Premium
Bottom‐Up Construction and Reversible Structural Transformation of Supramolecular Isomers based on Large Truncated Tetrahedra
Author(s) -
Gong Yaru,
Zhang Yuteng,
Qin Chao,
Sun Chunyi,
Wang Xinlong,
Su Zhongmin
Publication year - 2019
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201811027
Subject(s) - tetrahedron , supramolecular chemistry , crystallography , polyhedron , volume (thermodynamics) , materials science , transformation (genetics) , chemistry , nanotechnology , crystal structure , geometry , thermodynamics , physics , mathematics , biochemistry , gene
A rational synthetic strategy to construct two supramolecular isomers based on polyoxovanadate organic polyhedra with tetrahedral symmetries is presented. VMOP‐α , a low‐temperature product, has an extremely large cell volume (470 842 Å 3 ), which is one of the top three for well‐defined MOPs. The corner‐to‐corner packing of tetrahedra leads to a quite low density of 0.174 g cm −3 with 1D channels (ca. 5.4 nm). The effective pore volume is up to 93.6 % of cell volume, nearly the largest found in MOPs. For the high‐temperature outcome, VMOP‐β , the cell volume is only 15 513 Å 3 . The packing mode of tetrahedra is corner‐to‐face, giving rise to a high‐density architecture (1.324 g cm −3 ; channel 0.8 nm). Supramolecular structural transformation between VMOP‐α and VMOP‐β can be reversibly achieved by temperature‐induced solvent‐mediated transformation. These findings give a good opportunity for understanding 3D supramolecular aggregation and crystal growth based on large molecular tectonics.