Template Assembly of Metal Aggregates by Imino-Carboxylate Ligands

Doble, Dan M. J.; Benison, Colin H.; Blake, Alexander J.; Fenske, Dieter; Jackson, Matthew S.; Kay, Richard D.; Li, Wan‐Sheung; Schröder, Martin

doi:10.1002/(sici)1521-3773(19990712)38:13/14<1915::aid-anie1915>3.0.co;2-l

Cited by 88 publications

(19 citation statements)

References 7 publications

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“…Six Cu 2+ ions form an octahedron and a Na + ion is captured in the center. The edge distance (Cu ··· Cu distance) is 5.00 Å, compared with the edge distance of about 5.25 Å (Ni ··· Ni distance) in the reported lanthanide‐centered octahedral complexes [LnNi 6 AA 12 ]14,16 [LnNi 6 L 6 ] (L = 3,7‐diazanona‐2,7‐dien‐2,8‐dicarboxylato) 20. The Cu ··· Na distance is about 3.55 Å.…”

Section: Resultsmentioning

confidence: 78%

Synthesis, Structure, and Magnetic Properties of Three Chiral Sodium‐Centered Polynuclear Copper(II) Clusters with L‐Alanine

Xiang

Zhang

et al. 2008

Eur J Inorg Chem

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By controlling the reactant proportion, three sodium‐centered polynuclear octahedral copper(II)–amino acid clusters, [Na⊂{Cu6(Ala)8(H2O)(ClO4)}]·4ClO4·4H2O (1), Na[Na⊂{Cu6(Ala)8(ClO4)}]2·9ClO4·8H2O (2), and [Na⊂{Cu5(Ala)6(H2O)3}]n·5n(ClO4)·3n(H2O) (3) (Ala = L‐alanine), were synthesized. The structures were characterized by X‐ray structure analysis. The structure of 1 can be described as an octahedron formed with six copper atoms in which four Cu(Ala)2 ligands bridge two axial copper ions and capture one Na+ in the center of the cage and that of 2 as an octahedral dimer that is linked by two carboxylate oxygen atoms. Complex 3 is a chain composed of incomplete octahedron [NaCu5] units linked together by two carboxylate oxygen atoms. The magnetic susceptibility measurements indicate that all three clusters are ferromagnetic overall, although the intercluster interactions may be antiferromagnetic. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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Section: Resultsmentioning

confidence: 78%

Synthesis, Structure, and Magnetic Properties of Three Chiral Sodium‐Centered Polynuclear Copper(II) Clusters with L‐Alanine

Xiang

Zhang

et al. 2008

Eur J Inorg Chem

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“…interaction with hard metal cations [4,5]. We have become interested in the possibility of being able to 'switch' the mode of complex aggregation to that of hydrogen-bonding through the partial hydrolysis of one arm of [L 1 ] 3Ϫ to give the hexadentate ligand [L 2 ] 2Ϫ .…”

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confidence: 85%

“…One such strategy has involved the incorporation of groups onto the ligand periphery that are capable of forming intermolecular hydrogen-bonds with other substrate molecules [3]. Another approach has been to chelate metal ions with polychelate ligands that contain carboxylate ligands, facilitating the formation of aggregates via induzieren In 3ϩ und Fe 3ϩ die partielle Hydrolyse von [L 1 ] 3Ϫ unter Bildung der Komplexe [In(L 2 )Cl] und {[Fe(L 2 )] 2 O} ([L 2 ] 2Ϫ ϭ N[CH 2 CH 2 NH 2 ][CH 2 CH 2 NϭC(CH 3 )COOϪ] 2 ), die über intermolekulare Wasserstoffbrücken-Bindungen aggregieren.interaction with hard metal cations [4,5]. We have become interested in the possibility of being able to 'switch' the mode of complex aggregation to that of hydrogen-bonding through the partial hydrolysis of one arm of [L 1 ] 3Ϫ to give the hexadentate ligand [L 2 ] 2Ϫ .…”

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confidence: 99%

Effect of Partial Hydrolysis in Switching the Mode of Inter-molecular Bonding between Metal Complexes

