Issue 1, 2023

Metal-directed self-assembly of constitutionally dynamic systems: control of the nuclearity of Pd(ii)/Pt(ii) metallacycles

Abstract

Self-assembly with the square-planar Pd(II) or Pt(II) (en)M(ONO2)2 (en = ethylenediamine) complexes of ditopic ligands incorporating both N,N′-dialkyl-4,4′-bipyridinium and N-monoalkyl-4,4′-bipyridinium or N-monoalkyl-2,7-diazapyrenium moieties leads to constitutionally dynamic systems responsive to the concentration of the components. At low concentrations, the metallamacrocyclic mononuclear [ML]5+ species is formed. In contrast, when the concentration is increased, a defined dinuclear [M2L2]10+ structure appears as a second species in equilibrium, becoming the major one at high concentrations. Besides concentration changes, the addition of an aromatic guest also allows the control of the system speciation, shifting the outcome of the metal-directed self-assembly towards the mononuclear metallacycle. This dynamic behavior enables the control of the nuclearity of the metallacycles assembled by external stimuli.

Graphical abstract: Metal-directed self-assembly of constitutionally dynamic systems: control of the nuclearity of Pd(ii)/Pt(ii) metallacycles

Supplementary files

Article information

Article type
Paper
Submitted
09 sept. 2022
Accepted
20 nov. 2022
First published
21 nov. 2022

Dalton Trans., 2023,52, 90-96

Metal-directed self-assembly of constitutionally dynamic systems: control of the nuclearity of Pd(II)/Pt(II) metallacycles

I. Neira, O. Domarco, T. Rama, V. Blanco, C. Peinador, M. D. García and J. M. Quintela, Dalton Trans., 2023, 52, 90 DOI: 10.1039/D2DT02955C

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