Swift and efficient nuclear spin conversion of molecular hydrogen confined in Prussian blue analogs

Yuta Ohtsubo; Akio Mishima; Akihiro Hori; Ryotaro Matsuda; Ryo Ohtani; Masaaki Ohba

doi:10.1246/cl.190829

Swift and efficient nuclear spin conversion of molecular hydrogen confined in Prussian blue analogs

Yuta Ohtsubo, Akio Mishima, Akihiro Hori, Ryotaro Matsuda, Ryo Ohtani, Masaaki Ohba

無機・分析化学

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

1 被引用数 (Scopus)

抄録

The ortho-isomer of molecular hydrogen (o-H₂) was converted to the para-isomer (p-H₂) within 600 s by using Prussian blue analogs, {M^II ₃[Cr^III(CN)₆]₂} (MCr; M = Mn and Ni), as nuclear-spin conversion catalysts. The swift conversion was confirmed by in-situ Raman micro-spectroscopy under an H₂ gas atmosphere (100 kPa) in a low temperature range (2090 K). The o-p ratio observed in MCr deviated from the theoretical value based on the Boltzmann distribution of H₂ in a free rotational state to the para-rich proportion, which suggested the promotion of the o-p conversion at higher temperature.

本文言語	英語
ページ（範囲）	149-152
ページ数	4
ジャーナル	Chemistry Letters
巻	49
号	2
DOI	https://doi.org/10.1246/cl.190829
出版ステータス	出版済み - 2020

!!!All Science Journal Classification (ASJC) codes

化学 (全般)

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10.1246/cl.190829

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@article{09a71511e24c47fa9e6b6e076ab2f658,

title = "Swift and efficient nuclear spin conversion of molecular hydrogen confined in Prussian blue analogs",

abstract = "The ortho-isomer of molecular hydrogen (o-H2) was converted to the para-isomer (p-H2) within 600 s by using Prussian blue analogs, {MII 3[CrIII(CN)6]2} (MCr; M = Mn and Ni), as nuclear-spin conversion catalysts. The swift conversion was confirmed by in-situ Raman micro-spectroscopy under an H2 gas atmosphere (100 kPa) in a low temperature range (2090 K). The o-p ratio observed in MCr deviated from the theoretical value based on the Boltzmann distribution of H2 in a free rotational state to the para-rich proportion, which suggested the promotion of the o-p conversion at higher temperature.",

author = "Yuta Ohtsubo and Akio Mishima and Akihiro Hori and Ryotaro Matsuda and Ryo Ohtani and Masaaki Ohba",

note = "Funding Information: This work was supported by JSPS KAKENHI Grant Number of 16H06519 (Coordination Asymmetry) and 18H01997, and RIKEN Quantum Ordering project. We would like to thank Editage (www.editage.com) for English language editing.",

year = "2020",

doi = "10.1246/cl.190829",

language = "English",

volume = "49",

pages = "149--152",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "The Chemical Society of Japan",

number = "2",

}

TY - JOUR

T1 - Swift and efficient nuclear spin conversion of molecular hydrogen confined in Prussian blue analogs

AU - Ohtsubo, Yuta

AU - Mishima, Akio

AU - Hori, Akihiro

AU - Matsuda, Ryotaro

AU - Ohtani, Ryo

AU - Ohba, Masaaki

N1 - Funding Information: This work was supported by JSPS KAKENHI Grant Number of 16H06519 (Coordination Asymmetry) and 18H01997, and RIKEN Quantum Ordering project. We would like to thank Editage (www.editage.com) for English language editing.

PY - 2020

Y1 - 2020

N2 - The ortho-isomer of molecular hydrogen (o-H2) was converted to the para-isomer (p-H2) within 600 s by using Prussian blue analogs, {MII 3[CrIII(CN)6]2} (MCr; M = Mn and Ni), as nuclear-spin conversion catalysts. The swift conversion was confirmed by in-situ Raman micro-spectroscopy under an H2 gas atmosphere (100 kPa) in a low temperature range (2090 K). The o-p ratio observed in MCr deviated from the theoretical value based on the Boltzmann distribution of H2 in a free rotational state to the para-rich proportion, which suggested the promotion of the o-p conversion at higher temperature.

AB - The ortho-isomer of molecular hydrogen (o-H2) was converted to the para-isomer (p-H2) within 600 s by using Prussian blue analogs, {MII 3[CrIII(CN)6]2} (MCr; M = Mn and Ni), as nuclear-spin conversion catalysts. The swift conversion was confirmed by in-situ Raman micro-spectroscopy under an H2 gas atmosphere (100 kPa) in a low temperature range (2090 K). The o-p ratio observed in MCr deviated from the theoretical value based on the Boltzmann distribution of H2 in a free rotational state to the para-rich proportion, which suggested the promotion of the o-p conversion at higher temperature.

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DO - 10.1246/cl.190829

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SN - 0366-7022

VL - 49

SP - 149

EP - 152

JO - Chemistry Letters

JF - Chemistry Letters

IS - 2

ER -

Swift and efficient nuclear spin conversion of molecular hydrogen confined in Prussian blue analogs

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!!!All Science Journal Classification (ASJC) codes

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