Abstract
We fabricated biomolecular light-emitting diodes (BIODE) using hemin, and measured the electroluminescence (EL) spectra, current-voltage and EL intensity-voltage characteristics. The current-voltage and EL intensity-voltage characteristics revealed an irreversible transition of hemin for the applied voltage of V ≈ 4.5 V, above which drastic changes of the EL spectra occur. In order to clarify the origin of this voltage-induced transition, we determined the spin state of several compounds containing heme (hemin, myoglobin, and cytochrome c) using magnetic susceptibility and Raman spectra. We clarified the features of the EL spectra of heme compounds both in the oxidized low-spin state and in the oxidized high-spin state. Based on the spectral features thus obtained, we concluded that the voltage-induced transition in hemin is associated with the change of iron from the oxidized high-spin state (S = 5/2) to the oxidized low-spin state (S = 1/2).
| Original language | English |
|---|---|
| Pages (from-to) | 549-554 |
| Number of pages | 6 |
| Journal | Bulletin of the Chemical Society of Japan |
| Volume | 79 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Nov 9 2006 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
Cite this
A voltage-induced transition of hemin in BIODE (biomolecular light-emitting diode). / Tajima, Hiroyuki; Shimatani, Kazuhiro; Komino, Takeshi; Matsuda, Masaki; Ikeda, Shingo; Ando, Yoriko; Akiyama, Hidefumi.
In: Bulletin of the Chemical Society of Japan, Vol. 79, No. 4, 09.11.2006, p. 549-554.Research output: Contribution to journal › Article
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TY - JOUR
T1 - A voltage-induced transition of hemin in BIODE (biomolecular light-emitting diode)
AU - Tajima, Hiroyuki
AU - Shimatani, Kazuhiro
AU - Komino, Takeshi
AU - Matsuda, Masaki
AU - Ikeda, Shingo
AU - Ando, Yoriko
AU - Akiyama, Hidefumi
PY - 2006/11/9
Y1 - 2006/11/9
N2 - We fabricated biomolecular light-emitting diodes (BIODE) using hemin, and measured the electroluminescence (EL) spectra, current-voltage and EL intensity-voltage characteristics. The current-voltage and EL intensity-voltage characteristics revealed an irreversible transition of hemin for the applied voltage of V ≈ 4.5 V, above which drastic changes of the EL spectra occur. In order to clarify the origin of this voltage-induced transition, we determined the spin state of several compounds containing heme (hemin, myoglobin, and cytochrome c) using magnetic susceptibility and Raman spectra. We clarified the features of the EL spectra of heme compounds both in the oxidized low-spin state and in the oxidized high-spin state. Based on the spectral features thus obtained, we concluded that the voltage-induced transition in hemin is associated with the change of iron from the oxidized high-spin state (S = 5/2) to the oxidized low-spin state (S = 1/2).
AB - We fabricated biomolecular light-emitting diodes (BIODE) using hemin, and measured the electroluminescence (EL) spectra, current-voltage and EL intensity-voltage characteristics. The current-voltage and EL intensity-voltage characteristics revealed an irreversible transition of hemin for the applied voltage of V ≈ 4.5 V, above which drastic changes of the EL spectra occur. In order to clarify the origin of this voltage-induced transition, we determined the spin state of several compounds containing heme (hemin, myoglobin, and cytochrome c) using magnetic susceptibility and Raman spectra. We clarified the features of the EL spectra of heme compounds both in the oxidized low-spin state and in the oxidized high-spin state. Based on the spectral features thus obtained, we concluded that the voltage-induced transition in hemin is associated with the change of iron from the oxidized high-spin state (S = 5/2) to the oxidized low-spin state (S = 1/2).
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U2 - 10.1246/bcsj.79.549
DO - 10.1246/bcsj.79.549
M3 - Article
AN - SCOPUS:33750588938
VL - 79
SP - 549
EP - 554
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 4
ER -