One-Pot Synthesis and Structure–Property Relationship of Aminomaleimides: Fluorescence Efficiencies in Monomers and Aggregates Easily Tuned by Switch of Aryl and Alkyl
作者:Qiuhua Zhu、Ziwei Ye、Weijie Yang、Xiaotie Cai、Ben Zhong Tang
DOI:10.1021/acs.joc.6b02706
日期:2017.1.20
Here, a simple one-pot, three-component reaction (3CR) (method I) for the synthesis of various di- and monosubstituted aminomaleimides (DAMIs and MAMIs) has been developed, and the reported 3CR (method II) has been found to be efficient only for the synthesis of MAMIs with R2 = alkyl. Twelve AMIs were designed and synthesized for investigation of the influence of structures on their optical properties
有机荧光团由于其广泛的应用而引起了极大的兴趣。它们通常包含带有芳族部分的电子共轭体系,在稀溶液中显示出高发射,但在聚集时则发射更弱甚至没有发射。在这里,已经开发了一种简单的一锅三组分反应(3CR)(方法I),用于合成各种二取代和单取代的氨基马来酰亚胺(DAMI和MAMI),并且发现了报道的3CR(方法II)仅对具有R 2的MAMI合成有效=烷基。设计并合成了十二个AMI,以研究结构对其在单体和聚集体中的光学性能的影响。发现在不同溶剂中,烷基MAMI,烷基DAMI和芳基AMI / DAMI表现出非常不同的荧光效率,只有具有丁基和油基的MAMI在粉末中的发射率与在非极性溶液中相似。单晶结构表明它们在聚集体中的荧光效率主要与分子堆积模式相关。高效的合成方法,对质子溶剂或极性溶剂的灵敏的荧光开-关响应以及单体和聚集体中不带任何芳族部分的AMI异常高发射预计将在应用和理论领域引起极大兴趣。