基于meso-位置含有S原子的醌式Bisanthene衍生物的合成与性质表征
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国家自然科学基金(No. 21302043)资助项目;河南工业大学科技创新人才培育计划(2013CXRC10);河南工业大学高层次人才基金项目(2012BS051)


Synthesis, Characterization of meso-Position Sulfur embedded Quinoidal Bisanthene
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    摘要:

    本文拟在醌式Bisanthene的 meso-位置嵌入杂原子S,然后对其光电性质进行研究。以9-噻吨酮为原料分别合成相应的重氮化合物和硫酮,然后通过Barton-Kellogg反应,铜粉还原,分子内光照关环反应试图得到meso-位置含有S原子的醌式Bisanthene 1。由于单边关环产物7不具有均苯乙烯类结构骨架,导致该分子不能进一步发生Katz-modified Mallory光关环得到目标产物1。单边关环产物7和其烯烃前体6相比,表现出扩展的π体系,自身的最大吸收波长红移105 nm,发射波长红移90 nm。另外电化学测试表明7可以被可逆的氧化为阳离子,且被扩展的π体系所稳定。从单边关环产物7的光谱及电化学数据推测,目标产物1应该具有更大的π体系,更长范围的吸收及发射波长,较低的Eg、更多级的可逆氧化电位。

    Abstract:

    Quinoidal π-conjugation usually possess long-wavelength absorption and multistage redox properties which make it as promising organic electronic materials. In addition, incorporating heteroatoms into conjugated skeleton is an intriguing target because the introduction of heteroatoms would induce a variety of intermolecular interactions, such as van der Waals interactions and heteroatom-heteroatom interactions (S • • •S or Se• • • Se interactions), which is essential to achieve highly ordered supramolecular self-assembled structure and eventually excellent device performance. Herein, a facile route has been developed for the preparation of meso-position sulfur embedded quinoidal bisanthene 1. Thione 3 were prepared from corresponding thioxanthen-9-one via reaction with Lawesson’s reagent followed by the Barton-Kellogg reaction with 9-diazothioxanthene derived from corresponding hydrazine to afford the thioepoxides 5. The resulting compound 5 were then treated with copper powder to give the desired olefin precursor 6. Katz-modified Mallory photocyclization was carried out on 6 for the purpose to obtain the target molecule 1. The reaction was conducted by irradiation of the benzene solution of 6 with a 450 W medium-pressure mercury vapor lamp in the presence of I2 and propylene oxide. Unfortunately, only the partially cyclized product 7 were obtained in 77% yield. The reason leading to this result is that there is no more stilbene structure in compound 7. This partially cyclized product 7 showed extended π-conjugation compared with its olefin precursors 6 and exhibited 105 nm and 90 nm red shift of the corresponding absorption maxima and emission maxima. In addition, compound 7 can be oxidized into charged states which are stabilized by the delocalized π-system.

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李金玲.基于meso-位置含有S原子的醌式Bisanthene衍生物的合成与性质表征[J].精细化工,2016,33(3):

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  • 收稿日期:2015-11-30
  • 最后修改日期:2016-01-18
  • 录用日期:2016-01-21
  • 在线发布日期: 2016-02-04
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