Energy upconversion sensitized by a platinum(ii) terpyridyl acetylide complex
- 9 July 2010
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Science
- Vol. 1 (4) , 502-506
- https://doi.org/10.1039/c0sc00244e
Abstract
The platinum(II) terpyridine acetylide complex, [Pt(ttpy)(CCPh)]ClO4 (1, where ttpy = 4′-p-tolylterpyridine), sensitizes the 3π–π* excited state of 9,10-diphenylanthracene (DPA) that in turn produces upconverted fluorescence via triplet–triplet annihilation (TTA). The photoluminescence of 1 is readily quenched by DPA with a rate constant close to the diffusion limit via energy transfer. Selective excitation of 1 leads to the upconverted fluorescence with a near quadratic dependence of the DPA fluorescence intensity on incident light power. This is the first time that the 3MLCT charge transfer excited state of a platinum polypyridine complex has been used to promote photon upconversion.Keywords
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