Photo-induced reverse valence tautomerism in a metastable Co compound

Osamu Sato; Shinya Hayami; Zhong Ze Gu; Kazuyuki Takahashi; Rie Nakajima; Akira Fujishima

doi:10.1016/S0009-2614(02)00205-1

Photo-induced reverse valence tautomerism in a metastable Co compound

Osamu Sato, Shinya Hayami, Zhong Ze Gu, Kazuyuki Takahashi, Rie Nakajima, Akira Fujishima

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

62 Citations (Scopus)

Abstract

In our preceding paper, we have reported that a Co complex, [Co^III-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)]· 0.5C₆H₅CH₃, exhibits a photo-induced valence tautomerism. The photo-induced metastable state, [Co^II-HS(tmeda) (3, 5-DBSQ)₂]· 0.5C₆H₅CH₃, has a back electron transfer band from Co^II-HS to 3,5-DBSQ at around 800 nm, indicating that the valence tautomerism should be photo-reversible. In fact, we have found that the metastable state could be photo-pumped back to the original state by exciting the back electron transfer band. The process can be expressed as [Co^II-HS(tmeda)(3, 5-DBSQ)₂] · 0.5C₆H₅CH₃(metastable state) → [Co^III-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)] · 0.5C₆H₅ CH₃ (ground state).

Original language	English
Pages (from-to)	169-174
Number of pages	6
Journal	Chemical Physics Letters
Volume	355
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(02)00205-1
Publication status	Published - Mar 25 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Spectroscopy
Atomic and Molecular Physics, and Optics

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@article{c2a1c372419b4727bdde002696d0c133,

title = "Photo-induced reverse valence tautomerism in a metastable Co compound",

abstract = "In our preceding paper, we have reported that a Co complex, [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)]· 0.5C6H5CH3, exhibits a photo-induced valence tautomerism. The photo-induced metastable state, [CoII-HS(tmeda) (3, 5-DBSQ)2]· 0.5C6H5CH3, has a back electron transfer band from CoII-HS to 3,5-DBSQ at around 800 nm, indicating that the valence tautomerism should be photo-reversible. In fact, we have found that the metastable state could be photo-pumped back to the original state by exciting the back electron transfer band. The process can be expressed as [CoII-HS(tmeda)(3, 5-DBSQ)2] · 0.5C6H5CH3(metastable state) → [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)] · 0.5C6H5 CH3 (ground state).",

author = "Osamu Sato and Shinya Hayami and Gu, {Zhong Ze} and Kazuyuki Takahashi and Rie Nakajima and Akira Fujishima",

year = "2002",

month = mar,

day = "25",

doi = "10.1016/S0009-2614(02)00205-1",

language = "English",

volume = "355",

pages = "169--174",

journal = "Chemical Physics Letters",

issn = "0009-2614",

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T1 - Photo-induced reverse valence tautomerism in a metastable Co compound

AU - Sato, Osamu

AU - Hayami, Shinya

AU - Gu, Zhong Ze

AU - Takahashi, Kazuyuki

AU - Nakajima, Rie

AU - Fujishima, Akira

PY - 2002/3/25

Y1 - 2002/3/25

N2 - In our preceding paper, we have reported that a Co complex, [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)]· 0.5C6H5CH3, exhibits a photo-induced valence tautomerism. The photo-induced metastable state, [CoII-HS(tmeda) (3, 5-DBSQ)2]· 0.5C6H5CH3, has a back electron transfer band from CoII-HS to 3,5-DBSQ at around 800 nm, indicating that the valence tautomerism should be photo-reversible. In fact, we have found that the metastable state could be photo-pumped back to the original state by exciting the back electron transfer band. The process can be expressed as [CoII-HS(tmeda)(3, 5-DBSQ)2] · 0.5C6H5CH3(metastable state) → [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)] · 0.5C6H5 CH3 (ground state).

AB - In our preceding paper, we have reported that a Co complex, [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)]· 0.5C6H5CH3, exhibits a photo-induced valence tautomerism. The photo-induced metastable state, [CoII-HS(tmeda) (3, 5-DBSQ)2]· 0.5C6H5CH3, has a back electron transfer band from CoII-HS to 3,5-DBSQ at around 800 nm, indicating that the valence tautomerism should be photo-reversible. In fact, we have found that the metastable state could be photo-pumped back to the original state by exciting the back electron transfer band. The process can be expressed as [CoII-HS(tmeda)(3, 5-DBSQ)2] · 0.5C6H5CH3(metastable state) → [CoIII-LS(tmeda)(3, 5-DBSQ)(3, 5-DBCat)] · 0.5C6H5 CH3 (ground state).

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