title: Forced solid-state interactions for the selective "turn-on" fluorescence sensing of aluminum ions in water using a sensory polymer substrate.
abstract: 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.
authors.affiliation: Departamento de Química, Facultad de Ciencias, Universidad de Burgos , Plaza de Misael Bañuelos s/n, 09001 Burgos, Spain.
authors.forename: Saúl
authors.initials: S
authors.lastname: Vallejos
authors.forename: Asunción
authors.initials: A
authors.lastname: Muñoz
authors.forename: Saturnino
authors.initials: S
authors.lastname: Ibeas
authors.forename: Felipe
authors.initials: F
authors.lastname: Serna
authors.forename: Félix Clemente
authors.initials: FC
authors.lastname: García
authors.forename: José Miguel
authors.initials: JM
authors.lastname: García
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D002412:Cations; D002845:Chromatography; D005456:Fluorescent Dyes / Q000737:chemistry*; D005609:Free Radicals; D006358:Hot Temperature; D006835:Hydrazones / Q000737:chemistry; D007477:Ions; D009682:Magnetic Resonance Spectroscopy; D008422:Materials Testing; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D012680:Sensitivity and Specificity; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013379:Substrate Specificity; D014867:Water / Q000737:chemistry
chemical_list: D002412:Cations; D005456:Fluorescent Dyes; D005609:Free Radicals; D006835:Hydrazones; D007477:Ions; D008567:Membranes, Artificial; D011108:Polymers; D012997:Solvents; D014867:Water; D000535:Aluminum
keywords: aluminum sensing; fluorescence chemosensor; fluorescence turn-on; sensory polymer