disodium deoxyguanosine-5′-monophosphate tetrahydrate, disodium uridine-3′-monophosphate tetrahydrate, monosodium monoprotonated deoxyadenosine-5′ monophosphate hexahydrate, and disodium deoxycytidine-5′ -monophosphate heptahydrate crystallohydrates were carried out in a Hartree-Fock all-valence-electron approximation using the CRYSTAL92 routine package. The first, the second, and the last compounds were found to be insulators, whereas the third one should be considered a two-dimensional semiconductor. The structural basis for these findings is discussed, with special reference to the semiconductivity and intermolecular interactions in solid-state samples of polymeric nucleic acids. © 1996 John Wiley & Sons, Inc.
    Zusätzliches Material: 11 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 57 (1996), S. 851-860 
    ISSN: 0020-7608
    Schlagwort(e): Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Ab initio crystal orbital calculations on three-dimensional crystals of tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ), diprotonated deoxycytidine-5′-monophosphate monohydrate (5′-dCMP*2H*1Water), disodium deoxyguanosine-5′-monophosphate tetrahydrate (5′-dGMP*2Na*4Water), disodium uridine-3′-monophosphate tetrahydrate (3′-UMP*2Na*4Water), monosodium monoprotonated deoxyadenosine-5′-monophosphate hexahydrate (5′-dAMP*1H*1Na*6Water), disodium deoxycytidine-5′-monophosphate heptahydrate (5′-dCMP*2Na*7Water), cis-polyacetylene (cis-PA), and polythiophene (PTP) were carried out using the CRYSTAL92 routine package. A suitable basis set has been found that enables one to carry out the above calculations at the STO-3G level of accuracy using SILICON GRAPHICS workstations. However, to obtain reasonable results for three-dimensional crystals of polymers, one has to use much more extended basis sets. © 1996 John Wiley & Sons, Inc.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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