The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents loc...The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents located in para, meta and ortho-position of the benzenoid ring involve a large range of delta-pi electron-donor-acceptor capability. Theoretical analysis shows that the optical property is affected by the steric and electronic characteristics of the substituents on the benzenoid ring, moreover, the third-order polarizability regularly varies with the polymerization degrees.展开更多
Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses...Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses Second Order hyperpolarizability varied with polymerization degrees .展开更多
文摘The semiempirical calculations were performed to discuss the effects of different substituents on the optical properties of a series of substituted benzonitriles and their corresponding oligomers. The substituents located in para, meta and ortho-position of the benzenoid ring involve a large range of delta-pi electron-donor-acceptor capability. Theoretical analysis shows that the optical property is affected by the steric and electronic characteristics of the substituents on the benzenoid ring, moreover, the third-order polarizability regularly varies with the polymerization degrees.
文摘Linear polybenzonitrile with carbon-nitrogen conjugated backbones was prepared by plasma polyemrization techniques The 'ultrafast Kerr effect of polymer in DMF solution was examined with femtosecond laser pulses Second Order hyperpolarizability varied with polymerization degrees .
