发布日期:2022/2/10 16:54:00

Covalent organic frameworks (COFs) are crystalline

 porous polymers with designable structures and prop-

 erties. Their crystallization typically relies on trial-

 and-error experimentation involving harsh conditions,

 including organic solvents, presenting signifificant

 obstacles for rational design and large-scale produc-

 tion. Herein, we present a liquid crystal-directed syn-

 thesis methodology and its implementation for up to

 gram-scale production of highly crystalline COFs in

 water and air. It is compatible with monomers of dif-

 ferent structures, shape, size, length of side chains, and

 electron-donating, electron-accepting, and heterocy-

 clic substitutions near reactive sites. Seventeen types

 of donor–acceptor two-dimensional COFs including

 four types of new ones and a three-dimensional COF

with a yield of up to 94% were demonstrated, showing

 great generality of the method. The as-synthesized

 donor–acceptor COFs are organic semiconductors

 and contain macropores besides intrinsic mesopores

 which make them attractive catalysts. The production

 of H2O2 under visible light in water was studied and the

structure–property relationships were revealed. The 
production rate reached 4347 μmol h−1 gcat−1 , which is 

about 467% better than that of the benchmark photo-

catalyst g-C3N4. This study will inspire the mild syn- 

thesis and scale-up of a wide spectrum of COFs and 

organic semiconductors as effificient catalysts, pro-

mote their structure–property investigation, and boost 

their applications.

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