Synthesis of a novel host molecule of cross-linking-polymeric-beta-cyclodextrin-o-vanillin furfuralhydrazone and spectrofluorimetric analysis of its identifying cadmium.
A novel host inclusion complex of cross-linking-polymeric-beta-cyclodextrin-o-vanillin furfuralhydrazone (beta-CDP-OVFH) was synthesized and characterized with IR and 1H NMR spectra to confirm its structure. The coordination reaction of the host reagent with Cd(2+) was studied and the optimum reacting conditions were observed carefully. A highly selective and sensitive spectrofluorimetric determination of trace amount of cadmium was proposed based on the reaction of Cd(2+) with beta-CDP-OVFH in ammonia water-ammonium acetate buffer medium of pH = 11.0. The molar ratio of beta-CDP-OVFH to Cd(2+) was 1:1. The maximum excitation and emission wavelengths were 393 and 494 nm, respectively. The linear range of this method was from 3.0 to 500 microg l(-1) with a detection limit of 0.80 microg l(-1). The effect of interferences in the determination of cadmium was investigated and the results showed that the host reagent had quite high capacity of identifying Cd(2+). The proposed method was successfully applied to the determination of trace amount of Cd(2+) in mussel and tea samples.
Tang
Bo
B
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China. tangb@sdnu.edu.cn
Zhang
Li
L
Zhang
Jie
J
Chen
Zhen-Zhen
ZZ
Wang
Yan
Y
D001547:Benzaldehydes / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry*; D005662:Furaldehyde / Q000737:chemistry*; D006835:Hydrazones / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D012997:Solvents; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013696:Temperature; D047392:beta-Cyclodextrins / Q000737:chemistry*
D001547:Benzaldehydes; D006835:Hydrazones; D012997:Solvents; D047392:beta-Cyclodextrins; D002104:Cadmium; C100058:vanillin; D005662:Furaldehyde