Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27879
Title: Cuprophilic interactions in luminescent copper(I) clusters with bridging bis(dicyclohexylphosphino)methane and iodide ligands : spectroscopic and structural investigations
Authors: Fu, WF
Gan, X
Che, CM
Cao, QY
Zhou, ZY
Zhu, NNY
Keywords: Coordination chemistry
Copper
Luminescence
Metal-metal interactions
Polynuclear complexes
Issue Date: 2004
Publisher: Wiley-VCH
Source: Chemistry - a European journal, 2004, v. 10, no. 9, p. 2228-2236 How to cite?
Journal: Chemistry - a European journal 
Abstract: Polynuclear copper(I) complexes with bridging bis(dicyclohexylphosphino)methane (dcpm) and iodide ligands, [Cu2(dcpm)2(CH3CN)2](BF4)2 (1), [Cu2(dcpm)2](BF4)2 (2), [(CuI)3(dcpm)2] (3), [(CuI)4(dcpm)2] (4), and [(CuI)2(dcpm)2] (5) were prepared and their structures determined by X-ray crystal analysis. The shortest CuCu distance found in these complexes is 2.475(1) Å for 3. Powdered samples of 1, 3, 4, and 5 display intense and long-lived phosphorescence with λmax at 460, 626, 590, and 456 nm and emission quantum yields of 0.26, 0.11, 0.12, and 0.56 at room temperature, respectively. In the solid state, 2 displays both a weak emission at 377 and an intense one at 474 nm with an overall emission yield 0.42. The difference in emission properties among complexes 1–5 suggests that both CuCu interaction and coordination around the copper(I) center affect the excited state properties. A degassed solution of 2 in acetone gives a bright red emission with λmax at 625 nm at room temperature. The difference absorption spectra of the triplet excited states of 1–5 in acetonitrile show broad absorption peaks at 340–410 and 850–870 nm.
URI: http://hdl.handle.net/10397/27879
ISSN: 0947-6539
EISSN: 1521-3765
DOI: 10.1002/chem.200305657
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