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- W2950993835 abstract "Abstract Bright lanthanide based probes for optical bioimaging must rely on the antenna principle, where the lanthanide‐centred excited state is formed by a complex sensitization process. Efficient sensitization of lanthanide‐centred emission occurs via triplet states centred on the sensitizing chromophore. Here, the triplet state of thioxanthone chromophores is modulated by extending the π‐system. Three thioxanthone chromophores‐thioxanthone, benzo[c]thioxanthone, and naphtho[2,3‐c]thioxanthone were synthesised and characterised. The triplet state energies and lifetimes is found to change as expected, and two dyes are found to be suitable sensitizers for europium( iii ) luminescence. Reactive derivatives of thioxanthone and benzo[c]thioxanthone were prepared and coupled to a 1,4,7,10‐tetraazacyclododecane‐1,4,7‐triacetic acid (DO3A) lanthanide binding pocket. The photophysics and the performance in optical bioimaging of the resulting europium( iii ) complexes were investigated. It is concluded that while the energetics favour efficient sensitization, the solution structure does not. While it was found that the complexes are too lipophilic to be efficient luminescent probes for optical bioimaging, we successfully demonstrated bioimaging using europium( iii ) luminescence following 405 nm excitation." @default.
- W2950993835 created "2019-06-27" @default.
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- W2950993835 date "2019-07-08" @default.
- W2950993835 modified "2023-09-30" @default.
- W2950993835 title "π‐Expanded Thioxanthones – Engineering the Triplet Level of Thioxanthone Sensitizers for Lanthanide‐Based Luminescent Probes with Visible Excitation" @default.
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- W2950993835 doi "https://doi.org/10.1002/cplu.201900309" @default.
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- W2950993835 hasPublicationYear "2019" @default.
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