80214-62-6Relevant articles and documents
Analysis of Static and Dynamic Host-Guest Associations of Detergents with Cyclodextrins via Photoluminiscence Methods
Turro, Nicholas J.,Okubo, Tsuneo,Chung, Chao-Jen
, p. 1789 - 1794 (2007/10/02)
Host-guest inclusion type associations between β- and γ-cyclodextrins (CD) and a series of cationic phosphorescence detergent probes (i.e., trimethylammonium bromide, alkyl = methyl (n=1, BNK-1+), pentyl (n=5, BNK-5+), and decyl (n=10, BNK-10+)) are reported.No evidence for association could be detected for α-CD.The association equilibrium constant (K), the association rate constant (kf), and the dissociation rate constant (kb) were evaluated from dynamic phosphorescence decay method by using Co(NH3)63+ as an aqueous-phase phosphorescence quencher.The kf values are of the order of 107 M-1 s-1 and are independent of the detergent structure.However, the magnitudes of kb and K vary over several orders of magnitude as a function of detergent and host structure.The results are discussed in terms of the importance of dehydration of CD and/or probe as a rate-determining step of inclusion.