Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas

Ogawa, Shigesaburo; Wakayama, Takuya; Watanabe, Hiroto; Hayashi, Kosei; Ogata, Shuhei; Oaki, Yuya; Hasegawa, Miki; Imai, Hiroaki

doi:10.1246/bcsj.20170291

Cited by 15 publications

(4 citation statements)

References 25 publications

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“…Luminescent sensors for PAH analytes can detect the PAHs directly through monitoring their absorption and/or fluorescence emission signals, as many of these compounds have high extinction coefficients and quantum yields . Indirect detection methods can provide additional advantages, including the ability to tune the fluorescence read-out signal to generate well-separated signals for PAH analytes with overlapping spectra .…”

Section: Common Analytesmentioning

confidence: 99%

“…Luminescent sensors for PAH analytes can detect the PAHs directly through monitoring their absorption 791 and/or fluorescence emission signals, 792 as many of these compounds have high extinction coefficients and quantum yields. 793 Indirect detection methods can provide additional advantages, including the ability to tune the fluorescence read-out signal to 794 Indirect detection methods include the use of PAHs as energy donors in combination with high quantum yield energy acceptors, where the fluorescence read-out of the energy acceptor from excitation of the energy donor occurs only in the presence of the PAH analyte. 465,795,122 Other detection methods, including those that rely on π−π interactions between the PAH analytes and conjugated polymers, 796 those that require adsorption of the PAHs to carbon nanotube surfaces, 797 and those that bind PAHs in luminescent macrocycles, 297 have also been reported.…”

Section: Anionsmentioning

confidence: 99%

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Supramolecular Luminescent Sensors

2018

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There is great need for stand-alone luminescence-based chemosensors that exemplify selectivity, sensitivity, and applicability and that overcome the challenges that arise from complex, real-world media. Discussed herein are recent developments toward these goals in the field of supramolecular luminescent chemosensors, including macrocycles, polymers, and nanomaterials. Specific focus is placed on the development of new macrocycle hosts since 2010, coupled with considerations of the underlying principles of supramolecular chemistry as well as analytes of interest and common luminophores. State-of-the-art developments in the fields of polymer and nanomaterial sensors are also examined, and some remaining unsolved challenges in the area of chemosensors are discussed. CONTENTS 4.4. Explosives 4.5. Pharmaceutical Agents 4.6. Biologically Relevant 4.6.1. Adenosine Triphosphate (ATP)

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Section: Common Analytesmentioning

confidence: 99%

Section: Anionsmentioning

confidence: 99%

Supramolecular Luminescent Sensors

2018

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“…Moreover, the B ions of Y, Gd, and La also would greatly affect the QY values in these frameworks. As we know, the QY of the fluorescent molecules is usually affected by the host material, concentration quenching, dopant ions, aggregation, excimer formation, morphology, particle size, temperature, and so on. − Here, the resultant samples have a similar doping concentration of Eu 3+ ions, morphology, particle size, and synthesis method, but the QY value of CYN:0.1Eu 3+ would be higher than those of CBB′:0.1Eu 3+ (B = Gd and La; B′ = Nb and Sb) phosphors, implying that more photons would be excited in CYN:0.1Eu 3+ phosphor briefly . To better investigate the PL performances of the obtained samples, some relative results are summarized in Table S1 (SI).…”

Section: Resultsmentioning

confidence: 98%

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Hua

2021

ACS Sustainable Chem. Eng.

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At present, rare-earth-activated perovskite-type materials have attracted lots of interest from researchers owing to their excellent advantages of unique electron properties and stable structure. This present work was designed to synthesize, investigate, and compare the photoluminescence properties in europium(III) (Eu 3+ )-activated Ca 2 BB′O 6 (B = Y, Gd, and La; B′ = Sb and Nb) double-perovskite (A 2 BB′O 6 ) luminescent materials. The doped Eu 3+ ions substitute the B sites of Y 3+ , Gd 3+ , and La 3+ ions, which are distributed to the equilibrium valence state and exhibit little difference in ion radius among them. All the resultant samples have a monoclinic structure, and the B sites strongly affect the space group in double-perovskite Ca 2 BB′O 6 frameworks. Additionally, the emission intensity, thermal stability, decay curve, color purity, quantum yield (QY), etc. were determined. The Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) frameworks have good QYs (>42%), which are promising for white-light-emitting diodes (WLEDs). Besides, the red-emitting Ca 2 BB′O 6 :Eu 3+ − polydimethylsiloxane (PDMS) and white-emitting CYN0.1Eu 3+ −commercial phosphors (CP)−PDMS films were fabricated. Eventually, the packaged WLEDs based on the Ca 2 BNbO 6 :Eu 3+ (B = Y, Gd, and La) powders and a novel white-emitting structure based on the CYN:0.1Eu 3+ −CP−PDMS film were confirmed to have suitable color rendering index and correlated color temperature values for indoor illumination.

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“…Inorganic low-dimensional nanomaterials often exhibit interesting properties [209–215]. Such materials can be also nano-engineered at liquid interfaces.…”

Section: Reviewmentioning

confidence: 99%

Materials nanoarchitectonics at two-dimensional liquid interfaces

Ariga

Matsumoto

Mori

2019

Beilstein J. Nanotechnol.

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Much attention has been paid to the synthesis of low-dimensional materials from small units such as functional molecules. Bottom-up approaches to create new low-dimensional materials with various functional units can be realized with the emerging concept of nanoarchitectonics. In this review article, we overview recent research progresses on materials nanoarchitectonics at two-dimensional liquid interfaces, which are dimensionally restricted media with some freedoms of molecular motion. Specific characteristics of molecular interactions and functions at liquid interfaces are briefly explained in the first parts. The following sections overview several topics on materials nanoarchitectonics at liquid interfaces, such as the preparation of two-dimensional metal-organic frameworks and covalent organic frameworks, and the fabrication of low-dimensional and specifically structured nanocarbons and their assemblies at liquid–liquid interfaces. Finally, interfacial nanoarchitectonics of biomaterials including the regulation of orientation and differentiation of living cells are explained. In the recent examples described in this review, various materials such as molecular machines, molecular receptors, block-copolymer, DNA origami, nanocarbon, phages, and stem cells were assembled at liquid interfaces by using various useful techniques. This review overviews techniques such as conventional Langmuir–Blodgett method, vortex Langmuir–Blodgett method, liquid–liquid interfacial precipitation, instructed assembly, and layer-by-layer assembly to give low-dimensional materials including nanowires, nanowhiskers, nanosheets, cubic objects, molecular patterns, supramolecular polymers, metal-organic frameworks and covalent organic frameworks. The nanoarchitecture materials can be used for various applications such as molecular recognition, sensors, photodetectors, supercapacitors, supramolecular differentiation, enzyme reactors, cell differentiation control, and hemodialysis.

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Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas

Cited by 15 publications

References 25 publications

Supramolecular Luminescent Sensors

Supramolecular Luminescent Sensors

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Materials nanoarchitectonics at two-dimensional liquid interfaces

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Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas

Cited by 15 publications

References 25 publications

Supramolecular Luminescent Sensors

Supramolecular Luminescent Sensors

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca2BB′O6 (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

Materials nanoarchitectonics at two-dimensional liquid interfaces

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Product

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About

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca₂BB′O₆ (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes