Two crosslinkable poly（p-phenyleneethynylene）s（PPEs）： poly[2,5-di（2＇-ethyl-hexyloxy）-1,4-phenylenecthynylene] with end-capped vinyl（PPE1） and poly[2,5-di（allyloxy）-1,4-phenyleneethynylene-2,5-di（2＇-ethyl...Two crosslinkable poly（p-phenyleneethynylene）s（PPEs）： poly[2,5-di（2＇-ethyl-hexyloxy）-1,4-phenylenecthynylene] with end-capped vinyl（PPE1） and poly[2,5-di（allyloxy）-1,4-phenyleneethynylene-2,5-di（2＇-ethyl-hexyloxy）-1,4-phenyleneethynylene]（PPE2） were synthesized. Via the thermal addition reactions of vinyl end groups of PPE1 and allyloxy side groups of PPE2, crosslinked polymers C-PPE1 and C-PPE2 were obtained, respectively. The two polymers were characterized by wide-angle X-ray diffraction（WXRD）, ultraviolet-visible（UV-Vis） absorption, and photoluminescence（PL）. The results indicate that in the solid state, the polymer chains of PPE1 were packed with a low degree of crystallinity because of the sterically hindered（2＇-ethyl-hexyl）oxy branched side chains, but, because of the introduction of allyloxy side chains, the polymer chains of PPE2 were packed in an order fashion with a high degree of crystallinity. Because of the high crosslinking density in C-PPE2, the formation of aggregates and excimer was hampered by the formed crosslinking network more effectively in C-PPE2 film than in C-PPE1 film.展开更多
通过Sonogashira偶合反应合成了3种含pentiptycene基团、侧链分别含对称烷氧基取代、含非对称烷氧基取代和含烷基取代的聚对苯撑乙炔衍生物PPE-A、B和C。采用1 H NMR,FT-IR,UV-Vis和PL等仪器对其进行了表征。讨论了侧链取代基类型对PPE...通过Sonogashira偶合反应合成了3种含pentiptycene基团、侧链分别含对称烷氧基取代、含非对称烷氧基取代和含烷基取代的聚对苯撑乙炔衍生物PPE-A、B和C。采用1 H NMR,FT-IR,UV-Vis和PL等仪器对其进行了表征。讨论了侧链取代基类型对PPE溶解性和光学性能的影响;研究了间二硝基苯(m-DNB)和对硝基甲苯(p-NT)两种硝基化合物对PPE-A和B溶液的荧光淬灭影响,结果表明,PPE-A和B具有很高的荧光强度,对m-DNB和p-NT显示出良好的荧光响应。展开更多
基金Supported by the National Natural Science Foundation of China(Nos.20771030 and 20671025)
文摘Two crosslinkable poly（p-phenyleneethynylene）s（PPEs）： poly[2,5-di（2＇-ethyl-hexyloxy）-1,4-phenylenecthynylene] with end-capped vinyl（PPE1） and poly[2,5-di（allyloxy）-1,4-phenyleneethynylene-2,5-di（2＇-ethyl-hexyloxy）-1,4-phenyleneethynylene]（PPE2） were synthesized. Via the thermal addition reactions of vinyl end groups of PPE1 and allyloxy side groups of PPE2, crosslinked polymers C-PPE1 and C-PPE2 were obtained, respectively. The two polymers were characterized by wide-angle X-ray diffraction（WXRD）, ultraviolet-visible（UV-Vis） absorption, and photoluminescence（PL）. The results indicate that in the solid state, the polymer chains of PPE1 were packed with a low degree of crystallinity because of the sterically hindered（2＇-ethyl-hexyl）oxy branched side chains, but, because of the introduction of allyloxy side chains, the polymer chains of PPE2 were packed in an order fashion with a high degree of crystallinity. Because of the high crosslinking density in C-PPE2, the formation of aggregates and excimer was hampered by the formed crosslinking network more effectively in C-PPE2 film than in C-PPE1 film.
文摘通过Sonogashira偶合反应合成了3种含pentiptycene基团、侧链分别含对称烷氧基取代、含非对称烷氧基取代和含烷基取代的聚对苯撑乙炔衍生物PPE-A、B和C。采用1 H NMR,FT-IR,UV-Vis和PL等仪器对其进行了表征。讨论了侧链取代基类型对PPE溶解性和光学性能的影响;研究了间二硝基苯(m-DNB)和对硝基甲苯(p-NT)两种硝基化合物对PPE-A和B溶液的荧光淬灭影响,结果表明,PPE-A和B具有很高的荧光强度,对m-DNB和p-NT显示出良好的荧光响应。
