Synthesis and Liquid Crystalline Behavior of Stereoregular Polyketones with Mesogenic Side Chains

Nozaki, Kyoko; Kawashima, Yuji; Oda, Takuro; Hiyama, Tamejiro; Kanie, Kiyoshi; Kato, Takashi

doi:10.1021/ma0113125

Cited by 23 publications

(9 citation statements)

References 25 publications

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“…At a certain temperature above the glass‐transition temperature, the molar ellipticity of a film drastically decreases, whereas the molar ellipticity in solution does not. Recently, we reported that a single enantiomer of a side‐chain liquid‐crystalline polyketone forms a chiral nematic phase, and this might be attributed to a helical structure of the main chain 49…”

Section: Structures and Physical Properties Of Chiral Polyketones Andmentioning

confidence: 99%

C‐reactive protein as a regulator of autoimmunity and inflammation

Clos

2003

Arthritis & Rheumatism

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Metal acetylacetonates are effective latent catalysts for epoxy/anhydride systems. A screen test on the catalytic behavior of metal acetylacetonate shows that this system offers a wide range of curing latency and material properties. It can be inferred that the curing behavior is closely related to the bonding strength of the metal ion to the ligand. Isothermal kinetic study on the catalytic behavior of metal chelates with first‐row transition metal ions is conducted and analyzed by using an autocatalytic model. It is found that the activation energy of the system containing the divalent metal chelates follows the Irving and Williams rule. The activation energies of the reaction obtained in the kinetic study are compared with the dissociation energies of the metal/ligand bond and the results are discussed. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1572–1579, 2002

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Section: Structures and Physical Properties Of Chiral Polyketones Andmentioning

confidence: 99%

C‐reactive protein as a regulator of autoimmunity and inflammation

Clos

2003

Arthritis & Rheumatism

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“…In particular, there are few studies on the relationship between the backbone tacticity and liquid crystallinity 6–12. We previously reported the thermal properties of side‐chain liquid‐crystalline polyketones 3 – 5 , which were synthesized by the Pd‐catalyzed alternating copolymerization of 4‐cyano‐4′‐(7‐octenyl‐1‐oxy)biphenyl ( 2 ) with carbon monoxide (CO; Scheme ) 13. A significant influence of the backbone structure was observed: the higher stereoregularity of the backbone increased the stability of the crystalline phase, and the liquid‐crystalline phase of isotactic polyketone 3 was endowed with chirality because of the chirotopic center in the backbone.…”

Section: Introductionmentioning

confidence: 99%

Ruthenium(II) Pyrazolyl–Pyridyl–Oxazolinyl Complex Catalysts for the Asymmetric Transfer Hydrogenation of Ketones

Zhao

2012

Chemistry A European J

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“…A larger population of spiroketal structures was reported for polyketones bearing fluorine atoms in the side chain [49,50,61]. A single enantiomer of a side-chain, liquid-crystalline polyketone forms a chiral nematic phase, and this might be attributed to a helical structure of the main chain [62]. In a solid amorphous state, a helical structure has been suggested below the glass-transition temperature for an optically active methylstyrene/1-decene/CO terpolymer [44].…”

Section: Conformational Studies On the Optically Active Polyketonesmentioning

confidence: 98%