1 research outputs found
Synthesis of 12-Connected Three-Dimensional Covalent Organic Framework with lnj Topology
The
structural exploration of three-dimensional covalent organic
frameworks (3D COFs) is of great significance to the development of
COF materials. Different from structurally diverse MOFs, which have
a variety of connectivity (3–24), now the valency of 3D COFs
is limited to only 4, 6, and 8. Therefore, the exploration of organic
building blocks with higher connectivity is a necessary path to broaden
the scope of 3D COF structures. Herein, for the first time, we have
designed and synthesized a 12-connected triptycene-based precursor
(triptycene-12-CHO) with 12 symmetrical distributions of aldehyde
groups, which is also the highest valency reported until now. Based
on this unique 12-connected structure, we have successfully prepared
a novel 3D COF with lnj topology (termed 3D-lnj-COF). The as-synthesized
3D COF exhibits honeycomb main pores and permanent porosity with a
Brunauer–Emmett–Teller surface area of 1159.6 m2 g–1. This work not only provides a strategy
for synthesizing precursors with a high connectivity but also provides
inspiration for enriching the variety of 3D COFs