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Träfflista för sökning "WFRF:(Gromov Sergey P) srt2:(2002)"

Sökning: WFRF:(Gromov Sergey P) > (2002)

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1.
  • Gromov, Sergey P, et al. (författare)
  • Synthesis, Structure, Spectroscopic Studies, and Complexation of Novel Crown Ether Butadienyl Dyes
  • 2002
  • Ingår i: Helvetica Chimica Acta. ; 85:1, s. 60-81
  • Tidskriftsartikel (refereegranskat)abstract
    • Butadienyl dyes of the benzothiazole series with various fragments of benzocrown ethers 1a-c were synthesized for the first time. The structures and spectral properties of crown-containing butadienyl dyes and their complexes with alkali and alkaline-earth metal cations were studied by X-ray diffraction analysis and 1H-NMR, UV/VIS, and resonance Raman spectroscopy. To interpret the experimental results, quantum-chemical calculations were performed. In the case of Sr2+ and Ba2+ ions, the formation of strong sandwich complexes [M(1b)2]2+ of an unusual structure involving stacking interactions was established; the dye molecules are arranged one above another in the complex according to the head-to-head' pattern.
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2.
  • Ushakov, Evgeny N, et al. (författare)
  • Self-Organization of Highly Stable Electron Donor-Acceptor Complexes via Host-Guest Interactions
  • 2002
  • Ingår i: The Journal of Physical Chemistry A. - : American Chemical Society (ACS). - 1089-5639 .- 1520-5215. ; 106:10, s. 2020-3
  • Tidskriftsartikel (refereegranskat)abstract
    • Biscrown stilbene S forms complexes of 1:1 and 2:1 composition with bisammonium viologen salt V4+ in acetonitrile solution. Both of the complexes exhibit spectroscopic behavior typical of molecular electron donor-acceptor complexes. The 1:1 complex [S·V]4+ has a very high thermodynamic stability (log K = 9.08), which is due to simultaneous interaction of the two ammonium groups of V4+ with the two 18-crown-6-ether units of S. The 2:1 complex (log K = 12.28) [S·V·S]4+ likely has a sandwich-type layered structure in which the acceptor salt is located between two complexed molecules of the biscrown stilbene.
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