Solution and film photoluminescence of mesityl-substituted PPVs and low molecular weight models
作者:Rhett C. Smith、L. Beth Gleason、John D. Protasiewicz
DOI:10.1039/b601824f
日期:——
Poly(p-phenylenevinylene)s and low molecular weight analogues featuring mesityl substituents were prepared and the concentration dependent solution and film absorption and photoluminescent spectroscopic properties of these materials compared to those of less bulky analogues. The presence of bulky mesityl substituents is observed to exert a marked influence on the absorption and photoluminescent properties of these materials by preventing close interchain interactions. A single crystal structure analysis of 1,4-bis(2,6-dimesitylstyryl)-2,5-di-n-hexyloxybenzene (3) shows that despite severe steric crowding, coplanarity (and hence, conjugation) of the distyrylbenzene core is possible.
制备了具有异三甲苯基取代基的聚(对亚苯基亚乙烯基)和低分子量类似物,并将这些材料的浓度依赖性溶液和薄膜吸收以及光致发光光谱特性与体积较小的类似物进行比较。据观察,大的异丙基取代基的存在通过阻止紧密的链间相互作用对这些材料的吸收和光致发光性质产生显着影响。 1,4-双(2,6-二甲基苯乙烯基)-2,5-二正己氧基苯 (3) 的单晶结构分析表明,尽管存在严重的空间拥挤,但二苯乙烯基苯核的共面性(以及因此的共轭性)是可能的。