Induction of a Single-Handed Helical Conformation through Radical Polymerization of Optically Active Phenyl-2-pyridyl-o-tolylmethyl Methacrylate

1995 ◽  
Vol 28 (14) ◽  
pp. 5135-5138 ◽  
Author(s):  
Yoshio Okamoto ◽  
Mitsuhiro Nishikawa ◽  
Tamaki Nakano ◽  
Eiji Yashima ◽  
Koichi Hatada
Keyword(s):  
Radical Polymerization ◽  
Optically Active ◽  
Helical Conformation

scholarly journals Optically active polyacetylene: Synthesis and helical conformation of a poly(phenylacetylene) carryingL-alanyl-L-alanine pendants

2005 ◽  
Vol 43 (16) ◽  
pp. 3701-3706 ◽  
Author(s):  
Lo Ming Lai ◽  
Jacky W. Y. Lam ◽  
Kevin K. L. Cheuk ◽  
Hermans H. Y. Sung ◽  
Ian D. Williams ◽  
...  
Keyword(s):  
Optically Active ◽  
Helical Conformation

Synthesis and Helical Conformation of Novel Optically Active Liquid Crystalline Poly(p-phenylene)s Containing Cyanoterphenyl Mesogen as Pendant

2009 ◽  
Vol 42 (14) ◽  
pp. 5053-5061 ◽  
Author(s):  
Lie Chen ◽  
Yiwang Chen ◽  
Kai Yao ◽  
Weihua Zhou ◽  
Fan Li ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Optically Active ◽  
Helical Conformation ◽  
Active Liquid

Odd−Even Effect in Free Radical Polymerization of Optically Active 2,5-Bis[(4‘-alkoxycarbonyl)- phenyl]styrene

2008 ◽  
Vol 41 (5) ◽  
pp. 1594-1597 ◽  
Author(s):  
Junge Zhi ◽  
Zhiguo Zhu ◽  
Anhua Liu ◽  
Jiaxi Cui ◽  
Xinhua Wan ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Optically Active

Methacrylic polymers bearing side-chain permanent dipole azobenzene chromophores spaced from the main chain by chiral moieties, 3 a Synthesis and chiroptical properties of the homopolymer of (R)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine and of copolymers with the enantiomeric monomer (S)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine

e-Polymers ◽  
2003 ◽  
Vol 3 (1) ◽  
Author(s):  
Luigi Angiolini ◽  
Loris Giorgini ◽  
Elisabetta Salatelli
Keyword(s):  
Radical Polymerization ◽  
Optical Activity ◽  
Main Chain ◽  
Optically Active ◽  
Side Chain ◽  
Chiroptical Properties

Abstract The optically active photochromic homopolymer deriving from radical polymerization of the monomer (R)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)- pyrrolidine, containing a chiral group of one prevailing configuration interposed between the methacrylic moiety and the photochromic azoaromatic chromophore, has been synthesized and characterized. Copolymers with the enantiomeric monomer (S)-3-methacryloyloxy-1-(4’-nitro-4-azobenzene)pyrrolidine have also been prepared in order to evaluate the effect on the overall optical activity of side chain chiral groups of opposite configuration in various ratios. The spectroscopic and chiroptical properties in solution of the polymeric derivatives have been assessed.

Synthesis and Radical Polymerizations of N-Substituted Maleimide Bearing Two Olefinic Groups

2014 ◽  
Vol 1033-1034 ◽  
pp. 619-622
Author(s):  
Hua Jing Gao ◽  
Zhao Hui Jin
Keyword(s):  
Maleic Anhydride ◽  
Radical Polymerization ◽  
Allyl Alcohol ◽  
Optically Active ◽  
Optically Active Polymers ◽  
Allyl Ester ◽  
Radical Polymerizations ◽  
Alcohol Radical

A kind of N-substituted maleimide - having two olefinic bonds with different reactivities, (S)-N-Maleoyl-L-leucine allyl ester ((S)-ALMI), was synthesized from maleic anhydride, L-leucine and allyl alcohol. Radical polymerizations were carried out to obtain optically active polymers using 2,2′-azobisisobutyronitrile. Structures of the monomer and polymers obtained were investigated by NMR measurements. In radical polymerizations, the solvents strongly affect the radical polymerization behaviors of (S)-ALMI.

Optically active helical polyethers from chiral terminal epoxides with a diarylamino group

2014 ◽  
Vol 92 (12) ◽  
pp. 1169-1173
Author(s):  
Jin Zhang ◽  
Chun-Hui Zhao ◽  
Li-Wen Yang ◽  
Nian-Fa Yang
Keyword(s):  
Optically Active ◽  
Helical Conformation ◽  
Chiroptical Properties

Six optically active epoxy propanes with a diarylamino group at the 3-position carbon were synthesized and polymerized. Poly((S)-3-diphenylaminopropene oxide) ([Formula: see text] = –634°) was obtained from the polymerization of (S)-3-diphenylaminopropene oxide ([Formula: see text] = +75°). By investigating chiroptical properties of the obtained polyethers derived from optically active epoxy propanes, we found that if the diarylamino group were rigid enough, the obtained polyethers from chiral terminal epoxides with a diarylamino group could maintain a one-handed helical conformation in solution.

Liquid crystalline vinylcyclopropane derivatives bearing cholesteryl side groups: synthesis, characterization and polymerization

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Valentina Alupei ◽  
Helmut Ritter
Keyword(s):  
Phase Transition ◽  
Nmr Spectroscopy ◽  
Carboxylic Acid ◽  
Ir Spectroscopy ◽  
Radical Polymerization ◽  
Liquid Crystalline ◽  
Optically Active ◽  
H Nmr

AbstractNew optically active 1,1-disubstituted 2-vinylcyclopropanes ,3a, b were synthesized by esterification of the corresponding 1-ethoxycarbonyl-2-vinylcyclopropane- 1-carboxylic acid 2a,b with cholesterol and characterized by 1H NMR and IR spectroscopy. The liquid crystalline properties of the obtained monomers are reported. The effect of the structure of the 2-vinylcyclopropane monomers on the phase transition of the mesogen was investigated. Radical polymerization of the asymmetrically substituted monomers 3a,b in solution and in bulk resulted in liquidcrystalline polymers with 1,5-opened units, as evidenced by 1H NMR spectroscopy.

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