Wu Zhongkui, Wu Sanxie, Lu Zhuhong, Liang Yingqiu
Lab of Mesoscopic Materials and Chemistry and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, 210093, People's Republic of China.
J Colloid Interface Sci. 2002 Jul 1;251(1):125-30. doi: 10.1006/jcis.2002.8426.
A poly(heteroarylene methine) derivative, poly[(2,5-thiophenediyl) (p-n-methyl, n-octylaminobenzylidene) (2,5-thiophenequinodimethaneiyl)] (PTABQ), has been synthesized and spread at the air-water interface. The influences of three kinds of solutions on PTABQ monolayer behavior at the air-water interface have been investigated via the measurements of the pi-A isotherm and film stability. The results show that all three kinds of PTABQ solutions are apt to form the stable and transferable monolayer film organized with the plane of its pi-system nearly perpendicular to the air-water interface. Moreover, the monolayer-forming ability of PTABQ can be improved by introducing a water-soluble amphiphilie as an extractable spread-aiding component, which is further proved by the AFM images and FTIR spectra of the transferred films. UV-visible absorption spectra indicate that the well-ordered layer-by-layer structure is successfully controlled in the LB films. The optical bandgap of PTABQ is reduced for the ordered arrangement of its molecules in LB films. The intrinsic electrical conductivity of PTABQ LB films is 8.1 x 10(-8) S/cm and the conductivity of iodine-doped films is 5.7 x 10(-7) S/cm.
一种聚（杂亚芳基次甲基）衍生物，聚[（2,5-噻吩二基）（对-正甲基，正辛基氨基亚苄基）（2,5-噻吩醌二甲烷二基）]（PTABQ）已被合成并铺展在空气-水界面。通过测量π-A等温线和膜稳定性，研究了三种溶液对PTABQ在空气-水界面的单层行为的影响。结果表明，所有三种PTABQ溶液都易于形成稳定且可转移的单层膜，其π-体系平面几乎垂直于空气-水界面排列。此外，通过引入水溶性两亲物作为可萃取的铺展辅助成分，可以提高PTABQ的单层形成能力，这通过转移膜的原子力显微镜图像和傅里叶变换红外光谱得到了进一步证明。紫外-可见吸收光谱表明，在LB膜中成功控制了有序的逐层结构。由于PTABQ分子在LB膜中的有序排列，其光学带隙减小。PTABQ LB膜的本征电导率为8.1×10^(-8) S/cm，碘掺杂膜的电导率为5.7×10^(-7) S/cm。
