Luminescent 3D homochiral coordination polymers of europium(III) and terbium(III) based on amino acid-functionalized isophthalic acid

doi:10.1016/j.inoche.2020.108049

Inorganic Chemistry Communications

Volume 119, September 2020, 108049

https://doi.org/10.1016/j.inoche.2020.108049 Get rights and content

Highlights

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Purely chiral fluorescent tricarboxylic ligand.
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Lanthanide-based homochiral metal-organic frameworks.
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Optical properties including CD spectra and luminescent properties.

Abstract

The use of purely chiral fluorescent tricarboxylic ligand (S)-5-(((1-carboxy-2-phenylethyl)amino)methyl)isophthalic acid (H₃L) led to isostructural lanthanide-based homochiral metal-organic frameworks, [EuCl(HL)]_n (1) and [TbCl(HL)]_n (2), in which every zwitterionic ligand HL connects five metal ions and metal nodes Eu³⁺ and Tb³⁺ adopt eight- and seven-coordinated modes, respectively. They are 5-connected novel 3D homochiral coordination polymers consisting of interesting triple-stranded helixes and display the strong characteristic emissions corresponding to Eu³⁺ and Tb³⁺. Both 1 and 2 exhibit high thermal stability, which was demonstrated by TGA. In addition, the chiroptical activity of 1 and 2 was also investigated by CD spectra.

Graphical abstract

The use of purely chiral fluorescent tricarboxylic ligand (S)-5-(((1-carboxy-2-phenylethyl)amino)methyl)isophthalic acid led to two luminescent novel 3D homochiral coordination polymers of europium(III) and terbium(III).

Section snippets

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgements

We gratefully acknowledge financial support from the National Natural Science Foundation of China (21271157), the Key Scientific Research Projects of Colleges and Universities in Henan Province (20A150007), and the Key R & D and Promotion Projects in Henan Province (202102210008).

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Therefore, rational design and synthesis of HMOFs has become a hot spot in the past several years, and many spectacular HMOFs have been reported [6–8]. Several prime methodologies, including the usage of chiral ligand, asymmetrical inductive crystallization from achiral precursors in the presence of enantiopure reagents and post-synthetic modification of achiral frameworks with chiral blocks have been developed to construct HMOFs through year's efforts [9–13]. But all these methods involve enantiopure agents, which bring about some downsides such as high cost, limited avail ability and possibility of in situ ligand racemization[14–15].
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Citation Excerpt :
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Homochiral Metallohelicates Based on Zinc(II) and Cadmium(II) Clusters with Excellent Thermostability and Remarkable Second-Harmonic Generation
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Short communicationLuminescent 3D homochiral coordination polymers of europium(III) and terbium(III) based on amino acid-functionalized isophthalic acid

Highlights

Abstract

Graphical abstract

Section snippets

Declaration of Competing Interest

Acknowledgements

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Short communication
Luminescent 3D homochiral coordination polymers of europium(III) and terbium(III) based on amino acid-functionalized isophthalic acid

Bin Zhao, 3d–4f Heterometal-organic frameworks for efficient capture and conversion of CO₂

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