新型含苯并磷杂环戊二烯结构荧光分子的合成及性能

Synthesis and Properties of Novel Benzo[b]phosphole Fluorescent Molecules

以三苯胺、咔唑为电子给体,苯并磷杂环戊二烯氧化物为电子受体,设计合成了一类新颖的D-A-D型荧光分子,其结构经1H NMR,13C NMR,31P NMR,IR和MS确认。通过紫外可见吸收光谱和荧光光谱系统研究了不同给体和受体单元对荧光分子的紫外吸收、液体荧光、固体荧光、溶致变色及聚集诱导发光等光物理性能的影响。结果表明:合成的三种分子具有良好的液体和固体荧光性能;化合物TBN-EPIO具有显著的溶致变色效应,在四氢呋喃-水二元溶剂体系中,具有聚集诱导发光(AIE)效应。此外,利用密度泛函理论计算了分子的几何构型及前线分子轨道电子云。

A new type of D-A-D fluorescent materials were designed and synthesized with triphenylamine and carbazole as electron donors and benzo[b]phosphole oxides as electron acceptors.Their structures were confirmed by 1H NMR,13C NMR,31P NMR,IR and MS.The effects of different donor and acceptor units on the photophysical properties of fluorescent molecules,such as UV absorption,liquid fluorescence,solid fluorescence,lyochromism and aggregation-induced emission,were studied by UV-Vis absorption spectroscopy and fluorescence spectroscopy.The results show that the molecules have good liquid and solid fluorescence properties;compounds TBN-EPIO have significant solvent discoloration effect and aggregation-induced emission(AIE)effect in tetrahydrofuran-H2O binary solvent system.In addition,the molecular geometry and frontier molecular orbital electron cloud are calculated by density functional theory.