Highly Oriented J-Aggregates of Bisazomethine Dye on Aligned Poly(tetrafluoroethylene) Surfaces
Highly Oriented J-Aggregates of Bisazomethine Dye on Aligned Poly(tetrafluoroethylene) Surfaces
复制标题
对齐聚四氟乙烯表面上双偶氮甲碱染料的高度定向 J 聚集体
DOI：
10.1021/jp2063436
复制
发表时间：
2011
影响因子：
3.7
通讯作者：
T. Aoyama
中科院分区：
文献类型：
--
作者：
Toshihiko Tanaka;S. Matsumoto;Takashi Kobayashi;M. Satoh;T. Aoyama
高度取向的J-聚集体已获得固体，薄膜的双甲亚胺染料对齐聚（PTFE）表面上。聚集体由于其高取向有序性而表现出显著的光学各向异性：偏振吸收光谱中J峰处的二色性比达到25。此外，这种取向还使薄膜的三阶非线性光学极化率[χ（3）]显著增加，是各向同性薄膜的10倍以上。大分子不形成聚集体，而是形成聚集体应该分散的结晶域。偏振吸收光谱（可见光和IR）和X射线衍射测量表明，分子在聚集体和晶畴中均以其长轴平行于PTFE链的方式取向（[2 0 −1]轴平行于PTFE链，（010）平面平行于基底表面）。结合原子力显微镜观察到的聚集体的形貌，讨论了聚集体的生长机理。
Highly oriented J-aggregates have been obtained in solid, thin films of a bisazomethine dye on aligned poly(tetrafluoroethylene) (PTFE) surfaces. The aggregates show remarkable optical anisotropy resulting from their high orientational order: the dichroic ratios at their J peaks in polarized absorption spectra reach 25. Moreover, this orientation also brings about a remarkable increase in the third-order nonlinear optical susceptibility [χ(3)] of the films of over 10 times that of their isotropic films. Major molecules do not form the aggregates, but rather, form crystalline domains where the aggregates should be dispersed. Polarized absorption spectra (visible and IR) and X-ray diffraction measurements reveal that the molecules are oriented with their long axis parallel to the PTFE chains both in the aggregates and in the crystalline domains ([2 0 −1] axis ∥ PTFE chains, (010) plane ∥ substrate surface). The growth mechanism of the aggregates is discussed on the basis of both the morphology observed by a...
LB 和气相沉积薄膜中螺吡喃衍生物的 J 聚集体形成
DOI：
--
发表时间：
2006
期刊：
Molecular Crystals and Liquid Crystals Vol. 445
影响因子：
--
作者：
Toshiyuki;Kakudate;Akira Murayama;Tomoharu Asano;Kouji Matsumoto
通讯作者：
Kouji Matsumoto
影响因子：
3.9
作者：
Kitahama, Yasutaka;Kimura, Yasuyuki;Takazawa, Ken
通讯作者：
Takazawa, Ken