New fabrication method for highly oriented J aggregates dispersed in polymer films
New fabrication method for highly oriented J aggregates dispersed in polymer films
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分散在聚合物薄膜中的高度定向 J 聚集体的新制造方法
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
Takayoshi Kobayashi
中科院分区：
文献类型：
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作者：
K. Misawa;H. Ono;K. Minoshima;Takayoshi Kobayashi
我们提出了一种新的制备方法，称为“垂直旋涂”，以制备分散在聚合物薄膜中的高度取向的J聚集体。在5K下测量了1，1‘-二乙基-2，2’-溴化喹菁PIC-BR的定向J聚集体的线性二色性光谱，J带峰的二色性比为5~10，取决于制备条件。对J带二向色性的精确测量表明，J带由两个跃迁偶极矩相互垂直的带组成。这种薄膜即使在室温下也是稳定的，并可用作非线性光学器件。
We present a new fabrication method, called ‘‘vertical spin coating,’’ to prepare highly oriented J aggregates dispersed in polymer films. Linear dichroic spectra of the oriented J aggregate of 1,1’‐diethyl‐2,2’‐quinocyanine bromide PIC‐Br were measured at 5 K. The dichroic ratio at the peak of J band was 5 to 10, dependent on the preparation conditions. Precise measurement of the dichroism at the J band revealed that the J band is composed of two bands with transition dipole moments perpendicular to each other. The films are stable even at room temperature, and have applications as nonlinear optical devices.