Functional Nanohybrids Based on Dyes and Upconversion Nanoparticles
Upconversion nanoparticles (UCNPs) and dyes are combined to make nanohybrid systems, which take advantage of the synergic relationship between lanthanide (Ln)-based UCNPs and dyes. Ln-UCNPs are inorganic nanophosphors which absorb NIR light and emit narro
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Functional Nanohybrids Based on Dyes and Upconversion Nanoparticles Juan Ferrera-González, María González-Béjar, and Julia Pérez-Prieto
Contents 1 Introduction 1.1 UCNP Properties 2 Pre-requirements When Designing Photoactive Nanohybrids by Combining UCNPs and Chromophores 3 Sensing with UCNH 3.1 Inner Filter 3.2 Lanthanide-Based Resonant Energy Transfer 3.3 pH Sensing 3.4 Biomolecules and Ions Sensing 4 Photodynamic Therapy 5 Theragnosis 6 Conclusion Remarks References
Abstract Upconversion nanoparticles (UCNPs) and dyes are combined to make nanohybrid systems, which take advantage of the synergic relationship between lanthanide (Ln)-based UCNPs and dyes. Ln-UCNPs are inorganic nanophosphors which absorb NIR light and emit narrow emission bands in the UV-NIR region with long luminescence lifetimes. These unique properties, when coordinated properly with dyes of the appropriate photophysical features, produce nanosystems with new photophysical properties. In this context, the UCNP-dye nanohybrids are very promising for potential sensing (ions and biomolecules) and theragnosis (imaging and therapy, e.g. photodynamic therapy). Keywords Dyes · Imaging · Photodynamic therapy · Sensors · Upconversion nanoparticles
J. Ferrera-González, M. González-Béjar, and J. Pérez-Prieto (*) Departamento de Química Orgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Valencia, Spain e-mail: [email protected]; [email protected]
J. Ferrera-González et al.
Abbreviation AuNP BCH BODIPY BSA CB Ce6 CT DNA ET FITC GSH IBDP Ln LOD LRET MC540 MRI NI NIR NP PDT PEG PP PPy PS QD ROS TCG UCEr UCHo UCNH UCNP UCTm UCYbErTm UV Vis Zn-PC
Gold nanoparticle A benzopyrylium-coumarin-based hydrogen peroxide-sensitive probe Boron-dipyrromethene Bovine serum albumin Cucurbit[7]uril Chlorin e6 Computed tomography Deoxyribonucleic acid Energy transfer Fluorescein isothiocyanate Glutathione Diiodo-substituted BODIPY Lanthanide Limit of detection Lanthanide-based resonant energy transfer Merocyanine 540 Magnetic resonance imaging 1,8-Naphthalimide Near-infrared Nanoparticle Photodynamic therapy Polyethylene glycol N-aminobacterio-purpurinimide porphyrin Polypyrrole Photosensitizer Quantum dot Reactive oxygen species Thiol-coumarin-based glutathione-sensitive probe β-NaYF4:Yb,Er β-NaYF4:Yb,Ho Upconversion nanohybrid Upconversion nanoparticle β-NaYF4:Yb,Tm β-NaYF4:Yb,Er,Tm. Ultraviolet Visible Zinc phthalocyanine
Functional Nanohybrids Based on Dyes and Upconversion Nanoparticles
1 Introduction UCNPs are being decorated with chromophores with interesting photophysical properties, such as high extinction coefficients, high fluorescence or triplet quantum yields or capability to generate singlet oxygen. According to the chromophore or dye features, the prepared nanohybrids would be applied to different purposes, namely, sensing, imaging, photodynamic therapy (PDT) and so on [1, 2]. This chapter focuses on the requirements needed to succeed when designing a photoactive functional nanohybrid based on the combination of Ln-UCNPs and d
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