Hexakis(2,3,6-tri-

O -methyl)-α-cyclodextrin-I 5 - complex in aqueous I - /I 3 - thermocells and enhancement in the Seebeck coefficient

Yimin Liang, Teppei Yamada, Hongyao Zhou, Nobuo Kimizuka

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)

抄録

A large Seebeck coefficient (S e ) of 1.9 mV K -1 was recorded for the I - /I 3 - thermocell by utilizing the host-guest complexation of hexakis(2,3,6-tri-O-methyl)-α-cyclodextrin (Me 18 -α-CD) with the oxidized iodide species. The thermocell measurement and UV-vis spectroscopy unveiled the formation of an Me 18 -α-CD-pentaiodide (I 5 - ) complex, which is in remarkable contrast to the triiodide complex α-CD-I 3 - previously reported. Although the precipitation of the α-CD-I 3 - complex in the presence of an electrolyte such as potassium chloride is a problem in thermocells, this issue was solved by using Me 18 -α-CD as a host compound. The absence of precipitation in the Me 18 -α-CD and I - /I 3 - system containing potassium chloride not only improved the S e of the I - /I 3 - thermocell, but also significantly enhanced the temporal stability of its power output. This is the first observation that I 5 - species is formed in aqueous solution in a thermocell. Furthermore, the solution equilibrium of the redox couples was controlled by tuning the chemical structure of the host compounds. Thus, the integration of host-guest chemistry with redox couples extends the application of thermocells.

元の言語英語
ページ(範囲)773-780
ページ数8
ジャーナルChemical Science
10
発行部数3
DOI
出版物ステータス出版済み - 1 1 2019

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Potassium Chloride
Seebeck coefficient
Cyclodextrins
Iodides
Ultraviolet spectroscopy
Complexation
Electrolytes
Tuning
Oxidation-Reduction
pentaiodide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

これを引用

Hexakis(2,3,6-tri- : O -methyl)-α-cyclodextrin-I 5 - complex in aqueous I - /I 3 - thermocells and enhancement in the Seebeck coefficient. / Liang, Yimin; Yamada, Teppei; Zhou, Hongyao; Kimizuka, Nobuo.

:: Chemical Science, 巻 10, 番号 3, 01.01.2019, p. 773-780.

研究成果: ジャーナルへの寄稿記事

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abstract = "A large Seebeck coefficient (S e ) of 1.9 mV K -1 was recorded for the I - /I 3 - thermocell by utilizing the host-guest complexation of hexakis(2,3,6-tri-O-methyl)-α-cyclodextrin (Me 18 -α-CD) with the oxidized iodide species. The thermocell measurement and UV-vis spectroscopy unveiled the formation of an Me 18 -α-CD-pentaiodide (I 5 - ) complex, which is in remarkable contrast to the triiodide complex α-CD-I 3 - previously reported. Although the precipitation of the α-CD-I 3 - complex in the presence of an electrolyte such as potassium chloride is a problem in thermocells, this issue was solved by using Me 18 -α-CD as a host compound. The absence of precipitation in the Me 18 -α-CD and I - /I 3 - system containing potassium chloride not only improved the S e of the I - /I 3 - thermocell, but also significantly enhanced the temporal stability of its power output. This is the first observation that I 5 - species is formed in aqueous solution in a thermocell. Furthermore, the solution equilibrium of the redox couples was controlled by tuning the chemical structure of the host compounds. Thus, the integration of host-guest chemistry with redox couples extends the application of thermocells.",
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T2 - O -methyl)-α-cyclodextrin-I 5 - complex in aqueous I - /I 3 - thermocells and enhancement in the Seebeck coefficient

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