2-甲基-7-苯并咪唑基螺二芴的合成及性能研究

Synthesis and Properties of 2-(2-Methyl-9,9'-Spirobi[Fluoren]-7-yl)-1H-Benzo [d]Imidazole

以对溴甲苯为原料,通过偶联反应、溴化、格氏反应、脱水成环反应和氧化反应得到2-甲基-7-甲酰基螺二芴,再与邻苯二胺反应得到标题化合物(SPF-MB),原料廉价易得,合成路线简单且产率较高。SPF-MB由于引入了螺二芴的三维刚性结构,具有高的荧光量子产率和好的溶解性。热分解温度T d为204.5℃。在电致发光及离子探针领域具有很好的应用前景。用于电致发光领域,将其作为发光层制备成电致发光器件,可得到色坐标为(0.293,0.307)的白光。用于荧光离子探针具有高的灵敏性,对溶液pH的响应非常迅速,是一种具有宽泛响应范围的pH探针。

A novel spirobifluorene derivative, 2-（2-methyl- 9,9＇-spirobi [ fluoren ]-7-yl ）-1H-benzo [ d] imidazole （ SPF- MB） was synthesized starting from the readily available rea- gent 1-bromo-4-methylbenzene. The linear absorption,fluorescence and thermal properties were investigated. The Td of SPF-MB reaches 204.5℃. SPF-MB showes excellent spectral sensitivities to pH changes and can be used as optical pH sensor of a wide pH range. The electroluminescent properties of SPF-MB is demonstrated with a device configuration of ITO/MoO3 （6 nm）/NPB （ 80 nm ）/EML （ 30 nm）/TPBI （40 rim）/LiF （ 1 nm ）/A1 （ 100 nm ）. Notably, the device of SPF-MB has a white emission with CIE coordinates （0. 293, 0. 307 ）.