Recent advances in luminescent metal-organic frameworks for chemical sensors

He, Jie; Xu, Jialiang; Yin, Jun; Li, Na; Bu, Xian‐He

doi:10.1007/s40843-019-1169-9

Cited by 144 publications

(62 citation statements)

References 129 publications

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“…11) with calculated limit of detection (LOD) values of 55 μM and 162 μM for Fe 3+ and Cu 2+ ions, respectively. Note that, despite the relatively high LODs, the estimated K sv value for Fe 3+ detection can be considered quite promising compared to other reported MOFs with characteristic iron sensing capacity, usually exhibiting values within the 10 4 -10 5 range 19,60,61 , among which the K sv = 2.67 10 5 M -1 reported for the MOF of {[(CH 3 ) 2 NH 2 ] 6 [Cd 3 L(H 2 O) 2 ]•12H 2 O} n formula deserves to be mentioned 62 . In this regard, despite the dominant dynamic quenching observed for these ions (in view of their large K sv ), significant static quenching may be claimed for Fe 3+ according to the non-linear distribution of the plot, a fact that may be explained according to the accessibility of the carboxylate oxygen atoms of 2ain ligands (which are also involved in hydrogen bonding interactions with exocyclic amino groups of neighbouring 2ain ligands) from the microchannels of the MOF.…”

Section: Solvent-dependent Magnetic Behaviour Of Compound 1 Solvent-mentioning

confidence: 82%

Magnetic and Photoluminescent Sensors Based on Metal-Organic Frameworks Built up from 2-aminoisonicotinate

Garcı́a-Valdivia

Pérez‐Yáñez

Garcı́a

et al. 2020

Sci Rep

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In this work, three isostructural metal-organic frameworks based on first row transition metal ions and 2-aminoisonicotinate (2ain) ligands, namely, {[M(μ-2ain) 2 ]•DMf} n [M ii = Co (1), Ni (2), Zn (3)], are evaluated for their sensing capacity of various solvents and metal ions by monitoring the modulation of their magnetic and photoluminescence properties. The crystal structure consists of an open diamond-like topological 3D framework that leaves huge voids, which allows crystallizing twofold interpenetrated architecture that still retains large porosity. Magnetic measurements performed on 1 reveal the occurrence of field-induced spin-glass behaviour characterized by a frequency-independent relaxation. Solvent-exchange experiments lead successfully to the replacement of lattice molecules by DMSo and MeoH, which, on its part, show dominating SiM behaviour with low blocking temperatures but substantially high energy barriers for the reversal of the magnetization. Photoluminescence studied at variable temperature on compound 3 show its capacity to provide bright blue emission under UV excitation, which proceeds through a ligand-centred charge transfer mechanism as confirmed by timedependent DFT calculations. Turn-off and/or shift of the emission is observed for suspensions of 3 in different solvents and aqueous solutions containing metal ions. The multifunctionalization of metal-organic frameworks (MOFs) has recently become one of the main research strategies of inorganic and materials chemistry to guide the construction of materials with sensing capacities 1-3. This is a consequence of the capacity of these materials to allow for multiple physical properties which may coexist or even cooperate in a synergistic way 4,5. As it is well known, MOFs are a class of potentially porous materials comprised of single metal ions or metal ion clusters linked one another by organic ligands to give an extended crystalline architecture 6-8. The variety of metal ions and organic ligands opens up an infinite number of possible combinations which allow designing MOFs almost at will in such a way that their structure responds to a particular commitment 9-15. In particular, the rapid detection of toxic species in environmental and ecological systems is gaining increasing interest because of the large overlap existing between residential and surrounding industrial areas, which already causes many diseases in human being and tends to be expanded in near future 16. For instance, various salts containing Fe 3+ and Cu 2+ ions, usually employed in industry, are eventually found in rivers and streams damaging those ecosystems 17. The same applies for some common solvents referred to as volatile organic compounds (VOCs) that are air and water pollutants and cause severe environmental problems 18. In this regard, MOFs are good candidates to drive the detection of all above mentioned molecules in liquid media owing to their specific functions bearing on the surface of the pores, since they are known to show interactions able to provide a rev...

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Section: Solvent-dependent Magnetic Behaviour Of Compound 1 Solvent-mentioning

confidence: 82%

Magnetic and Photoluminescent Sensors Based on Metal-Organic Frameworks Built up from 2-aminoisonicotinate

Garcı́a-Valdivia

Pérez‐Yáñez

Garcı́a

et al. 2020

Sci Rep

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“…Luminescent MOFs have been widely investigated for chemical sensors. [263][264][265][266][267][268] Zr-MOFs have also been studied for applications including detection, recognition, and sensing on small molecules, anions and cations. The thiadiazolefunctionalized UiO-MOF reported by Eddaoudi and coworkers shows an unprecedented low detection limit of 66 × 10 −9 m for amines in aqueous solutions.…”

