| Project/Area Number |
24655115
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Functional materials chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
OKAZAWA Atsushi 東京大学, 大学院総合文化研究科, 助教 (30568275)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | スピンクロスオーバー錯体膜 / pH応答性 / イオン交換膜 / ハロクロミズム / EXAFS / XANES / プロトン流の可視化 / スピンクロスオーバー / プロトン流 / 時空間制御 |
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| Research Abstract |
The spin state of a pH-sensitive spin-crossover iron(II) complex in highly proton-conductive Nafion membrane, [FeII(diAMsar)]@Nafion (diAMsar = 1,8-diaminosarcophagine), was spatiotemporally manipulated by electric field-induced proton concentration gradient derived from applied voltage. [Fe(II)(diAMsar)] has the high-spin (HS) state of Fe(II) in acidic condition, whereas it has the low-spin (LS) state in basic condition due to the protonation/deprotonation of the terminal amino groups of diAMsar being associated with color change. Applied voltage reversibly induced the time-variable color change of [Fe(II)(diAMsar)]@Nafion, corresponding to the dynamical spin-crossover behavior of [Fe(II)(diAMsar)]. In this way, we visualized the proton flow in Nafion membrane by using the pH-sensitive spin-crossover complex as a color indicator for the first time.
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