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Issue 28, 2017
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CrIII as an alternative to RuII in metallo-supramolecular chemistry

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Abstract

Compared to divalent ruthenium coordination complexes, which are widely exploited as parts of multi-component photonic devices, optically active trivalent chromium complexes are under-represented in multi-metallic supramolecular architectures performing energy conversion mainly because of the tricky preparation of stable heteroleptic CrIII building blocks. We herein propose some improvements with the synthesis of a novel family of kinetically inert heteroleptic bis-terdentate mononuclear complexes, which can be incorporated into dinuclear rod-like dyads as a proof-of-concept. The mechanism and magnitude of intermetallic Cr⋯Cr communication have been unraveled by a combination of magnetic, photophysical and thermodynamic investigations. Alternated aromatic/alkyne connectors provided by Sonogashira coupling reactions emerge as the most efficient wires for long-distance communication between two chromium centres bridged by Janus-type back-to-back bis-terdentate receptors.

Graphical abstract: CrIII as an alternative to RuII in metallo-supramolecular chemistry

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Supplementary files

Article information


Submitted
12 May 2017
Accepted
08 Jun 2017
First published
27 Jun 2017

This article is Open Access

Dalton Trans., 2017,46, 8992-9009
Article type
Paper

CrIII as an alternative to RuII in metallo-supramolecular chemistry

D. Zare, B. Doistau, H. Nozary, C. Besnard, L. Guénée, Y. Suffren, A. Pelé, A. Hauser and C. Piguet, Dalton Trans., 2017, 46, 8992
DOI: 10.1039/C7DT01747B

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