Vinylene-Bridged
Two-Dimensional Covalent Organic
Frameworks via Knoevenagel Condensation of Tricyanomesitylene
Posted on 2020-06-26 - 21:05
Vinylene-bridged
covalent organic frameworks (COFs) have shown
great potential for advanced applications because of their high chemical
stability and intriguing semiconducting properties. Exploring new
functional monomers available for the reticulation of vinylene-bridged
COFs and establishing effective reaction conditions are extremely
desired for enlarging the realm of this kind of material. In this
work, a series of vinylene-bridged two-dimensional (2D) COFs are synthesized
by Knoevenagel condensation of tricyanomesitylene with ditopic or
tritopic aromatic aldehydes. With use of appropriate secondary amines
as catalysts, high-crystalline vinylene-bridged COFs were achieved,
exhibiting long-range ordered structures, well-defined nanochannels,
high surface areas (up to 1231 m2 g–1), and excellent photophysical properties. Under a low loading amount
and short reaction time, they enable aerobic photocatalytic transformation
of arylboronic acids to phenols with high efficiency and excellent
recyclability. This work demonstrates a new functional monomer, tricyanomesitylene,
feasible for the general synthesis of vinylene-bridged COFs with potential
application in photocatalytic organic transformation, which instigates
further research on such kind of material.
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Bi, Shuai; Thiruvengadam, Palani; Wei, Shice; Zhang, Wenbei; Zhang, Fan; Gao, Lusha; et al. (2020). Vinylene-Bridged
Two-Dimensional Covalent Organic
Frameworks via Knoevenagel Condensation of Tricyanomesitylene. ACS Publications. Collection. https://doi.org/10.1021/jacs.0c04594
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AUTHORS (9)
SB
Shuai Bi
PT
Palani Thiruvengadam
SW
Shice Wei
WZ
Wenbei Zhang
FZ
Fan Zhang
LG
Lusha Gao
JX
Junsong Xu
DW
Dongqing Wu
JC
Jie-Sheng Chen