Electrochemical detection of heavy metal ions in water

Chemical Communications, Journal Year: 2021, Volume and Issue: 57(59), P. 7215 - 7231

Published: Jan. 1, 2021

Electrochemical sensors demonstrate outstanding performance at detecting heavy metal ions, with a high specific surface area and sensitivity which can excellently complete the on-site detection of trace ions in water.

Language: Английский

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Beyond Platonic: How to Build Metal–Organic Polyhedra Capable of Binding Low-Symmetry, Information-Rich Molecular Cargoes

Chemical Reviews, Journal Year: 2022, Volume and Issue: 122(11), P. 10393 - 10437

Published: April 18, 2022

The field of metallosupramolecular chemistry has advanced rapidly in recent years. Much work this area focused on the formation hollow self-assembled metal-organic architectures and exploration applications their confined nanospaces. These discrete, soluble structures incorporate metal ions as 'glue' to link organic ligands together into polyhedra.Most employed thus far have been highly symmetrical, these easiest prepare. Such high-symmetry contain pseudospherical cavities, so typically bind roughly spherical guests. Biomolecules high-value synthetic compounds are rarely isotropic, highly-symmetrical species. To bind, sense, separate, transform such substrates, new, lower-symmetry, cages needed. Herein we summarize approaches, which taken form first draft a handbook for design higher-complexity, architectures.

Language: Английский

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Facile Fabrication of Luminescent Eu(III) Functionalized HOF Hydrogel Film with Multifunctionailities: Quinolones Fluorescent Sensor and Anticounterfeiting Platform

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(37)

Published: June 25, 2021

Abstract The luminescent hydrogen‐bonded organic framework (HOF) based films have become one of the most remarkable materials for optical application, thus, developing facile synthesis methods and establishing multifunctional applications HOF‐based are essential. Herein, a dual‐emitting Eu 3+ ‐functionalized HOF hydrogel film ( 1 ) is fabricated successfully. emits blue‐green long afterglow when turning off UV lamp, lifetime gets to 1.99 s. performs great selectivity, high sensitivity, low detection limit toward ofloxacin flumequine, sensing flumequine in accord with chroma ratio modes. fluorescent response mechanisms investigated depth, which further utilized build an anticounterfeiting platform high‐level security. film‐based can conduct information encryption on demand inline different responses also fetch specific by controlling intensity excited light. This study not only provides representative case fabrication but opens possibility as intelligent multifunctionalities.

Language: Английский

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Self-Assembled Metallacage with Second Near-Infrared Aggregation-Induced Emission for Enhanced Multimodal Theranostics

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(28), P. 12825 - 12833

Published: July 5, 2022

The construction of supramolecular coordination complexes (SCCs) featuring prominent cancer theranostic functions is an appealing yet significantly challenging task. In this study, we rationally designed and facilely constructed a prism-like metallacage C-DTTP with efficient fluorescence emission in the second near-infrared (NIR-II) region through assembly aggregation-induced emission-active four-arm ligand 90° Pt acceptors Pt(PEt3)2(OTf)2. held longest maximum wavelength (1005 nm) compared those previously reported SCCs up to now exhibited both high photothermal conversion efficiency (39.3%) superior reactive oxygen species generation behavior precursor ligand. vitro vivo assessments demonstrated that metallacage-loaded nanoparticles excellent biocompatibility stability were capable simultaneously affording precise tumor diagnosis complete elimination by means NIR-II fluorescence/photothermal dual imaging-guided photodynamic/photothermal synergistic therapy.

Language: Английский

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Endohedral functionalization of chiral metal-organic cages for encapsulating achiral dyes to induce circularly polarized luminescence

Chem, Journal Year: 2021, Volume and Issue: 7(10), P. 2771 - 2786

Published: Aug. 24, 2021

Language: Английский

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Tetraphenylethylene‐Based Multicomponent Emissive Metallacages as Solid‐State Fluorescent Materials

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(22), P. 12293 - 12297

Published: March 16, 2021

Abstract The construction of solid‐state fluorescent materials with high quantum yield and good processability is vital importance in the preparation organic light‐emitting devices. Herein, a series tetraphenylethylene (TPE)‐based multicomponent emissive metallacages are prepared by coordination‐driven self‐assembly tetra‐(4‐pyridylphenyl)ethylene, cis‐Pt(PEt 3 ) 2 (OTf) tetracarboxylic ligands. These exhibit emission both solution solid state because coordination bonds aggregation restrict molecular motions TPE synergistically, which suppresses non‐radiative decay these metallacages. Impressively, one achieves very fluorescence ( Φ F =88.46 %) state, further used as coatings blue LED bulb to achieve white‐light emission. study not only provides general method TPE‐based but also explores their applications materials, will promote future design useful

