A new chiral poly(aryl ether ketone)(PAEK) containing 1,1′-bi-2-naphthyl moiety was synthesized. The chiral PAEK was characterized by IR, 1H NMR, GPC and DSC. The chiral behavior of the chiral PAEK was investigated by vibrational circular dichroism(VCD) preliminaryly, and we found it possesses the chiral feature. It would be attempted to be chiral stationary phase to realize chiral separation.
The spreading behavior of new type of chiral and achiral rigid cyclic oligomer on the water surface was investigated by measuring the surface pressure(π) area( A ) isotherms, with the aim of comparison of new type LB films of chiral and achiral rigid cyclic oligomers. Molecular resolution atomic force microscope images of the Langmuir Blodgett(LB) film was observed and the structure of their two dimensional crystals on the basal plane of mica was studied.
Every slight movement of human body, such as beat of heart, contract of muscles, thinking of brain, is associated with bioelectricity. In search for a neural conducting tissue engineering material which can {ideally} conduct bioelectrical signals in vivo, the block copolymer of polylactide(PLA) and aniline pentamera material which is electro-active, remarkably biocompatible and biodegradable, was designed and synthesized. The aniline pentamer is similar with polyaniline in electrical chemical properties, but more soluble than the latter. The copolymer is prepared by condensation polymerization between carboxyl-capped aniline pentamer and {dihydroxyl}-capped PLA, with N,N′-dicyclohexylcarbodiimide(DCC) as a condensing agent. The co-polymerization of aniline pentamer and PLA can not only reduce the toxicity of aniline pentamer, but also make the {material} easily to degrade and excrete from the body. These properties of the copolymer provide a favorable prospect in biomedical application in vivo. The synthesized material is investigated by FTIR, {}+1H NMR, UV, and cyclic voltammetric measurements.
