Issue 29, 2024

Guest selectivity of [Ni2] supramolecular helicates

Abstract

Two new paramagnetic supramolecular helicates with the formula (X@[Ni2L3])3+ (X = Cl, or Br; L = a bis-pyrazolylpyridine ligand) have been prepared and are described. Helicates of this metal are very rare with virtually no prior examples of them acting as hosts of anionic species. The persistence of the new assemblies in solution has been demonstrated unambiguously by mass spectrometry and paramagnetic 1H NMR. This has allowed us to establish the preference of the coordination [Ni2] host for Cl over Br, in agreement with DFT calculations. These results show the promise of the use of metallohelicates as suitable systems for the selective encapsulation of specific anions in solution.

Graphical abstract: Guest selectivity of [Ni2] supramolecular helicates

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2024
Accepted
28 Jun 2024
First published
29 Jun 2024
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2024,53, 12301-12306

Guest selectivity of [Ni2] supramolecular helicates

M. Imperato, A. Nicolini, J. Ribas-Ariño, M. Antkowiak, O. Roubeau, A. Cornia, V. Novikov, L. A. Barrios and G. Aromí, Dalton Trans., 2024, 53, 12301 DOI: 10.1039/D4DT01611D

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