Four phenoxysilicon networks for nonlinear optical (NLO) applications were designed and prepared by an extended sol-gel process without additional H2O and catalyst. All poled polymer network films possess high second-...Four phenoxysilicon networks for nonlinear optical (NLO) applications were designed and prepared by an extended sol-gel process without additional H2O and catalyst. All poled polymer network films possess high second-order nonlinear optical coefficients (d(33)) Of 10(-7)similar to 10(-8) esu. The investigation of NLO temporal stability at room temperature and elevated temperature (120 degreesC) indicated that these films exhibit high d(33) stability because the orientation of the chromophores are locked in the phenoxysilicon organic/inorganic networks.展开更多
In this study,two new dendronized nonlinear optical(NLO)polymers were synthesized with high FTC chromophore loading density by introduction of high generation chromophore dendrons on the side chains.Due to their suita...In this study,two new dendronized nonlinear optical(NLO)polymers were synthesized with high FTC chromophore loading density by introduction of high generation chromophore dendrons on the side chains.Due to their suitable molecular weights,both of them possessed good solubility in common solvents.They also inherited the advantages of dendrimers(large NLO coefficient),especially for PG2 whose NLO coefficient d33 value was as high as 282 pm·V^–1.Also,PG2 had a good temporal stability with 80%of its maximum value being retained at the temperature as high as 129℃.展开更多
The azo chromophore anchored polyurethanes were synthesized by azo coupling of 4 nitrobenzenediazonium tetrafluoroborate and reacting the obtained 6 nitrobenzothiazole 2 diazoniun tetrafluoroborate with polyurethane i...The azo chromophore anchored polyurethanes were synthesized by azo coupling of 4 nitrobenzenediazonium tetrafluoroborate and reacting the obtained 6 nitrobenzothiazole 2 diazoniun tetrafluoroborate with polyurethane in dimethylforamide in the presence of HAc and its sodium salt. The polyurethanes were characterized by IR, UV Vis and 1H NMR spectra. The method has the advantages of simplicity and facility in preparing polyurethane NLO materials with different chromophores.展开更多
文摘Four phenoxysilicon networks for nonlinear optical (NLO) applications were designed and prepared by an extended sol-gel process without additional H2O and catalyst. All poled polymer network films possess high second-order nonlinear optical coefficients (d(33)) Of 10(-7)similar to 10(-8) esu. The investigation of NLO temporal stability at room temperature and elevated temperature (120 degreesC) indicated that these films exhibit high d(33) stability because the orientation of the chromophores are locked in the phenoxysilicon organic/inorganic networks.
基金financially supported by the National Natural Science Foundation of China (No. 21734007)
文摘In this study,two new dendronized nonlinear optical(NLO)polymers were synthesized with high FTC chromophore loading density by introduction of high generation chromophore dendrons on the side chains.Due to their suitable molecular weights,both of them possessed good solubility in common solvents.They also inherited the advantages of dendrimers(large NLO coefficient),especially for PG2 whose NLO coefficient d33 value was as high as 282 pm·V^–1.Also,PG2 had a good temporal stability with 80%of its maximum value being retained at the temperature as high as 129℃.
文摘The azo chromophore anchored polyurethanes were synthesized by azo coupling of 4 nitrobenzenediazonium tetrafluoroborate and reacting the obtained 6 nitrobenzothiazole 2 diazoniun tetrafluoroborate with polyurethane in dimethylforamide in the presence of HAc and its sodium salt. The polyurethanes were characterized by IR, UV Vis and 1H NMR spectra. The method has the advantages of simplicity and facility in preparing polyurethane NLO materials with different chromophores.
