A stable electron-deficient metal–organic framework for colorimetric and luminescence sensing of phenols and anilines

Gong, Teng; Li, Peng; Sui, Qi; Chen, Jacqueline; Xu, Jianhua; Gao, En‐Qing

doi:10.1039/c8ta02794c

Cited by 131 publications

(70 citation statements)

References 70 publications

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“…The responsive properties were first investigated using the as‐synthesized MOF, which contains chloride as counterion ( LVMOF‐1‐Cl ). It changes color in response to a variety of stimuli ( Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…The combination of viologen and Eu(III) in one MOF opens the possibility of switching or modulating the Eu(III)‐based luminescence through the diverse chemical or physical tools that induce viologen‐based ET response. LVMOF‐1 shows excitation and emission spectra characteristic of Eu(III) f‐f transitions, with 7 F 0 → 5 L 6 (394 nm) and 5 D 0 → 7 F 2 (614 nm), respectively, as the most intense . All of the stimuli that induce the MOF to undergo chromogenic response (water evacuation, photoirradiation after evacuation and in organic solvents, and pressure) can cause significant quenching of the Eu(III) luminescence (Figure e).…”

Section: Resultsmentioning

confidence: 99%

“…Perchlorate has the risk of explosion and should be handled carefully with small amounts . LVMOF‐1 was synthesized by the literature procedures reported by us …”

Section: Methodsmentioning

confidence: 99%

“…The viologen moieties furnishing the channels are ideally spaced (≈7 Å) for sandwiching electron‐rich benzene derivatives through CT interaction, representing an infinite array of Stoddart's “blue box” (a rectangular cyclophane formed by two p‐xylylene groups spacing two viologen groups). We demonstrated that the MOF undergoes sensitive color and luminescence changes in response to phenols and anilines, affording fast and ultratrace sensing in aqueous media . Considering the versatile responsive capabilities of viologen, we presume that the MOF is potentially responsive to various stimuli besides electron‐rich aromatic molecules, such as light, heat, and pressure.…”

Section: Introductionmentioning

confidence: 96%

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Versatile and Switchable Responsive Properties of a Lanthanide‐Viologen Metal–Organic Framework

Gong

Sui

et al. 2019

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Metal–organic frameworks (MOFs) provide intriguing platforms for the design of responsive materials. It is challenging to mobilize as many components as possible of a MOF to collaboratively accomplish multiple responsive properties. Here, reversible photochromism, piezochromism, hydrochromism, ionochromism, and luminescence modulation of an ionic Eu(III) MOF is reported furnished by cationic electron‐deficient viologen units and exchangeable guest anions. Mechanistically, the extraordinarily versatile responsive properties are owed to electron transfer (ET), charge transfer (CT), and energy transfer, involving viologen as electron acceptor, anion as electron donor, luminescing Eu(III) as energy donor, and anion‐viologen CT complex or ET‐generated radical as energy acceptor (luminescence quencher). Moreover, guest anions and waters provide flexible handles to control the ET‐based responsive properties. Water release/reuptake or exchange with organic solvents can switch on/off the response to light, while reversible anion exchange can disenable or awaken the responses to pressure, light, and water release/reuptake. The impacts of water and anions on ET are justified by the high polarity and hydrogen‐bonding capability of water, the different electron donor strength of anions, and the strong I−‐viologen CT interactions. The rich responsive behaviors have great implications for applications such as pressure sensors, iodide detection, and chemical logic gates.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Perchlorate has the risk of explosion and should be handled carefully with small amounts . LVMOF‐1 was synthesized by the literature procedures reported by us …”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Versatile and Switchable Responsive Properties of a Lanthanide‐Viologen Metal–Organic Framework

Gong

Sui

et al. 2019

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“…LVMOF-1 [216] is a kind of 3D MOFs with the ability to sense electron-rich benzene derivatives. LVMOF-1 has outstanding chemical stability to enable color and luminescence responsive to phenol synchronously.…”

Section: Persistent Organic Pollutantsmentioning

confidence: 99%

Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

et al. 2020

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The high speed of contaminants growth needs the burgeoning of new analytical techniques to keep up with the continuous demand for monitoring and legislation on food safety and environmental pollution control. Metal-organic frameworks (MOFs) are a kind of advanced crystal porous materials with controllable apertures, which are self-assembled by organic ligands and inorganic metal nodes. They have the merits of large specific surface areas, high porosity and the diversity of structures and functions. Latterly, the utilization of metal-organic frameworks has attracted much attention in environmental protection and the food industry. MOFs have exhibited great value as sensing materials for many targets. Among many sensing methods, fluorometric sensing is one of the widely studied methods in the detection of harmful substances in food and environmental samples. Fluorometric detection based on MOFs and its functional materials is currently one of the most key research subjects in the food and environmental fields. It has gradually become a hot research direction to construct the highly sensitive rapid sensors to detect harmful substances in the food matrix based on metal-organic frameworks. In this paper, we introduced the synthesis and detection application characteristics (absorption, fluorescence, etc.) of metal-organic frameworks. We summarized their applications in the MOFs-based fluorometric detection of harmful substances in food and water over the past few years. The harmful substances mainly include heavy metals, organic pollutants and other small molecules, etc. On this basis, the future development and possible application of the MOFs have prospected in this review paper.

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Imidazolium and Pyridinium Decorated Metal‐Organic Frameworks

2020

Functional Metal‐Organic Frameworks

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A stable electron-deficient metal–organic framework for colorimetric and luminescence sensing of phenols and anilines

Abstract: A Eu3+ MOF with ideally spaced electron-deficient viologen moieties is capable of highly sensitive colorimetric/luminescence detection of electron-rich aromatic contaminants in water through charge transfer and resonance energy transfer.

Cited by 131 publications

References 70 publications

Versatile and Switchable Responsive Properties of a Lanthanide‐Viologen Metal–Organic Framework

Versatile and Switchable Responsive Properties of a Lanthanide‐Viologen Metal–Organic Framework

Recent Progress on Luminescent Metal-Organic Framework-Involved Hybrid Materials for Rapid Determination of Contaminants in Environment and Food

Imidazolium and Pyridinium Decorated Metal‐Organic Frameworks

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