Abstract
2,3-Dichloro-1,4-naphtoquinone (NQ) was anchored to a gold electrode surface through the self-assembled monolayers of aminoalkanethiols (AAT, HS(CH2)nNH2: n=2, 5, and 8). The effect of the alkyl chain length of the AAT monolayer, which also acts as the spacer between the NQ molecule and the gold electrode surface, on the redox behavior of the immobilized NQ has been studied by using a voltammetric technique. The surface coverage of the anchored NQ was estimated to be 3.8×10-10 mol cm-2 in the case that 2-aminoethanethiol (HS(CH2)2NH2) was used as the monolayer constituent. The electron-transfer rate constant, kat, associated with the redox process of anchored NQ decreased from 9.7 s-1 at n=2 to 0.78 s-1 at n=8, with increasing the chain length of the AAT monolayer, though the redox potential of NQ was scarcely affected by the chain length. The tunneling barrier coefficient, β, of the electron transfer was estimated to be 0.36 Å-1 from the observed linear relationship between the ket value and the monolayer chain length.
| Original language | English |
|---|---|
| Pages (from-to) | 2461-2464 |
| Number of pages | 4 |
| Journal | Bulletin of the Chemical Society of Japan |
| Volume | 69 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Jan 1 1996 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
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Electrochemical behavior of the naphtoquinone anchored onto a gold electrode through the self-assembled monolayers of aminoalkanethiol. / Mukae, Fumihiko; Takemura, Hiroyuki; Takehara, Ko.
In: Bulletin of the Chemical Society of Japan, Vol. 69, No. 9, 01.01.1996, p. 2461-2464.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Electrochemical behavior of the naphtoquinone anchored onto a gold electrode through the self-assembled monolayers of aminoalkanethiol
AU - Mukae, Fumihiko
AU - Takemura, Hiroyuki
AU - Takehara, Ko
PY - 1996/1/1
Y1 - 1996/1/1
N2 - 2,3-Dichloro-1,4-naphtoquinone (NQ) was anchored to a gold electrode surface through the self-assembled monolayers of aminoalkanethiols (AAT, HS(CH2)nNH2: n=2, 5, and 8). The effect of the alkyl chain length of the AAT monolayer, which also acts as the spacer between the NQ molecule and the gold electrode surface, on the redox behavior of the immobilized NQ has been studied by using a voltammetric technique. The surface coverage of the anchored NQ was estimated to be 3.8×10-10 mol cm-2 in the case that 2-aminoethanethiol (HS(CH2)2NH2) was used as the monolayer constituent. The electron-transfer rate constant, kat, associated with the redox process of anchored NQ decreased from 9.7 s-1 at n=2 to 0.78 s-1 at n=8, with increasing the chain length of the AAT monolayer, though the redox potential of NQ was scarcely affected by the chain length. The tunneling barrier coefficient, β, of the electron transfer was estimated to be 0.36 Å-1 from the observed linear relationship between the ket value and the monolayer chain length.
AB - 2,3-Dichloro-1,4-naphtoquinone (NQ) was anchored to a gold electrode surface through the self-assembled monolayers of aminoalkanethiols (AAT, HS(CH2)nNH2: n=2, 5, and 8). The effect of the alkyl chain length of the AAT monolayer, which also acts as the spacer between the NQ molecule and the gold electrode surface, on the redox behavior of the immobilized NQ has been studied by using a voltammetric technique. The surface coverage of the anchored NQ was estimated to be 3.8×10-10 mol cm-2 in the case that 2-aminoethanethiol (HS(CH2)2NH2) was used as the monolayer constituent. The electron-transfer rate constant, kat, associated with the redox process of anchored NQ decreased from 9.7 s-1 at n=2 to 0.78 s-1 at n=8, with increasing the chain length of the AAT monolayer, though the redox potential of NQ was scarcely affected by the chain length. The tunneling barrier coefficient, β, of the electron transfer was estimated to be 0.36 Å-1 from the observed linear relationship between the ket value and the monolayer chain length.
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UR - http://www.scopus.com/inward/citedby.url?scp=0000146104&partnerID=8YFLogxK
U2 - 10.1246/bcsj.69.2461
DO - 10.1246/bcsj.69.2461
M3 - Article
AN - SCOPUS:0000146104
VL - 69
SP - 2461
EP - 2464
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 9
ER -