Influence of branching on the chiral self‐assembly of poly(phenylene ethynylene)

Steverlynck, Joost; Leysen, Pieter; Koeckelberghs, Guy

doi:10.1002/pola.27443

Cited by 10 publications

(12 citation statements)

References 49 publications

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“…A wide range of conjugated branched, hyperbranched and even dendritic structures have been described in literature. [248][249][250][251] Most of these structures were prepared using non-controlled polymerization methods. However, some efforts have been made to prepare branched and hyperbranched conjugated polymers in a controlled fashion.…”

Section: Branched Polymersmentioning

confidence: 99%

Advances in the controlled polymerization of conjugated polymers

Verheyen

Leysen

Eede

et al. 2017

Polymer

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This article features recent advances in the synthesis of conjugated polymers via a controlled polymerization. These polymerizations typically rely on transition metal catalyzed cross coupling reactions. The mechanisms of the polymerization protocols are discussed in detail. An overview of all possible protocols and all homopolymers that have been investigated is given. Next, the synthesis of copolymers-random, gradient and block copolymers-is reviewed. Another advantage of a controlled polymerization is the possibility to introduce specific functional groups, either at the beginning of each polymer chain by the use of an external initiator, or at the end of the polymer chain using an endcapper. Finally, topologies different from simple linear polymer chains are discussed. This feature article is complementary to other recent review articles on this topic. 1,2

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Section: Branched Polymersmentioning

confidence: 99%

Advances in the controlled polymerization of conjugated polymers

Verheyen

Leysen

Eede

et al. 2017

Polymer

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“…[1][2][3][4][5][6][7][8] There are some reports of conjugated graft copolymers and only one about a conjugated star copolymer. [9][10][11][12][13] Whereas conjugated graft copolymers already represent a very interesting architecture, the topology can be made even more advanced by adding a linear non-grafted segment to the backbone in order to form toothbrush (co)polymers. In the field of non-conjugated polymers, the properties of these toothbrush copolymers are already exploited.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and energy transfer in original poly(3-alkylthiophene)-g-poly(fluorene) toothbrush copolymers

Steverlynck

Winter

Gerbaux

et al. 2017

Polymer

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Conjugated tootbrush copolymers are prepared by connecting end-capped poly(9,9'dioctylfluorene) (PF) side-chains (PF) to a poly(3-alkylthiophene) (P3AT) backbone via the CuAAC reaction. The ratio of grafted/nongrafted segment is varied. The influence of the covalent attachment of sidechains to the backbone on the self-assembly is studied by UV-vis spectroscopy. By excitation of the PF side-chains energy transfer to the P3HT backbone is studied.

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“…Supramolecular helical structures are induced inside the polymer lattice by chiral alkoxy side group on polymer backbone, or by the “sergeant‐and‐soldiers” co‐assembly method, where the chiral moieties (sergeant) decide the overall chirality of the polymer conformation mediated through nonchiral (soldiers) moieties. Other approaches were used to enhance the overall chirality of poly(phenylene ethynylene)s via structural modifications, including polymerization through meta‐positions of benzene rings, or introduction of branching on polymer backbone . It has been demonstrated that poly( m ‐phenylene ethynylene)s or oligo( m ‐phenylene ethynylene)s thermodynamically fold into helical conformation due to structural rigidity, and solvophobic effects .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and structure-property investigation of conformationally rigid regioisomers of poly(p-phenylene ethynylene)s

Sen

Valiyaveettil

2016

J. Polym. Sci. Part A: Polym. Chem.

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A series of rigid poly(p‐phenylene ethynylene)s (PPE1–PPE4) with biphenyl‐ (M1–M3) and phenyl‐ (M4) side groups is prepared from appropriately functionalized monomers. Herein, the solution and solid state absorption studies show the polymers have adopted twisted and rigid conformations, as supported by deep HOMO energy levels (−5.76 to −5.81 eV). The absorption maxima of PPE1–PPE3 are shifted to shorter wavelength (λmax = 375–381 nm) as compared to linear poly(p‐phenylene ethynylene)s (446 nm), implying a nonplanar conformation. The self‐assembly of polymers into fibers is examined using scanning electron microscopy. The fibers are not observed in PPE4 with short phenyl side group, suggesting the important role of the interplay between rigidity, position, and size of the side chains toward the formation of fibers. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 3652–3662

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Influence of branching on the chiral self‐assembly of poly(phenylene ethynylene)

Cited by 10 publications

References 49 publications

Advances in the controlled polymerization of conjugated polymers

Advances in the controlled polymerization of conjugated polymers

Synthesis and energy transfer in original poly(3-alkylthiophene)-g-poly(fluorene) toothbrush copolymers

Synthesis, characterization, and structure-property investigation of conformationally rigid regioisomers of poly(p-phenylene ethynylene)s

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