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Efficient singlet oxygen generation by luminescent 2-(2?-thienyl)pyridyl cyclometalated platinum(II) complexes and their calixarene derivatives.

ABSTRACT: 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 ?556 and 598 nm in degassed acetonitrile and with emission quantum yield and lifetime of up to 0.38 and 26 ?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.

SUBMITTER: Lai SW

PROVIDER: S-EPMC3071644 | biostudies-literature | 2010 Nov-Dec

REPOSITORIES: biostudies-literature

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Efficient singlet oxygen generation by luminescent 2-(2′-thienyl)pyridyl cyclometalated platinum(II) complexes and their calixarene derivatives.

Lai Siu-Wai SW Liu Ying Y Zhang Dong D Wang Bin B Lok Chun-Nam CN Che Chi-Ming CM Selke Matthias M

Photochemistry and photobiology 20101101 6

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 ∼556 and 598 nm in degassed acetonitrile and with emission quantum yield and lifetime of up to 0.38 and 26 μs, respectively. These complexes are efficient photosensitizers of singlet oxygen with yields up to >90% ...[more]

PMID: 21155073

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