Nikolai Tyutyulkov

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We present theoretical results for the magnetic properties of modeled two-dimensional (2-D) Langmuir-Blodgett films consisting of different types of stable organic π-monoradicals. Their energy spectra and magnetic characteristics are investigated using the many-body band theory of magnetism in π-electron approximation. The main factors which determine the(More)
F. Dietz*, K. Rommel-Möhle, A. Schleitzer, N. Tyutyulkov+ Fachbereich Chemie, Universität Leipzig, Talstraße 35, D-04103 Leipzig, Deutschland Z. Naturforsch. 48b, 11331 137 (1993); received February 19, 1993 Ninhydrin-Amino Acid Color Reaction, Ruhemann’s Purple, Cyclopentadienyl Cation, Chromophore, Antiaromaticity The long-wavelength absorption o f the(More)
Model clusters of surfactant prototypes with small number of water molecules are calculated at different levels of theory. All approaches used yield correct trends in the variation of the dipole moment upon tail elongation or polar headgroup variation. Models including one, two, or more water molecules are optimized. The most stable structures are those(More)
The photoswitching of the energy gap width of the isomeric forms of photoresponsive polymers with homonuclear photochromic diarylethene elementary units is investigated theoretically, taking into account the correlation correction. It is shown that a real switching of electrical conductivity (insulator , semiconductor or conductor) can not be realized with(More)
The present study is related to our theoretical in­ vestigations [1—3] of diamino derivatives of the antiaromatic cyclopentadienyl cation (CPC). The theoretical results were confirmed with the brilliant synthesis of 6-amino-l,4-dimethyl-5,7-diphenyll,2,3,4-tetrahydrocyclopentapyrazin-6-ylium-tetrafluoroborate, carried out by Gompper et al. [4] and of some(More)
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