| アイテムタイプ |
学術雑誌論文 / Journal Article.(1) |
| 公開日 |
2022-03-23 |
| 書誌情報 |
en : RSC ADVANCES
巻 11,
号 36,
p. 22381-22389,
発行日 2021
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| タイトル |
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タイトル |
New aspect of photophysics of 7,7,8,8-tetracyanoquinodimethane and its solvated complexes: intra- vs. inter-molecular charge-transfer |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Muramatsu, Satoru
Chaki, Nobumasa
Kinoshita, Shin-nosuke
Inokuchi, Yoshiya
Abe, Manabu
飯森, 俊文
Ebata, Takayuki
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| 室蘭工業大学研究者データベースへのリンク |
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表示名 |
飯森 俊文（IIMORI Toshifumi） |
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URL |
http://rdsoran.muroran-it.ac.jp/html/100000029_ja.html |
| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
We performed laser-induced fluorescence (LIF) spectroscopy of 7,7,8,8-tetracyanoquinodimethane (TCNQ) and its solvated complexes with acetonitrile (ACN) and benzene (Bz), under the jet-cooled gas-phase condition. We also carried out fluorescence and its time profile measurements in TCNQ/Bz/hexane solution to compare with the gas-phase results. The LIF excitation spectrum of the S-1 (pi pi*)-S-0 electronic transition of TCNQ monomer exhibited unusual vibronic structure with the maximum intensity at similar to 3000 cm(-1) above the band origin. In addition, the fluorescence lifetime is more than 100 times longer than that in hexane solution with most of the bands showing double exponential decay. The unusual feature of the vibronic bands is intrinsic and not due to the presence of other species, as confirmed by UV-UV hole-burning (HB) spectroscopy. These unusual features of S-1 are thought to be due to the coupling with the S-2 state, where S-2 was revealed to have intramolecular charge-transfer (ICT) character. The S-1-S-0 transition of the TCNQ-ACN complex exhibited sharp vibronic bands which are red-shifted by 120 cm(-1) from those of the monomer, indicating van der Waals (vdW) interaction between them; however, the fluorescence lifetime was drastically shortened. In contrast, the TCNQ-Bz complex gave a broad electronic spectrum. The study of the fluorescence and its time profile in TCNQ/Bz/hexane solution clearly shows the formation of the CT complex between TCNQ and Bz. Based on the experimental results and density functional theory (DFT) calculations, we propose that in the TCNQ monomer and TCNQ-ACN complex the S-1 (pi pi*) state is coupled to the intramolecular CT state, while the S-1 state of TCNQ in the TCNQ-Bz complex is more strongly coupled to the intermolecular CT state. |
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言語 |
en |
| 出版者 |
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出版者 |
ROYAL SOC CHEMISTRY |
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言語 |
en |
| 出版者版へのリンク |
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表示名 |
10.1039/d1ra01430g |
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URL |
https://doi.org/10.1039/d1ra01430g |
| DOI |
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関連タイプ |
isIdenticalTo |
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識別子タイプ |
DOI |
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関連識別子 |
10.1039/d1ra01430g |
| 日本十進分類法 |
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主題Scheme |
NDC |
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主題 |
430 |
| 権利 |
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権利情報 |
https://creativecommons.org/licenses/by/3.0/ |
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言語 |
en |
| 著者版フラグ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| フォーマット |
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内容記述タイプ |
Other |
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内容記述 |
application/pdf |
RSCAd_11_36_22381 (1.7 MB)
