具有光学性能的含芴聚亚胺酮的合成与表征

Synthesis and Characterization of the Optical Polymers Fluorene-Based Poly(Imino Ketone)s

以含芴芳香二胺和2,7-二溴-9-芴酮为单体,通过Buchwald-Hartwig交叉偶联反应缩聚合成了含芴聚亚胺酮(PIKF)。聚合物结构经核磁共振(1H-NMR)、红外光谱(FT-IR)及元素分析得以确认。通过凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)、热重分析(TG)和X射线衍射(XRD)等对其性能进行测试,结果表明该类聚合物具有较高的分子量(-Mw>3.0×104)以及良好的热稳定性(T5%>310℃),在40℃～350℃的范围内没有观测到玻璃化转变;XRD显示PIKF为无定型结构,因而具有良好的溶解性能。另外,利用紫外、荧光等对其光学性能进行了测试,在四氢呋喃(THF)中的UV-vis的最大吸收波长为271 nm和369 nm左右,最大荧光发射波长分别在445 nm和455 nm。

Fluorene-based poly（imino ketone）s（PIKF） were designed and synthesized by reacting 2,7-dibromo-9-fluorenone and 9,9-bis（3-R-4-aminophenyl）fluorene（R： H,CH3 or F）.The structure of PIKF was characterized by FT-IR,1H-NMR spectroscopy and elemental analysis.The results show the good agreement with the proposed structures.DSC results of PIKF show no detectable glass transition temperature in 40 ℃~350 ℃ and TGA measurement indicates that the polymers possess good thermal stability with high decomposition temperatures（T5%310 ℃）.It can be seen from the WAXD that PIKF possesses amorphous structures and also exhibits excellent solubility.In addition,the optical properties were studied,the UV-vis absorption spectrum of polymers exhibits two absorption peaks around 271 nm and 369 nm;The fluorescence spectrum of the PIKF-a,b and PIKF-c shows a maximum emission wavelength at 455 nm and 445 nm,respectively.