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- W2904251015 abstract "Luminescent lanthanides emitting in the near-infrared (NIR) region of the electromagnetic spectrum have interesting properties, which continue to attract an escalating attention for their use in bioanalytical and optical imaging applications. For lanthanide sensitization, it is favorable to have a molecular entity with a high density of lanthanide ions in proximity to an antenna (chromophore). The latter can efficiently absorb a sufficient number of photons and transfer the corresponding energy to lanthanides, which will then emit its specific NIR luminescence. To achieve this goal elegantly, a great solution is offered by using metal organic frameworks (MOFs). Although, the lanthanide-based luminescence has been intensively exploited over decades, lanthanide-containing MOFs are still at the early stage of development. In this work, we report on a novel nano-system for bioimaging: lanthanide-containing MOFs Yb(BTC) with NIR chromophore (sensitizer) incorporated in the MOFs pores. We have successfully incorporated two organic antraquinone chromophores inside the Yb(BTC) MOF pores. The photophysical properties of this system were investigated and show an efficient sensitization of the Yb3+ emission at 980 nm. The obtained results are very important for the field since this kind of experiments has been performed for the first time in this work. Since the system has very limited emission intensity in water, we have undertaken different coatings of the chromophore@MOF system in order to avoid the luminescence quenching and to make this system suitable for use as bioimaging agents for in cellulo applications. Finally, the silica-coated chromophore@MOF nanoparticles were tested for imaging of living cells. Indeed, the NIR Yb3+ emission signal from the chromophore@MOF system was detected with the excitation close to NIR, which represents a major achievement accomplished in this work and a major breakthrough in the world of bioimaging." @default.
- W2904251015 created "2018-12-22" @default.
- W2904251015 creator A5030056398 @default.
- W2904251015 date "2014-07-04" @default.
- W2904251015 modified "2023-09-26" @default.
- W2904251015 title "Novel NanoMOF-Based Systems for Near Infrared Bioimaging" @default.
- W2904251015 hasPublicationYear "2014" @default.
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