Study of inclusion complex formation between tropaeolin OO and beta-cyclodextrin by spectrophotometry and Infrared spectroscopy.
The mechanism of the inclusion of tropaeolin OO (TPOO) and beta-cyclodextrin (beta-CD) has been studied by spectrophotometry. The inclusion depth of the guest molecule in the host molecule was demonstrated by infrared spectrometry. Effect of the pH, concentrations of beta-CD, solvents and ionic strength on the inclusion of TPOO and beta-CD were examined. The result showed that TPOO reacts with beta-CD to form a 1:1 host-guest complex with an apparent formation constant of 1.50 x 10(3) l mol(-1). The thermodynamic parameters of inclusion reaction, DeltaG degrees , DeltaH degrees and DeltaS degrees were obtained.
Wang
Huai You
HY
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, People's Republic of China. wanghuaiyou@sdnu.edu.cn
Han
Juan
J
Feng
Xia Guang
XG
Pang
Yan Ling
YL
D001391:Azo Compounds / Q000737:chemistry*; D003505:Cyclodextrins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D002479:Inclusion Bodies; D007700:Kinetics; D009994:Osmolar Concentration; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry; D013055:Spectrophotometry, Infrared
D001391:Azo Compounds; D003505:Cyclodextrins; D012997:Solvents; C005863:tropaeolin OO