AGGREGATION OF METHYLENE-BLUE ADSORBED ON STARBURST DENDRIMERS

The adsorption and aggregation of methylene blue (MB) on anionic starburst dendrimers (n.5 SBD) was studied by UV-vis and fluorescence spectroscopy. The aggregation of MB depends strongly on the generation of SBD. For SBDs of later generation the aggregation occurs more readily and the number of MB molecules involved in one aggregate is larger than for earlier generations. It is proposed that the MB molecules stack perpendicular to the surface of the SBDs and not as a pile parallel to the surface. UV-vis and fluorescence experiments give identical results.