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 journalArticle

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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).

Original languageEnglish
Pages (from-to)169-174
Number of pages6
JournalChemical Physics Letters
Volume355
Issue number1-2
DOIs
Publication statusPublished - Mar 25 2002
Externally publishedYes

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metastable state
valence
Electrons
electron transfer
Ground state
ground state

All Science Journal Classification (ASJC) codes

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

Cite this

Sato, O., Hayami, S., Gu, Z. Z., Takahashi, K., Nakajima, R., & Fujishima, A. (2002). Photo-induced reverse valence tautomerism in a metastable Co compound. Chemical Physics Letters, 355(1-2), 169-174. https://doi.org/10.1016/S0009-2614(02)00205-1

Photo-induced reverse valence tautomerism in a metastable Co compound. / Sato, Osamu; Hayami, Shinya; Gu, Zhong Ze; Takahashi, Kazuyuki; Nakajima, Rie; Fujishima, Akira.

In: Chemical Physics Letters, Vol. 355, No. 1-2, 25.03.2002, p. 169-174.

Research output: Contribution to journalArticle

Sato, O, Hayami, S, Gu, ZZ, Takahashi, K, Nakajima, R & Fujishima, A 2002, 'Photo-induced reverse valence tautomerism in a metastable Co compound', Chemical Physics Letters, vol. 355, no. 1-2, pp. 169-174. https://doi.org/10.1016/S0009-2614(02)00205-1
Sato, Osamu ; Hayami, Shinya ; Gu, Zhong Ze ; Takahashi, Kazuyuki ; Nakajima, Rie ; Fujishima, Akira. / Photo-induced reverse valence tautomerism in a metastable Co compound. In: Chemical Physics Letters. 2002 ; Vol. 355, No. 1-2. pp. 169-174.
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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).

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