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Liquid crystalline azulene colorants

机译：液晶氮z着色剂

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摘要

Organic materials which are composed of long rod-like and fairly rigid dipolar molecules frequently form one or several liquid crystal phases between the crystalline solid and the amorphous isotropic liquid. The credit for recognizing liquid crystal phase for the first time goes to the botanist Reinitze who discovered liquid crystalline cholesterol benzoate in the year 1888. This effect was considered a strange curiosity until the 1960s. In the 1970s, liquid crystals made a significant impact. because of their application in liquid crystalline displays of watches, desk calculators and other such appliances. Colorant molecules, when present in liquid crystalline media, are oriented in specific directions determined by the ordered structure of liquid crystal host, and the direction of the applied field. When the colorant molecule is restrained in this manner and irradiated with plane polarized light at the correct frequency, the absorption band contributing to the color will have a dependence of its intensity on the plane of polarization of light. The absorption band will be the most intense when the orientation axis of the colorant molecule is parallel to the electric sector of the radiation. The above phyenomenon is referred to as optical dichroism. Several organic colorants are used in liquid crystal displays. In this article azulene colorants having optical dichroism are discussed.
机译：由长棒状且相当坚硬的偶极分子组成的有机材料通常会在结晶固体和无定形各向同性液体之间形成一个或几个液晶相。植物学家Reinitze首次承认了液晶相的功劳，他在1888年发现了液晶胆固醇苯甲酸酯。直到1960年代，这种效应一直被认为是一种奇怪的好奇心。 1970年代，液晶产生了重大影响。因为它们在钟表，台式计算器和其他此类设备的液晶显示器中的应用。当存在于液晶介质中时，着色剂分子在特定方向上定向，该特定方向由液晶主体的有序结构和所施加场的方向确定。当着色剂分子以这种方式被束缚并且以正确的频率被平面偏振光照射时，有助于颜色的吸收带将具有其强度对光的偏振平面的依赖性。当着色剂分子的取向轴平行于辐射的电扇形时，吸收带将是最强的。上述现象称为光学二向色性。液晶显示器中使用了几种有机着色剂。在本文中，讨论了具有光学二色性的a青色着色剂。

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