Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 14, Issue 24, Pages 7180-7185Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200800503
Keywords
conducting materials; coordination chemistry; dynamic covalent chemistry; self-assembly
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Funding
- Walters-Kundert Charitable Trust
- Swiss State Secretariat for Education and Research
- Swiss National Science Foundation [20EC21-112706, PP002-114828 200020-120007]
- US National Science Foundation [CHE-0610183]
- Academy of Finland [122350]
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We describe the preparation of a helicate containing four closely spaced, linearly arrayed copper(I) ions. This product may be prepared either directly by mixing copper(I) with a set of precursor amine and aldehyde subcomponents, or indirectly through the dimerization of a dicopper(I) helicate upon addition of 1,2-phenylenediamine. A notable feature of this helicate is that its length is not limited by the lengths of its precursor subcomponents: each of the two ligands wrapped around the four copper(I) centers contains one diamine, two dialdehyde, and two monoamine residues. This work thus paves the way for the preparation of longer oligo- and polymeric structures. DFT calculations and electrochemical measurements indicate a high degree of electronic delocalization among the metal ions forming the cores of the structures described herein, which may therefore be described as molecular wires.
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