Studies on the novel organic black pigments utilizing interactions between transition dipoles and calcination at high temperatures

炭黑(CB)是市场上一种优良的黑色颜料。炭黑成本低，具有极好的光热稳定性，具有较高的遮盖力。正因为如此，炭黑被认为是完美的黑色颜料。然而，最近有人指出，CB包括苯并茂和其他会致癌的杂质，因为。炭黑通常是通过碳氢化合物在高温下不完全分解而制备的。还有另一个关于炭黑导电性的固有性质的问题。电绝缘黑色颜料适用于LCD(液晶显示器)滤色器应用。出于这些原因，人们试图开发一种环保和电绝缘的黑色颜料。我们的想法是通过覆盖整个可见光区域的两个吸收带来实现黑色颜料。前者是由单个分子引起的，而后者是由过渡偶极子之间的分子间相互作用引起的。我们从其晶体结构和分子间相互作用的角度出发，开展了一系列的研究工作。最后，我们得到了一种含有苯并咪唑并二苯衍生物的黑色颜料。关键技术是利用过渡偶极子与高温焙烧之间的相互作用。

Carbon black (CB) is an excellent black pigment on the market. CB is low-cost and extremely light and heat stable, as also characterized by a high hiding power. Because of this, CB is regarded as the perfect black pigment. However, it has recently been pointed out that CB includes benzpyrene and other impurities that induce cancers, because. CB is usually prepared by incomplete decomposition of hydrocarbons at elevated temperatures. There is also another issue concerning the inherent nature of the electrical conductivity of CB. An electrically-insulating black pigment is appropriate for LCD (liquid crystal display) color filter applications. For these reason, an attempt was made to develop a black pigment that is environmentally friendly and electrically insulating. Our idea is to realize a black pigment by two absorption bands which cover the whole visible region. The former band is due to individual molecules while the latter arises from intermolecular interactions between transition dipoles. We have carried out a series of investigations on perylene and its related compounds on the basis of the crystal structure and intermolecular interactions. Finally, we have achieved a black pigment with benzoimidazo perylene derivatives. The key technologies were to utilize interactions between transition dipoles and calcination at high temperatures.