Spotlight on Luminescence Thermometry: Basics, Challenges, and Cutting‐Edge Applications

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Июль 21, 2023

Abstract Luminescence (nano)thermometry is a remote sensing technique that relies on the temperature dependency of luminescence features (e.g., bandshape, peak energy or intensity, and excited state lifetimes risetimes) phosphor to measure temperature. This provides precise thermal readouts with superior spatial resolution in short acquisition times. Although thermometry just starting become more mature subject, it exhibits enormous potential several areas, e.g., optoelectronics, photonics, micro‐ nanofluidics, nanomedicine. work reviews latest trends field, including establishment comprehensive theoretical background standardized practices. The reliability, repeatability, reproducibility are also discussed, along use multiparametric analysis artificial‐intelligence algorithms enhance readouts. In addition, examples provided underscore challenges faces, alongside need for continuous search design new materials, experimental techniques, procedures improve competitiveness, accessibility, popularity technology

Язык: Английский

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Construction of Covalent Organic Frameworks via Multicomponent Reactions

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(3), С. 1475 - 1496

Опубликована: Янв. 16, 2023

Multicomponent reactions (MCRs) combine at least three reactants to afford the desired product in a highly atom-economic way and are therefore viewed as efficient one-pot combinatorial synthesis tools allowing one significantly boost molecular complexity diversity. Nowadays, MCRs no longer confined organic have found applications materials chemistry. In particular, can be used prepare covalent frameworks (COFs), which crystalline porous assembled from monomers exhibit broad range of properties applications. This synthetic approach retains advantages small-molecule MCRs, not only strengthening skeletal robustness COFs, but also providing additional driving forces for their crystallization, has been series robust COFs with diverse The present perspective article provides general background discusses types employed COF date, addresses related critical challenges future perspectives inspire MCR-based design new promote further progress this emerging field.

Язык: Английский

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One‐Dimensional Covalent Organic Frameworks for the 2e⁻ Oxygen Reduction Reaction

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(14)

Опубликована: Янв. 19, 2023

Two-dimensional covalent organic frameworks (2D COFs) are often employed for electrocatalytic systems because of their structural diversity. However, the efficiency atom utilization is still in need improvement, catalytic centers located basal layers and it difficult electrolytes to access them. Herein, we demonstrate use 1D COFs 2e- oxygen reduction reaction (ORR). The different four-connectivity blocks resulted prepared displaying good crystallinity, high surface areas, excellent chemical stability. more exposed sites showing large electrochemically active 4.8-fold that a control 2D COF, thus enabled catalysis ORR with higher H2 O2 selectivity 85.8 % activity, TOF value 0.051 s-1 at 0.2 V, than COF (72.9 0.032 ). This work paves way development low dimensions electrocatalysis.

Язык: Английский

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Boosting CO₂ Photoreduction via Regulating Charge Transfer Ability in a One‐Dimensional Covalent Organic Framework

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(46)

Опубликована: Сен. 28, 2023

Two-dimensional (2D) imine-based covalent organic frameworks (COFs) hold potential for photocatalytic CO2 reduction. However, high energy barrier of imine linkage impede the in-plane photoelectron transfer process, resulting in inadequate efficiency photoreduction. Herein, we present a dimensionality induced local electronic modulation strategy through construction one-dimensional (1D) pyrene-based (PyTTA-COF). The dual-chain-like edge architectures 1D PyTTA-COF enable stabilization aromatic backbones, thus reducing loss during exciton dissociation and thermal relaxation, which provides energetic to traverse linkages. As result, exhibits significantly enhanced photoreduction activity under visible-light irradiation when coordinated with metal cobalt ion, yielding remarkable CO evolution 1003 μmol g-1 over an 8-hour period, surpasses that corresponding 2D counterpart by factor 59. These findings valuable approach address charge limitations COFs.

Язык: Английский

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One‐Dimensional Covalent Organic Framework as High‐Performance Cathode Materials for Lithium‐Ion Batteries

Small, Год журнала: 2023, Номер 19(24)

Опубликована: Март 14, 2023

Covalent organic frameworks (COFs) have emerged as a new class of cathode materials for energy storage in recent years. However, they are limited to two-dimensional (2D) or three-dimensional (3D) framework structures. Herein, this work reports designed synthesis redox-active one-dimensional (1D) COF and its composites with 1D carbon nanotubes (CNTs) via situ growth. Used Li-ion batteries, the COF@CNT unique dendritic core-shell structure can provide abundant easily accessible sites, which contribute improve diffusion rate lithium ions corresponding specific capacity. This synergistic structural design enables excellent electrochemical performance cathodes, giving rise 95% utilization high capability (81% capacity retention at 10 C), long cycling stability (86% after 600 cycles 5 C). As first example explore application COFs field storage, study demonstrates great potential novel type linear crystalline porous polymers battery technologies.