Doble

Blake

Hibbs

et al. 2002

Z. anorg. allg. Chem.

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The assembly of [Cd(L 1 )] Ϫ {[L 1 ] 3Ϫ ϭ N[CH 2 CH 2 Nϭ C(CH 3 )COO Ϫ ] 3 } into the tetranuclear cluster {[Cd(L 1 )]Na-(H 2 O) 2 } 2 in the presence of Na ϩ is mediated by Na ϩ -carboxylate interactions; in contrast In 3ϩ and Fe 3ϩ induce the partial hydrolysis of [L 1 ] 3Ϫ to afford the complexes [In(L 2 )Cl] and {[Fe(L 2 )] 2 O} Der Effekt partieller Hydrolyse beim Wechsel der Art der intermolekularen Bindung zwischen Metall-Komplexen Inhaltsübersicht. Die Umwandlung von [Cd(L 1 )] Ϫ ([L 1 ] 3Ϫ ϭ N[CH 2 CH 2 NϭC(CH 3 )COOϪ] 3 ) in den vierkernigen Cluster {[Cd(L 1 )]Na(H 2 O) 2 } 2 in Anwesenheit von Na ϩ wird durch Na ϩ -Carboxylat-Wechselwirkungen vermittelt. Im Gegensatz hierzu Polymers and oligomers formed from metal complexes are currently the subject of much interest due to the possibility that such compounds may exhibit catalytic, magnetic, optical and conductivity properties [1]. Several strategies have been developed towards the assembly of such aggregates [2Ϫ5]. One such strategy has involved the incorporation of groups onto the ligand periphery that are capable of forming intermolecular hydrogen-bonds with other substrate molecules [3]. Another approach has been to chelate metal ions with polychelate ligands that contain carboxylate ligands, facilitating the formation of aggregates via induzieren In 3ϩ und Fe 3ϩ die partielle Hydrolyse von [L 1 ] 3Ϫ unter Bildung der Komplexe [In(L 2 )Cl] und {[Fe(L 2 )] 2 O} ([L 2 ] 2Ϫ ϭ N[CH 2 CH 2 NH 2 ][CH 2 CH 2 NϭC(CH 3 )COOϪ] 2 ), die über intermolekulare Wasserstoffbrücken-Bindungen aggregieren.interaction with hard metal cations [4,5]. We have become interested in the possibility of being able to 'switch' the mode of complex aggregation to that of hydrogen-bonding through the partial hydrolysis of one arm of [L 1 ] 3Ϫ to give the hexadentate ligand [L 2 ] 2Ϫ . There have been reports of the partial hydrolysis of Schiff-base ligands upon complexation with a metal centre [6Ϫ8] either to alleviate unfavourable steric interactions within the complex [7] or to form a ligand of improved donor ability [8]. Therefore, our approach to the synthesis of complexes of [L 2 ] 2Ϫ has been to investigate the reaction of [L 1 ] 3Ϫ with a range of metal ions of differing size and co-ordination requirements. The preliminary studies reported herein have utilised the metal ions In 3ϩ , Cd 2ϩ and Fe 3ϩ .Reaction of [L 1 ]Na 3 · 3H 2 O 1) with one molar equivalent of InCl 3 in MeOH results in the precipitation of irregular block shaped crystals. Single crystal X-ray diffraction re-1) [L 1 ]Na 3 · 3H 2 O is prepared via the Schiff-base condensation of tris(2-aminoethylamine) with three molar equivalents of sodium pyruvate in MeOH. Satisfactory elemental analytical data, mass spectra and infrared spectra were obtained for all compounds reported. Satisfactory 1 H and 13 C NMR spectra were obtained for [L 1 ]Na 3 · 3H 2 O, 1 and 2.

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“…For achieving these practice purposes, lots of crystal growth ways were adopted to organize different complex crystals [1], and several examples based on these complexes were closely related to our daily life [2,3]. Owing to the strong photoabsorption and excellent photoluminescence from pep conjugating configuration, benzimidazole complexes exhibited characteristics in organizing optical device [4].…”

Section: Introductionmentioning

confidence: 99%