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机构地区:[1]四川大学高分子材料科学与工程学院高分子材料工程国家重点实验室,成都610065
出 处:《高等学校化学学报》2008年第11期2321-2325,共5页Chemical Journal of Chinese Universities
基 金:国家自然科学基金(批准号:50273021)资助
摘 要:以1,3,5-三苯基苯为中心核,4-乙烯基联苯为桥联结构,通过Heck偶联反应合成了含六苯基苯结构单元的桨型分子,对其结构进行了表征;对桨型分子及其结构单元[包括4-乙烯基联苯、含六苯基苯结构的'臂'及其母体结构1,3,5-三(4-苯乙烯基苯基)苯]在溶液中的光致发光特性的研究结果表明,桨型分子具有2个发光中心,最大发射波长在蓝色光范围内分别为397和445 nm.A novel propeller-shaped polyphenylene(9), based on hexaphenylbenzene-graphite subunits and a core molecule, 1,3,5-tris (4-styrylphenyl) benzene ( 8 ), was synthesized by Heek coupling reaction of 4- (4- vinylphenylene) hexaphenylbenzene (7) with 1,3,5-tris (4-iodophenylbenzene) ( 4 ). The structure of molecule 9 was characterized by FTIR, ^1H NMR, ^13C NMR, GPC, MALDI-TOF mass spectrum, and elemental analysis. The absorption and photoluminescence spectra of propeller-shaped molecule 9 were investigated. Compared with structurally related chromophoric units including 4-vinylbiphenyl, 1 - [ 4- ( 4-vinylphenyl ) phen- yl ] -2,3,4,5,6-pentaphenylbenzene 7 and 1,3,5-tris ( 4-styrylphenyl ) benzene 8, the absorption peak of molecule 9 was red-shifted to 355 nm. This molecule exhibited two maximum emitting peaks at 397 nm and 445 nm in the range of blue luminescence with photoluminescence efficiency being 19%.
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