Mixed-Lanthanide Metal–Organic Frameworks with Tunable Color and White Light Emission

Gai, Yanli; Guo, Qin; Xiong, Kecai; Jiang, Feilong; Li, Chenyuan; Li, Xin; Chen, Yan; Zhu, Changsheng; Huang, Qing; Yao, Rui; Hong, Maochun

doi:10.1021/acs.cgd.6b01541

Cited by 66 publications

(32 citation statements)

References 49 publications

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“…These differ from prior literature studies 26,45 , since the characteristic emission intensity of Eu 3+ (616 nm) and Tb 3+ (547 nm) ions in bimetallic Eu 0. 47 Tb 0.63 -CTP-COOH highly depends on various guests (metal ions and VOCs).…”

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confidence: 99%

Versatile bimetallic lanthanide metal-organic frameworks for tunable emission and efficient fluorescence sensing

et al. 2018

Commun Chem

186

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Developing novel lanthanide metal-organic frameworks (Ln-MOFs) to rapidly and reliably differentiate both metal ions in solution and volatile organic compounds (VOCs) in vapor is highly challenging. Here, we describe versatile Eu 3+ /Tb 3+ -MOFs based on a flexible ligand. It is noteworthy that the film fabricated using bimetallic Eu 0.47 Tb 0.63 -MOF and polyvinyl alcohol could serve as an easy and convenient luminescent platform for distinguishing different metal ions and VOCs. The luminescent film exhibits notable fingerprint correlation between the metal ions/VOCs and the emission intensity ratio of Eu 3+ /Tb 3+ ions in Ln-MOFs. As a result, the bimetallic Ln-MOFs show fast recognition of Fe 3+ ion with a response time of <10 s, and can effectively probe styrene vapor within 4 min. Since the developed Ln-MOF film is stable and reliable, this work presents a promising strategy to explore luminescent platforms capable of effectively sensing different metal ions and VOCs.

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confidence: 99%

Versatile bimetallic lanthanide metal-organic frameworks for tunable emission and efficient fluorescence sensing

et al. 2018

Commun Chem

186

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“…[36][37] It has been demonstrated that, because of their similar chemical behaviors, [38][39] it is possible to design series of hetero-lanthanide coordination polymers in which lanthanide ions are randomly distributed over the metallic sites of the crystal structure. [40][41][42][43][44][45][46] Consequently, it is possible to tune the intensity and the color of the emission of these systems (sometimes called "molecular alloys" 47 ) by varying the relative contents of the different lanthanide ions. Indeed, inter-metallic energy transfers efficiency drastically decreases with the inter-metallic distance and it is commonly admitted that they become negligible when lanthanide ions are more than 10 Å far from each other.…”

Section: Introductionmentioning

confidence: 99%

Multi-Emissive Lanthanide-Based Coordination Polymers for Potential Application as Luminescent Bar-Codes

et al. 2019

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Isostructural lanthanide-based coordination polymers that are obtained by reactions in water of a lanthanide chloride and the sodium salt of 5-methoxyisophthalate (mip 2− ) have the general chemical formula [Ln 2 (mip) 3 (H 2 O) 8 •4H 2 O] ∞ with Ln = Nd−Er except Pm plus Y (symbolized by [Ln 2 (mip) 3 ] ∞ ). Some of these homo-lanthanide compounds present very high luminescence brightness. The weak intermetallic energy transfer between lanthanide ions observed in these compounds allows the design of hetero-lanthanide coordination polymers with tunable luminescence properties. A molecular alloy that involved six different lanthanide ions (Nd 3+ , Sm 3+ , Eu 3+ , Gd 3+ , Tb 3+ , Dy 3+ ) has been prepared and its luminescent properties have been studied. This compound, under a unique irradiation wavelength (λ exc = 325 nm), exhibits almost 20 emission peaks in both the visible and the NIR regions at room temperature. This unprecedented richness of the emission spectrum could be of great interest as far as luminescent barcodes are targeted.

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“…The presence of Ln-doped materials in phosphors for cathode ray tubes (CRTs), plasma displays, and so-called fluorescent light bulbs certainly comforts this claim. Ln-based luminescent materials are also particularly suited for producing trichromic light emissions (red, green, blue aka RGB systems) by mixing different Ln ions, mostly due to the purity of the Eu(III), Tb(III), and Eu(II) red, green, and blue characteristic emissions [ 7 , 8 , 9 , 10 ]. Most Ln-based phosphors are composed of inorganic materials, but organic complexes or metal–organic frameworks (MOFs) show growing interests for organic light-emitting diodes (OLEDs) due to the larger derivatisation ability and variations of chemical structures [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Colorimetry of Luminescent Lanthanide Complexes

Andrès

Chauvin

2020

Molecules

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Europium, terbium, dysprosium, and samarium are the main trivalent lanthanide ions emitting in the visible spectrum. In this work, the potential of these ions for colorimetric applications and colour reproduction was studied. The conversion of spectral data to colour coordinates was undertaken for three sets of Ln complexes composed of different ligands. We showed that Eu is the most sensitive of the visible Ln ions, regarding ligand-induced colour shifts, due to its hypersensitive transition. Further investigation on the spectral bandwidth of the emission detector, on the wavelengths’ accuracy, on the instrumental correction function, and on the use of incorrect intensity units confirm that the instrumental correction function is the most important spectrophotometric parameter to take into account in order to produce accurate colour values. Finally, we established and discussed the entire colour range (gamut) that can be generated by combining a red-emitting Eu complex with a green-emitting Tb complex and a blue fluorescent compound. The importance of choosing a proper white point is demonstrated. The potential of using different sets of complexes with different spectral fingerprints in order to obtain metameric colours suitable for anti-counterfeiting is also highlighted. This work answers many questions that could arise during a colorimetric analysis of luminescent probes.

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Mixed-Lanthanide Metal–Organic Frameworks with Tunable Color and White Light Emission

Cited by 66 publications

References 49 publications

Versatile bimetallic lanthanide metal-organic frameworks for tunable emission and efficient fluorescence sensing

Versatile bimetallic lanthanide metal-organic frameworks for tunable emission and efficient fluorescence sensing

Multi-Emissive Lanthanide-Based Coordination Polymers for Potential Application as Luminescent Bar-Codes

Colorimetry of Luminescent Lanthanide Complexes

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