Rod−Coil and Coil−Rod−Coil Block Copolymers with Oligo(<i>p</i>-phenyleneethynylene) as the Rod Block

Kukula, Hildegard; Ziener, Ulrich; Schöps, M.; Godt, Adelheid

doi:10.1021/ma980443b

Cited by 59 publications

(33 citation statements)

References 18 publications

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“…For that reason, investigations on the liquid crystalline self-assembly behavior of aromatic rod-coils in the bulk state have been the subjects of much research. [47][48][49][50][51][52] In this Feature Article, however, we will focus mainly on the aqueous self-assembly behavior of aromatic rod-coils. Notably, selfassembly in aqueous solution has its advantages due to environmental friendliness and direct applicability as biomaterials.…”

Section: Rod-coil Molecules Based On Aromatic Rodsmentioning

confidence: 99%

Rod–coil block molecules: their aqueous self-assembly and biomaterials applications

2008

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Past decades have witnessed rapidly growing interest in nanometer-sized structures, which have great potential to be used in a variety of applications, such as electronics, sensors, coatings, and biomaterials. Supramolecular chemistry in particular has been actively applied to the development of such materials. Nanostructures can readily be accessed using bottom-up supramolecular approaches as they are composed of small molecules (supramolecular building blocks) requiring fewer steps to synthesize. Among various types of supramolecular building blocks, rod-coil molecules, due to their anisotropic molecular shape, are well-suited for tailoring nanostructural properties such as size and shape. This Feature Article highlights the self-assembly of rod-coil molecules in aqueous solution and introduces an emerging approach to the application of rod-coil nanostructures in biomaterials applications.

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Section: Rod-coil Molecules Based On Aromatic Rodsmentioning

confidence: 99%

Rod–coil block molecules: their aqueous self-assembly and biomaterials applications

2008

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“…Finally, the strong anisotropy of rod-like blocks introduces large conformational asymmetry effects in rod-coil block copolymers which can have a considerable impact on the perturb self-assembled morphologies compared to coil-coil block copolymers [19]. The steadily increasing number of experimental and theoretical studies devoted to rod-coil block copolymers, has been triggered by the considerable advances in the synthetic 380 The European Physical Journal E routes followed to control their synthesis [5,[20][21][22][23][24][25][26][27]. In the present study we have taken advantage of the progress made on synthetic strategies to design rod-coil block copolymers, to synthesize two homologue series of rodcoil block copolymers having, respectively, i) the same π-conjugated rod block, ii) different coil polymers of variable molecular weight.…”

Section: Introductionmentioning

confidence: 99%

Self-assembly of rod-coil block copolymers from weakly to moderately segregated regimes

Sary

Brochon²,

Hadziioannou³

et al. 2007

Eur. Phys. J. E

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Abstract. We report on the self-assembly behaviour of two homologue series of rod-coil block copolymers in which, the rod, a π-conjugated polymer, is maintained fixed in size and chemical structure, while the coil is allowed to vary both in molecular weight and chemical nature. This allows maintaining constant the liquid crystalline interactions, expressed by Maier-Saupe interactions, ω, while varying the tendency towards microphase separation, expressed by the product between the Flory-Huggins parameter and the total polymerization degree, χN . Therefore, the systems presented here allow testing directly some of the theoretical predictions for the self-assembly of rod-coil block copolymers in a weakly segregated regime. The two rod-coil block copolymer systems investigated were poly(DEH-p-phenylenevinylene-b-styrene), whose self-assembly takes place in the very weakly segregated regime, and poly(DEH-p-phenylenevinylene-b4vinylpyridine), for which the self-assembly behaviour occurs under increased tendency towards microphase separation, hereby referred to as moderately segregated regime. Experimental results for both systems are compared with predictions based on Landau expansion theories.PACS. 61.46.-w Nanoscale materials -61.30.Vx Polymer liquid crystals -64.60.Cn Order-disorder transformations; statistical mechanics of model systems

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“…Potential applications in electroluminescent devices 3) have recently stimulated significant research efforts directed towards the tailoring of the photoluminescence (PL) and electroluminescence (EL) characteristics of conjugated polymers 4) . Among the variety of conjugated polymers, different poly(p-phenylene ethynylene) (PPE) derivatives have attracted the attention of a number of research groups [5][6][7][8][9][10][11][12][13] , some of which have successfully employed PPEs for the preparation of EL devices 6, 13 d) and photoluminescent liquid crystal displays 13c) . Many of the PPE derivatives described in the past are characterized by a yellow-green PL or EL emission 5) .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and optical properties of novel poly(p-phenylene ethynylene)s

Dellsperger

Dötz

Smith

et al. 2000

Macromol. Chem. Phys.

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Rod−Coil and Coil−Rod−Coil Block Copolymers with Oligo(p-phenyleneethynylene) as the Rod Block

Cited by 59 publications

References 18 publications

Rod–coil block molecules: their aqueous self-assembly and biomaterials applications

Rod–coil block molecules: their aqueous self-assembly and biomaterials applications

Self-assembly of rod-coil block copolymers from weakly to moderately segregated regimes

Synthesis and optical properties of novel poly(p-phenylene ethynylene)s

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