A NEW SOLUBLE POLY(P-PHENYLENE) WITH TETRAHYDROPYRENE REPEATING UNITS
A NEW SOLUBLE POLY(P-PHENYLENE) WITH TETRAHYDROPYRENE REPEATING UNITS
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DOI：
10.1021/ma00117a030
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发表时间：
1995-06-19
期刊：
影响因子：
5.5
通讯作者：
MULLEN, K
中科院分区：
文献类型：
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作者：
KREYENSCHMIDT, M;UCKERT, F;MULLEN, K
以2，7-二溴-4，9-二正辛基-4，5，9，10-四氢芘（3a）为单体，通过缩聚反应合成了第一种基于4，5，9，10-四氢芘重复单元的聚对苯撑（PPP）。这种新型聚合物可溶于常见的有机溶剂，如CHCl 3、CH 2Cl 2、THF和甲苯。与其他PPP相比，增溶烷基取代基不会引起芳基-芳基单键的扭转。GPC分析表明单峰分子量分布，并且基于四氢芘单元的平均聚合度为40（聚苯乙烯标准），对应于80个亚苯基环。核磁共振谱表明，所得聚四氢芘（PTHPy，4）具有规则的结构。在THF溶液中测得的荧光光谱显示在425 nm处的发射最大值，而对于膜，最大值移动到457 nm。上述特性使新型PPP成为用于发光二极管的有吸引力的材料。
The first poly(p-phenylene) (PPP) based on repeating 4,5,9,10-tetrahydropyrene units has been synthesized starting from 2,7-dibromo-4,9-di-n-octyl-4,5,9,10-tetrahydropyrene (3a) as the monomer in a polycondensation reaction. The new polymer is soluble in common organic solvents such as CHCl3, CH2Cl2, THF, and toluene. By contrast with other PPP's, the solubilizing alkyl substituents do not induce torsion about the aryl-aryl single bonds. GPC analysis indicates a monomodal molecular weight distribution, and the average degree of polymerization, based on tetrahydropyrene units, is 40 (polystyrene standards), corresponding to 80 phenylene rings. The NMR spectra reveal that the poly(tetrahydropyrene) (PTHPy, 4) obtained possesses a regular structure. The fluorescence spectrum measured in THF solution shows an emission maximum at 425 nm, while for the film, the maximum is shifted to 457 nm. The above characteristics qualify the new PPP as an attractive material for use in light-emitting diodes.