The linear trienes were obtained in high yields by copper-mediated cycloaddition of 2,5-bis（trimethylsilyl）zirconacyclo- pentadienes with dimethyl acetylenedicarboxylate （DMAD） which can be quantitatively converte...The linear trienes were obtained in high yields by copper-mediated cycloaddition of 2,5-bis（trimethylsilyl）zirconacyclo- pentadienes with dimethyl acetylenedicarboxylate （DMAD） which can be quantitatively converted to novel asymmetric hex- asubstituted cyclohexadienes with high （E）-stereoselectivity. The structure of cyclohexadienes was determined via X-ray analysis.展开更多
A series of new fluoro-containing copolymers have been synthesized by a Mitsunobu reaction with 4,4＇-（hexafluoroisopropylidene） bisphenol A（6FBPA） and the corresponding N,N-dihydroxyethylaminoaryl azo or ring-loc...A series of new fluoro-containing copolymers have been synthesized by a Mitsunobu reaction with 4,4＇-（hexafluoroisopropylidene） bisphenol A（6FBPA） and the corresponding N,N-dihydroxyethylaminoaryl azo or ring-locked triene compounds, which have high thermal stability and good solubility in organic solvents.The nonlinear optical（NLO） measurements made by Marker fringe method at 1064 nm indicate that the copolymers embedded with the ring-locked triene and azo chromophores exhibit higher macroscopic nonlinear optical coefficient（70.2 pm/V and 26.5-34.6 pm/V,respectively）.Thermal analysis and UV-visible absorption spectra show that the copolymers have good thermal stability（T_d= 264-319℃） and optical transparency （λ_（max）500 nm）.展开更多
基金funded by National Natural Science Foundation of China(No21102099)
文摘The linear trienes were obtained in high yields by copper-mediated cycloaddition of 2,5-bis（trimethylsilyl）zirconacyclo- pentadienes with dimethyl acetylenedicarboxylate （DMAD） which can be quantitatively converted to novel asymmetric hex- asubstituted cyclohexadienes with high （E）-stereoselectivity. The structure of cyclohexadienes was determined via X-ray analysis.
基金supported by the National Natural Science Foundation(No20774039)the National Basic Research Program of China(No2007CB925103)
文摘A series of new fluoro-containing copolymers have been synthesized by a Mitsunobu reaction with 4,4＇-（hexafluoroisopropylidene） bisphenol A（6FBPA） and the corresponding N,N-dihydroxyethylaminoaryl azo or ring-locked triene compounds, which have high thermal stability and good solubility in organic solvents.The nonlinear optical（NLO） measurements made by Marker fringe method at 1064 nm indicate that the copolymers embedded with the ring-locked triene and azo chromophores exhibit higher macroscopic nonlinear optical coefficient（70.2 pm/V and 26.5-34.6 pm/V,respectively）.Thermal analysis and UV-visible absorption spectra show that the copolymers have good thermal stability（T_d= 264-319℃） and optical transparency （λ_（max）500 nm）.
