Two new functional polyacetylenes bearing different azobenzene group, -{ HC=C[azo-N （CH3）CH2CH2OH] } n-, [poly（EHAB）; azo = 4,4＇-azobenzene] and - { HC=C[azo-N（CH3）CH2CH2O COC3H7]},-, [poly（EEAB）]} were prepa...Two new functional polyacetylenes bearing different azobenzene group, -{ HC=C[azo-N （CH3）CH2CH2OH] } n-, [poly（EHAB）; azo = 4,4＇-azobenzene] and - { HC=C[azo-N（CH3）CH2CH2O COC3H7]},-, [poly（EEAB）]} were prepared by [Rh（nbd）Cl]2-Et3N catalysts. Poly（EHAB） has poor solubility while poly（EEAB） can be dissolved in common solvent. The polymers were characterized by FHR, ^1H NMR, UV and GPC. The nonlinear optical property of the soluble poly（EEAB） was investigated with 8 ns width pulse at 532 nm by Z-scan technique. The results show that poly（EEAB） is endowed with the larger third-order nonlinear optical property.展开更多
Two novel polyacetylenes bearing nonlinear optical chromophoric group poly（3-（4-[4-（n-butyloxy） phenylazophenyl]carbonyl）oxy-1-propyne） （poly（1a）） and poly（3-（4-[4-（n-heptyloxy）phenylazophenyl]carbonyl）...Two novel polyacetylenes bearing nonlinear optical chromophoric group poly（3-（4-[4-（n-butyloxy） phenylazophenyl]carbonyl）oxy-1-propyne） （poly（1a）） and poly（3-（4-[4-（n-heptyloxy）phenylazophenyl]carbonyl）-oxy-l- propyne） （poly（lb）） were synthesized with [Rh（nbd）Cl]2-EtaN as catalysts. These polyacetylenes are soluble by using an alkyl spacer and an alkyloxyl group as a substituent. They were characterized by FTIR, NMR, GPC and UV-Vis and their optical limiting and nonlinear optical properties were investigated using 8 ns pulse at 532 nm wavenumber. The results show that these soluble functional polyacetylenes possess optical limiting properties and large nonlinear optical properties and poly（1b） possesses better optical limiting and nonlinear optical properties than poly（ 1 a）.展开更多
A novel functional polyacetylene containing fluorene group as a pendant,poly（2-（p-methylstyrene）-7-acetylene-9,9-dioctyl-fluorene）, was synthesized in moderate yield by[Rh（nbd）Cl]_2-Et_3N catalyst.The structures...A novel functional polyacetylene containing fluorene group as a pendant,poly（2-（p-methylstyrene）-7-acetylene-9,9-dioctyl-fluorene）, was synthesized in moderate yield by[Rh（nbd）Cl]_2-Et_3N catalyst.The structures and properties of monomer and polymer were characterized and evaluated with FTIR,NMR,UV-vis,GPC and Z-scan,respectively.The results show that the incorporation of fluorene into polyacetylene has endowed the resultant polymer with well optical limiting properties for laser at wavelength 780 nm based on two-photon absorption mechanism.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.50073001 and 90206014)Program for New Century Excellent Talents in University(NCET-04-0588)+1 种基金the Outstanding Youth Fund of Anhui Province(Grant No.04044060)the Award for High Level Intellectuals(Grant No.2004Z027)from Anhui Province.
文摘Two new functional polyacetylenes bearing different azobenzene group, -{ HC=C[azo-N （CH3）CH2CH2OH] } n-, [poly（EHAB）; azo = 4,4＇-azobenzene] and - { HC=C[azo-N（CH3）CH2CH2O COC3H7]},-, [poly（EEAB）]} were prepared by [Rh（nbd）Cl]2-Et3N catalysts. Poly（EHAB） has poor solubility while poly（EEAB） can be dissolved in common solvent. The polymers were characterized by FHR, ^1H NMR, UV and GPC. The nonlinear optical property of the soluble poly（EEAB） was investigated with 8 ns width pulse at 532 nm by Z-scan technique. The results show that poly（EEAB） is endowed with the larger third-order nonlinear optical property.
基金This work was supported by the National Natural Science Fund of China (Nos. 50073001 and 90206014)Program for New Century Excellent Talents in University (NCET-04-0588)the Outstanding Youth Fund of Anhui Province (No. 04044060)the Award for High Level Intellectuals (No. 2004Z027) from Anhui Province
文摘Two novel polyacetylenes bearing nonlinear optical chromophoric group poly（3-（4-[4-（n-butyloxy） phenylazophenyl]carbonyl）oxy-1-propyne） （poly（1a）） and poly（3-（4-[4-（n-heptyloxy）phenylazophenyl]carbonyl）-oxy-l- propyne） （poly（lb）） were synthesized with [Rh（nbd）Cl]2-EtaN as catalysts. These polyacetylenes are soluble by using an alkyl spacer and an alkyloxyl group as a substituent. They were characterized by FTIR, NMR, GPC and UV-Vis and their optical limiting and nonlinear optical properties were investigated using 8 ns pulse at 532 nm wavenumber. The results show that these soluble functional polyacetylenes possess optical limiting properties and large nonlinear optical properties and poly（1b） possesses better optical limiting and nonlinear optical properties than poly（ 1 a）.
基金financially supported by the National Natural Science Fund of China(Nos.20971021,51073031 and 20974018)the National Oversea Scholar Cooperation Research Found of China(No.50928301)
文摘A novel functional polyacetylene containing fluorene group as a pendant,poly（2-（p-methylstyrene）-7-acetylene-9,9-dioctyl-fluorene）, was synthesized in moderate yield by[Rh（nbd）Cl]_2-Et_3N catalyst.The structures and properties of monomer and polymer were characterized and evaluated with FTIR,NMR,UV-vis,GPC and Z-scan,respectively.The results show that the incorporation of fluorene into polyacetylene has endowed the resultant polymer with well optical limiting properties for laser at wavelength 780 nm based on two-photon absorption mechanism.
