title: Controlling chain conformation in conjugated polymers using defect inclusion strategies.
abstract: The Horner method was used to synthesize random copolymers of poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylene vinylene) (MEH-PPV) that incorporated different backbone-directing monomers. Single-molecule polarization absorption studies of these new polymers demonstrate that defects that preserve the linear backbone of PPV-type polymers assume the highly anisotropic configurations found in defect-free MEH-PPV. Rigid defects that are bent lower the anisotropy of the single chain, and saturated defects that provide rotational freedom for the chain backbone allow for a wide variety of possible configurations. Molecular dynamics simulations of model defect PPV oligomers in solution demonstrate that defect-free and linearly defected oligomers remain extended while the bent and saturated defects tend toward more folded, compact structures.
authors: Department of Chemistry and Biochemistry and the Center for Nano and Molecular Science and Technology, University of Texas, Austin, Texas 78712, USA.
authors: Giannis
authors: G
authors: Bounos
authors: Subhadip
authors: S
authors: Ghosh
authors: Albert K
authors: AK
authors: Lee
authors: Kyle N
authors: KN
authors: Plunkett
authors: Kateri H
authors: KH
authors: DuBay
authors: Joshua C
authors: JC
authors: Bolinger
authors: Rui
authors: R
authors: Zhang
authors: Richard A
authors: RA
authors: Friesner
authors: Colin
authors: C
authors: Nuckolls
authors: David R
authors: DR
authors: Reichman
authors: Paul F
authors: PF
authors: Barbara