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The Photophysical Properties of Multi-Functional Quantum Dots-Magnetic Nanoparticles—Indium Octacarboxyphthalocyanine Nanocomposite

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Abstract

This work presents the development of a multifunctional hybrid nanoparticle made of L-glutathione capped quantum dots (GSH-CdSe@ZnS), amino functionalized Fe3O4 magnetic nanoparticles and indium octacarboxy phthalocyanine (ClInPc(COOH)8). In this work we investigate the photophysical properties of the individual components and the hybrid nanoparticle, in addition we study the energy transfer (Förster Resonance Energy Transfer (FRET)) in the complex. FRET efficiencies of ~48 % were obtained for energy transfer between the QDs (when alone or linked to MNPs). Both triplet yields and lifetimes of ClInPc(COOH)8 increase in the nanocomposite, with a decrease in fluorescence lifetime. The hybrid nanoparticle showed improved photophysical properties and as a result can be used in photodynamic therapy.

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Acknowledgments

This work was supported by the Department of Science and Technology (DST) Innovation and National Research Foundation (NRF), South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology (UID = 62620) as well as Rhodes University (South Africa).

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  1. Department of Chemistry, Rhodes University, Grahamstown, 6140, South Africa

    Charmaine Tshangana & Tebello Nyokong

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  1. Charmaine Tshangana
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  2. Tebello Nyokong
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Correspondence to Tebello Nyokong.

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Tshangana, C., Nyokong, T. The Photophysical Properties of Multi-Functional Quantum Dots-Magnetic Nanoparticles—Indium Octacarboxyphthalocyanine Nanocomposite. J Fluoresc 25, 199–210 (2015). https://doi.org/10.1007/s10895-014-1497-6

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  • DOI: https://doi.org/10.1007/s10895-014-1497-6

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