Integration of lanthanide MOFs/methylcellulose-based fluorescent sensor arrays and deep learning for fish freshness monitoring

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 265, P. 131011 - 131011

Published: March 20, 2024

Language: Английский

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Viologen Guest-Mediated Luminescence Emission Tuning and Photochromic Behavior by a Series of Viologen@Zn-MOF Materials

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(44), P. 51411 - 51420

Published: Oct. 26, 2023

The encapsulation of various guest molecules into the pores metal-organic frameworks (MOFs) to form hybrid materials has attracted significant attention due their unique spatial distribution and certain preferential geometry guests inside MOFs. This arrangement often results in exhibiting physical chemical properties intramolecular interactions with host. In this article, five viologen derivatives were introduced as a Zn-MOF different benzene ring lengths, resulting formation host-guest three-dimensional (3D) compounds exhibited guest-dependent emission wavelength, color, excellent photochromic behavior upon ultraviolet (UV) light radiation distinct electronic transfer π···π stacking between host framework. study provides strategy for designing color-tunable luminescent highly sensitive materials.

Language: Английский

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A Multifunctional Ca^II–Eu^III Heterometallic Organic Framework with Sensing and Selective Adsorption in Water

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(15), P. 6871 - 6882

Published: April 1, 2024

With increasing global industrialization, it is urgent and challenging to develop multifunctional species for detection adsorption in the environment. For this purpose, a novel anionic heterometallic organic framework, [(CH3)2NH2][CaEu(CAM)2(H2O)2]·4H2O·4DMF (CaEuCAM), hydrothermally synthesized based on chelidamic acid (H3CAM). Single crystal analysis shows that CaEuCAM features two different oxygen-rich channels along c-axis which one CAM3– bridges sextuple-coordinated Ca2+ octuple-coordinated Eu3+ with μ4-η1: η1: η1 new chelating bridging mode. The characteristic bright red emission superior hydrostability of under harsh acidic basic conditions benefit by acting as highly sensitive sensor Fe3+ 3-nitrophenol (3-NP) extremely low LODs through remarkable quenching. combination experiments theoretical calculations sensing mechanisms competitive absorption interaction are responsible Fe3+-induced selective quenching, while 3-NP result synergism host–guest chemistry inner filter effect. Meanwhile, assimilation negative charge plus renders adsorbent methylene blue (MB) due synergy electrostatic affinity, ion-dipole interaction, size matching. Of note reusability toward Fe3+/3-NP MB besides its fast response. These findings could be very useful guiding development Ln-MOFs applications water media.

Language: Английский

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A dual-color ratiometric fluorescence sensor of biogenic amines with dye encapsulated covalent organic framework for meat freshness

LWT, Journal Year: 2024, Volume and Issue: unknown, P. 116788 - 116788

Published: Sept. 1, 2024

Language: Английский

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A pH-responsive dual-emission composite for fast detection of BAs and visual monitoring seafood freshness with large luminescence color difference

Talanta, Journal Year: 2024, Volume and Issue: 282, P. 126946 - 126946

Published: Sept. 30, 2024

Language: Английский

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Sequential Stimuli‐Response System of Eu‐MOF Isomers

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Abstract Multiple stimuli‐responsive materials hold excellent potential for the next generation smart owing to their unique response external stimuli, providing a powerful impetus development of intelligent optical devices. The behavior common multiple are independent each other, causing lack multiplicity and identification information technology, which is easy decode. Herein, QIPA‐Eu‐1 QIPA‐Eu‐2 isomers were prepared from QIPA EuCl 3 ·6H 2 O in different solvent thermal conditions building sequential stimuli‐response (SSR) system. Solvent‐driven structural transformations into QIPA‐Eu‐3 occurred, along with color change fluorescence emission variation ascribed aggregates. Furthermore, displayed photochromic behaviors. Combining theoretical calculation well‐defined experiments reveal mechanism, it was found that light drove dihedral angles between quinoline nucleus adjacent benzene rings Finally, on basis stimuli‐induced stepwise responsive QIPA‐Eu‐1, logic gate time‐dependent dynamic anti‐counterfeiting pattern successfully constructed. This study provided new perspective design construction SSR system, showed promising fields data transmission encryption.

Language: Английский

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Recent studies of metal-organic frameworks as meat freshness sensors

Microchemical Journal, Journal Year: 2025, Volume and Issue: 212, P. 113184 - 113184

Published: Feb. 27, 2025

Language: Английский

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Investigation of Metal-Organic Frameworks (MOFs): Synthesis, Properties, and Applications - An In-Depth Review

Chemical Physics Impact, Journal Year: 2025, Volume and Issue: unknown, P. 100864 - 100864

Published: March 1, 2025

Language: Английский

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Metal‐polyphenol Multistage Competitive Coordination System for Colorimetric Monitoring Meat Freshness

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract A low‐cost, high‐precision, and secure real‐time system for monitoring food freshness can significantly improve spoilage issues, yet traditional colorimetric sensor arrays often suffer from chemical dyes’ high toxicity limited color changes. Here, a metal‐polyphenol network array (MPN‐CSA) is built detecting total volatile base nitrogen (TVB‐N) markers of meat freshness. The multi‐level competitive coordination process between the amine substances endows with changes far beyond those dyes (reaching detection limit 300 ppb). By integrating convolutional neural (CNN) technology, an online platform developed freshness, achieving overall accuracy rate 99.83%. This environmentally friendly, economically viable MPN‐CSA that monitors in complex storage environments be incorporated into packaging boxes, enabling consumers suppliers to assess real‐time, thus helping reduce waste prevent foodborne illnesses.

Language: Английский

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Tetranuclear Cluster-Based Eu(III)-Metal–Organic Framework: Ratiometric Platform Design and Ultrasensitive Phenylglyoxylic Acid Detection

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(44), P. 51796 - 51805

Published: Oct. 25, 2023

Phenylglyoxalic acid (PGA) is a typical metabolite produced by the invasion of styrene into human body. The detection PGA can not only reflect health status body but also assess level contamination in environment. Herein, novel Eu(III)-MOF (Eu-ttpd) with excellent fluorescence properties was designed employing tetrazole-based ligand 5-((4′-(tetrazol-5′-yl)benzyl)oxy) isophthalic (H2ttpd), which successfully used fluorescent sensor for PGA. as-synthesized Eu-ttpd features unique 10-connected tetranuclear cluster [Eu4(μ3-O)2(COO)8]4+ and exhibits (3,10)-connected topological. Benefiting from perfectly matched excited-state energy levels employed H2ttpd PGA, rapid photoinduced electron transfer (PET) Dexter-ET occur, entitle fast quenching response to remarkable LOD 0.269 μM. More importantly, integrating Mg,N-CDs polyacrylamide hydrogel, we optimized hydrogel exhibited enhanced ability (LOD = 0.052 μM) accompanied distinguished color transformation (red-to-blue) realized ultrasensitive visual This work offers an indication development smart sensing materials environmental safety.

Language: Английский

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