Enhanced NIR-I emission from water-dispersible NIR-II dye-sensitized core/active shell upconverting nanoparticles

Hazra, Chanchal; Ullah, Sajjad; Correales, York E. Serge; Caetano, Laís G.; Ribeiro, Sidney José Lima

doi:10.1039/c8tc00335a

Cited by 33 publications

(28 citation statements)

References 48 publications

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“…The lanthanides also need to be protected from −CH, −OH, and −NH vibrational overtones, resulting in quenching of the lanthanide luminescence . Some reports reveal that several lanthanide complexes emitting in the NIR‐II can be used in biological imaging . Andraud and co‐workers described the use of two‐photon excitation for imaging in living cells, but required specialized laser equipment (Figure ) .…”

Section: Re Compoundsmentioning

confidence: 96%

“…[106] Some reportsr eveal that several lanthanide complexes emitting in the NIR-II can be used in biological imaging. [107][108][109][110][111] Andrauda nd co-workers described the use of two-photon excitation for imaging in living cells, but required specialized laser equipment( Figure16). [13] Foucault-Collet et al designed new NIR-emitting lanthanide metal-organic frameworks, which overcame the above-mentioned shortcomings by amalgamating massiveN IR-II-emitting Yb 3 + cations.…”

Section: Re Compoundsmentioning

confidence: 99%

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Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Miao

Zhu

et al. 2018

ChemBioChem

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Near‐infrared (NIR) fluorescent materials are considered to be the most promising labeling reagents for sensitive determination and biological imaging due to the advantages of lower background noise, deeper penetrating capacity, and less destructive effects on the biomatrix over those of UV and visible fluorophores. In the past decade, advances in biomedical fluorescence imaging in the NIR region have focused on the traditional NIR window (NIR‐I; λ=700–900 nm), and have recently been extended to the second NIR window (NIR‐II; λ=1000–1700 nm). In vivo NIR‐II fluorescence imaging outperforms imaging in the NIR‐I window as a result of further reduced absorption, tissue autofluorescence, and scattering. In this review, the applications of four types of NIR‐II fluorescent materials, organic fluorophores, quantum dots, rare‐earth compounds, and single‐walled carbon nanotubes, are summarized and future trends are discussed. Some methods to enhance the NIR‐II fluorescence quantum yield are also proposed.

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Section: Re Compoundsmentioning

confidence: 96%

Section: Re Compoundsmentioning

confidence: 99%

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Miao

Zhu

et al. 2018

ChemBioChem

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“…64−66 We highlight only some of the representative examples. In fact, sensitization of the luminescence occurring via upconversion is a challenge because it requires a suitable material which has absorption in the NIR 68 Although NIR dyes are a good choice, their stability is an issue of concern. To overcome this, Vetrone et al have developed an active core/active shell strategy which provides a huge enhancement in upconversion luminescence ( Figure 8).…”

Section: Strategies To Enhance the Luminescence Ofmentioning

confidence: 99%

Design of Lanthanide-Doped Colloidal Nanocrystals: Applications as Phosphors, Sensors, and Photocatalysts

et al. 2018

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The unique optical characteristics of lanthanides (Ln3+) like high colour purity, long excited state lifetimes, less perturbation of excited states by the crystal field environment and ability towards easy spectral conversion of wavelengths through upconversion and downconversion processes have caught the research attention of many scientists in the recent past. To broaden the scope of using these properties, it is important to make suitable Ln3+-doped materials, particularly in colloidal forms. In this feature article, we discuss the different synthetic strategies to make Ln3+-doped nanoparticles in colloidal forms, particularly on ways of functionalizing hydrophobic surfaces to hydrophilic ones for enhancing their dispersibility and luminescence in aqueous medium. We have enumerated the various strategies and sensitizers utilized to increase the luminescence of the nanoparticles. Further, the use of these colloidal nanoparticle systems in sensing application by appropriate selection of capping ligands has been discussed. In addition, we have shown how the energy transfer efficiency from Ce3+ to Ln3+ ions can be utilized for detection of toxic metal ions and small molecules. Finally, we discuss examples where the spectral conversion ability of these materials has been used in photocatalysis and solar cell applications.

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“…Although LDNCs possess such excellent spectroscopic characteristics, the major drawback of LDNCs is their low quantum yield (QY) due to the low extinction coefficient of lanthanide ions in the NIR region and energy lost during multi non-radiative electronic transitions (Wang et al, 2011 ). In recent years, researchers have been devoted to solving this drawback, such as constructing core-shell structures (Chen et al, 2015 ; Zhuo et al, 2017 ) and anchoring NIR dyes on the surface of nanocrystals (Wu X. et al, 2016 ; Hazra et al, 2018 ). Among countless methods for improving the QY (Zhang et al, 2010 ; Yin et al, 2016 ), metal ion doping is the simplest since it is carried out in fewer modulation steps (Niu et al, 2012 ; Ding et al, 2015 ), and it only weakly changes the shape of the LDNCs.…”

Section: Introductionmentioning

confidence: 99%

Metal Ions Doping for Boosting Luminescence of Lanthanide-Doped Nanocrystals

Pei

Sun

2020

Front. Chem.

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With the developing need for luminous materials with better performance, lanthanide-doped nanocrystals have been widely studied for their unique luminescence properties such as their narrow bandwidth emission, excellent chemical stability, and photostability, adjustable emission color, high signal-to-background ratio, deeper tissue penetration with less photo-damage, and low toxicity, etc., which triggered enthusiasm for research on the broad applications of lanthanide-doped nanocrystals in bioimaging, anti-counterfeiting, biosensing, and cancer diagnosis and treatment. Considerable progress has been made in the past few decades, but low upconversion luminescence efficiency has been a hindrance in achieving further progress. It is necessary to summarize the recently relevant literature and find solutions to improve the efficiency. The latest experimental and theoretical studies related to the deliberate design of rare earth luminescent nanocrystals have, however, shown the development of metal ion-doped approaches to enhance the luminescent intensity. Host lattice manipulation can enhance the luminescence through increasing the asymmetry, which improves the probability of electric dipole transition; and the energy transfer modulation offers a reduced cross-relaxation pathway to improve the efficiency of the energy transfer. Based on the mechanisms of host lattice manipulation and energy transfer modulation, a wide range of enhancements at all wavelengths or even within a particular wavelength have been accomplished with an enhancement of up to a hundred times. In this mini review, we present the strategy of metal ion-doped lanthanide nanocrystals to cope with the issue of enhancing luminescence, overview the advantages and tricky challenges in boosting the luminescence, and provide a potential trend of future study in this field.

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Enhanced NIR-I emission from water-dispersible NIR-II dye-sensitized core/active shell upconverting nanoparticles

Abstract: Water-dispersible NIR-II dye (IR-1061) sensitized core/active shell upconversion nanoparticles (800 nm emission of Tm3+ ion).

Cited by 33 publications

References 48 publications

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Recent Progress in Fluorescence Imaging of the Near‐Infrared II Window

Design of Lanthanide-Doped Colloidal Nanocrystals: Applications as Phosphors, Sensors, and Photocatalysts

Metal Ions Doping for Boosting Luminescence of Lanthanide-Doped Nanocrystals

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