有机化学 ›› 2020, Vol. 40 ›› Issue (9): 2879-2887.DOI: 10.6023/cjoc202005005 上一篇    下一篇

研究论文

硼氮[4]螺烯的合成、表征及光物理性质研究

刘秉康a, 张艳丽a, 陈瑜a, 刘旭光a,c, 张磊b   

  1. a 天津理工大学化学化工学院 天津市有机太阳能电池和光化学转换重点实验室&天津市药物靶向与生物成像重点实验室 天津 300384;
    b 天津城建大学理学院 天津 300384;
    c 中国科学院上海有机化学研究所 有机功能分子合成与组装化学重点实验室 上海 200032
  • 收稿日期:2020-05-03 修回日期:2020-06-05 发布日期:2020-06-20
  • 通讯作者: 刘旭光, 张磊 E-mail:xuguangliu@tjut.edu.cn;zhanglei-chem@tcu.edu.cn
  • 基金资助:
    国家自然科学基金(No.21502140)、天津市自然科学基金(No.17JCZDJC37700)和有机功能分子合成与组装化学重点实验室开放课题(No.K2015-10)资助项目.

Synthesis, Characterization and Photophysical Properties of BN-[4]helicenes

Liu Bingkanga, Zhang Yanlia, Chen Yua, Liu Xuguanga,c, Zhang Leib   

  1. a Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion & Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384;
    b School of Science, Tianjin Chengjian University, Tianjin 300384;
    c Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032
  • Received:2020-05-03 Revised:2020-06-05 Published:2020-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (No. 21502140), the Natural Science Foundation of Tianjin City (No. 17JCZDJC37700), and the Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules (No. K2015-10).

将多环芳烃中的碳碳双键替换成等电子体和等结构体的硼氮键是有效调节多环芳烃光物理性质的手段之一,已成为有机材料领域研究的热点.文献中报道的多是平面型的硼氮芳烃分子,非平面的硼氮芳烃研究相对较少.本工作研究了两个系列非平面的硼氮[4]螺烯分子的合成和性质,通过Suzuki偶联、亲电芳香硼化及亲核取代反应,简洁地合成了目标分子,并通过1H NMR、13C NMR和11B NMR等表征.单晶结构表明硼氮[4]螺烯具有螺烯的特征螺旋结构.结合理论计算对硼氮[4]螺烯的芳香性进行了定性定量分析,发现硼氮[4]螺烯的硼氮子环具有弱的芳香性.光物理研究表明,硼氮[4]螺烯相对于全碳螺烯,表现出了显著的红移吸收光谱和轻微的蓝移发射光谱,以及较高的荧光量子产率.

关键词: 芳烃, 硼氮杂环, 螺烯,

Repalcement of C=C bond with an isoeletronic and isosturctural B—N bond is an effective way to tune the photophyscial properties of polycylic aromatic hydrocarbons (PAHs), which have become the hot topic in the filed of optoelectronics. There are relatively smalll number of the non-planar BN-PAHs exsited, compared to the large number of planar BN-PAHs being synthesized. In this paper, the synthesis and properties of two series of non-planar BN[4]helicenes are discribed. The synthesis is quite straightforward by sequence of Suzuki cross coupling reaction, electrophilic borylation and nuleophilic substitution reactions. All of the target BN-[4]helicenes were characterized by 1H NMR, 13C NMR and 11B NMR. One of the BN-[4]helicene was also unmbigiously confired by X-ray crystal analysis, which showed the typical helically twisted geometries. Futhermore, the BC4N ring in the BN[4]helicene exhibited weak aromaticites, wihch were quantitified by experimental and theorectical calculations. Furthermore, both of the two series of BN[4]helicene showed significant redshift of their absorption spectra and slightly blueshift emission spectra comparing to the all-carbon [4]helicene analogue. Also, good fluorescence quantum yields range from 0.42 to 0.70 were obtained for the two series of BN[4]helicenes.

Key words: arenes/aromatics, boron/nitrogen heterocycle, helicene, boron