TY - JOUR
T1 - Fluorescent ratioable recognition of Cu 2+ in water using a pyrene-attached macrocycle/γ-cyclodextrin complex
AU - Yang, Ronghua
AU - Zhang, Ying
AU - Li, Ke'An
AU - Liu, Feng
AU - Chan, Winghong
N1 - Funding Information:
The authors express their sincere thanks to the reviewers and the editor for their valuable comments so that the quality of the paper could be greatly improved. Financial supports from Faculty Research Grant of HKBU (FRG/01-02/II-41) and the China Postdoctoral Science Foundation are also gratefully acknowledgement.
PY - 2004/11/1
Y1 - 2004/11/1
N2 - A pyrene-functional fluoroionophore, 1 was used to construct a supramolecular 1/γ-CD complex for Cu 2+ recognition in water. In aqueous γ-CD solution, 1 exhibits pyrene monomer fluorescence emission at 378 nm and 397 nm, while in the presence of Cu 2+, it shows a pyrene excimer emission at 452 nm with a decrease in the monomer fluorescence due to the formation of a 1:2 metal-liganded complex. Based on the response characteristics of the supramolecular complex, a fluorescent ratiometric method was performed for the determination of Cu 2+ concentration in water. With the optimum conditions described, Cu 2+ in aqueous solution can be determined from 1.2 × 10 -6 to 4.5 × 10 -4 M. The Cu 2+ selectivity of the complex is excellent, and the excimer fluorescence enhancements are very smaller induced by other heavy metal and transition metal ions.
AB - A pyrene-functional fluoroionophore, 1 was used to construct a supramolecular 1/γ-CD complex for Cu 2+ recognition in water. In aqueous γ-CD solution, 1 exhibits pyrene monomer fluorescence emission at 378 nm and 397 nm, while in the presence of Cu 2+, it shows a pyrene excimer emission at 452 nm with a decrease in the monomer fluorescence due to the formation of a 1:2 metal-liganded complex. Based on the response characteristics of the supramolecular complex, a fluorescent ratiometric method was performed for the determination of Cu 2+ concentration in water. With the optimum conditions described, Cu 2+ in aqueous solution can be determined from 1.2 × 10 -6 to 4.5 × 10 -4 M. The Cu 2+ selectivity of the complex is excellent, and the excimer fluorescence enhancements are very smaller induced by other heavy metal and transition metal ions.
KW - Fluorescence
KW - Metal ion
KW - Molecular recognition
KW - Ratiometry
UR - http://www.scopus.com/inward/record.url?scp=5044237612&partnerID=8YFLogxK
U2 - 10.1016/j.aca.2004.08.033
DO - 10.1016/j.aca.2004.08.033
M3 - Journal article
AN - SCOPUS:5044237612
SN - 0003-2670
VL - 525
SP - 97
EP - 103
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
IS - 1
ER -