Abstract
In the present work, we report a simple, lower cost but highly efficient supramolecular approach for the sequence isolation of a number of metal cations. Namely, the cucurbit[10]uril-based smart supramolecular organic frameworks (SOFs). In the HCl medium, Q[10]-SOFs can coordinate to selected metal cations to form Q[10] -Mn+ precipitates, whereas the HNO3 medium can dissociate and extraction the selected metal cations from Q[10]-Mn+ complexes followed by precipitation free Q[10] due to the poor solubility of Q[10] in HNO3 solution. X-ray analysis revealed that the flexible and tunable porous size of Q[10]-based SOFs in different solvents, is the key factor led to these architectures being used as metal-selective materials.
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