Title | Fluorescent Semiconducting Polymer Conjugates of Poly( N -isopropylacrylamide) for Thermal Precipitation Assays |
Publication Type | Journal Article |
Year of Publication | 2004 |
Authors | Kuroda, K, Swager, TM |
Journal | Macromolecules |
Volume | 37 |
Pagination | 716–724 |
Date Published | feb |
ISSN | 0024-9297 |
Keywords | dye labeled polyisopropylacrylamide polyphenyleneethynylene block copolymer thermal pptn, isopropylacrylamide polyphenyleneethynylene block fluorescent semiconducting copolymer synthesis |
Abstract | New thermally responsive fluorescent polymers conjugated with poly(N-isopropylacrylamide) (polyNIPA) were synthesized. A nonionic water-sol. poly(phenyleneethynylene) (PPE) was end-capped with a di-tert-butylnitroxide deriv., and subsequent nitroxide-mediated radical polymn. of NIPA afforded PPE-polyNIPA block copolymers. These copolymers phase-sep. from aq. solns. upon heating, and the resultant ppts. are efficiently collected by filtration. The fluorescent spectra of the ppts. indicate the absence of strong assocns. between the PPE $π$-systems. Furthermore, the fluorescent intensities of the collected solids have a linear correlation with the polymer concns. in the solns. of origin. When copolymers are thermally copptd. with dye-labeled (rhodamine B) polyNIPA materials, the dye is localized to the PPE segments, inducing fluorescent resonance energy transfer from the PPE segment (donor) to the dye (acceptor). [on SciFinder(R)] |
URL | http://pubs.acs.org/doi/abs/10.1021/ma035373%2B |
DOI | 10.1021/ma035373+ |