Au. Moozyckine et al., Structure and stability of cyclodextrin inclusion complexes with the ferrocenium cation in aqueous solution: H-1 NMR studies, J CHEM S P2, (9), 2001, pp. 1858-1862
Citations number
39
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2
The interaction of the ferrocenium cation with cyclodextrins has been studi
ed in aqueous and D2O solutions by H-1 NMR spectroscopy. The 1:1 binding co
nstants of the beta- and gamma -cyclodextrin complexes are 15 +/-3 and 18 /-4 dm(3) mol(-1), respectively, whereas the binding of alpha -cyclodextrin
is very weak. Although the values for the beta- and gamma -cyclodextrin co
mplexes are very similar, the guest penetrates the cavity of the latter mor
e deeply than that of the former. The results are compared with literature
values of binding constants of ferrocene and substituted ferrocene and ferr
ocenium complexes of cyclodextrins in terms of the relative abilities of th
e different cyclodextrins to stabilise the Fe(II) oxidation state with resp
ect to Fe(III).