Encapsulation of perovskite quantum dots into a Ln<sup>III</sup>-incorporating polymer matrix to achieve white light emission

Jiang, Minghui; Zhang, Qiang; Zhang, Bao; Feng, Yaqing

doi:10.1039/d1nj05832k

Cited by 2 publications

(1 citation statement)

References 51 publications

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“…46 For the mixtures of Tb 3+ and TerPyTa, in addition to the luminescence emission of the ligand, the other four bands appear at approximately 490, 546, 586, and 622 nm, attributed to the typical fluorescence emissions of Tb 3+ ions from 5 D 4 to 7 F 3−6 transitions. 47,48 This phenomenon suggests that the energy absorbed by the linker of TerPyTa can be partially transferred to the excited state of Tb 3+ and thereby sensitize its luminescence emission. The mixtures of Eu 3+ and TerPyTa were also prepared; however, no typical Eu 3+ ion emission was detected, suggesting that the excited energy of TerPyTa was hardly transferred to the Eu 3+ ions.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction

Liu

Shen

et al. 2023

Langmuir

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Metal-directed interfacial self-assembly of well-defined coordination polymer (CP) ultrathin films can control the metal complex arrangement and distribution at the molecular level, providing a convenient route for the design and fabrication of novel opto-electrical devices and heterogeneous catalysts. Here, we report the assembly of two series of CP multilayers with the transition-metal ions of Fe2+, Co2+, Zn2+ and Tb3+ as connectors and tripodal terpyridyl ligands of 4,4′,4″-(1,3,5-triazine-2,4,6-triyl)tris(1-(4-([2,2′:6′,2″-terpyridin]-4′-yl)benzyl)pyridin-1-ium) (TerPyTa) and 4,4′,4″-(benzene-1,3,5-triyl)tris(1-(4-([2,2′:6′,2″-terpyridin]-4′-yl)benzyl)pyridin-1-ium) (TerPyBen) as linkers at the air–water interface. The as-prepared Langmuir–Blodgett (LB) films display strong luminescence, with the emission wavelength and relative intensity dependent on both the metal ions and linkers; among them, the Zn-TerPyTa and Zn-TerPyBen CPs give off the strongest luminescent emission centered at about 370 nm with an emission lifetime of approximately 0.2–0.3 ns. The Tb-TerPyTa CPs can give off emission at approximately 490, 546, 586, and 622 nm, attributed to the 5D4 to 7F3–6 electron transitions of typical Tb3+ ions. Finally, these CP LB films can act as efficient heterogeneous photocatalysts for the CO2 reduction to selectively produce CO. The catalytic efficiency can be optimized by adjusting the experimental conditions (light sensitizer, electron donor, and water content) and CP composition (metal ion and ligand) with an excellent yield of up to 248.1 mmol g–1. In particular, it is revealed that, under the same conditions, the catalytic efficiency of the Fe-TerPyTa CP LB film is nearly 2 to 3 orders of magnitude higher than that of the other metalated complexes investigated in the homogeneous system. UV–vis spectroscopy and cyclic voltammetry studies demonstrated that the dual active sites of Fe-terpyridine and TerPyTa units contribute to the enhanced catalytic activity. This work provides an effective method to introduce the earth-abundant metal complexes into CP films to construct efficient noble-metal-free photocatalysts for the CO2 reduction.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction

Liu

Shen

et al. 2023

Langmuir

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Enhanced the stability of perovskite quantum dots CsPbBr3 by in-situ growth on nanosheets Kaolin for WLED applications

Zeng

Peng

et al. 2023

Journal of Alloys and Compounds

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Encapsulation of perovskite quantum dots into a Ln^III-incorporating polymer matrix to achieve white light emission

Abstract: All-inorganic perovskite quantum dots (PQDs) with high quantum efficiency and broad spectral tunability showing potential applications in light-emitting diodes (LEDs) are promising luminescent materials. However, poor stability has also become...

Cited by 2 publications

References 51 publications

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction

Enhanced the stability of perovskite quantum dots CsPbBr3 by in-situ growth on nanosheets Kaolin for WLED applications

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Encapsulation of perovskite quantum dots into a LnIII-incorporating polymer matrix to achieve white light emission

Abstract: All-inorganic perovskite quantum dots (PQDs) with high quantum efficiency and broad spectral tunability showing potential applications in light-emitting diodes (LEDs) are promising luminescent materials. However, poor stability has also become...

Cited by 2 publications

References 51 publications

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO2 Reduction

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO2 Reduction

Enhanced the stability of perovskite quantum dots CsPbBr3 by in-situ growth on nanosheets Kaolin for WLED applications

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Product

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About

Encapsulation of perovskite quantum dots into a Ln^III-incorporating polymer matrix to achieve white light emission

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction

Interfacial Self-Assembly of Organized Ultrathin Films of Tripodal Metal-Terpyridyl Coordination Polymers as Luminophores and Heterogeneous Catalysts for Photocatalytic CO₂ Reduction