Toward photopatternable thin film optical sensors utilizing reactive polyphenylacetylenes.
Substituted polyphenylacetylenes featuring reactive pentafluorophenyl (PFP) ester moieties are synthesized. Parts of the reactive PFP groups are then converted with a mono ortho-nitrobenzyl-protected diamine in variable ratios. Thin films are prepared from these copolymers and irradiated with UV light (λ = 365 nm), resulting in crosslinking of the irradiated areas and hence enabling a photopatterning. We found that during the photocrosslinking process, the excess of PFP ester moieties is stable and remained intact, enabling a subsequent post-polymerization modification step with amines. Noteworthy, this subsequent modification with amines results in a dramatically shift in the UV-vis absorption spectra, rendering these patterned conjugated polymer films ideal candidates for optical sensors.
Institute of Technical and Macromolecular Chemistry, University of Hamburg, Bundesstraße 45, D-20146 Hamburg, Germany.
Anja C
AC
Pauly
Patrick
P
Theato
D000480:Alkynes / Q000737:chemistry*; D000588:Amines / Q000737:chemistry; D004952:Esters; D055096:Optical Devices; D055668:Photochemical Processes; D011108:Polymers / Q000138:chemical synthesis*; D017550:Spectroscopy, Fourier Transform Infrared; D014466:Ultraviolet Rays
D000480:Alkynes; D000588:Amines; D004952:Esters; D011108:Polymers