高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (10): 20220210.doi: 10.7503/cjcu20220210

• 有机化学 • 上一篇    下一篇

一种基于二氢吩嗪的三维共价有机框架的合成、 结构与表征

王凯旋, 黎子平, 陈先阳, 崔勇()   

  1. 上海交通大学化学化工学院, 上海 200240
  • 收稿日期:2022-04-04 出版日期:2022-10-10 发布日期:2022-04-28
  • 通讯作者: 崔勇 E-mail:yongcui@sjtu.edu.cn
  • 基金资助:
    国家自然科学基金(91851204);国家重点研发计划项目(2021YFA1200302)

Synthesis, Structure and Characterization of a Dihydrophenazine Based 3D Covalent Organic Framework

WANG Kaixuan, LI Ziping, CHEN Xianyang, CUI Yong()   

  1. School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China
  • Received:2022-04-04 Online:2022-10-10 Published:2022-04-28
  • Contact: CUI Yong E-mail:yongcui@sjtu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(91851204);the National Key Research and Development Program of China(2021YFA1200302)

摘要:

二氢吩嗪衍生物由于其独特的氧化还原活性而备受关注. 本文先设计合成了一种含有二氢吩嗪基团的单体5,10-二(4-甲酰基苯基)-5,10-二氢吩嗪(M1), 再采用溶剂热法, 通过亚胺缩合反应制备了一种新型三维共价有机框架(3D COF, 3D-PN-2). 通过粉末X射线衍射(PXRD)、 氮气吸附-脱附、 傅里叶变换红外光谱(FTIR)和固体碳核磁共振波谱(13C CP/MAS NMR)等表征方法, 并结合理论模拟对其结构信息进行了研究, 得出3D-PN-2是具有十一重穿插金刚石(dia)拓扑结构的3D COF. 采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对其形貌进行了表征. 稳定性研究结果表明, 3D-PN-2具有较好的热稳定性和化学稳定性. 通过固体紫外-可见漫反射光谱研究了3D-PN-2的光吸收性能, 结果表明, 其在紫外和可见光区具有较宽的吸收范围(吸收边为 630 nm), 且具有较窄的能带间隙(2.11 eV). 通过循环伏安法研究了其氧化还原性能, 并计算得出其最高占有轨道能级(EHOMO)为-4.50 eV, 最低空轨道能级(ELUMO)为-2.39 eV.

关键词: 共价有机框架, 二氢吩嗪, 多孔材料

Abstract:

Dihydrophenazine derivatives have received considerable attention due to their unique redox activity. In this paper, a dihydrophenazine based monomer 5,10-di(4-formylphenyl)-5,10-dihydrophenazine(M1) was designed and synthesized, and 3D-PN-2 was then prepared with a Schiff-base reaction by the combination of M1 and tetrakis(4-aminophenyl)methane(TAM). 3D-PN-2 was characterized by powder X-ray diffraction(PXRD), nitrogen adsorption-desorption experiment, FTIR, 13C CP/MAS NMR, SEM and TEM. After combined with theoretical simulation, 3D-PN-2 was identified as a three-dimensional covalent organic framework(3D COF) with an 11-fold interpenetrated dia topology. Subsequent studies showed that 3D-PN-2 had good thermal and chemical stability. The optical absorption property of 3D-PN-2 was studied by UV-Vis diffuse reflectance spectrum. 3D-PN-2 exhibits broad absorption in the region from UV to visible light(absorption edge: 630 nm), and the band gap of 3D-PN-2 is 2.11 eV. The redox property was studied by cyclic voltammetry, and the highest occupied molecular orbital(EHOMO) and lowest unoccupied molecular orbital(ELUMO) were calculated to be -4.50 and -2.39 eV, respectively. These results suggest that 3D-PN-2 will be a promising COF candidate for photocatalysis applications.

Key words: Covalent organic framework(COF), Dihydrophenazine, Porous material

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