Synthesis and characterization of beta-cyclodextrin inclusion complex containing di(8-hydroxyquinoline) magnesium.
The beta-cyclodextrin (beta-CD) inclusion complex containing di(8-hydroxyquinoline)magnesium was prepared. The product was characterized by NMR, IR, differential thermal thermogravimetric analysis (DT-TGA), spectrofluorimetry, and elemental analysis, indicating the formation of inclusion complex in which the quinoline rings of the guest were encapsulated within the beta-CD cavities. The Job's method provided 2:1 stoichiometry for the inclusion complex between beta-CD and di(8-hydroxyquinoline)magnesium. The association constant calculated with the modified Benesi-Hildebrand equation at 25 degrees C was determined. And the mean association constant was 3577 (L/mol)2, R.S.D. was 2.58%. The thermal stability and solubility of di(8-hydroxyquinoline)magnesium were improved when forming inclusion complex.
He
Jiang
J
Department of Chemistry, Lanzhou University, Lanzhou 730000, PR China. hejiang@lzu.edu.cn
Deng
Li
L
Yang
Shanshan
S
D017616:Magnesium Compounds / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015125:Oxyquinoline / Q000737:chemistry*; D012995:Solubility; D013055:Spectrophotometry, Infrared; D013696:Temperature; D047392:beta-Cyclodextrins / Q000138:chemical synthesis* / Q000737:chemistry
D017616:Magnesium Compounds; D047392:beta-Cyclodextrins; D015125:Oxyquinoline