Angewandte Chemie International Edition
10.1002/anie.201801128
COMMUNICATION
along the x and y directions and ordering with 3.51 Å separation
in the z axis.
novel approach, highly crystalline pCTF-1 was synthesized with a
2
−1
high specific surface area (2034.1 m g ). At low pressure, the
pCTF-1 showed high CO and H uptake capacities (21.9 wt% at
73 K and 1.75 wt% at 77 K). Considering monomer availability
2
2
2 5
The P O -catalyzed pCTF-1 also exhibits superior sorbent
2
properties compared to the CTFs reported literatures (Table S2).
Figure 4a shows the nitrogen adsorption-desorption isotherm of
pCTF-1 at 77 K. The pCTF-1 exhibits a type-I isotherm, indicating
a microporous structure. The isotherm exhibits a sharp uptake in
and outstanding gas adsorption properties, this novel approach
for fabricating crystalline CTF can be a promising platform for
realizing more framework structures for better practical
applications.
0
the low-pressure region (P/P < 0.01), evidence of microporosity.
Using the Brunauer–Emmett–Teller (BET) method, the specific Experimental Section
surface area and total pore volume of the pCTF-1 were found to
Experimental Details.
be 2034.1 m2 g−1 and 1.04 cm g , respectively (Figure S14).
These values are comparable to many reported highly porous
organic networks (PONs) (Table S2).
3
−1
Synthesis, characterization of materials, and other additional details are
provided in the Supporting Information.
The pore size distribution of the pCTF-1 was derived using Acknowledgements
the nonlocal density functional theory (NLDFT) method. As shown
in the inset graph in Figure 4a, a narrow distribution of micropores
was centered at 1.0 nm.
This research was supported by the Creative Research Initiative
CRI, 2014R1A3A2069102), BK21 Plus (10Z20130011057),
Science Research Center (SRC, 2016R1A5A1009405) and Tech-
nology Development Program to Solve Climate Changes
(2016M1A2940910) programs through the National Research
Foundation (NRF) of Korea.
(
The narrow pore size distribution of pCTF-1 with high
crystallinity demonstrates that the polymer has well-defined
micropores, supporting reliable gas adsorption performance. The
microporous nature and the nitrogen-rich CTF prompted us to
explore its gas uptake properties.
Keywords: crystalline organic network • covalent triazine
framework • microporous materials • phosphorus pentoxide •
cyclotrimerization
As shown in Figure 4b, the CO
2
adsorption isotherm indicates
that pCTF-1 exhibits a high CO uptake of 21.9 wt% (4.98 mmol
2
−
1
3
−1
g , 110.77 cm g ) at 273 K and 1 bar compared to other
reported CTFs, and numerous reported PONs (Table S2). The
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2 5
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2 5
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P O
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2
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