Water-soluble, luminescent iridium(iii)-ytterbium(iii) complexes using dipyrido[3,2-a:2',3'-c]phenazine derivatives as bridging units |
| |
Authors: | Jennifer E Jones Robert L Jenkins Robin S Hicks Andrew J Hallett Simon J A Pope |
| |
Institution: | School of Chemistry, Main Building, Cardiff University, Park Place, Cardiff, Wales, UK. popesj@cardiff.ac.uk. |
| |
Abstract: | Amino-substituted dipyrido3,2-a:2',3'-c]phenazine (L(1)) and dimethyl-dipyrido3,2-a:2',3'-c]phenazine (L(2)) have been investigated as: (i) chromophores in cyclen-based ligands for lanthanide(iii) ions; (ii) ancillary co-ligands in cyclometalated iridium(iii) complexes; (iii) bridging, linker units in covalently linked, water-soluble bimetallic lanthanide(iii) iridium(iii) hybrid complexes. The dipyrido3,2-a:2',3'-c]phenazine (dppz) derivatives can act as sensitising chromophores (λ(ex) 400 nm) for Yb(iii), resulting in characteristic near-IR emission at 950-1050 nm. The incorporation of dppz-type ligands into cyclometalated Ir(III) complexes of the general type Ir(epqc)(2)(L(n))](PF(6)) (where epqc = ethylphenylquinoline carboxylate) gave luminescent species with solvent-sensitive emission properties. Steady state and time-resolved luminescence measurements on the water-soluble d-f hybrid species showed that Yb(III) can be sensitised using visible light. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|