Spectroscopic analysis of spatiotemporal evolutions of Liesegang bands by time-resolved X-ray fluorescence imaging
| Project/Area Number |
26410163
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | Japan Women's University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | リーゼガングバンド / プルシアンブルー類似体 / 時間分解・蛍光X線測定 / 位置分解XANES / 位置分解・XANES測定 / 時間分解・蛍光Ｘ線測定 / プルシアン青 / X線吸収分光 / 化学状態分析 / 時間分解蛍光Ｘ線測定 |
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| Outline of Final Research Achievements |
We have developed a laboratory-use X-ray fluorescence (XRF) spectrometer for studying the evolution of Liesegang bands in gels. The developed spectrometer has two types of operation mode: high-resolution mode and high-sensitivity mode. By using this spectrometer, we measured time-dependences of Mn/Fe/Co distributions of several aggregate patterns (including Liesegang bands) formed in water-glass gels, which were generated by reaction-diffusion processes of Mn2+/Fe3+/Co2+ and [Fe(CN)6]3-/[Fe(CN)6]4- ions. The obtained XRF results demonstrated that the turbid zones in gels mainly contained diffusive Prussian blue analogues (PBAs), and indicated that their metal distributions strongly depend on the preparation conditions. Additional XANES measurements of fully developed samples suggests that the combination of time-resolved XRF and position-dependent XANES is a powerful tool for analyzing the aggregate patterns stemming from the formation of PBAs.
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Report
(4 results)
Research Products
(9 results)
