烷氧链对苯并硒二唑共轭分子光电性能的影响  

Effect of alkoxy on photoelectric performance of conjugated molecules composed of BseDZ

作　　者：程清[1] 文庆珍[1] 王紫潇 李红霞[1] 

机构地区：[1]海军工程大学理学院,武汉430033

出　　处：《海军工程大学学报》2015年第6期103-107,共5页Journal of Naval University of Engineering

摘　　要：以苯并硒二唑为电子受体、噻吩为电子给体,通过斯蒂尔偶联反应合成了两种有机共轭单体,并对其进行结构表征和光电性能测试。结果表明：在乙腈溶液和聚甲基丙烯酸甲酯薄膜中,共轭单体的紫外吸收波长范围宽,接枝烷氧链后单体的紫外吸收发生蓝移,表明烷氧链降低了共轭单体的电子亲和能力;荧光测得两种共轭单体在红光区域都有很强的发射峰,说明这两种分子是一类理想的红光材料;通过计算可知,两种单体同属于窄带隙（2.19~2.33eV）分子,它们在电化学测试过程中具有稳定的氧化还原特性,表明它们在有机光电等领域有潜在的应用价值。The organic conjugated molecules composed of the benzoselenadiazole（BseDZ） units as elec- tron acceptors and the thiophene groups as electron donors are prepared via the Stille coupling reaction for the structure characterization and test of their photoelectric properties. Either in acetonitrile solu- tion or in the PMMA films, the UV-vis spectroscopy shows that the molecules have a broad absorp- tion spectrum, and a blue shift appears after joining the alkoxy, which proves that alkoxy can reduce the electron affinity of conjugated monomer; the fluorescence spectra of target molecules exhibit strong emission peaks in the red-light regions, which indicates that target molecules are ideal red-light emission materials. The target molecules show a narrow band gap by calculation（2.19 to 2.33 eV） and exhibit the stable electrochemical property by cyclic voltammetry, which suggests that the mono- mers based on BseDZ unit will find a potential application in organic photoelectric fields.

关 键 词：窄带隙 发光材料 斯蒂尔偶联反应 烷氧基 

分 类 号：O633[理学—高分子化学]