2002 Fiscal Year Final Research Report Summary
Application of Crowned Spirobenzopyran Derivatives as Colorimetric Reagents
| Project/Area Number |
13650869
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
工業分析化学
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| Research Institution | Wakayama University |
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Principal Investigator |
SAKAMOTO Hidefumi Wakayama University, Faculty of Systems Engineering, Associate Professor, システム工学部, 助教授 (10192593)
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| Co-Investigator(Kenkyū-buntansha) |
木村 恵一 和歌山大学, システム工学部, 教授 (50107140)
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| Project Period (FY) |
2001 – 2002
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| Keywords | Crowned Spirobenzopyran / Photochromism / Alkali Metal Ion / Colorimetry / Photo-control / Liquid - Liquid Extraction / Flow Injection Analysis |
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| Research Abstract |
Spirobenzopyrane derivatives bearing monoazacrown ether or diazacrown ether units were synthesized, and in the liquid - liquid extraction their extraction behavior of alkali metal ions was determined by spectrophotometry under the dark and the photo-irradiation conditions. Under the dark conditions, crowned spirobenzopyran derivatives bearing monoaza -12-crown-4, -15-crown-5, and -18-crown-6 units extracted selectively lithium, lithium, and sodium ions, respectively. The metal ion extraction abilities of the crowned spirobenzopyan derivatives were increased under UV-irradiation conditions compared with those of under the dark conditions, and vice versa under the visible light irradiation conditions. Diaza-12-crown-4 derivative bearing two spirobenzopyran units extracted lithium and calcium ions selectively in the liquid - liquid extraction of alkali and alkaline earth metal ions, respectively. The extraction ability for lithium ion was increased remarkably by UV-irradiation. The extraction colorimetry of lithium ion was studied by the flow injection analysis (FIA) using monoaza-12-crown-4 and diaza-12-crown-4 derivatives bearing spirobenzopyran unit(s) under the dark and UV-irradiation conditions. Diaza-12-crown-4 derivative showed the higher selectivity for lithium ion, and the enhancement of the extraction ability was observed by UV-irradiation.
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Research Products
(4 results)
