Symmetry-guided synthesis of highly porous metal-organic frameworks with fluorite topology.
Two stable, non-interpenetrated MOFs, PCN-521 and PCN-523, were synthesized by a symmetry-guided strategy. Augmentation of the 4-connected nodes in the fluorite structure with a rigid tetrahedral ligand and substitution of the 8-connected nodes by the Zr/Hf clusters yielded MOFs with large octahedral interstitial cavities. They are the first examples of Zr/Hf MOFs with tetrahedral linkers. PCN-521 has the largest BET surface area (3411 m(2) g(-1)), pore size (20.5×20.5×37.4 Å) and void volume (78.5%) of MOFs formed from tetrahedral ligands. This work not only demonstrates a successful implementation of rational design of MOFs with desired topology, but also provides a systematic way of constructing non-interpenetrated MOFs with high porosity.
Department of Chemistry, Texas A&M University, College Station, TX 77843 (USA) http://www.chem.tamu.edu/rgroup/zhou/
Muwei
M
Zhang
Ying-Pin
YP
Chen
Mathieu
M
Bosch
Thomas
T
Gentle
Kecheng
K
Wang
Dawei
D
Feng
Zhiyong U
ZU
Wang
Hong-Cai
HC
Zhou
adsorption; metal-organic frameworks; microporous materials; symmetry-guided design; zirconium