Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10601802 | Carbohydrate Polymers | 2013 | 7 Pages |
Abstract
The photophysical and photochemical characteristics of nano-scaled particles obtained via solvent displacement from coumarin-modified dextrans were studied by means of absorption- and fluorescence-spectroscopy. The environment-dependent fluorescence emission of the pendant 4-methyl-7-alkoxy coumarin groups was exploited as a probe to gain information about the inner structure of the polysaccharide based nanoparticles. Time-resolved fluorescence measurements showed that the particles had two domains of different polarity and it could be confirmed that the core of the nano-assemblies contained water. Moreover, preliminary experiments were carried out demonstrating the possibility to control the morphology of the nanoparticles by the light induced 2ÏÂ +Â 2Ï cycloaddition of the coumarin substituents.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Holger Wondraczek, Anne Kotiaho, Marja Niemi, Pedro Fardim, Thomas Heinze,