Photoluminescent metal-(Bis) ligand complexes having different ligands
US6391648B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2000 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Feb 23, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F1/005
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photoluminescent complexes of copper, silver, zinc, lithium or similar metals are described, being (bis)ligand, with two different ligands. A variety of ligands may be used, the larger ligand being of a size or shape such that a pair of such ligand are prevented by steric properties from forming a (bis)ligand complex with the metal. Preferred substituents may be alkyl, aryl or alkaryl hydrocarbons, or halogen, chalcogen, nitrogen or phosphorus moieties, or included heteroatoms. Formation of the (bis)ligand complex is accomplished by maintaining the molar ratios of reactants at that which is equivalent to the (bis)ligand complex composition. The complexes are useful as optical sensors for O2, NH3 and NOx, in dye sensitization for photovoltaic devices/solar cells, in producing visible TiO2 photosensitization and in H2 production from the photochemically splitting water. These heteroleptic complexes exhibit photoluminescence equal to or better than ruthenium homoleptic complexes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.