Copper complexes luminescent

Special features strongly related to the compactness of the phenylene-bridged knots were also observed during the photophysical studies. All die compounds, as usual for copper complexes with phenanthroline-type ligands [116, 117], exhibit MLCT luminescence in CH2C12 at room temperature. Only one emission band, assigned to the lowest MLCT excited state, is observed even for the complexes con-... 

Reviews have appeared of the photochemistry of copper complexes, the luminescence properties of copper(i) compounds, and of the mutual influence of ligands in co-ordination complexes. 

Luminescence Wavelengths and Energy Level Structure of Dinuclear Copper Complexes and Related Metal Complexes... 

Ozawa et al. have performed crystal structural analyses on these dinuclear copper complexes in the excited state while irradiating the crystal with CW laser [6]. In their experiment, the interatomic distance between the two copper atoms is almost the same, whereas that between the two bromine atoms is shortened in the excited state. The structural change is reported to be about 10 %. In the excited state, the electron in the copper 3d orbital slightly moved outside from the Cu2Br2 unit plane due to MLCT. Thus, the intermolecular distance between the two bromine atoms is shortened due to the expansion of the two copper atomic orbitals. Luminescence can be explained by the electron in the ligand molecular orbital dropping into the copper 3d and bromine 4p orbitals. 

The studies on copper complexes demonstrated that the phanephos ligand (see Fig. 2) can be successfully applied to engineer highly luminescent Cu(i) complexes. The rigid [Cu(dmp)(phanephos)] complex displays a high luminescence quantum yield of 0.8 at ambient temperature. In contrast to the long-lived phosphorescence of 240 ps at low temperature, the ambient-temperature emission represents a thermally activated delayed fluorescence with a decay time of 14 ps. ... 

A series of homoleptic copper(i), silver(i), and gold(i) complexes of two bisphosphine ligands l,2-bis(diphenylphosphino)benzene, dppb bis[2-(diphenylphosphino)phenyl]ether, POP has been studied to demonstrate that these species are very low emissive in solution but highly luminescent in the solid state. In particular, the silver and copper complexes afford quite broad electroluminescence spectra with white light emission when used in the fabrication of light-emitting devices. ... 

Alkynyl complexes contain metal-carbon bonds in which the metal is bound to the sp-hybridized carbon at the terminus of a metal-carbon triple bond. The materials properties of these complexes have been investigated extensively. The properties of these complexes include luminescence, optical nonlinearity, electrical conductivity, and liquid crystallinity. These properties derive largely from the extensive overlap of the metal orbitals with the ir-orbitals on the alkynyl ligand. The M-C bonds in alkynyl complexes appear to be considerably stronger than those in methyl, phenyl, or vinyl complexes. Alkynyl complexes are sometimes prepared from acetylide anions generated from terminal alkynes and lithium bases (e.g., method A in Equation 3.42), but the acidity of alkynyl C-H bonds, particularly after coordination of the alkyne to the transition metal, makes it possible to form alkynyl complexes from alkynes and relatively weak bases (e.g., method B in Equation 3.42). Alkynyl copper complexes are easily prepared and often used to make alkynylnickel, -palladium, or -platinum complexes by transmetallation (Equation 3.43). This reaction is a step in the preparation of Ni, Pd, or Pt alkynyl complexes from an alkyne, base, and a catalytic amoimt of Cul (Equation 3.44). This protocol for... 

Different types of DNA have been used to probe the binding interactions of copper(I) complexes. Luminescence data obtained from this study indicate that a guanine-cytosine base pair is sufficient to define an intercalation site. ... 

Regarding copper, Tsubomura reported in 2009 the first example of a luminescent dinuclear copper complex, having two methylene-bridged diimidazol-2,2 -diylidene ligands at the moment, this complex represents the only example of luminescent copper complex with a di-NHC ligand. 

THE DETERMINATION OF COPPER MICROAMOUNTS ON THE TERBIUM LUMINESCENCE SENSITIZED BY IT IN HETEROBINUCLEAR COMPLEX... 

Li, D., Che, C.-M., Kwong, H.-L. and Yam, V.W.-W. (1992) Photoinduced C-C bond formation from alkyl halides catalysed by luminescent dinuclear gold(I) and copper(l) complexes. Journal of the Chemical Society, Dalton Transactions, 3325-3329. 

Syntheses and luminescence studies of mixed-metal gold(I)-copper(l) and -silver (I) alkynyl complexes. The tuming-on of emission upon d metal ion encapsulation. Dalton Transactions, 1830-1835. 

The aim of this chapter is to review the chemistry of chalcogenolates in the last 10 years. The more recent reviews in this field included chalcogenolates of the s-block elements,13,14 early transition metal thiolates,15 metal complexes with selenolate and tellurolate ligands,16 copper(I), lithium and magnesium thiolates,17 functionalized thiolate complexes,18 19 pentafluorobenzenethiolate platinum group compounds,20 tellurium derivatives,21 luminescent gold compounds,22 and complexes with lanthanide or actinide.23... 

Y Ma, CM Che, HY Chao, X Zhou, WH Chan, and J Shen, High luminescence gold(I) and copper(I) complexes with a triplet excited state for use in light-emitting diodes, Adv. Mater., 11 852-857, 1999. 

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