Enhanced Fluorescence Detection of Metal Ions Using Light‐Harvesting Mesoporous Organosilica

Waki, Minoru; Mizoshita, Norihiro; Maegawa, Yoshifumi; Hasegawa, Takeru; Tani, Takao; Shimada, Toyoshi; Inagaki, Shinji

doi:10.1002/chem.201102492

Cited by 52 publications

(28 citation statements)

References 43 publications

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“…Mesostructured and mesoporous organosilica materials have attracted much attention because of their high applicability to optical materials, electronic devices, adsorbents, solid catalysts, and biomedical uses . The covalent inorganic–organic hybrid framework with mesostructures is constructed by surfactant‐directed polycondensation of bridged organosilane precursors (R[Si(OR′) 3 ] n ; n ≥ 2).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photoluminescence of Mesostructured Organosilica Films with a High Density of Fluorescent Chromophores

Mizoshita

Inagaki

2018

Macro Chemistry & Physics

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Synthesis of mesostructured materials containing a high density of organic chromophores in the frameworks is highly desired for applications in unique optical devices using energy transfer. However, a dense accumulation of fluorescent chromophores in solid form generally causes concentration quenching. In this study, dense embedding of the chromophore 1,6‐diphenylpyrene within the framework of mesostructured organosilica films results in efficient blue fluorescence emission with high quantum yields of over 0.75. In contrast to conventional fluorescent films where chromophores are diluted and isolated to suppress concentration quenching, increasing the density of 1,6‐diphenylpyrene moieties within the mesostructured framework leads to the efficient formation of highly emissive excimers. Mesostructured frameworks achieving both high light‐absorptivity and efficient fluorescence emission have great potential in light‐emitting materials, fluorescence sensors, and light‐harvesting components for photoluminescent and photocatalytic systems.

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Section: Introductionmentioning

confidence: 99%

Enhanced Photoluminescence of Mesostructured Organosilica Films with a High Density of Fluorescent Chromophores

Mizoshita

Inagaki

2018

Macro Chemistry & Physics

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“…Even the emission properties of fluorescent MSMs are conferred by the doping species. However, their optical properties are not only depend on their own characteristics, but also on their possible cross‐interactions with the silica frameworks . In general, the detection signal could be divide into turn‐on, turn‐off, and ratiometric methods ( Figure ) …”

Section: Optical Sensing Mechanismmentioning

confidence: 99%

“…Inagaki and co‐workers reported a light‐harvesting PMO which was prepared by immobilization of a fluorescent receptor containing BPy ligand onto pore walls ( Figure a) . Sensitive detection of Cu 2+ was achieved by selective fluorescence quenching upon the addition of low concentrations of Cu 2+ (0.15–1.2 × 10 −6 m ).…”

Section: Applicationsmentioning

confidence: 99%

Interfacial Assembly of Mesoporous Silica‐Based Optical Heterostructures for Sensing Applications

Gao

Zeng

Liang

et al. 2020

Adv Funct Materials

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Functionalized mesoporous silica materials (MSMs) are extensively investigated in sensing science due to their diverse structural and optical properties including tunable pore size, modifiable surface properties, and excellent accessibility to active sites. In the last few years, great efforts have been devoted to developing modification methods for MSMs for sensing applications with augmented sensitivity, super selectivity, as well as targeting capability, and multimodal capabilities. The functional group, structure, morphology, and component levels in the assembly of heterostructures of MSMs are a key for high sensing performance. As the development of mesoporous silica‐based sensing materials progresses, diverse functional units and materials are rationally implemented into the mesoporous structures. These heterostructures can maintain the excellent structural features of mesoporous silica and the optical properties of the functional units simultaneously, which shows the advantages of photostability, design flexibility, and multifunctionality. Here, an up‐to‐date overview of the fabrication strategies, the properties, and the sensing mechanisms of optical heterostructures based on MSMs is provided. A number of crucial sensing domains, including ionic, molecules, temperature, and biological species are highlighted. Finally, the prospects and potential sensing applications of mesoporous silica‐based optical heterostructures are discussed.

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“…Owing to the enhanced surface properties and structural diversity, the porous organic-inorganic hybrid materials have found huge potential applications in catalysis, [1] nanotechnology, [2] light harvesting, [3] chemical sensing, [4] gas storage, [5] separation, [6] and biomedical research. [7] Their design and synthesis have become an art to develop the next-generation functionalized solid-state materials.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembled Hybrid Molybdenum Phosphonate Porous Nanomaterials and Their Catalytic Activity for the Synthesis of Benzimidazoles

Pramanik

Bhaumik

2014

ChemCatChem

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A new porous organic–inorganic hybrid molybdenum phosphonate nanomaterial (HMoP‐1) was synthesized through the reaction of benzene‐1,3,5‐triphosphonic acid and molybdenum(V) chloride under hydrothermal conditions in the absence of any structure‐directing agent. The morphology of the hybrid material was found to be different at different synthesis temperatures. The material synthesized at 423 K (HMoP‐1‐LT) has spherical particle morphology, and the material synthesized at 453 K (HMoP‐1‐HT) has self‐assembled flakelike morphology. Powder XRD, field‐emission SEM, high‐resolution TEM, N2 sorption, solid‐state 13C cross‐polarization magic‐angle spinning NMR and 31P magic‐angle spinning NMR analyses, X‐ray photoelectron spectroscopy, thermogravimetric differential thermal analysis, NH3 temperature‐programmed adsorption, and FTIR spectroscopic techniques were employed to characterize the samples and understand the morphological diversity. The orthorhombic crystal phase of the material was established through REFLEX and CELSIZ unit cell refinement programs. The calculated unit cell parameters of HMoP‐1‐HT are a=8.001(0.046) Å b=7.029 (0.039) Å, c=6.010 (0.036) Å; whereas HMoP‐1‐LT is amorphous in nature. HMoP‐1‐HT shows outstanding catalytic activity and high recycling efficiency for the green and efficient one‐pot condensation reaction for the synthesis of bioactive 2‐aryl benzimidazoles in excellent yields at room temperature.

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Enhanced Fluorescence Detection of Metal Ions Using Light‐Harvesting Mesoporous Organosilica

Cited by 52 publications

References 43 publications

Enhanced Photoluminescence of Mesostructured Organosilica Films with a High Density of Fluorescent Chromophores

Enhanced Photoluminescence of Mesostructured Organosilica Films with a High Density of Fluorescent Chromophores

Interfacial Assembly of Mesoporous Silica‐Based Optical Heterostructures for Sensing Applications

Self‐Assembled Hybrid Molybdenum Phosphonate Porous Nanomaterials and Their Catalytic Activity for the Synthesis of Benzimidazoles

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