Journal
PHOTOCHEMISTRY AND PHOTOBIOLOGY
Volume 86, Issue 6, Pages 1414-1420Publisher
WILEY
DOI: 10.1111/j.1751-1097.2010.00809.x
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Funding
- Research Grant Council of the Hong Kong SAR, China [HKU 7030/06P]
- University of Hong Kong
- Chinese Academy of Sciences-Croucher Foundation
- National Natural Science Foundation of China/Research Grants Council [N_HKU 752/08]
- NIH-NIGMS [SC1GM084776]
- NSF CREST [NSF HRD-0932421]
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Luminescent cyclometalated platinum(II) complexes, namely [Pt(Thpy)(PPh3)X]n+ (HThpy = 2-(2'-thienyl)pyridine; X = Cl- (1), n = 0; X = CH3CN (2), pyridine (3), n = 1) and [Pt(Thpy)(HThpy)Y]n+ (Y = Cl- (4), n = 0; Y = pyridine (5), n = 1), exhibit structured emission with peak maximum at similar to 556 and 598 nm in degassed acetonitrile and with emission quantum yield and lifetime of up to 0.38 and 26 mu s, respectively. These complexes are efficient photosensitizers of singlet oxygen with yields up to > 90%. Complex 5 exhibited photocytotoxicity towards cancer cells and fluorescence microscopic images of cells incubated with 5 reveal substantial uptake at the nucleus and mitochondria.
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