5-Thiaporphyrinium cation: effect of sulphur incorporation on excited state dynamics

Asahi Takiguchi; Naoto Inai; Seongsoo Kang; Masaya Hagai; Seokwon Lee; Takeshi Yanai; Dongho Kim; Hiroshi Shinokubo

doi:10.1039/d2cc00522k

5-Thiaporphyrinium cation: effect of sulphur incorporation on excited state dynamics

Asahi Takiguchi, Naoto Inai, Seongsoo Kang, Masaya Hagai, Seokwon Lee, Takeshi Yanai, Dongho Kim, Hiroshi Shinokubo

Department of Chemistry

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

Abstract

We synthesised thionium-ion embedded aromatic porphyrinoids: a free-base 5-thiaporphyrinium cation and its zinc complex. The sulphur atom effectively participates in the macrocyclic π-conjugation. Fluorescence quantum yields of thiaporphyrinium cations were lower than 1% unlike oxaporphyrinium cations. Detailed photophysical analysis and DFT calculations clarified the vibrational mode regarding the out-of-plane motion of the sulphur atom induced ultrafast quenching of the excited state in comparison to the corresponding oxaporphyrinium cations.

Original language	English
Journal	Chemical Communications
DOIs	https://doi.org/10.1039/d2cc00522k
Publication status	Accepted/In press - 2022

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© 2022 The Royal Society of Chemistry

All Science Journal Classification (ASJC) codes

Catalysis
Electronic, Optical and Magnetic Materials
Ceramics and Composites
Chemistry(all)
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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title = "5-Thiaporphyrinium cation: effect of sulphur incorporation on excited state dynamics",

abstract = "We synthesised thionium-ion embedded aromatic porphyrinoids: a free-base 5-thiaporphyrinium cation and its zinc complex. The sulphur atom effectively participates in the macrocyclic π-conjugation. Fluorescence quantum yields of thiaporphyrinium cations were lower than 1% unlike oxaporphyrinium cations. Detailed photophysical analysis and DFT calculations clarified the vibrational mode regarding the out-of-plane motion of the sulphur atom induced ultrafast quenching of the excited state in comparison to the corresponding oxaporphyrinium cations.",

author = "Asahi Takiguchi and Naoto Inai and Seongsoo Kang and Masaya Hagai and Seokwon Lee and Takeshi Yanai and Dongho Kim and Hiroshi Shinokubo",

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year = "2022",

doi = "10.1039/d2cc00522k",

language = "English",

journal = "Chemical Communications",

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T1 - 5-Thiaporphyrinium cation

T2 - effect of sulphur incorporation on excited state dynamics

AU - Takiguchi, Asahi

AU - Inai, Naoto

AU - Kang, Seongsoo

AU - Hagai, Masaya

AU - Lee, Seokwon

AU - Yanai, Takeshi

AU - Kim, Dongho

AU - Shinokubo, Hiroshi

PY - 2022

Y1 - 2022

N2 - We synthesised thionium-ion embedded aromatic porphyrinoids: a free-base 5-thiaporphyrinium cation and its zinc complex. The sulphur atom effectively participates in the macrocyclic π-conjugation. Fluorescence quantum yields of thiaporphyrinium cations were lower than 1% unlike oxaporphyrinium cations. Detailed photophysical analysis and DFT calculations clarified the vibrational mode regarding the out-of-plane motion of the sulphur atom induced ultrafast quenching of the excited state in comparison to the corresponding oxaporphyrinium cations.

AB - We synthesised thionium-ion embedded aromatic porphyrinoids: a free-base 5-thiaporphyrinium cation and its zinc complex. The sulphur atom effectively participates in the macrocyclic π-conjugation. Fluorescence quantum yields of thiaporphyrinium cations were lower than 1% unlike oxaporphyrinium cations. Detailed photophysical analysis and DFT calculations clarified the vibrational mode regarding the out-of-plane motion of the sulphur atom induced ultrafast quenching of the excited state in comparison to the corresponding oxaporphyrinium cations.

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U2 - 10.1039/d2cc00522k

DO - 10.1039/d2cc00522k

M3 - Article

C2 - 35438694

AN - SCOPUS:85129653873

SN - 1359-7345

JO - Chemical Communications

JF - Chemical Communications

ER -

5-Thiaporphyrinium cation: effect of sulphur incorporation on excited state dynamics

Abstract

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