Eu3+ or Sm3+-Doped terbium-trimesic acid MOFs: Highly efficient energy transfer anhydrous luminophors

Silva, I. G. N; Cunha, C. S.; Morais, Alysson Ferreira; Brito, Hermi F.; Mustafa, Danilo

doi:10.1016/j.optmat.2018.06.065

Cited by 19 publications

(9 citation statements)

References 24 publications

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“…The authors attributed their unprecedented long-lived emission to the efficient TTET-based sensitization achieved through high ISC efficiency of the Cd II -MOF antenna system compared to any Zn II -based MOF matrix. Mudring and co-workers, and Mustafa and co-workers also investigated, independently, the linker-to-guest TTET with Ln-doped MIL-78 (Gd) and Eu-doped MIL-78 (Re) MOF systems, respectively. , …”

Section: Energy Transfer In Metal–organic Frameworkmentioning

confidence: 99%

“…Mudring and co-workers, and Mustafa and co-workers also investigated, independently, the linker-to-guest TTET with Ln-doped MIL-78 (Gd) and Eu-doped MIL-78 (Re) MOF systems, respectively. 37,38 Triplet−triplet-annihilation (TTA) within MOFs have also been investigated to realize photon energy upconversion (UC) processes. H.-C. Zhou and co-workers reported a Zr 6 IV -oxobased mixed ligand MOF, where an excited Pd-TCPP-based T 1 state transfers its energy to populate the T 1 state of the diphenyl anthracene derived linker, DCDPA.…”

Section: Frameworkmentioning

confidence: 99%

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Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Deria

2018

ACS Sustainable Chem. Eng.

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Molecular assemblies in metal−organic frameworks (MOFs) have the potential to be considered as functional artificial light-harvesting (LH) system with features similar to the natural LH machinery. With large photon absorptivity, the frameworks provide novel energy-transfer pathways enabling long-distance energy migration both in singlet and triplet manifolds. Furthermore, considering the eventual energy conversion utility, various strategies have been explored to achieve long-lived excited states and integration of photochemical "reaction-centers". Understanding the excited state properties, such as exciton size, delocalization length, and dynamics within MOF-based compositions as a function of their underlying topological-net can help to implement new strategies with improved LH utility. This paper summarizes the various unique photophysical process and elucidates how their structural parameters play a critical role in defining the photophysical processes within MOF structures with a particular emphasis on the robust Zr 6 IV -oxo node derived frameworks as future compositions.

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Section: Energy Transfer In Metal–organic Frameworkmentioning

confidence: 99%

Section: Frameworkmentioning

confidence: 99%

Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Deria

2018

ACS Sustainable Chem. Eng.

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“…The symmetric and asymmetric vibrational modes of the carboxylate groups are observed at 1385 and 1630 cm –1 , respectively. 49 The large difference Δ = 245 cm –1 , similar to that of the sodic salt, combined with the splitting in the ν s band, suggests a mixed bridging bidentate and chelate coordination for the isophthalate interlayer anion. For the carboxylate groups of NTA, the narrow absorption peaks observed in Na 3 NTA appear broaden in the spectra of LDH-NTA, which could suggest the existence of more than one coordination mode for these anions.…”

Section: Resultsmentioning

confidence: 95%

Coordination of Eu³⁺ Activators in ZnAlEu Layered Double Hydroxides Intercalated by Isophthalate and Nitrilotriacetate

et al. 2020

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Luminescent layered double hydroxides (LDH) intercalated by isophthalate (ISO) and nitrilotriacetate (NTA) have been synthesized and characterized by powder X-ray diffraction (PXRD), extended X-ray absorption fine structure (EXAFS), elemental analysis (ICP-OES and CHN), and photoluminescence spectroscopy. While PXRD shows the successful formation of ZnAlEu LDHs, EXAFS reveals that the Eu activators are hosted in the hydroxide layers with an eightfold, oxygen-rich coordination, distinct from the sixfold coordination expected for the octahedral sites of metal cations in LDHs. This kind of coordination should locally distort the brucite-like layers. Additionally, the intercalation of ISO and NTA in the LDHs is shown to change the coordination environment around Eu compared to nitrate-intercalated ZnAlEu LDHs, which suggests that these anions directly interact with the Eu centers and/or strongly affect their coordination geometry. Finally, from the photoluminescence results, analyzed based on the Judd–Ofelt theory, it is determined that Eu is most likely in an environment with no inversion symmetry.

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“…By calcining ZnAlEu-NO3 LDH at 350 °C, i.e., above the second mass loss event in the thermogravimetric analysis (Figure 3), the material was converted into ZnO-like crystals, exhibiting no signs of segregation of crystalline Al2O3 or Eu2O3 [33]. Some authors attribute the absence of diffraction lines for Al2O3 or Eu2O3 to the formation of a ZnO-based solid solution embedding the trivalent ions [34][35][36]. Even upon calcination at 600 °C, no indication for Al2O3 or Eu2O3 could be observed.…”

Section: Resultsmentioning

confidence: 99%

Luminescent Layered Double Hydroxides Intercalated with an Anionic Photosensitizer via the Memory Effect

et al. 2019

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Layered double hydroxides (LDHs) containing Eu 3+ activators were synthesized by coprecipitation of Zn 2+ , Al 3+ , and Eu 3+ in alkaline NO 3 − -rich aqueous solution. Upon calcination, these materials transform into a crystalline ZnO solid solution containing Al and Eu. For suitably low calcination temperatures, this phase can be restored to LDH by rehydration in water, a feature known as the memory effect. During rehydration of an LDH, new anionic species can be intercalated and functionalized, obtaining desired physicochemical properties. This work explores the memory effect as a route to produce luminescent LDHs intercalated with 1,3,5-benzenetricarboxylic acid (BTC), a known anionic photosensitizer for Eu 3+ . Time-dependent hydration of calcined LDHs in a BTC-rich aqueous solution resulted in the recovery of the lamellar phase and in the intercalation with BTC. The interaction of this photosensitizer with Eu 3+ in the recovered hydroxide layers gave rise to efficient energy transfer from the BTC antennae to the Eu 3+ ions, providing a useful tool to monitor the rehydration process of the calcined LDHs.

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Eu3+ or Sm3+-Doped terbium-trimesic acid MOFs: Highly efficient energy transfer anhydrous luminophors

Cited by 19 publications

References 24 publications

Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Coordination of Eu³⁺ Activators in ZnAlEu Layered Double Hydroxides Intercalated by Isophthalate and Nitrilotriacetate

Luminescent Layered Double Hydroxides Intercalated with an Anionic Photosensitizer via the Memory Effect

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Eu3+ or Sm3+-Doped terbium-trimesic acid MOFs: Highly efficient energy transfer anhydrous luminophors

Cited by 19 publications

References 24 publications

Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Light-Harvesting in Porous Crystalline Compositions: Where We Stand toward Robust Metal–Organic Frameworks

Coordination of Eu3+ Activators in ZnAlEu Layered Double Hydroxides Intercalated by Isophthalate and Nitrilotriacetate

Luminescent Layered Double Hydroxides Intercalated with an Anionic Photosensitizer via the Memory Effect

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Coordination of Eu³⁺ Activators in ZnAlEu Layered Double Hydroxides Intercalated by Isophthalate and Nitrilotriacetate