Journal
RSC ADVANCES
Volume 5, Issue 57, Pages 45703-45709Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra04300j
Keywords
-
Categories
Ask authors/readers for more resources
Recently, long n-alkyltrimethoxysilanes (H3C(CH2)(n)Si(OCH3)(3)) have proven to self-assemble into mesoscopically ordered passive lamellar films through an efficient solvent-free photoacid-catalysed solgel process. By using an analogue precursor architecture presenting a terminal ester group (H3COC(O)(CH2)(10)Si(OCH3)(3)), both functional and tuneable nanostructured organosilica films were synthesized, while keeping all the processing advantages of light-induced self-assembly. The subsequent attachment of a fluorescent amino-based ligand (Safranin O) was performed using a two-step procedure. The ester end groups were first hydrolysed in reactive carboxylic acid using standard methods, and activated with an amino ligand to form amide bonds. Hydrolysis and ligand coupling were assessed through infrared and solid-state H-1 NMR spectroscopy. Direct patterning of the fluorescent ligand-functionalized silsesquioxane film was performed by exposure to deep UV light under a mask to cause the local degradation of the dye. The resultant photopatterned film was detected using fluorescence microscopy. This UV method could represent an effective and general approach for attaching and patterning amino-based ligands, with less restriction on substrate and surface preparation than self- assembled monolayers.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available