期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 1, 页码 921-928出版社
AMER CHEMICAL SOC
DOI: 10.1021/am507458k
关键词
aluminum sensing; fluorescence chemosensor; fluorescence turn-on; sensory polymer
资金
- Spanish Ministerio de Economia y Competitividad-Feder [MAT2011-22544]
- Consejeria de Educacion - Junta de Castilla y Leon [BU232U13]
Selective and sensitive solid sensory substrates for detecting Al(III) in pure water are reported. The material is a flexible polymer film that can be handled and exhibits gel behavior and membrane performance. The film features a chemically anchored salicylaldehyde benzoylhydrazone derivative as an aluminum ion fluorescence sensor. A novel procedure for measuring Al(III) at the ppb level using a single solution drop in 20 min was developed. In this procedure, a drop was allowed to enter the hydrophilic material for 15 min before a 5 min drying period. The process forced the Al(III) to interact with the sensory motifs within the membrane before measuring the fluorescence of the system. The limit of detection of Al(III) was 22 ppm. Furthermore, a water-soluble sensory polymer containing the same sensory motifs was developed with a limit of detection of Al(III) of 1.5 ppb, which was significantly lower than the Environmental Protection Agency recommendations for drinking water.
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