Section: Detection Recognition and Sensingmentioning

confidence: 99%

Metal–Organic Frameworks Based on Group 3 and 4 Metals

et al. 2020

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Metal-organic frameworks (MOFs), a class of porous crystalline framework materials, are linked by strong bonds between inorganic and organic building blocks. [1-3] In the past two decades, MOFs have rapidly grown as a star material due to their exceptional performance in areas such as storage, separation and catalysis. [4] The outstanding performance of MOFs in applications benefits from their intrinsically porous structures and highly tunable pore environment. [5-7] The creation and modification of pore space with optimized size, functionality and diversity can be precisely tuned at the molecular level by rationally designing building blocks and synthetic procedures. [8,9] The diversity of MOFs can be enriched by expanding the library of organic linkers with varying lengths, geometries, and functional groups. [10] Additionally, very diverse metal cations are applied to MOF synthesis, ranging from monovalent (Ag + , Cu + , etc.), divalent (Mg 2+ , Fe 2+ , Co 2+ , Ni 2+ , etc.), trivalent (Al 3+ , Sc 3+ , V 3+ , Cr 3+ , etc.), to tetravalent (Ti 4+ , Zr 4+ , Hf 4+ , etc.) cations. [11] In this review, we mainly focus on MOFs with group 3 and 4 metals, including Y, lanthanides (Ln, from La to Lu), actinides (An, from Ac to Lr), Ti, and Zr (Figure 1). Group 3 metal cations are generally found in the oxidation state of +3 in the MOF structures, while group 4 metal cations mainly exist in the oxidation state of +4, leading to the formation of much stronger coordination bonds with carboxylates. [12] Therefore, group 4 metal-based MOFs (M IV-MOFs) generally have enhanced stability compared with MOFs constructed from metals of group 3 and other groups. This series of MOFs stands out because the involved metals can generally coordinate with carboxylates to form frameworks with strong coordination bonds, according to the Pearson's hard/soft acid/base principle, where group 3 and 4 metal cations are regarded as hard acids while carboxylate ligands are hard bases. [11] One remarkable feature of MOFs with group 3 and 4 metals is that they generally can form phases containing M 6 O 8 (M = Y, Ln, An, Zr and Hf) clusters, regardless of their atomic numbers, charges and radius. This series of M 6-based MOFs is best represented by UiO series such as UiO-66 with fcu topology. [13] Under different synthetic conditions, UiO-66(M, M = An, Zr and Hf) constructed from [M 6 (μ 3-O) 4 (μ 3-OH) 4 ] clusters and linear carboxylates can be obtained, while UiO-66(M, M = Y, Ln) is assembled from Metal-organic frameworks (MOFs) based on group 3 and 4 metals are considered as the most promising MOFs for varying practical applications including water adsorption, carbon conversion, and biomedical applications. The relatively strong coordination bonds and versatile coordination modes within these MOFs endow the framework with high chemical stability, diverse structures and topologies, and interesting properties and functions. Herein, the significant progress made on this series of MOFs since 2018 is summarized and an update on the current status an...

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“…Metal–organic frameworks (MOFs) are crystalline porous materials consisting of organic ligands coordinated to metal centers, and are recent innovations in the field of material chemistry [ 1 , 2 ]. MOFs have become a dazzling star among porous materials by virtue of their superior properties and promising applications in gas storage and separation [ 3 , 4 ], energy conversion and storage [ 5 , 6 ], water harvesting and splitting [ 7 , 8 ], heterogeneous catalysis [ 9 , 10 ], chemical sensors [ 11 , 12 ], environmental remediation [ 13 , 14 ], cancer therapy, drug delivery [ 15 , 16 ], etc. Considering their excellent performance, MOFs have great potential for application in the field of sustainable agriculture, especially as versatile pesticide-delivery vehicles.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Modified Metal–Organic Frameworks, NH2-Fe-MIL-101, as pH-Sensitive Nanocarriers for Controlled Pesticide Release

Shan

Zhang

et al. 2020

Nanomaterials

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Recently, metal–organic frameworks (MOFs) have become a dazzling star among porous materials used in many fields. Considering their intriguing features, MOFs have great prospects for application in the field of sustainable agriculture, especially as versatile pesticide-delivery vehicles. However, the study of MOF-based platforms for controlled pesticide release has just begun. Controlled pesticide release responsive to environmental stimuli is highly desirable for decreased agrochemical input, improved control efficacy and diminished adverse effects. In this work, simple, octahedral, iron-based MOFs (NH2-Fe-MIL-101) were synthesized through a microwave-assisted solvothermal method using Fe3+ as the node and 2-aminoterephthalic acid as the organic ligand. Diniconazole (Dini), as a model fungicide, was loaded into NH2-Fe-MIL-101 to afford Dini@NH2-Fe-MIL-101 with a satisfactory loading content of 28.1%. The subsequent polydopamine (PDA) modification could endow Dini with pH-sensitive release patterns. The release of Dini from PDA@Dini@NH2-Fe-MIL-101 was much faster in an acidic medium compared to that in neutral and basic media. Moreover, Dini@NH2-Fe-MIL-101 and PDA@Dini@NH2-Fe-MIL-101 displayed good bioactivities against the pathogenic fungus causing wheat head scab (Fusarium graminearum). This research sought to reveal the feasibility of versatile MOFs as a pesticide-delivery platform in sustainable crop protection.

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Recent advances in luminescent metal-organic frameworks for chemical sensors

Cited by 144 publications

References 129 publications

Magnetic and Photoluminescent Sensors Based on Metal-Organic Frameworks Built up from 2-aminoisonicotinate

Magnetic and Photoluminescent Sensors Based on Metal-Organic Frameworks Built up from 2-aminoisonicotinate

Metal–Organic Frameworks Based on Group 3 and 4 Metals

Polydopamine-Modified Metal–Organic Frameworks, NH2-Fe-MIL-101, as pH-Sensitive Nanocarriers for Controlled Pesticide Release

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