新型氟代三苯胺衍生物的合成和光谱特性研究

设计和合成了一种新型氟代三苯胺衍生物——N,N,N′,N′-四苯基-2′,2″,3′,3″,5′,5″,6′,6″-八氟对四联苯]-4,4″′-二胺(OFTPA)。通过元素分析、熔点测定、红外光谱和1 H NMR谱等手段对OFTPA的分子结构进行了表征,并对其主要的红外光谱吸收峰和1 H NMR谱带进行了归属分析。利用紫外-可见吸收光谱、荧光光谱和循环伏安法(CV)对OFTPA的电子能级结构和发光性能进行了研究。紫外-可见吸收光谱测定结果表明,OFTPA薄膜的最大吸收峰波长为355nm,光学带隙(Eg)为3.09eV。荧光光谱测定结果表明,OFTPA薄膜在365nm紫外光的激发下,产生发光峰波长在448nm附近、半峰宽(FWHM)为68nm的蓝光发射,色纯度高,有望成为优良的蓝光发射材料。循环伏安法测定结果表明,OFTPA的最高占有轨道(HOMO)能级为-5.41eV,最低空轨道(LUMO)能级为-2.32eV,具有良好的空穴传输性能。研究结果为进一步研究其在有机光电器件中的应用提供了参考。

Synthesis and spectral properties of a novel fluorinated triphenylamine derivative

A novel fluorinated triphenylamine derivative, N,N,N',N'-tetraphenyl-2', 2", 3', 3", 5', 5", 6', 6"octafluoro-p-quater-phenyl]-4,4"'-diamine (OFTPA), was designed and synthesized via the palladium-catalyzed Suzuki coupling reaction of 4,4'-di-bromooctafluorobiphenyl with triphenylamine-4-boronic acid (yield: 67%). Its molecular structure was characterized by elemental analysis, melting points, FTIR and 1H NMR spectroscopy, and the main FTIR absorption peaks and 1H NMR spectral bands of the compound were assigned. The energy level structure and photoluminescence properties of OFTPA were investigated by UV-Vis absorption, fluorescence spectroscopy and cyclic voltammetry (CV). The UV-Vis spectroscopy results show that the maximum absorption peak wavelength of OFTPA film is 355 nm, and its optical band gap (E(g)) determined from the obtained absorption spectra is 3.09 eV. The fluorescence spectroscopy results show that OFTPA film can emit intense blue fluorescence with a peak wavelength of 448 nm and a full width at half maximum (FWHM) of 68 nm under UV excitation at 365 nm. So it is a promising candidate for blue electroluminescent materials. The CV results show that the highest occupied molecular orbital (HOMO) energy level and the lowest unoccupied molecular orbital (LUMO) energy level of OFTPA are -5.41 and -2.32 eV, respectively, indicating that it has good hole transport property. The results give a reference to further application to organic optoelectronic device of the target compound.