Two novel mixed Eu3+/Y3+ Ln MOFs: Influence of pH on the topology, Eu/Y ratio and energy transfer

Yu Zhang; Weiwei Ju; Xiao Xu; Yun Lv; Dunru Zhu; Yan Xu

doi:10.1039/c4ce00513a

Two novel mixed Eu³⁺/Y³⁺ Ln MOFs: Influence of pH on the topology, Eu/Y ratio and energy transfer

Yu Zhang, Weiwei Ju, Xiao Xu, Yun Lv, Dunru Zhu, Yan Xu

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Two interesting mixed Eu³⁺/Y³⁺ lanthanide metal-organic frameworks, formulated as [EuY₂(H₂O) ₆(IN)₃(ox)₃]·H₂O (1) and Eu_3.5Y_4.5(μ₂-OH)₈(IN) ₈(ox)₄ (2) (HIN = isonicotinic acid; H₂ox = oxalic acid), have been hydrothermally synthesized under the same initial reaction conditions except pH values. Such mixed Ln MOFs which contain two types of ligands are quite novel, and the pH value largely affects the topologies and Eu/Y ratios of the two compounds. Compound 1 exhibits a two-dimensional (2D) layered structure which is built up of [Ln₂IN₂] ⁴⁺ units connected by oxalate ligands with a Eu/Y ratio of about 1 : 2, while in 2, the 2D Ln-ox metal-organic layers are connected by IN^- ligands to give rise to a 3D framework with a Eu/Y ratio of about 1 : 1.3. Moreover, the photoluminescence properties of the two compounds indicate that fluorescence intensity of 1 is much greater than that of 2 due to the different levels of energy transfer and coordination environment.

Original language	English
Pages (from-to)	5681-5688
Number of pages	8
Journal	CrystEngComm
Volume	16
Issue number	25
DOIs	https://doi.org/10.1039/c4ce00513a
State	Published - 7 Jul 2014

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title = "Two novel mixed Eu3+/Y3+ Ln MOFs: Influence of pH on the topology, Eu/Y ratio and energy transfer",

abstract = "Two interesting mixed Eu3+/Y3+ lanthanide metal-organic frameworks, formulated as [EuY2(H2O) 6(IN)3(ox)3]·H2O (1) and Eu3.5Y4.5(μ2-OH)8(IN) 8(ox)4 (2) (HIN = isonicotinic acid; H2ox = oxalic acid), have been hydrothermally synthesized under the same initial reaction conditions except pH values. Such mixed Ln MOFs which contain two types of ligands are quite novel, and the pH value largely affects the topologies and Eu/Y ratios of the two compounds. Compound 1 exhibits a two-dimensional (2D) layered structure which is built up of [Ln2IN2] 4+ units connected by oxalate ligands with a Eu/Y ratio of about 1 : 2, while in 2, the 2D Ln-ox metal-organic layers are connected by IN- ligands to give rise to a 3D framework with a Eu/Y ratio of about 1 : 1.3. Moreover, the photoluminescence properties of the two compounds indicate that fluorescence intensity of 1 is much greater than that of 2 due to the different levels of energy transfer and coordination environment.",

author = "Yu Zhang and Weiwei Ju and Xiao Xu and Yun Lv and Dunru Zhu and Yan Xu",

year = "2014",

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doi = "10.1039/c4ce00513a",

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T2 - Influence of pH on the topology, Eu/Y ratio and energy transfer

AU - Zhang, Yu

AU - Ju, Weiwei

AU - Xu, Xiao

AU - Lv, Yun

AU - Zhu, Dunru

AU - Xu, Yan

PY - 2014/7/7

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N2 - Two interesting mixed Eu3+/Y3+ lanthanide metal-organic frameworks, formulated as [EuY2(H2O) 6(IN)3(ox)3]·H2O (1) and Eu3.5Y4.5(μ2-OH)8(IN) 8(ox)4 (2) (HIN = isonicotinic acid; H2ox = oxalic acid), have been hydrothermally synthesized under the same initial reaction conditions except pH values. Such mixed Ln MOFs which contain two types of ligands are quite novel, and the pH value largely affects the topologies and Eu/Y ratios of the two compounds. Compound 1 exhibits a two-dimensional (2D) layered structure which is built up of [Ln2IN2] 4+ units connected by oxalate ligands with a Eu/Y ratio of about 1 : 2, while in 2, the 2D Ln-ox metal-organic layers are connected by IN- ligands to give rise to a 3D framework with a Eu/Y ratio of about 1 : 1.3. Moreover, the photoluminescence properties of the two compounds indicate that fluorescence intensity of 1 is much greater than that of 2 due to the different levels of energy transfer and coordination environment.

AB - Two interesting mixed Eu3+/Y3+ lanthanide metal-organic frameworks, formulated as [EuY2(H2O) 6(IN)3(ox)3]·H2O (1) and Eu3.5Y4.5(μ2-OH)8(IN) 8(ox)4 (2) (HIN = isonicotinic acid; H2ox = oxalic acid), have been hydrothermally synthesized under the same initial reaction conditions except pH values. Such mixed Ln MOFs which contain two types of ligands are quite novel, and the pH value largely affects the topologies and Eu/Y ratios of the two compounds. Compound 1 exhibits a two-dimensional (2D) layered structure which is built up of [Ln2IN2] 4+ units connected by oxalate ligands with a Eu/Y ratio of about 1 : 2, while in 2, the 2D Ln-ox metal-organic layers are connected by IN- ligands to give rise to a 3D framework with a Eu/Y ratio of about 1 : 1.3. Moreover, the photoluminescence properties of the two compounds indicate that fluorescence intensity of 1 is much greater than that of 2 due to the different levels of energy transfer and coordination environment.

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Two novel mixed Eu³⁺/Y³⁺ Ln MOFs: Influence of pH on the topology, Eu/Y ratio and energy transfer

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