Tunable Aggregation-Induced Multicolor Emission of Organic Nanoparticles by Varying the Substituent in Naphthalene Diimide
作者:Pritam Choudhury、Saheli Sarkar、Prasanta Kumar Das
DOI:10.1021/acs.langmuir.8b02996
日期:2018.11.27
proper donor–acceptor moieties in the molecular backbone of the self-assembling unit can govern the AIE in combination with the intramolecular charge-transfer process. Consequently, the emission color of these AIE-gens (NAB-2–5) gets tuned from cyan blue to faint green to strong green and finally to bright orange. The tunable aggregation-induced multicolor emission was investigated by different spectroscopic
在本文中,我们设计了升天冬氨酸联萘二酰亚胺(NDI)为基础的具有苄基酯基团在两个具有不同取代基的端子(NAB-两性分子1 - 5)。明智地将取代基从诸如硝基苯的吸电子基团(EWG)修饰为给电子基团(EDG),甲氧基苯,最后修饰为扩展的芳族残基(萘)以调节NDI末端的π电子密度衍生品。所有合成的NDI衍生物都分子溶解在二甲基亚砜(DMSO)中,并且随着DMSO溶液中水含量的增加,NDI衍生物开始通过J自组装。-含水量在40%或以上时的聚集体。通过显微镜研究对在99%水中的DMSO(f w = 99%)中形成的自组装球形有机纳米颗粒进行了表征。所有的NDI衍生物在分子溶解状态(DMSO)中均显示出非常弱的发射。通过准分子形成,在自组装状态下观察到NDI衍生物(NAB- 1除外)的聚集诱导发射(AIE)。在350 nm处激发后,这些基于NDI的AIE发光剂(AIE-gens)(NAB- 2 –