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Triple Self-Sorting in Constitutional Dynamic Networks: Parallel Generation of Cu(I), Fe(II) and Zn(II) Imine-Based Metal Complexes

preprint
submitted on 30.09.2019 and posted on 01.10.2019 by Jean-François Ayme, Sébastien Dhers, Jean-Marie Lehn
Three imine-based metal complexes, having no overlap in terms of their compositions, have been simultaneously generated from the self-sorting of a constitutional dynamic library (CDL) containing three amines, three aldehydes and three metal salts. The hierarchical ordering of the stability of three metal complexes assembled and the leveraging of the antagonistic and agonistic relationships existing between the constituents within the constitutional dynamic network corresponding to the CDL were pivotal in achieving the desired sorting. The mechanism and the driving forces underlying the self-sorting process have been studied by NMR. The self-sorting of the Fe(II) and Zn(II) complexes was found to depend on an interplay between the thermodynamic driving forces and a kinetic trap involved in their assembling. These results also exemplify the concept of “simplexity” –the fact that the output of a self-assembling system may be simplified by increasing its initial compositional complexity—as the two complexes could self-sort only in the presence of the third pair of organic components, those of the Cu(I) complex.

Funding

Advanced Research Grant SUPRADAPT 290585 Marie Skłodowska-Curie grant agreement No 749351.

History

Email Address of Submitting Author

lehn@unistra.fr

Institution

Université de Strasbourg - ISIS

Country

FRANCE

ORCID For Submitting Author

0000-0001-8981-4593

Declaration of Conflict of Interest

no conflict of interest

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