Two unusual copper complexes with nitrilotriacetate and 4,5-diazafluoren-9-one or trans-1,2-bis(4-pyridyl)ethylene mixed-ligands

Li, Baolong; Li, Baozong; Zhu, Xia; Zhang, Yong

doi:10.1016/j.inoche.2003.08.002

Inorganic Chemistry Communications

2003

DOI: 10.1016/j.inoche.2003.08.002

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Two unusual copper complexes with nitrilotriacetate and 4,5-diazafluoren-9-one or trans-1,2-bis(4-pyridyl)ethylene mixed-ligands

Baolong Li¹,

Baozong Li²,

Xia Zhu³

et al.

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Cited by 18 publications

References 23 publications

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Utilizing Reversible Copper(II) Peptide Coordination in a Sequence‐Selective Luminescent Receptor

Stadlbauer

Riechers

Späth

et al. 2008

Chemistry A European J

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Although vast information about the coordination ability of amino acids and peptides to metal ions is available, little use of this has been made in the rational design of selective peptide receptors. We have combined a copper(II) nitrilotriacetato (NTA) complex with an ammonium-ion-sensitive and luminescent benzocrown ether. This compound revealed micromolar affinities and selectivities for glycine- and histidine-containing sequences, which closely resembles those of copper(II) ion peptide binding: the two free coordination sites of the copper(II) NTA complex bind to imidazole and amido nitrogen atoms, replicating the initial coordination steps of non-complexed copper(II) ions. The benzocrown ether recognizes the N-terminal amino moiety intramolecularly, and the significantly increased emission intensity signals the binding event, because only if prior coordination of the peptide has taken place is the intramolecular ammonium ion-benzocrown ether interaction of sufficient strength in water to trigger an emission signal. Intermolecular ammonium ion-benzocrown ether binding is not observed. Isothermal titration calorimetry confirmed the binding constants derived from emission titrations. Thus, as deduced from peptide coordination studies, the combination of a truncated copper(II) coordination sphere and a luminescent benzocrown ether allows for the more rational design of sequence-selective peptide receptors.

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Utilizing Reversible Copper(II) Peptide Coordination in a Sequence‐Selective Luminescent Receptor

Stadlbauer

Riechers

Späth

et al. 2008

Chemistry A European J

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Cu(II), Ni(II), and Hg(II) thiocyanate complexes incorporating 4,5-diazafluoren-9-one: synthesis, spectroscopic characterization, X-ray studies, and magnetic properties

et al. 2011

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This article presents a combined experimental and computational study of the complexes [Cu(dafone) 2 (SCN) 2 ] (1), [Ni(dafone) 2 (SCN) 2 ] (2) and [Hg(dafone) (SCN) 2 ] (3), where dafone stands for 4,5-diazafluoren-9-one. The compounds have been studied by IR, UV-Vis spectroscopy, and single crystal X-ray diffraction. The electronic structures of these complexes have been calculated with the density functional theory (DFT) method. The spin-allowed electronic transitions of 1, 2, and 3 have been calculated with the time-dependent DFT method, and their UV-Vis spectra have been discussed on this basis.Keywords Copper(II) Á Nickel(II) Á Mercury(II) Á 4,5-Diazafluoren-9-one Á X-ray structure Á DFT calculations B. Machura (&) Á M. Wolff Á J. Palion Á A. Ś witlicka Á I. Nawrot

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Synthesis, structure and magnetic studies of two-dimensional network of Cu(II) polymer using malonate and 4,4′-azobispyridine ligands

Wang

Zhang

et al. 2005

Inorganica Chimica Acta

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Two unusual copper complexes with nitrilotriacetate and 4,5-diazafluoren-9-one or trans-1,2-bis(4-pyridyl)ethylene mixed-ligands

Cited by 18 publications

References 23 publications

Utilizing Reversible Copper(II) Peptide Coordination in a Sequence‐Selective Luminescent Receptor

Utilizing Reversible Copper(II) Peptide Coordination in a Sequence‐Selective Luminescent Receptor

Cu(II), Ni(II), and Hg(II) thiocyanate complexes incorporating 4,5-diazafluoren-9-one: synthesis, spectroscopic characterization, X-ray studies, and magnetic properties

Synthesis, structure and magnetic studies of two-dimensional network of Cu(II) polymer using malonate and 4,4′-azobispyridine ligands

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