Side-Chain-Functionalized Polyacetylenes, 1. Liquid Crystalline and Stereomutational Properties

Schenning, Albertus P. H. J.; Fransen, Michel; Meijer, E. W.

doi:10.1002/1521-3927(20020301)23:4<265::aid-marc265>3.0.co;2-5

Cited by 75 publications

(75 citation statements)

References 12 publications

(13 reference statements)

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“…[30][31][32][33][34][35][36][37][38][39][40][41][42][43] Although PA is the most conducting polymer, it is insoluble and infusible. This prevents us from explicitly evaluating its molecular weight and conjugation length and also processing it in solution, as in casting.…”

Section: Background Of Polyacetylene (Pa)mentioning

confidence: 99%

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

2009

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with expertise in functional conjugated polymers. His research interests have involved electrically conducting polymers and liquidcrystalline, luminescent, and photoresponsive conjugated polymers, with works focused on the synthesis of helical polyacetylene in the chiral nematic liquid-crystal field. He has also been engaged in development of liquid-crystalline aromatic conjugated polymers with linearly and circularly polarized optoelectronic properties. He graduated from the

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Section: Background Of Polyacetylene (Pa)mentioning

confidence: 99%

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

2009

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“…Synthesis of liquid crystalline polymers is of great interest owing to their self‐organizing characteristics, which give rise to enhanced processability and mechanical and thermal stabilities over conventional polymeric materials. Whereas mesomorphic polymers containing rod‐like mesogens have been extensively investigated;19–37 research in discotic liquid crystalline polymers has been less well explored because only a few discogens are available from which polymers can be derived. To date, the most widely prepared polymers are those with triphenylene moieties, which either utilize as main building blocks or side chains attached to the backbones of polysiloxanes and poly(meth)acrylates 38–48…”

Section: Introductionmentioning

confidence: 99%

Synthesis and liquid crystalline properties of poly(1‐alkyne)s carrying triphenylene discogens

Xing

Lam

Zhao

et al. 2008

J. Polym. Sci. A Polym. Chem.

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Triphenylene-containing 1-decynes with different alkyl chain lengths and their polymers are synthesized and the effects of the structural variables on their mesomorphic properties are investigated. The monomers [HCϵC(CH 2 ) 8 CO 2 C 18 H 6 (OC m H 2mþ1 ) 5 ; m ¼ 4-9] are prepared by consecutive etherization, coupling, and esterification reactions. The monomers form columnar phases at room temperature. The polymerizations of the monomers are effected by [Rh(nbd)Cl] 2 , producing soluble polymers in high yields (up to 84%). The structures and properties of the polymers are characterized and evaluated by IR, NMR, TGA, DSC, POM, and XRD analyses. All the polymers are thermally stable, losing little of their weights when heated to 300 8C. The isotropization temperature of the polymers increases initially with the length of alkyl chain but decreases on further extension. Although the polymers with shorter and longer alkyl chain lengths adopt a homogeneous hexagonal columnar structure, those with intermediate ones form mesophases with mixed structures.

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“…Its intractability and instability, however, have greatly reduced its potential applications as a functional material 2. The attachment of suitable substituents to the polymer backbone not only has helped to solve the problems but also has generated substituted polyacetylenes with novel properties such as liquid crystallinity, photo‐ and electroluminescence, optical activity (chirality), photoconductivity, and gas permeability 3–22…”

Section: Introductionmentioning

confidence: 99%

Optical‐limiting and nonlinear optical polyacetylenes: Synthesis of azobenzene‐containing poly(1‐alkyne)s with different spacer and tail lengths

Yin

et al. 2006

J. Polym. Sci. A Polym. Chem.

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Poly(1‐alkyne)s containing azobenzene pendant groups with different lengths of the spacer and terminal alkyloxy group {[HCC(CH2)mOCOC6H4NNC6H4OCpH2p+1]n, where m = 1, 2, 3, or 9 and p = 4, 7, or 12} were synthesized in satisfactory yields with the [Rh(nbd)Cl]2–Et3N catalyst. All the polymers were soluble in common organic solvents such as CHCl3 and tetrahydrofuran. Their structures and properties were characterized and evaluated with IR, NMR, thermogravimetric analysis, UV, and optical‐limiting and nonlinear optical analyses. All the polymers were thermally stable and decomposed at temperatures as high as ∼300 °C. The optical‐limiting and nonlinear optical properties of the polymers were sensitive to their molecular structures. Polymers having shorter spacer lengths and longer terminal groups showed better performances and larger third‐order nonlinear optical susceptibility (up to 1.34 × 10−10 esu). © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 2346–2357, 2006

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Side-Chain-Functionalized Polyacetylenes, 1. Liquid Crystalline and Stereomutational Properties

Cited by 75 publications

References 12 publications

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

Helical Polyacetylene: Asymmetric Polymerization in a Chiral Liquid-Crystal Field

Synthesis and liquid crystalline properties of poly(1‐alkyne)s carrying triphenylene discogens

Optical‐limiting and nonlinear optical polyacetylenes: Synthesis of azobenzene‐containing poly(1‐alkyne)s with different spacer and tail lengths

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