Язык: Английский

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One‐Dimensional Covalent Organic Framework‐Based Multilevel Memristors for Neuromorphic Computing

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(20)

Опубликована: Март 21, 2024

Abstract Memristors are essential components of neuromorphic systems that mimic the synaptic plasticity observed in biological neurons. In this study, a novel approach employing one‐dimensional covalent organic framework (1D COF) films was explored to enhance performance memristors. The unique structural and electronic properties two 1D COF (COF‐4,4′‐methylenedianiline (MDA) COF‐4,4′‐oxydianiline (ODA)) offer advantages for multilevel resistive switching, which is key feature computing applications. By further introducing TiO 2 layer on COF‐ODA film, built‐in electric field between COF‐TiO interfaces could be generated, demonstrating feasibility utilizing COFs as platform constructing memristors with tunable states. nanochannels these structures contributed efficient modulation electrical conductance, enabling precise control over weights circuits. This study also investigated potential COF‐based achieve energy‐efficient high‐density memory devices.

Язык: Английский

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1D Covalent Organic Frameworks Triggering Highly Efficient Photosynthesis of H₂O₂ via Controllable Modular Design

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(12)

Опубликована: Фев. 1, 2024

The topological diversity of covalent organic frameworks (COFs) enables considerable space for exploring their structure-performance relationships. In this study, we report a sequence novel 1D COFs (EO, ES, and ESe-COF) with typical 4-c sql topology that can be interconnected VIA group elements (O, S, Se) via modular design strategy. It is found the electronic structures, charge delivery property, light harvesting ability, hydrophilicity these profoundly influenced by bridge-linked atom ordinal. Finally, EO-COF, possessing highest quantity active sites, longest lifetime electron, strongest interaction O

Язык: Английский

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Porous covalent organic framework liquid for boosting CO2 adsorption and catalysis via dynamically expanding effect

National Science Review, Год журнала: 2025, Номер 12(3)

Опубликована: Янв. 24, 2025

ABSTRACT The features of intrinsic porosity and fluidity endow porous liquids (PLs) with unique properties performance but the preparation PLs remains challenging due to difficulty in liquefying keeping at same time. Herein, we develop a stepwise surface functionalization ion exchange strategy achieve rare example flexible covalent organic framework (COF)-based PL (COF-PLs). By coating outer judiciously selected three-dimensional COF-301 an imidazolium salt corona, followed by liquefaction using anion canopy potassium poly(ethylene glycol) sulfonate (PEGS) via electrostatic interactions, PL, COF-301-PL, can be obtained. Theoretical calculations CO2 adsorption experiments reveal that cavities COF-301-PL undergo dynamic adjustments response changes pressure. expansion effect not only provide additional gas capacity (7.04 mmol/g 40 bar) also facilitate mass transfer molecules during catalytic process. Consequently, exhibits superior efficiency for conversion into cyclic carbonate factor 24 17 compared those PEGS solid counterpart, respectively. optimization substrate conditions consequently improves overall reactions. This work offers new perspective on their great potential application catalysis.

Язык: Английский

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A Spirobifluorene-Based Covalent Organic Framework for Dual Photoredox and Nickel Catalysis

Journal of the American Chemical Society, Год журнала: 2023, Номер 145(46), С. 25074 - 25079

Опубликована: Ноя. 7, 2023

Covalent organic frameworks (COFs) have emerged as tunable, crystalline, and porous functional materials, but their application in photocatalysis has been limited by rapid excited-state quenching. Herein, we report the first example of dual photoredox/nickel catalysis an sp2 carbon-conjugated spirobifluorene-based COF. Constructed from spirobifluorene nickel-bipyridine linkers, NiSCN COF adopted a two-dimensional structure with staggered stacking. Under light irradiation, catalyzed amination etherification/esterification reactions aryl halides through photoredox mechanism, catalytic efficiency more than 23-fold higher that its homogeneous control. was used five consecutive without significant loss activity.

Язык: Английский

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Europium(III) Functionalized Covalent Organic Framework as Sensitive and Selective Fluorescent Switch for Detection of Uranium

Analytical Chemistry, Год журнала: 2024, Номер 96(12), С. 5037 - 5045

Опубликована: Март 13, 2024

Uranium poses severe health risks due to its radioactivity and chemical toxicity if released into the environment. Therefore, there is an urgent demand develop sensing materials in situ monitoring of uranium with high sensitivity stability. In this work, a fluorescent Eu3+-TFPB-Bpy synthesized by grafting Eu3+ cation onto TFPB-Bpy covalent organic framework (COF) through Schiff base condensation monomers 1,3,5-tris(4-formylphenyl)benzene (TFPB) 5,5′-diamino-2,2′-bipyridine (Bpy). The fluorescence enhanced compared that TFPB-Bpy, which originated from intramolecular rotations building blocks limited bipyridine units coordinated Eu3+. More significantly, highly efficient probe for UO22+ aqueous solution luminescence intensity efficiently amplified complexation turn-on capability was derived resonance energy transfer occurring Eu3+-TFPB-Bpy. developed displayed desirable linear range 5 nM μM good selectivity rapid response time (2 s) mining wastewater. This strategy provides vivid illustration designing lanthanide COF hybrid applications environmental monitoring.

Язык: Английский

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