title: Surface grafting of vinyl-functionalized poly(fluorene)s via thiol-ene click chemistry.
abstract: Thiol-ene chemistry is used for the surface grafting of vinyl-functionalized poly(fluorene) derivatives onto substrates containing free surface thiol groups. The grafting reaction proceeds in a matter of minutes under UV irradiation without photoinitiator, and the resulting surface-bound, solvent-impervious conjugated polymers retain their characteristic optoelectronic properties. End-chain grafted poly(fluorene)s reach greater surface densities than their side-chain grafted counterparts and show less blue-shifting of photoluminescence upon grafting, suggesting that chain end-grafted conjugated polymers experience less disruption of their extended conjugation and adopt a more brush-like surface conformation. Surface grafted poly(fluorene)s showed facile photopatterning, and thin film transistors with semiconducting polymers directly grafted to the dielectric layer showed performances directly comparable to conventional self-assembled layers of performance-improving alkylsilanes.
authors.affiliation: Department of Polymer Science and Engineering, University of Massachusetts Amherst , 120 Governors Dr., Amherst, Massachusetts 01003, United States.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: Davis
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Carter