Dynamic Nuclear Polarization of Metal-Organic Frameworks Using Photoexcited Triplet Electrons

Saiya Fujiwara; Masanori Hosoyamada; Kenichiro Tateishi; Tomohiro Uesaka; Keiko Ideta; Nobuo Kimizuka; Nobuhiro Yanai

doi:10.1021/jacs.8b10121

Dynamic Nuclear Polarization of Metal-Organic Frameworks Using Photoexcited Triplet Electrons

Saiya Fujiwara, Masanori Hosoyamada, Kenichiro Tateishi, Tomohiro Uesaka, Keiko Ideta, Nobuo Kimizuka, Nobuhiro Yanai

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

24 Citations (Scopus)

Abstract

While dynamic nuclear polarization based on photoexcited triplet electrons (triplet-DNP) has the potential to hyperpolarize nuclear spins of target substrates in the low magnetic field at room temperature, there has been no triplet-DNP system offering structural rigidity and substrate accessibility. Here, we report the first example of triplet-DNP of nanoporous metal-organic frameworks. Accommodation of a carboxylate-modified pentacene derivative in a partially deuterated ZIF-8 (D-ZIF-8) results in a clear ¹H NMR signal enhancement over thermal equilibrium.

Original language	English
Pages (from-to)	15606-15610
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	140
Issue number	46
DOIs	https://doi.org/10.1021/jacs.8b10121
Publication status	Published - Nov 21 2018

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/jacs.8b10121

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title = "Dynamic Nuclear Polarization of Metal-Organic Frameworks Using Photoexcited Triplet Electrons",

abstract = "While dynamic nuclear polarization based on photoexcited triplet electrons (triplet-DNP) has the potential to hyperpolarize nuclear spins of target substrates in the low magnetic field at room temperature, there has been no triplet-DNP system offering structural rigidity and substrate accessibility. Here, we report the first example of triplet-DNP of nanoporous metal-organic frameworks. Accommodation of a carboxylate-modified pentacene derivative in a partially deuterated ZIF-8 (D-ZIF-8) results in a clear 1H NMR signal enhancement over thermal equilibrium.",

author = "Saiya Fujiwara and Masanori Hosoyamada and Kenichiro Tateishi and Tomohiro Uesaka and Keiko Ideta and Nobuo Kimizuka and Nobuhiro Yanai",

note = "Funding Information: This work was partly supported by JSPS KAKENHI grant numbers JP25220805, JP17H04799, and JP16H06513 and the Tobe Maki Scholarship Foundation. K.T. acknowledges partial support from the RIKEN Pioneering Project Dynamic Structural Biology.",

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AU - Fujiwara, Saiya

AU - Hosoyamada, Masanori

AU - Tateishi, Kenichiro

AU - Uesaka, Tomohiro

AU - Ideta, Keiko

AU - Kimizuka, Nobuo

AU - Yanai, Nobuhiro

N1 - Funding Information: This work was partly supported by JSPS KAKENHI grant numbers JP25220805, JP17H04799, and JP16H06513 and the Tobe Maki Scholarship Foundation. K.T. acknowledges partial support from the RIKEN Pioneering Project Dynamic Structural Biology.

PY - 2018/11/21

Y1 - 2018/11/21

N2 - While dynamic nuclear polarization based on photoexcited triplet electrons (triplet-DNP) has the potential to hyperpolarize nuclear spins of target substrates in the low magnetic field at room temperature, there has been no triplet-DNP system offering structural rigidity and substrate accessibility. Here, we report the first example of triplet-DNP of nanoporous metal-organic frameworks. Accommodation of a carboxylate-modified pentacene derivative in a partially deuterated ZIF-8 (D-ZIF-8) results in a clear 1H NMR signal enhancement over thermal equilibrium.

AB - While dynamic nuclear polarization based on photoexcited triplet electrons (triplet-DNP) has the potential to hyperpolarize nuclear spins of target substrates in the low magnetic field at room temperature, there has been no triplet-DNP system offering structural rigidity and substrate accessibility. Here, we report the first example of triplet-DNP of nanoporous metal-organic frameworks. Accommodation of a carboxylate-modified pentacene derivative in a partially deuterated ZIF-8 (D-ZIF-8) results in a clear 1H NMR signal enhancement over thermal equilibrium.

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Dynamic Nuclear Polarization of Metal-Organic Frameworks Using Photoexcited Triplet Electrons

Abstract

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