Study on the new fluorescence enhancement system of Zn-bis-(trimethylolaminomethane)-4-tert-butyl-disalicylicimine in the presence of beta-cyclodextrin and its analytical application

Tianlin Yang; Wenwu Qin; Weisheng Liu

doi:10.1016/j.talanta.2003.08.020

Study on the new fluorescence enhancement system of Zn-bis-(trimethylolaminomethane)-4-tert-butyl-disalicylicimine in the presence of beta-cyclodextrin and its analytical application

Talanta. 2004 Feb 27;62(3):451-6. doi: 10.1016/j.talanta.2003.08.020.

Authors

Tianlin Yang¹, Wenwu Qin, Weisheng Liu

Affiliation

¹ Department of Chemistry and National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, PR China; College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, PR China.

PMID: 18969317
DOI: 10.1016/j.talanta.2003.08.020

Abstract

A new bis-Schiff base ligand, bis-(trimethylolaminomethane)-4-tert-butyl-disalicylicimine (HL), was synthesized. The fluorescence intensity of HL-Zn(2+) complex was increased by about 8-fold upon addition of beta-cyclodextrin (beta-CD). The spectrofluorimetric determination of trace amounts of Zn(2+) based on the phenomenon was carried out. The excitation and emission wavelengths are 405 and 465nm, respectively. Under optimal conditions, the fluorescence intensities vary linearly with the concentration of Zn(2+) in the range 0-317 mugl(-1) with a detection limit of 1.0mugl(-1). The interferences of some inorganic ions were described. The method is a selective, sensitive, rapid, and simple analytical procedure for the determination of Zn(2+) in crops. The mechanism for the fluorescence enhancement was also discussed.