| 초록 |
A cobalt (Co) supramolecular triple-stranded helicate-based ‘superb’-molecular cage, [[Co8(PDA)6(tbu-PTA)3(DMF)4(H2O)2]6-[Co(H2O)3]4] (1) (PDA = 2,6-pyridinedicarboxylate, tbu-PTA = 5-tert-butyl isophthalate, DMF = dimethylformamide), can be rationally designed through the multilevel coordination-driven assembly concept. The solid-state structure of 1 shows that it is composed of six triple-stranded helicates, which is generated through the ‘secondary’ assembly of Co-based clusters (primary assembly), interconnected through four linking CoII species. The discrete Co triple-stranded helicate supramolecules, Co8(PDA)6(tbu-PTA)3(DMF)6 (2) were also synthesized in a separated reaction. The solid-state structure of 2 shows that two distinct conformations, left- and right-handed, exist simultaneously in a single unit cell. Complex 1 showed much higher and more selective CO2 uptake properties compared to that of complex 2 and other discrete molecular platforms. |
