Abstract
A UV/visible spectrophotometric temperature-jump study of the inclusion of the rhodamine B zwitterion (RB) by β-cyclodextrin (βCD) to form a 1:1 complex (RB·βCD) in aqueous 1.00 mol dm−3 NaCl at pH 6.40 and 298.2 K yields:k 1=(1.3±0.2)×108 dm3 mol−1 s−1,k −1=(2.2±0.5)×104 s−1, andK 1=(5.9±2.3)×103 dm3 mol−1 for the equilibrium:
Under the same conditions the dimerization of RB:
is characterized byK d =(1.8±1.0)×103 dm3 mol−1. The interaction of RB with αCD and γCD is weaker than with βCD, and is discussed in terms of the relative sizes of RB and the cyclodextrin annulus. Comparisons are made with the inclusions of other dyes by cyclodextrins.
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References
W. Saenger:Angew. Chem., Int. Ed. Engl. 19, 344 (1980).
M. L. Bender and M. KomiyamaCyclodextrin Chemistry, Springer, Berlin (1978).
J. Szejtli:Cyclodextrins and Their Inclusion Complexes Akadémiai Kiado, Budapest (1982).
F. Cramer, W. Saenger, and H-Ch. Spatz:J. Am. Chem. Soc. 89, 14 (1967).
A. Hersey and B. H. Robinson:J. Chem. Soc., Faraday Trans. 1 80, 2039 (1984).
R. J. Clarke, J. H. Coates, and S. F. Lincoln:Carbohydrate Res. 127, 181 (1984).
R. L. Schiller, J. H. Coates and S. F. Lincoln:J. Chem. Soc., Faraday Trans. 1 80, 1257 (1984).
R. J. Clarke, J. H. Coates, and S. F. Lincoln:J. Chem. Soc., Faraday Trans. 1 80, 3119 (1984).
R. L. Schiller, S. F. Lincoln, and J. H. Coates:J. Chem. Soc., Faraday Trans. 1 82, 2123 (1986) In this paper all references to the cyclodextrin annular radius should be replaced by the cyclodextrin annular diameter.
R. W. Ramette and E. B. Sandell:J. Am. Chem. Soc. 78, 4872 (1956).
M. E. Gal, G. R. Kelly, and T. Kurucsev:J. Chem. Soc., Faraday Trans. 2,69, 395 (1973).
G. G. Hammes:Investigations of Rates and Mechanisms of Reactions, Part 2 (Techniques of Chemistry v. 6, Ed. G. G. Hammes), pp. 147–185. Wiley, New York (1974).
M. Kajtar, C. Horvath-Toro, E. Kuthi, and J. Szejtli:Acta Chim. Acad. Sci. Hung. 110, 327 (1982).
C. F. Bernasconi:Relaxation Kinetics, Academic Press, New York (1976).
G. H. Czerlinski:Chemical Relaxation, Marcel Dekker, New York (1966).
D. Thusius,J. Am. Chem. Soc. 94, 356 (1972).
K. Kemnitz, N. Tamai, I. Yamazaki, N. Nakashima, and K. Yoshihara:J. Phys. Chem. 90, 5094 (1986).
K. H. Drexhage:Structures and Properties of Dye Lasers (Topics in Applied Physics v. 1, Ed. F. P. Schafer), pp. 144–193. Springer, Berlin (1973).
R. L. Schiller, S. F. Lincoln, and J. H. Coates: submitted for publication.
Y. Degani, I. Willner, and Y. Haas:Chem. Phys. Lett. 104, 496 (1984).
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Lincoln, S.F., Coates, J.H. & Schiller, R.L. Inclusion of rhodamine B byβ-cyclodextrin. An equilibrium and kinetic spectrophotometric study. Journal of Inclusion Phenomena 5, 709–716 (1987). https://doi.org/10.1007/BF00656590
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DOI: https://doi.org/10.1007/BF00656590