一种基于D-π-A型芴衍生物的合成、核磁共振谱及光谱性能研究  

Synthesis,NMR,and spectroscopic properties of a novel fluorene-based derivative with D-π-A structure

作　　者：张松 

机构地区：[1]山西省分析科学研究院,太原030006

出　　处：《功能材料》2014年第22期22079-22083,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(81372587)

摘　　要：合成了一种具有D-π-A 结构特征的新型芴衍生物：2-（2,4-二氟苯基）-7-（4-甲氧基苯基）-9,9-二辛基芴（1）.通过元素分析、红外光谱（IR）以及全面的-维核磁共振氢谱（1H NMR）、碳谱（13C{1H}NMR）、氟谱（19F{1H}NMR）对其结构进行了全面表征.通过优化反应物的投料顺序,得到较为合理的合成方法.详细分析了核磁共振谱谱线特征.利用紫外-可见吸收和荧光光谱研究了化合物的发光性能.结果表明,在CH2Cl2 溶液中,化合物1 在300-330nm 波段有吸收峰,归属于π-π＊跃迁;其光学带隙Eg 为3.39eV,发射峰值位于383nm,并且具有强烈的深蓝色荧光发射（激发波长为310 nm）,在CH2Cl2 溶液中量子效率达到0.70.此外,化合物1的吸收和发射光谱具有溶剂极性依耐性.A new type of fluorene derivative,2-(2,4-difluorophenyl)-7-(4-methoxyphenyl)-9,9-dioctylfluorene (compound 1)was synthesized and characterized by elemental analysis,IR spectra and NMR Spectroscopy.Its optoelectric properties were measured by UV-Vis absorption spectra and fluorescence spectra.The results show that compound 1 has low-energy absorption bands ranging from 350 nm to 400 nm in dichloromethane solution, which can be assigned to theπ-π? charge transfer transitions.The optical band gap (Eg )of compound 1 was estimated to be 3.39 eV.The title compound exhibits strong blue photoluminescence under 310 nm excitation at room temperature.The fluorescence quantum yields of compound 1 in CH2 Cl2 was up to 0.70.In addition,the wavelength of the absorption and emission spectra of compound 1 depend on the polarities of the solvents.

关 键 词：芴衍生物 合成 核磁共振 光谱性能 

分 类 号：TB332[一般工业技术—材料科学与工程]