The growth of three-dimensional covalent
organic frameworks (3D
COFs) with new topologies is still considered as a great challenge
due to limited availability of high-connectivity building units. Here
we report the design and synthesis of 3D triptycene-based COFs, termed
JUC-568 and JUC-569, following the deliberate symmetry-guided design
principle. By combining a triangular prism (6-connected) node with
a planar triangle (3-connected) or another triangular prism node,
the targeted COFs adopt non-interpenetrated ceq or acs topology, respectively. Both materials show permanent
porosity and impressive performance in the adsorption of CO2 (∼98 cm3/g at 273 K and 1 bar), CH4 (∼48 cm3/g at 273 K and 1 bar), and especially
H2 (up to 274 cm3/g or 2.45 wt % at 77 K and
1 bar), which is highest among porous organic materials reported to
date. This research thus provides a promising strategy for diversifying
3D COFs based on complex building blocks and promotes their potential
applications in energy storage and environment-related fields.