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Hyperpolarized Xe NMR signal advancement by metal-organic framework entrapment in aqueous solution

by Guo, Qianni , Liu, Maili , Zhang, Xu , Han, Qi , Zhou, Xin , Chen, Mingwei , Zeng, Qingbin , Deng, Hexiang , Liu, Pan , Bie, Binglin , Han, Xiaocang , Yang, Yunhuang , Yuan, Yaping

in Aqueous solutions / Chemical equilibrium / Chemistry / Entrapment / Imidazole / Metal-organic frameworks / NMR / Nuclear magnetic resonance / Physical Sciences / Xenon 129

2020

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Hyperpolarized Xe NMR signal advancement by metal-organic framework entrapment in aqueous solution

by Guo, Qianni , Liu, Maili , Zhang, Xu , Han, Qi , Zhou, Xin , Chen, Mingwei , Zeng, Qingbin , Deng, Hexiang , Liu, Pan , Bie, Binglin , Han, Xiaocang , Yang, Yunhuang , Yuan, Yaping

in Aqueous solutions / Chemical equilibrium / Chemistry / Entrapment / Imidazole / Metal-organic frameworks / NMR / Nuclear magnetic resonance / Physical Sciences / Xenon 129

2020

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Hyperpolarized Xe NMR signal advancement by metal-organic framework entrapment in aqueous solution

by Guo, Qianni , Liu, Maili , Zhang, Xu , Han, Qi , Zhou, Xin , Chen, Mingwei , Zeng, Qingbin , Deng, Hexiang , Liu, Pan , Bie, Binglin , Han, Xiaocang , Yang, Yunhuang , Yuan, Yaping

in Aqueous solutions / Chemical equilibrium / Chemistry / Entrapment / Imidazole / Metal-organic frameworks / NMR / Nuclear magnetic resonance / Physical Sciences / Xenon 129

2020

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Journal Article

Hyperpolarized Xe NMR signal advancement by metal-organic framework entrapment in aqueous solution

Guo, Qianni,

Liu, Maili,

Zhang, Xu,

Han, Qi,

Zhou, Xin,

Chen, Mingwei,

Zeng, Qingbin,

Deng, Hexiang,

Liu, Pan,

Bie, Binglin,

Han, Xiaocang,

Yang, Yunhuang,

Yuan, Yaping

2020

Overview

We report hyperpolarized Xe signal advancement by metal-organic framework (MOF) entrapment (Hyper-SAME) in aqueous solution. The 129Xe NMR signal is drastically promoted by entrapping the Xe into the pores of MOFs. The chemical shift of entrapped 129Xe is clearly distinguishable from that of free 129Xe in water, due to the surface and pore environment of MOFs. The influences from the crystal size of MOFs and their concentration in water are studied. A zinc imidazole MOF, zeolitic imidazole framework-8 (ZIF-8), with particle size of 110 nm at a concentration of 100 mg/mL, was used to give an NMR signal with intensity four times that of free 129Xe in water. Additionally, Hyper-SAME is compatible with hyperpolarized 129Xe chemical exchange saturation transfer. The 129Xe NMR signal can be amplified further by combining the two techniques. More importantly, Hyper-SAME provides a way to make detection of hyperpolarized 129Xe in aqueous solution convenient and broadens the application area of MOFs.

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Publisher

National Academy of Sciences

Subject

Aqueous solutions

/ Chemical equilibrium

/ Chemistry

/ Entrapment

/ Imidazole

/ Metal-organic frameworks

/ NMR