A novel synthetic route to even-numbered ladder-type oligo(p-phenylene)s (LOPPs) carrying no solubilizing groups to facilitate vacuum-processing is presented. The influence of increasing bridging adjacent phenylene units on the optical and electrochemical properties is discussed in the series of p-sexiphenyl 6P, terfluorene 3F, and ladder-type sexiphenyl L6P. The influence of the extension of the Ï-system is taken into consideration as well. Furthermore it is shown that highly ordered thin films of L6P on alumina surfaces can be prepared by organic molecular beam deposition (OMBD).
提出了一种新型合成路线,用于合成不含溶解性官能团的偶数梯型寡聚(对-苯基)类物质(L
OPPs),以便于真空加工。讨论了增加桥接的相邻苯基单元对光学和电
化学性质的影响,涉及p-六苯(6P)、三
氟萘(3F)和梯型六苯(L6P)系列。同时还考虑了π-体系扩展的影响。此外,研究还表明,可以通过有机分子束沉积(OMBD)技术在铝氧化物表面制备高度有序的L6P薄膜。