Allosteric deprogramming of a trinuclear heterometallic helicate

T. Riis-Johannessen, L.P. Harding, J.C. Jeffery, R. Moon, C.R. Rice

Research output: Contribution to journalArticle

Abstract

Two multidentate ditopic ligands L1 and L2 which contain both N-donor and crown ether units have been synthesised. The potentially octadentate ligand L1 forms a trinuclear heterometallic double helicate with Cu(I) and Zn(II) ([Zn2Cu(L1)2]5+), whereas L2 forms a tetranuclear heterometallic double helicate with the same metal ions ([Zn2Cu2(L2)2]6+). Both species have been characterised by 1H NMR, ESI-MS and single crystal X-ray crystallography. Reaction of [Zn2Cu2(L2)2]6+ with Ba2+ results in the coordination of the crown ether units giving the simple barium coordinated species [Zn2Cu2(L2)2Ba2]10+. However, reaction of [Zn2Cu(L1)2]5+ with Ba2+ deprograms the ligand and results in the formation of a mixture of species
LanguageEnglish
Pages1577-1587
Number of pages11
JournalDalton Transactions
Issue number16
DOIs
Publication statusPublished - Feb 2007

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Crown Ethers
Ligands
X ray crystallography
Barium
Metal ions
Nuclear magnetic resonance
Single crystals

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Riis-Johannessen, T. ; Harding, L.P. ; Jeffery, J.C. ; Moon, R. ; Rice, C.R. / Allosteric deprogramming of a trinuclear heterometallic helicate. In: Dalton Transactions. 2007 ; No. 16. pp. 1577-1587.
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Allosteric deprogramming of a trinuclear heterometallic helicate. / Riis-Johannessen, T.; Harding, L.P.; Jeffery, J.C.; Moon, R.; Rice, C.R.

In: Dalton Transactions, No. 16, 02.2007, p. 1577-1587.

Research output: Contribution to journalArticle

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AU - Riis-Johannessen, T.

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AB - Two multidentate ditopic ligands L1 and L2 which contain both N-donor and crown ether units have been synthesised. The potentially octadentate ligand L1 forms a trinuclear heterometallic double helicate with Cu(I) and Zn(II) ([Zn2Cu(L1)2]5+), whereas L2 forms a tetranuclear heterometallic double helicate with the same metal ions ([Zn2Cu2(L2)2]6+). Both species have been characterised by 1H NMR, ESI-MS and single crystal X-ray crystallography. Reaction of [Zn2Cu2(L2)2]6+ with Ba2+ results in the coordination of the crown ether units giving the simple barium coordinated species [Zn2Cu2(L2)2Ba2]10+. However, reaction of [Zn2Cu(L1)2]5+ with Ba2+ deprograms the ligand and results in the formation of a mixture of species

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