Cuprophilicity: Spectroscopic and Structural Evidence for Cu−Cu Bonding Interactions in Luminescent Dinuclear Copper(I) Complexes with Bridging Diphosphane Ligands

Che, Chi‐Ming; Ming, Zhong; Miskowski, Vincent M.; Tse, Man-Chung; Chan, C. K.; Cheung, Kung‐Kai; Phillips, David Lee; Leung, King-Hung

doi:10.1002/1521-3773(20001117)39:22<4084::aid-anie4084>3.3.co;2-e

Cited by 38 publications

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“…10 When reduced to copper(I) state they can additionally provide long-lived electronically excited states, and exhibit intense luminescence. [11][12][13] The redox potential of acyclic and macrocyclic Schiff base complexes has deserved a strong interest since it seems to be directly related to some of the biologically important properties of this type of compounds. Mostly, Schiff-base copper complexes have been intensively investigated as enzyme mimics by their dioxygen binding ability, and catalytic activity in oxidative processes.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic characterization of schiff base-copper complexes immobilized in smectite clays

Dias¹,

Kinouti²,

Constantino³

et al. 2010

Quím. Nova

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Recebido em 5/7/10; aceito em 17/9/10; publicado na web em 25/10/10 Herein, the immobilization of some Schiff base-copper(II) complexes in smectite clays is described as a strategy for the heterogenization of homogeneous catalysts. The obtained materials were characterized by spectroscopic techniques, mostly UV/Vis, EPR, XANES and luminescence spectroscopy. SWy-2 and synthetic Laponite clays were used for the immobilization of two different complexes that have previously shown catalytic activity in the dismutation of superoxide radicals, and disproportionation of hydrogen peroxide. The obtained results indicated the occurrence of an intriguing intramolecular redox process involving copper and the imine ligand at the surface of the clays. These studies are supported by computational calculations.

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Section: Introductionmentioning

confidence: 99%

Spectroscopic characterization of schiff base-copper complexes immobilized in smectite clays

Dias¹,

Kinouti²,

Constantino³

et al. 2010

Quím. Nova

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“…Thus, in complex 2 with a polymeric structure built with copper atoms and nitrile ligands and without metal-metal interactions, only the high energy emission was detected, which appeared at similar wavelength than in the free ligand. This fact precludes a transition located in the pentaflourophenyl rings, a metal to ligand charge transfer or a copper centered emission, which should appear at higher wavelengths [9][10][11][12]. The similar behaviour of complex 1 is indicative of a similar structure and properties.…”

Section: Resultsmentioning

confidence: 99%

Solvent Induced Luminescence in Supramolecular Heterobimetallic Gold(I)-Copper(I) Complexes with a Bidentate Nitrile Ligand

Fernández¹,

Лагун²,

López‐de‐Luzuriaga³

et al. 2008

TOICJ

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In most cases this interest arises from the presence of metallophilic interactions which are usually responsible for the arrangements found in the solid state such as dimers, polymeric linear chains, 2D-sheets or 3D-networks. What is found in these cases is that the presence of Au(I)···M closed-shell interactions governs the structural dispositions found in the solid state. Also, many of these complexes display fascinating luminescent properties that are closely related to the presence of metallophilic interactions. Taking into account the heterometals, the ligands, the intermetallic distances and the number of metal-metal interactions it is possible to obtain complexes in which the luminescent properties vary from blue to red emissions and from fluorescent to phosphorescent emitters. In both examples the synthetic strategy is common but the heterometals, the ligands and the intermetallic interactions differ and are responsible for a different photoluminescent behaviour. In another example, a

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“…Some novel copper(I) complexes with paa and dcpm ligands have A novel triply bridged dinuclear four-coordinate Copper(I) Complex with sterically bulky bis(dicyclohexylphosphino)methane ligand also been synthesised. To the best of our knowledge, even though the copper(I) complexes with dcpm were extensively investigated [17][18][19], few tetra-coordination copper(I) complexes with dcpm ligands were reported so far due to the steric bulkiness and severe distorting involving some of the carbon atoms of the dcpm ligand. In this paper, the synthesis of a novel tetra-coordination Cu 2 (µ-paa)(µ-dcpm) 2 (BF 4 ) 2 is reported and its crystal structure and optical properties are studied in detail.…”

Section: Introductionmentioning

confidence: 94%

A novel triply bridged dinuclear four-coordinate copper(I) complex with sterically bulky bis(dicyclohexylphosphino)methane ligand

Yao¹,

Gan²,

Fu³

2008

Open Chemistry

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A novel triply bridged dinuclear four-coordinate Copper(I) Complex with sterically bulky bis(dicyclohexylphosphino)methane ligand * E-mail: wf_fu@yahoo.com.cn Abstract: A novel triply bridged dinuclear copper(I) complex: Cu 2 (µ-paa)(µ-dcpm) 2 (BF 4 ) 2 ·2CH 2 Cl 2 [ paa = pyridine-2-carbaldehyde azine (C 12 H 10 N 4 ) and dcpm = bis(dicyclohexylphosphino)methane(C 25 H 46 P 2 ) ] has been synthesized and structurally characterized. Crystallographic studies of the complex showed that two copper(I) ions were bridged by one paa ligand and two dcpm ligands. The paa ligand adopted the Z configuration at the partially double N-N bond and the two copper ions have distorted tetrahedral coordination geometry.Because of the steric effect of dcpm, the pyridine rings of the paa ligand are obviously not on the same plane (the dihedral angle is 43.61 0 ). The interaction between neighboring ligands results in a N-N bond length (1.374(7) Å) contraction. The UV-vis spectra of the complex exhibited intense high-energy absorptions at λ max < 340 nm and broad visible bands in a range of 380-550 nm, ascribed to intraligand (IL π-π*) transitions and metal-to-ligand charge-transfer (MLCT) transitions, respectively. Interestingly, the absorbtion peaks varied regularly with the solvent polarity. Although the complex has a rigid structure with the copper ions held firmly by triply bridged ligands, the emission and excitation spectra revealed that the complex exhibits weak fluorescence. Warsaw and Springer-Verlag Berlin Heidelberg. © Versita

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Cuprophilicity: Spectroscopic and Structural Evidence for Cu−Cu Bonding Interactions in Luminescent Dinuclear Copper(I) Complexes with Bridging Diphosphane Ligands

Cited by 38 publications

References 0 publications

Spectroscopic characterization of schiff base-copper complexes immobilized in smectite clays

Spectroscopic characterization of schiff base-copper complexes immobilized in smectite clays

Solvent Induced Luminescence in Supramolecular Heterobimetallic Gold(I)-Copper(I) Complexes with a Bidentate Nitrile Ligand

A novel triply bridged dinuclear four-coordinate copper(I) complex with sterically bulky bis(dicyclohexylphosphino)methane ligand

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