A host-guest based colorant was synthesized by intercalating indigo molecules into the nanochannels of zeolite L (ZL). Reductive washing thereby ensured the efficient and selective removal of non-intercalated indigo molecules. The UV-vis diffuse reflectance spectrum of the product after intercalation and reductive washing (designated as indigo-ZL) was found to resemble the solution spectrum of indigo, leading to the conclusion that the formation of indigo aggregates is prevented due to the steric constraints imposed by the microporous structure of ZL. The application of indigo-ZL on cotton was tested by roll coating. The light absorption properties of the resulting textile prints showed no significant alteration when compared to the pure indigo-ZL powder. The UV-vis diffuse reflectance spectra of mixtures consisting of indigo-ZL and a further ZL-based colorant were successfully predicted by the weighted addition of the respective primary spectra.

通过将靛蓝分子插入到沸石L（ZL）的纳米通道中，合成了基于主客体的着色剂。还原洗涤从而确保有效和选择性地去除未插入的靛蓝分子。发现插层和还原洗涤后产品的UV-vis漫反射光谱（称为靛蓝ZL）类似于靛蓝的溶液光谱，从而得出结论，由于施加了空间限制，阻止了靛蓝聚集体的形成通过ZL的微孔结构。通过辊涂测试靛蓝-ZL在棉上的应用。与纯靛蓝-ZL粉末相比，所得纺织品印花的光吸收性能没有显示出明显的变化。