Broadband Two-Photon Absorption Characteristics of Highly Photostable Fluorenyl-Dicyanoethylenylated [60]Fullerene Dyads
作者:Seaho Jeon、Min Wang、Wei Ji、Loon-Seng Tan、Thomas Cooper、Long Chiang
DOI:10.3390/molecules21050647
日期:——
We synthesized four C60-(light-harvesting antenna) dyads C60 (>CPAF-Cn) (n = 4, 9, 12, or 18) 1-Cn for the investigation of their broadband nonlinear absorption effect. Since we have previously demonstrated their high function as two-photon absorption (2PA) materials at 1000 nm, a different 2PA wavelength of 780 nm was applied in the study. The combined data taken at two different wavelength ranges
为了研究它们的宽带非线性吸收效应,我们合成了四个C60-(光捕获天线)二元组C60(> CPAF-Cn)(n = 4、9、12或18)1-Cn。由于我们先前已经证明了它们在1000 nm处具有高光子吸收能力(2PA),因此在本研究中使用了2PA波长为780 nm的不同材料。在两个不同波长范围内获取的组合数据证实了1-Cn的宽带特性。我们提出,观察到的宽带吸收可能归因于C60>笼和CPAF-Cn部分之间的部分π共轭,通过内定互变异构共振,产生具有增强的分子共轭的共振态。这种瞬态可以增加其2PA和在800 nm处的激发态吸收。此外,