Language: Английский

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Double Lock Label Based on Thermosensitive Polymer Hydrogels for Information Camouflage and Multilevel Encryption

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(16)

Published: Feb. 1, 2022

Developing extra safety encryption technologies to prevent information leakage and combat fakes is in high demand but challenging. Herein, we propose a "double lock" strategy based on both lower critical solution temperature (LCST) upper (UCST) polymer hydrogels for camouflage multilevel encryption. Two types of were synthesized by the method random copolymerization. The number -CO-NH2 groups network structure changed enthalpic or entropic thermo-responsive hydrogels, ultimately precisely controlled their phase transition temperature. crosslink density governs diffusion kinetics, resulting difference time color change. combination multiple LCST UCST one label realized dynamic identification dimensions This work highly interesting fields encryption, anti-counterfeiting, smart responsive materials.

Language: Английский

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Highly Emissive Multipurpose Organoplatinum(II) Metallacycles with Contrasting Mechanoresponsive Features

Inorganic Chemistry, Journal Year: 2022, Volume and Issue: 61(6), P. 2883 - 2891

Published: Feb. 2, 2022

The development of supramolecular coordination complexes (SCCs) with a bright aggregate state or mechanical-stimuli-responsive luminescence is very significant and challenging. Herein, we report the synthesis three different platinum(II) metallacycles via coordination-driven self-assembly diplatinum(II) acceptor organic donors triphenylamine, carbazole, tetraphenylethylene moiety. triphenylamine-modified SCC exhibits aggregation-induced emission enhancement (AIEE) but no mechanofluorochromism. carbazole tetraphenylethylene-based SCCs exhibit changes in fluorescence also reversible This work not only reports rare AIEE, change, mechanofluorochromic nature explores their potential applications cell imaging solid-state lighting.

Language: Английский

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Guest‐Regulated Generation of Reactive Oxygen Species from Porphyrin‐Based Multicomponent Metallacages for Selective Photocatalysis

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(14)

Published: Feb. 2, 2024

Abstract The development of novel materials for highly efficient and selective photocatalysis is crucial their practical applications. Herein, we employ the host‐guest chemistry porphyrin‐based metallacages to regulate generation reactive oxygen species further use them photocatalytic oxidation benzyl alcohols. Upon irradiation, sole metallacage ( 6 ) can generate singlet 1 O 2 effectively via excited energy transfer, while its complex with C 70 ⊃C opens a pathway electron transfer promote formation superoxide anion (O ⋅ − ), producing both . addition 4,4′‐bipyridine (BPY) forms more stable ⊃BPY) coordination Zn‐porphyrin faces BPY, which drives fullerenes out cavities restores ability generation. Therefore, alcohols are oxidized into aldehydes upon irradiation in presence or ⊃BPY, they benzoic acids when employed as photosensitizing agent. This study demonstrates strategy that utilizes photooxidation reactions, could utilization related complexes

Language: Английский

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Drum-like Metallacages with Size-Dependent Fluorescence: Exploring the Photophysics of Tetraphenylethylene under Locked Conformations

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(24), P. 9215 - 9221

Published: June 9, 2021

Materials with aggregation-induced emission (AIE) properties are of growing interest due to their widespread applications. AIEgens, such as tetraphenylethylene units, display varying behaviors during conformational changes. However, the structure–property relationships intermediate conformations have rarely been explored. Herein, we show that restriction on TPE units can affect structural relaxation in excited state and resulting photophysical behaviors. Specifically, three metallacages different sizes were prepared via coordination-driven self-assembly a TPE-based tetrapyridyl donor length-increasing Pt(II) acceptors. While share similar scaffolds, they exhibit trend red-shifted fluorescence attenuated quantum yield increase sizes. Furthermore, spectroscopic computational studies together control experiment conducted, revealing degree cage tension imposed excited-state moieties resulted distinct properties. The precise conformation holds promise strategy for understanding AIE mechanism well optimizing materials platform supramolecular coordination complexes.

Language: Английский

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