technologies and applications. The design thereof is however quite complex since only a few dye classes show these properties. Polymeric squaraine dyes have them however they are mostly hardly soluble. Herein four dimeric soluble and easy to prepare squaraine dye dimers are reported with absorption maxima between 679 and 805 nm. The synthesis, characterisation, the determination of the physicochemical
在许多技术和应用中,近红外(NIR)区域的强吸收能力是必不可少的。然而,由于只有少数
染料类别显示出这些性质,因此其设计是相当复杂的。聚合
方酸菁
染料具有它们,但是它们几乎很难溶解。本文报道了四个二聚体可溶且易于制备的
方酸染料二聚体,其最大吸收在679和805nm之间。合成,表征,理化性质的确定和计算机模拟将计算的分子几何学,分子轨道和计算的总电荷密度表面的研究进行了比较。两种生色团的耦合取决于它们之间的距离,桥的π电子系统,其空间取向和电子跃迁矩的空间取向而定。两个发色团越近,桥具有的平面外元素越少,光学带隙越小。