Abstract
We describe an example of “interpenetration isomerism” in three-dimensional hydrogen-bonded organic frameworks. By exploiting the crystallization conditions for a peripherally extended triptycene H 6 PET, we can modulate the interpenetration of the assembled frameworks, yielding a two-fold interpenetrated structure PETHOF-1 and a five-fold interpenetrated structure PETHOF-2 as interpenetration isomers. In PETHOF-1, two individual nets are related by inversion symmetry and form an interwoven topology with a large guest-accessible volume of about 80 %. In PETHOF-2, five individual nets are related by translational symmetry and are stacked in an alternating fashion. The activated materials show permanent porosity with Brunauer-Emmett-Teller surface areas exceeding 1100 m 2 g −1 . Synthetic control over the framework interpenetration could serve as a new strategy to construct complex supramolecular architectures from simple organic building blocks.
| Original language | English |
|---|---|
| Pages (from-to) | 1664-1669 |
| Number of pages | 6 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 58 |
| Issue number | 6 |
| DOIs | |
| State | Published - Feb 4 2019 |
Funding
This research is part of the Joint Center of Excellence in Integrated Nano-Systems (JCIN) at King Abdulaziz City for Science and Technology (KACST) and Northwestern University (NU). The authors thank both KACST and NU for their continued support of this research. P.L. would like to thank Dr. Magdalena T. Owczarek and Dr. Minh T. Nguyen for helpful discussions, and Dr. Christos D. Malliakas for assistance with PXRD measurements. O.K.F and P.L. gratefully acknowledge the U.S. Department of Energy, National Nuclear Security Administration under Award Number DE-NA0003763. M.R.R. acknowledges the U.S. Department of Energy Office of Science (Basic Energy Sciences) for research funding and the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231 for access to supercomputing facilities.
| Funders | Funder number |
|---|---|
| National Energy Research Scientific Computing Center | DE-AC02-05CH11231 |
| U.S. Department of Energy Office of Science | |
| U.S. Department of Energy | |
| Basic Energy Sciences | |
| National Nuclear Security Administration | DE-NA0003763 |
| Northwestern University | |
| King Abdulaziz City for Science and Technology |
Keywords
- crystal engineering
- hydrogen-bonded organic frameworks
- interpenetration isomerism
- porous molecular solids
- supramolecular chemistry