摘要
To develop porous organic frameworks,precise control of the stacking manner of two-dimensional porous motifs and structural characterization of the resultant framework are important.From these points of view,porous molecular crystals formed through reversible intermolecular hydrogen bonds,such as;hydrogen-bonded organic frameworks(HOFs),can provide deep insight because of their high crystallinity,affording single-crystalline X-ray diffraction analysis.In this study,we demonstrate that the stacking manner of hydrogen-bonded hexagonal network(HexNet)sheets can be controlled by synchronizing a homological triangular macrocyclic tecton and a hydrogen-bonded cyclic supramolecular synthon called the phenylene triangle.A structure of the resultant HOF was crystallographically characterized and revealed to have a large channel aperture of 2.4 nm.The HOF also shows thermal stability up to 290°C,which is higher than that of the conventional HexNet frameworks.
基金
KAKENHI(JP21H01919,JP21K18961,JP22H05461,and JP23H04029)from MEXT/JSPS,Japan
I.H.thanks the Iketani Science and Technology Foundation and the Hoansha Foundation for their financial support.I.H.thanks the Multidisciplinary Research Laboratory System for Future Developments(MRL),Graduate School of Engineering Science,Osaka University
We thank Ms.R.Miyake for HR−MS analysis.X-ray diffraction data were collected at BL40XU in SPring-8 with approval of JASRI(proposal nos.2021A1080,2022B1151,and 2023A1264).
