CAJ | 학술논문

一种新的含烷基取代的苯并菲侧基的"毛-棒"状(hairy-rod)梯形聚倍半硅氧烷(LPSQ)可以在空气-水界面形成稳定的单分子层,研究了温度、铺展溶剂和浓度对π-A等温曲线的影响.在适当的表面压下,以甲苯为铺展溶剂该单分子层可以被成功地转移至疏水的硅片或石英片上形成均一稳定的Y-型LB膜,其紫外吸收强度在几个月内均保持不变,说明该LB膜具有良好的稳定性,AFM图像表明其形成了均一致密的膜.通过偏振紫外光谱和荧光光谱研究了其面内各向异性,发现LPSQ的分子链采取了平行于拉膜方向的优先取向,最优取向因子S为0.42.
일충신적함완기취대적분병비측기적"모-봉"상(hairy-rod)제형취배반규양완(LPSQ)가이재공기-수계면형성은정적단분자층,연구료온도、포전용제화농도대π-A등온곡선적영향.재괄당적표면압하,이갑분위포전용제해단분자층가이피성공지전이지소수적규편혹석영편상형성균일은정적Y-형LB막,기자외흡수강도재궤개월내균보지불변,설명해LB막구유량호적은정성,AFM도상표명기형성료균일치밀적막.통과편진자외광보화형광광보연구료기면내각향이성,발현LPSQ적분자련채취료평행우랍막방향적우선취향,최우취향인자S위0.42.
A novel kind of "hairy-rod" ladder polysilsesquioxane (LPSQ) with alkyl substituted triphenylene side groups formed a stable monolayer on the air-water interface,and the effects of temperature, solvents and concentration of LPSQ solution on π-A isotherm curves were investigated.The monolayers of LPSQ can be successfully transferred onto hydrophobic surface of silicon wafer or quartz plate to develop a very stable and uniform Y-type Langmuir-Blodgett (LB) film when using toluene as the spreading solvent at proper surface pressure.High stability of LPSQ LB films is confirmed by the fact that the intensity of UV absorption does not decay within several months and AFM image shows uniform and compact films without noticeable defects.The in-plane anisotropy was monitored by the combination of polarized UV and fluorescence spectroscopy,revealing that the backbones of LPSQ adopted a preferential orientation parallel to the dipping direction with an optimum orientation parameter S of 0.42.Furthermore,the stable and uniform LB films of LPSQ with the triphenylene side groups promise to be a fine one-dimensional molecular/nano-wire material.