新型含噻吩类衍生物的合成与光谱特性

Synthesis and Optical Properties of New Thiophene Derivatives

在四(三苯基膦)钯(Pd(PPh3)4催化作用下,通过催化偶合法可合成5,8-二噻基-萘基喹喔啉(DThQx(ace))和3,6-二噻基-哒嗪(DThPD)两种新型噻吩衍生物,同时也可合成了4,7-二噻基-2,1,3-苯并噻二唑(DThB)和1,4-二噻基-苯(DThPh),上述化合物产率分别为75%,78%,82%和67%。用红外光谱、核磁共振谱、元素分析等方法进行了表征,并对噻吩与不同芳香环构成的衍生物的紫外-可见吸收光谱和荧光光谱进行了对比研究。这四种化合物的紫外-可见吸收光谱中分别在435,336,446,325 nm处有最大吸收波长。其中DThQx(ace)、DThB和DThPh的荧光光谱中分别在564,568 nm和384 nm处观察到荧光,而DThPD无荧光。

Two new thiophene derivatives 5, 8-dithiophenyl-acenaphthenequinoxaline （DThQx （ace）） and 3, 6- dithiophenyl-pyridazine（DThPD） were prepared using tetra（triphenylphosphine） palladium （ Pd （ PPh3 ）4 ） as catalyst. 4, 7-Dithiophenyl-2, 1,3-benzothiadiazole （DThB） and 1,4-dithiophenyl-benzene （DThPh） were also obtained using this method. The yield of the above compounds were 75 %, 78 %, 82 % and 67 %, respectively. These compounds were characterized by FT IR, ^1H NMR and elemental analysis. UV-vis and photoluminescence properties of thiophene derivatives containing different aromatic rings in chloroform were studied. The UV-vis spectra of the compounds showed absorption peaks at about 435, 336, 446 nm and 325 nm, respectively. The emitted wavelengths of （DThQx（ace））, （DThB）, and （DThPh） were 564, 568 nm and 384 nm in the photoluminescence spectra. DThPD did not display any fluorescence.