Optically active polymers present a specific rotation [α], which is related to the rotation angle, as equation 5 optical rotatory dispersion for polymers 89 table 1. The paperback of the optically active polymers: a systematic study on syntheses and properties by pradip k dutta, vinod kumar | at barnes & noble. The invention relates to optically active, pressurestable bead polymers containing fillers, and their use as adsorbents for the chromatographic resolution of enantiomeric mixtures (or racemates) into their enantiomers. The isotactic polymer can be produced from optically active propylene oxide, but at a high cost a salen cobalt catalyst was reported in 2005 to provide isotactic polymerization of the racemic propylene oxide [2.
In optically active vinyl polymers, where the stereogenic centers responsible for the non-vanishing optical rotation are in the side chains, the stereogenic centers in the main chain do not directly determine chirality, but rather determine stereoregularity and so can only affect the value of the optical rotation. Polymer-immobilized chiral catalysts and reagents have received considerable attention in regard to the organic synthesis of optically active compounds polymeric chiral catalyst design and chiral polymer synthesis. The optical activity originates from the presence of chiral elements in a polymer such as chiral centers or chiral axes due to long-range conformational order in a polymer (see also: helicity) source.
The optically active metallo-supramolecular polymers were successfully synthesized via complexation of fe(ii) ions with new bis-terpyridines containing chiral tetra-ethylene glycol units at the ortho-position of the peripheral pyridine rings. In this study, we examined novel synthetic methods for optically active polymers bearing various side chains from post-polymerization modification of a single optically active polymer the side chain in the optically active polymer (poly-1) which was synthesized by asymmetric polymerization is. Synthesis of optically active methacrylic oligomeric models and polymers bearing the side-chain azo-aromatic moiety and dependence of their chiroptical properties on the polymerization degree. University of massachusetts amherst [email protected] amherst doctoral dissertations 1896 - february 2014 dissertations and theses 1-1-1982 optically active polymers prepared from. Helix-sense selective polymerization of carbodiimides: building permanently optically active polymers from achiral monomers gonglu tian, yujie lu, and bruce m novak.
Optical activity is a physical spectral property of chiral matter caused by asymmetrical configurations, conformations and structures which have no plane and no center of symmetry and consequently. Chirality is important in context of ordered phases as well, for example the addition of a small amount of an optically active molecule to a nematic phase (a phase that has long range orientational order of molecules) transforms that phase to a chiral nematic phase (or cholesteric phase. Novel optically active methacrylic homopolymers bearing in the side chain one or more chiral groups of one single configuration (l-lactic acid residue) linked to tetraphenylporphyrin have been successfully synthesized and fully characterizedthese intrinsically chiral polymers exhibit remarkable thermal stability, with glass transition.
Get this from a library optically active polymers : a systematic study on syntheses and properties [p k dutta vinod kumar, (professor of chemistry). Supporting information one-pot synthesis of optically active polymer via concurrent cooperation of enzymatic resolution and living radical polymerization. Defects in electro-optically active polymer solids: author and affiliation: in crystalline polymers it would be valuable to establish a similar depth. Cianga luminita, petru poni institute of macromolecular chemistry iasi romania, polycondensation department, emeritus studies polymer chemistry, optically active polymers, and optically active.
Kinetics and thermal degradation study of optically active and thermally stable aromatic polyamides with flame-retardancy properties kinetic study, optically active polymers, microwave. Electro-optically active through the addition of a chromophore that is mixed with the polymer, is incorporated into the polymer backbone, or is grafted as a side chain electro-optic coefficients. Optically active polymers are related to problems of the charged and reactive polymers, since optical activity is an inherent property of both natural macromolecules as well as a great variety of polymers synthesized. Optically active materials are those which can easily rotate a beam of transmitted plane-polarized light into plane of polarization containing unequal amounts of corresponding enantiomers the origin of optical activity is made in the chiral elements of a polymer such as centres or axes of chiral.