A dinuclear extension to constrained heteroleptic Cu(I) systems
Citation:
Belén Gil, Gareth A. Cooke, Deanne Nolan, Gearóid M. Ó Máille, Sunil Varughese, Longsheng Wang and Sylvia M. Draper*, A dinuclear extension to constrained heteroleptic Cu(I) systems, Dalton Transactions, 40, 33, 2011, 8320 - 8327Download Item:
Abstract:
This article reports the synthesis and optical properties of three dinuclear, cationic copper complexes [Cu2(?-dppm)2(?-L)](NO3)2 (dppm diphenyldiphosphinomethane, L: LA 3,6-bis(2-pyridyl)-4,5-diphenyl-pyridazine, LB 3,6-bis(2-pyridyl)-4,5-di(4-pyridyl)-pyridazine and LC 3,6-bis(2-pyridyl)-8,9-diazafluoranthene). These were formed on the reaction of [Cu(?-dppm)(NO3)]2 with a series of N-donor (bppn) ligands L. The single crystal X-ray structures of [Cu2(?-dppm)2(?-L)](NO3)2?CH2Cl2 were determined and revealed that in both, the two copper atoms are held by three bridging ligands, two dppm ligands and one bppn ligand acting as a tetradentate bridge. The absorption spectra of the complexes present a MLCT [Cu ??*(N[logical and]N)] band in the ? 370?425 nm region. These new complexes exhibit red-orange MLCT-based emission in the solid-state with lifetimes in the microsecond range. In oxygen-free dichloromethane solution, the complex [Cu2(?-dppm)2(?-LC)]2+ has a long lifetime of 22.8 ?s. The long emission lifetimes are attributed to a rigid conformation that precludes the possible distortion of the copper in the excited state.
Sponsor
Grant Number
European Union (EU)
MKTD-CT04-014472
Science Foundation Ireland (SFI)
05PICAI819
Author's Homepage:
http://people.tcd.ie/smdraperDescription:
PUBLISHED
Author: DRAPER, SYLVIA
Sponsor:
European Union (EU)Science Foundation Ireland (SFI)
Type of material:
Journal ArticleCollections
Series/Report no:
Dalton Transactions40
33
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ChemistrySubject (TCD):
Nanoscience & Materials , Smart & Sustainable PlanetDOI:
http://dx.doi.org/10.1039/C1DT10275CMetadata
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