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Chromogenic Discrimination of Primary Aliphatic Amines in Water with Functionalized Mesoporous Silica


  • We thank the Ministerio de Ciencia y Tecnología (MAT2003-08568-C03, REN2002-04237-C02-01), Generalitat Valenciana (GRUPOS03/035 and GRUPOS03/099), and Universidad Politécnica de Valencia (UPV) (PPI-06-03) for support. LAV and FS also thank the Ministerio de Ciencia y Tecnología for a Ramón y Cajal contract. We also thank the Servicio de Microscopía of the UPV for SEM analysis. MC thanks the Consellería de Educación y Ciencia for her grant. Supporting Information is available online from Wiley InterScience or from the author.


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Tuning of the sensing abilities of certain chromogenic molecules is achieved by anchoring them to modified MCM-41-type solids. This approach allows chromogenic detection of primary aliphatic amines of a certain length in water. The Figure shows color changes of the functionalized solid (magenta–yellow) in the presence of n-heptylamine, n-octylamine, and n-nonylamine. Longer or shorter aliphatic chains induced no significant color variation.

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