摘要
有机荧光材料因其分子结构可调,材料性能优越而被广泛关注,已成为材料学、有机电子学等领域研究热点。为了获得发光颜色可控的有机荧光材料,实现其高效发光,本研究合成三种1,4-不对称苯基体系的有机荧光分子,分别在1-位引入受电子基团(Acceptor)氰基,4-位引入供电子基团(Donor)酚噻嗪、苯并咔唑或4,4-二甲氧基二苯胺,构建D-A结构有机荧光分子。进一步通过UV-Vis和荧光光谱测试其光物理性质,辅之理论计算加以验证。数据表明:通过改变1,4-位取代基,有效调控分子的HOMO-LUMO能级,调节材料的电子分布,增大了分子内电荷耦合作用,实现分子内电荷转移(Intramolecular Charge-transfer,ICt),从而实现了荧光发射从紫光(363nm)到浅蓝光(476nm)的有效调控。
Organic fluorescent materials have been widely studied and become the hot research topic in the fields of material science and organic electronics due to easy tunable to get desired properties for specific application.In this study,three organic fluorescent molecules of 1,4-asymmetric phenyl system 1-3 with controllable luminescent color and highefficiency luminescence were described.The D-A type target compounds 1-3 were designed by connecting the electrondonating group(D)such as phenothiazine,benzoxazole or 4,4-dimethoxydiphenylamine at the 4-positions with electronaccepting group(A),cyano group at the 1-positions,respectively.The photophysical properties were further measured by UV-Vis,fluorescence spectroscopy and theoretical calculation.The study showed that by changing the substituent’s at 1,4-positions,the HOMO-LUMO energy levels of the molecules is effectively disturbed,the electron distribution of the material is regulated and the intramolecular charge coupling is increased.The fluorescent color shifted from purple(363 nm)to light blue(476 nm).
作者
胡真
汪青松
陈彦
黄伟岸
Md.Monarul Islam
冯星
Shofiur Rahman
Abdullah Alodhayb
安粒
吴福根
HU Zhen;WANG Qing-song;CHEN Yan;HUANG Wei-an;ISLAM Md.Monarul;FENG Xing;RAHMAN Shofiur;ALODHAYB Abdullah;AN Li;WU Fu-gen(College of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China;King Abdullah Institute for Nanotechnology,King Saudi University,Riyadh,Saudi Arabia;School of Printing and Packaging Engineering,Beijing Institute of Graphic Communication,Beijing 102600,China)
出处
《数字印刷》
北大核心
2019年第4期94-100,108,共8页
Digital Printing
关键词
有机荧光材料
推拉电子结构
分子内电荷转移
荧光调控
理论计算
Organic fluorescent material
D-A electronic structure
Intramolecular charge transfer
Fluorescence regulation
theoretical calculation
