New ladder-type chromophores, the quaterrylenebis(dicarboxdiimide)s 2, 18 and 23, have been synthesised which, despite their extended π-system, exhibit good solubility in organic solvents and film forming properties when adequately substituted. These unprecedented dyes, which absorb and even emit light in the NIR window, are also characterized by oustanding chemical, thermal and photochemical stability with regard to their absorption range. The potential formation of J-aggregates in strongly acidic media has been investigated and has been ruled out by combined
1
H NMR and UV-VIS-NIR spectroscopy experiments. In addition, their photophysical and electrochemical characteristics have been explored and are discussed.
我们合成了新的梯形发色团--季
丙烯双(二羧基二
亚胺)2、18 和 23,尽管它们具有扩展的 π 系统,但在有机溶剂中具有良好的溶解性,并且在充分取代后具有成膜特性。这些前所未有的
染料在近红外窗口吸收甚至发射光,在吸收范围方面还具有出色的
化学、热和光
化学稳定性。通过 1 H NMR 和 UV-VIS-NIR 光谱联合实验,研究人员排除了在强酸性介质中形成 J-团聚体的可能性。此外,还探讨并讨论了它们的光物理和电
化学特性。