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

炭黑（CB）是市场上优良的黑色颜料。CB成本低，光和热稳定，同时具有高遮盖力。正因为如此，黑炭黑被认为是完美的黑色颜料。然而，最近有人指出，CB中含有苯并芘和其他致癌杂质，因为。炭黑通常在高温下由碳氢化合物的不完全分解制备。还有另一个问题是关于CB的导电性的固有性质。电绝缘黑色颜料适用于LCD（液晶显示器）滤色器应用。由于这些原因，人们试图开发一种既环保又绝缘的黑色颜料。我们的想法是通过两条覆盖整个可见区域的吸收带来实现黑色颜料。前者是由单个分子产生的，而后者是由过渡偶极子之间的分子间相互作用产生的。我们在晶体结构和分子间相互作用的基础上对苝及其相关化合物进行了一系列的研究。最后，我们获得了一种具有苯并咪唑苝衍生物的黑色颜料。关键技术是利用过渡偶极子之间的相互作用和高温煅烧。

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.