Highly Oriented Langmuir−Blodgett Films of Poly(p-phenylenevinylene) Using a Long Chain Sulfonic Counterion
Highly Oriented Langmuir−Blodgett Films of Poly(p-phenylenevinylene) Using a Long Chain Sulfonic Counterion
复制标题
使用长链磺酸抗衡离子的高度取向的聚（对亚苯基亚乙烯基）Langmuir−Blodgett 薄膜
DOI：
10.1021/ma000316r
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发表时间：
2000
期刊：
影响因子：
5.5
通讯作者：
F. Guimarães
中科院分区：
文献类型：
--
作者：
A. Marletta;D. Gonçalves;O. N. Oliveira;A. Faria;F. Guimarães
聚（对亚苯基亚乙烯基）（PPV）前体的LB膜是用两亲性前体聚（亚二甲苯基四氢噻吩氯化物）（PTHT）制备的，其中氯化钯被长链十二烷基苯磺酸盐（DBS）离子取代。稳定的PTHT-DBS单层膜以LB膜的形式转移到石英基底上。使用DBS允许PPV膜在大气压下在低至80 °C的温度下转化，其共轭长度和光学性质优于在受控气氛下在高于200 °C的温度下转化的标准膜。这些LB-PPV薄膜是高度各向异性的线性二向色性实验表明，使用线性偏振光吸收和发射。平行于浸渍方向和垂直于浸渍方向的发射光的强度之间的二向色比约为0.05。17，这比在偏振吸收实验中发现的3.6的二向色比高得多。这种差异表明一种有效的...
Langmuir−Blodgett (LB) films of a poly(p-phenylenevinylene) (PPV) precursor were prepared using an amphiphilic precursor, poly(xylylidenetetrahydrothiophenium chloride) (PTHT), where the counterion chloride was replaced by a long chain dodecylbenzenesulfonate (DBS) ion. Stable PTHT−DBS monolayers were transferred onto quartz substrates in the form of LB films. Using DBS allowed PPV films to be converted under atmospheric pressure at temperatures as low as 80 °C, with conjugation length and optical properties better than for standard films converted at temperatures above 200 °C under controlled atmospheres. These LB−PPV films are highly anisotropic as demonstrated by linear dichroism experiments using linearly polarized optical absorption and emission. The dichroic ratio between the intensity of the emitted light parallel and perpendicular to the dipping direction was ca. 17, which is much higher than the dichroic ratio of 3.6 found in the polarized absorption experiment. This difference indicates an effic...