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Volumn 63, Issue 37, 2007, Pages 9163-9171

Host-guest interactions involving cyclodextrins: useful complementary insights achieved by polarimetry

Author keywords

[No Author keywords available]

Indexed keywords

CYCLODEXTRIN; DRUG ADDITIVE;

EID: 34547569028     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2007.06.065     Document Type: Article
Times cited : (29)

References (81)
  • 1
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    • and references therein
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    • Szejtli, J.1
  • 3
    • 0003461218 scopus 로고    scopus 로고
    • Atwood J.L., Davies J.E.D., MacNicol D.D., and Vögtle F. (Eds), Pergamon, Oxford
    • Szejtli J., and Osa T. In: Atwood J.L., Davies J.E.D., MacNicol D.D., and Vögtle F. (Eds). Comprehensive Supramolecular Chemistry Vol. 3 (1996), Pergamon, Oxford
    • (1996) Comprehensive Supramolecular Chemistry , vol.3
    • Szejtli, J.1    Osa, T.2
  • 14
    • 34547602195 scopus 로고    scopus 로고
    • The amount of papers published on cyclodextrins is so enormous, and concerns so many research fields, that even reviews are virtually countless. Along with the other references reported within the present notes, for a few recent examples see also:
  • 15
    • 34547584661 scopus 로고    scopus 로고
    • See Ref. 1b;
  • 31
    • 4243778369 scopus 로고    scopus 로고
    • and references cited therein
    • Rekharsky M.V., and Inoue Y. Chem. Rev. 98 (1998) 1875-1917 and references cited therein
    • (1998) Chem. Rev. , vol.98 , pp. 1875-1917
    • Rekharsky, M.V.1    Inoue, Y.2
  • 38
    • 0035296992 scopus 로고    scopus 로고
    • and references therein
    • Liu L., and Guo Q.-X. Chem. Rev. 101 (2001) 673-695 and references therein
    • (2001) Chem. Rev. , vol.101 , pp. 673-695
    • Liu, L.1    Guo, Q.-X.2
  • 54
    • 0001076630 scopus 로고    scopus 로고
    • Szejtli J., and Osa T. (Eds), Pergamon, New York, NY
    • Connors K.A. In: Szejtli J., and Osa T. (Eds). Comprehensive Supramolecular Chemistry Vol. 3 (1996), Pergamon, New York, NY 205-240
    • (1996) Comprehensive Supramolecular Chemistry , vol.3 , pp. 205-240
    • Connors, K.A.1
  • 60
    • 34547590461 scopus 로고    scopus 로고
    • Actually, there are literature indications that the presence of methanol may significantly affect the binding constant for some large hydrophobic guests. (See for instance: Mrozek, J.; Guzov, K.; Szabelsky, M.; Karolkzac, J.; Wiczk, W. J. Photochem. Photobiol., A 2002, 153, 121-128; See also: Penn, S. G.; Bergström, E. T.; Goodall, D. M. Anal. Chem. 1994, 66, 2866-2873), whereas this effect seems more limited for more hydrophilic guests (See for instance: Szöko{combining double acute accent}, E.; Gyimesi, J.; Barcza, L.; Magyar, K. J. Chromatogr., A 1996, 754, 181-187). However, some numeric simulations showed us that even for variations in the binding constant up to 20% consequent to the amount of methanol progressively added, the systematic errors introduced on the best estimations for K and ΔΘ are below the limit of the statistic indeterminations inherent to the fitting data procedure. Anyway, the general satisfactory agreement between our data and previous literature reports (see Section 3) accounts for the overall reasonability of our assumptions. Moreover, we actually verified in a blank experiment that small amounts of methanol (up to 4% v/v) have no significant effect on the molar optical activity of the free β-CD.
  • 61
    • 34547562822 scopus 로고    scopus 로고
    • note
    • The value of the coefficient f for any solvent can be easily estimated on the basis of the density data reported for the proper water-solvent mixtures. For methanol f=0.938 (see Ref. 11).
  • 62
    • 34547555707 scopus 로고    scopus 로고
    • note
    • -1), defined as the optical rotation ideally expected for a sample at a 1 M concentration, under all other usual conditions. This choice agrees with an old suggestion by Rees (see Ref. 19) and simplifies the mathematical treatment, allowing a rational data analysis. To underline this different choice, we also adopted for consistency the symbol θ{symbol} to denote the observed optical rotations of the samples.
  • 69
    • 0004105856 scopus 로고
    • -)=-0.71; from, Longman Scientific and Technical Ed., UK
    • -)=-0.71; from. Isaacs N.S. Physical Organic Chemistry (1987), Longman Scientific and Technical Ed., UK
    • (1987) Physical Organic Chemistry
    • Isaacs, N.S.1
  • 78
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    • note
    • It is worth stressing just here that the polarimetric method is not precluded to chiral guests! Eq. 2 clearly provides the possibility that the guest possesses its own optical activity. So, we included substrates 14-R/-S namely to show that our methodology could be profitably applied in such cases too. In other words, the possible contribution to the optical activity of the measurement samples due to the guest can be kept into account upon data fitting, and consequently it does not affect the quality of the eventual results.
  • 79
    • 34547610090 scopus 로고    scopus 로고
    • note
    • By the way, at the best of our knowledge no hints in previous literature suggest the occurrence of complexes having a 'non-1:1' stoichiometry between β-CD and our guests, whereas 2:1 complexes have detected between α-CD and some p-nitroaniline derivatives at very high host concentration (see for instance Ref. 7d). Nevertheless, for all the cases examined in the present work, the fact that experimental data are very satisfactorily fitted by Eq. 2 or 3, reasonably allows per se to rule out the occurrence of any complex not having the presumed 1:1 stoichiometry.
  • 80
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    • See Ref. 6i;


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.