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  1. 理学部
  2. 学外刊行物(理学部)
  3. 雑誌

Exploring the ultrafast and isomer-dependent photodissociation of iodothiophenes via site-selective ionization

http://hdl.handle.net/10935/0002006131
http://hdl.handle.net/10935/0002006131
5aacc248-4d8a-4778-a186-b60acfc82c1c
名前 / ファイル ライセンス アクション
/ https://doi.org/10.1039/D3CP06079A
アイテムタイプ default_学術雑誌論文 / Journal Article(1)
タイトル
タイトル Exploring the ultrafast and isomer-dependent photodissociation of iodothiophenes via site-selective ionization
言語 en
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
アクセス権
アクセス権 metadata only access
アクセス権URI http://purl.org/coar/access_right/c_14cb
著者 Razmus Weronika O.

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en Razmus Weronika O.

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Allum Felix

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ハリーズ ジェームズ

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en Harries James

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熊谷 嘉晃

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KAKEN2 1000060842739

en Kumagai Yoshiaki

ja 熊谷 嘉晃

ja-Kana くまがい よしあき

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Nagaya Kiyonobu

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Bhattacharyya Surjendu

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Britton Mathew

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Brouard Mark

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Bucksbaum Philip H.

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Cheung Kieran

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Crane Stuart W.

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伏谷 瑞穂

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en Fushitani Mizuho

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Gabalski Ian

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下條 竜夫

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Ghrist Aaron

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Heathcote David

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彦坂 泰正

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菱川 明栄

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Hockett Paul

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Jones Ellen

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Kukk Edwin

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岩山 洋士

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en Iwayama Hiroshi

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Lam Huynh V. S.

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McManus Joseph W.

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Milesevic Dennis

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Mikosch Jochen

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Minemoto Shinichirou

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Niozu Akinobu

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Orr-Ewing Andrew J.

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Owada Shigeki

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Rolles Daniel

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Rudenko Artem

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Townsend Dave

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Ueda Kiyoshi

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Unwin James

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Vallance Claire

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Venkatachalam Anbu

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和田 真一

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Walmsley Tiffany

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Warne Emily M.

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Woodhouse Joanne L.

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Burt Michael

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Ashfold Michael N. R.

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Minns Russell S.

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Forbes Ruaridh

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抄録
内容記述タイプ Abstract
内容記述 C–I bond extension and fission following ultraviolet (UV, 262 nm) photoexcitation of 2- and 3-iodothiophene is studied using ultrafast time-resolved extreme ultraviolet (XUV) ionization in conjunction with velocity map ion imaging. The photoexcited molecules and eventual I atom products are probed by site-selective ionization at the I 4d edge using intense XUV pulses, which induce multiple charges initially localized to the iodine atom. At C–I separations below the critical distance for charge transfer (CT), charge can redistribute around the molecule leading to Coulomb explosion and charged fragments with high kinetic energy. At greater C–I separations, beyond the critical distance, CT is no longer possible and the measured kinetic energies of the charged iodine atoms report on the neutral dissociation process. The time and momentum resolved measurements allow determination of the timescales and the respective product momentum and kinetic energy distributions for both isomers, which are interpreted in terms of rival ‘direct’ and ‘indirect’ dissociation pathways. The measurements are compared with a classical over the barrier model, which reveals that the onset of the indirect dissociation process is delayed by ∼1 ps relative to the direct process. The kinetics of the two processes show no discernible difference between the two parent isomers, but the branching between the direct and indirect dissociation channels and the respective product momentum distributions show isomer dependencies. The greater relative yield of indirect dissociation products from 262 nm photolysis of 3-iodothiophene (cf. 2-iodothiophene) is attributed to the different partial cross-sections for (ring-centred) π∗ ← π and (C–I bond localized) σ∗ ← (n/π) excitation in the respective parent isomers.
言語 en
書誌情報 en : Physical Chemistry Chemical Physics

巻 26, 号 16, p. 12725-12737, 発行日 2024-04-05
出版者
出版者 Royal Society of Chemistry
言語 en
ISSN
収録物識別子タイプ ISSN
収録物識別子 1463-9076
DOI
識別子タイプ DOI
関連識別子 10.1039/D3CP06079A
権利
権利情報 © the Owner Societies
言語 en
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