The DOI matches its Crossref record; 7 of the 7 references it cites were found in a registry or an index.
Bis-cyclometalated Ir(III) Complexes as Efficient Singlet Oxygen Sensitizers
Abstract
We report the singlet oxygen sensitization properties of a series of bis-cyclometalated Ir(III) complexes (i.e., (bt)2Ir(acac), (bsn)2Ir(acac), and (pq)2Ir(acac); bt = 2-phenylbenzothiazole, bsn = 2-(1-naphthyl)benzothiazole, pq = 2-phenylquinoline, and acac = acetylacetonate). Complexes with acetylacetonate ancillary ligands give singlet oxygen quantum yields near unity (PhiDelta = (0.7-1.0) +/- 0.1), whether exciting the ligand-based state or the lowest energy excited state (MLCT + 3LC). The singlet oxygen quenching rates for these beta-diketonate complexes were found to be small [(5 +/- 2) x 105 to (6 +/- 0.2) x 106 M-1 s-1], roughly 3 orders of magnitude slower than the corresponding phosphorescence quenching rate. Similar complexes were prepared with glycine or pyridine tethered to the Ir(III) center (i.e., (bsn)2Ir(gly) and (bt)2Ir(py)Cl; gly = glycine and py = pyridine). The glycine and pyridine derivatives give high singlet oxygen yields (PhiDelta = (0.7-1.0) +/- 0.1).
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Metadata
- Authors
- Gao, R., Ho, D. G., Hernandez, B., Selke, M., Murphy, D., Djurovich, P. I., & Thompson, M. E.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2002-11-23
- Volume
- 124
- Issue
- 50
- Pages
- 14828-14829
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2076984688
- Cited by
- 255
- References
- 7
- FWCI
- 9.46
- Type
- journal article
- Language
- en
- Open access
- closed
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