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  • fluorescence spectroscopy  (2)
  • Springer  (2)
  • American Institute of Physics (AIP)
  • Oxford University Press
  • Wiley
  • 1990-1994  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Spectral characterization ofβ-Cyclodextrin : Triton X-100 complexes (1991)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 10 (1991), S. 471-484 
    Details
    ISSN: 1573-1111
    Keywords: β-cyclodextrin ; Triton X-100 ; cyclodextrin inclusion ; fluorescence spectroscopy ; nuclear magnetic resonance spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The spectral characteristics of the surfactant, Triton X-100, in the absence and presence ofβ-cyclodextrin have been examined. The fluorescence of Triton X-100 is concentration dependent and is markedly enhanced in the presence ofβ-cyclodextrin. Analysis of the variations in the excitation-emission profiles of the surfactant with concentration suggests excimer emission at concentrations above the critical micelle concentration (CMC). Nuclear magnetic resonance (NMR) spectroscopy suggests that the phenyl group is included inside the CD cavity while a portion of the ethylene oxide chain extends outside the cavity. Benesi-Hildebrand type equations were derived to determine the stoichiometry and to estimate the formation constant of the CD: Sf complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01061077
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  • 2
    Electronic Resource
    Electronic Resource
    Absorptiometric and spectrofluorimetric study of the inclusion complexes of 2-naphthyloxyacetic acid and 1-naphthylacetic acid with β-cyclodextrin in aqueous solution (1993)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 15 (1993), S. 131-143 
    Details
    ISSN: 1573-1111
    Keywords: β-Cyclodextrin ; 2-naphthyloxyacetic acid ; 1-naphthylacetic acid ; fluorescence spectroscopy ; molecular absorption spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The inclusion complexes of 2-naphthyloxyacetic acid (NOA) and 1-naphthylacetic acid (NAA) with β-cyclodextrin have been investigated in aqueous solution. It has been demonstrated that the naphthalene derivatives form 1:1 complexes when included in the cyclodextrin. A possible structure is proposed, having an axial inclusion of the naphthalene derivatives. In the case of the β-CD: NOA complex, the naphthyl moiety is included in the cyclodextrin and the acetic acid group protrudes from the cavity, while NAA is only partially included because of the steric effect of the group in position 1. Association constants of 560±100 M−1 and 100±50 M−1 have been calculated for the β-CD: NOA and β-CD: NAA complexes, making use of the increment in the fluorescene emission produced in the inclusion process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00710222
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