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✦   LIBER   ✦

Fluorescent Nanoparticles through Self-Assembly of Linear Ionenes and Pyrenetetrasulfonate

✍ Scribed by Ümit Hakan Yildiz; Kaloian Koynov; Franziska Gröhn

Book ID
102940504
Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
864 KB
Volume
210
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

We investigated the association of linear cationic model polyelectrolytes with oppositely charged pyrenetetrasulfonate in aqueous solution. Water soluble ionenes were prepared via Menschutkin reaction from 1‐4‐diazabicyclo[2.2.2]octane (DABCO) and dibromoalkenes. UVVis results revealed that PY molecules bind to ionenes in a cooperative process due to π–π interaction. Size and structure of the particles vary in dependence of inter‐charge distance on the ionene backbone. Stable spherical dye–ionene assemblies with radii between 50 and 200 nm have been obtained with one polyelectrolyte (PD4), while this was not possible with a different polyelectrolyte (PD6) or in either case at polyelectrolyte excess. It was possible to deposit the fluorescent polyelectrolyte–dye aggregates onto mica surfaces.

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