A new luminol derivative as a fluorescent probe for trace analysis of copper(II)

A new luminol derivative has been synthesized and its fluorescence has been studied. The luminol derivative emits at 460 nm in pH 10.0 phosphate buffer which is different from the original luminol that emits at 425 nm under the same conditions. Cu 2+ exhibits strong fluorescence quenching effect on...

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Bibliographic Details
Published in:Mikrochimica acta (1966) 2009-03, Vol.164 (3-4), p.411-417
Main Authors: Luo, Yun, Li, Yi, Lv, Baoqiang, Zhou, Zaide, Xiao, Dan, Choi, Martin M. F.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Exact sciences and technology
Microengineering
Nanochemistry
Nanotechnology
Original Paper
Spectrometric and optical methods
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Summary:A new luminol derivative has been synthesized and its fluorescence has been studied. The luminol derivative emits at 460 nm in pH 10.0 phosphate buffer which is different from the original luminol that emits at 425 nm under the same conditions. Cu 2+ exhibits strong fluorescence quenching effect on the luminol derivative and the quenching mechanism is discussed in detail. This luminol derivative can be applied as a fluorescent probe for ultra-trace analysis of Cu 2+ . The effects of pH, interferents and the stability have also been investigated. The fluorescent probe shows good reproducibility, and the relative standard deviation of response to Cu 2+ is 0.7% ( n  = 6). The lower linear range and the limit of detection are 0–500 and 0.27 nmol L −1 , respectively.
ISSN:0026-3672
1436-5073
DOI:10.1007/s00604-008-0076-4