PC 28

INCORPORATION OF FLUORESCENT AND AZO DYES INTO POLYSTYRENE-BLOCK-POLY(4-VINYLPYRIDINE) NANOTEMPLATES

R. Křenek^a, V. Cimrová^b, M. Stamm^a

^aDepartment of Nanostructured Materials, Leibniz Institute of Polymer Research, Hohe Str. 6, D-01069 Dresden, Germany (krenek@ipfdd.de)

^bInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, CZ-162 06 Praha 6, Czech Republic

The present study provides some basic concepts of functionalization of diblock copolymer (BC) nanotemplates for optical applications. It is focused on the polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) building component which is suitable for hydrogen bonding, undergoes phase segregation, and is well-accessible. Two techniques are described.

Direct functionalization consists in preparation of a complex solution of BC and a dye, and subsequent thin film deposition (Fig.1). A set of fluorescent dyes (derivatives of fluorescein, pyrene, and benzoxadiazole) and azo dyes (azobenzene, Disperse Red) was examined in order to elucidate relationship among the dye formula, thin film morphology, and optical response.		Fig 1.
Fig. 2	Post-functionalization requires development of porous BC nanotemplates and their UV crosslinking for an impregnation process. Impregnation was performed either via soaking or spin coating of Rhodamine 6G dye solution (Fig. 2). Various loading rates and fluorescent intensities were observed depending on solvent and thickness of the nanotemplate.

We acknowledge the support of the Grant Agency of the Academy of Sciences of the Czech Republic (grant No. IAA4050409), of the Ministry of Education, Youth and Sports of the Czech Republic (grant No.1M06031) and of the European Network of Excellence Nanofun-Poly.