Fully Conjugated Two‐Dimensional sp 2 ‐Carbon Covalent Organic Frameworks as Artificial Photosystem I with High Efficiency | Zendy

Zhao Yingjie | Zendy; Liu Hui | Zendy; Wu Chenyu | Zendy; Zhang Zhaohui | Zendy; Pan Qingyan | Zendy; Hu Fan | Zendy; Wang Ruiming | Zendy; Li Piwu | Zendy; Huang Xiaowen | Zendy; Li Zhibo | Zendy

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Fully Conjugated Two‐Dimensional sp 2 ‐Carbon Covalent Organic Frameworks as Artificial Photosystem I with High Efficiency

Author(s) -

Zhao Yingjie,

Liu Hui,

Wu Chenyu,

Zhang Zhaohui,

Pan Qingyan,

Hu Fan,

Wang Ruiming,

Li Piwu,

Huang Xiaowen,

Li Zhibo

Publication year - 2019

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.201901194

Subject(s) - conjugated system , covalent bond , stacking , materials science , covalent organic framework , carbon fibers , high resolution transmission electron microscopy , homo/lumo , band gap , crystallography , transmission electron microscopy , chemistry , nanotechnology , organic chemistry , molecule , composite number , optoelectronics , polymer , composite material

The synthesis of fully conjugated sp 2 ‐carbon covalent organic frameworks (COF) is extremely challenging given the difficulty of the formation of very stable carbon‐carbon double bonds (‐C=C‐). Here, we report the successful preparation of a 2D COF (TP‐COF) based on triazine as central planar units bridged by sp 2 ‐carbon linkers through the ‐C=C‐ condensation reaction. High‐resolution‐transmission electron microscopy (HRTEM) clearly confirmed the tessellated hexagonal pore structure with a pore center‐to‐center distance of 2 nm. Powder X‐ray diffraction (PXRD) together with structural simulations revealed an AA stacking mode of the obtained layered structure. TP‐COF turned out to be an excellent semiconductor material with a LUMO energy of −3.23 eV and a band gap of 2.36 eV. Excitingly, this novel sp 2 ‐carbon conjugated TP‐COF exhibited unprecedented coenzyme regeneration efficiency and can significantly boost the coenzyme‐assisted synthesis of l ‐glutamate to a record‐breaking 97 % yield within 12 minutes.

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