Bottom-Up Construction and Reversible Structural Transformation of Supramolecular Isomers based on Large Truncated Tetrahedra.
Angew Chem Int Ed Engl
; 58(3): 780-784, 2019 Jan 14.
Article
in En
| MEDLINE
| ID: mdl-30475444
ABSTRACT
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 842â
Å3 ), 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 0.174â
g cm-3 with 1D channels (ca. 5.4â
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-ß, the cell volume is only 15 513â
Å3 . The packing mode of tetrahedra is corner-to-face, giving rise to a high-density architecture (1.324â
g cm-3 ; channel 0.8â
nm). Supramolecular structural transformation between VMOP-α and VMOP-ß 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.
Full text:
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Angew Chem Int Ed Engl
Year:
2019
Type:
Article