Anyone encountered with NH2 (in aminopropyl) functional groups show oxide nitrogen at 406.9 eV in XPS, when loaded on mesoporous silica surfaces?

Aminopropyl silane has been grafted through conventional method using dry boiling toluene. Material (powder) has been kept in closed cap containers. Could it be the source? though the aminosilane...

24 September 2014 5,277 3 View