Application of Gold Nanoparticles to Spectrophotometric Sensing of Hydrophilic Anions Based on Molecular Recognition by Urea Derivative
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- KADO Shinpei
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University
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- FURUI Ayumi
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University
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- AKIYAMA Yu
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University
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- NAKAHARA Yoshio
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University
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- KIMURA Keiichi
- Department of Applied Chemistry, Faculty of Systems Engineering, Wakayama University
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説明
We have prepared gold nanoparticles (GNPs) modified with a thiol compound that possesses a phenylurea moiety for the spectrophotometric sensing of hydrophilic anions, such as dihydrogen phosphate, based on changes in the surface plasmon absorption of the GNP. We examined the spectral change of phenylurea-modified GNP in dichloromethane upon the addition of various anions as tetrabutylammonium salts to the solution. The GNP showed increasing plasmon intensity with the concentration of dihydrogen phosphate. For a control experiment with an inactive hexanethiolate-modified GNP, such an ion-selective change in the plasmon band was not observed. Furthermore, in order to realize the spectrophotometric detection of hydrophilic anions in water using GNP with the urea functionality, we attempted to prepare bifunctional GNP modified with both the phenylurea derivative and a water-soluble thiol (e.g., L-cysteine). The resulting bifunctional GNP showed anion-selective changes in the plasmon band accompanied by increasing absorbance at a longer wavelength due to GNPs aggregation.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 25 (2), 261-265, 2009
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679232135936
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- NII論文ID
- 130004441809
- 10025210370
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- NII書誌ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 9789367
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- PubMed
- 19212063
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- 本文言語コード
- en
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