Fluorescence chemical sensor based on water‐soluble poly(p‐phenylene ethynylene)–graphene oxide composite for Cu2+ |
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| Authors: | Naoya Adachi Mai Nakajima Mari Okada Masafumi Sugeno Takayuki Norioka |
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| Affiliation: | Division of Science, School of Science and Engineering, Tokyo Denki University, Hatoyama, Hiki‐gun, Saitama, Japan |
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| Abstract: | A chemical sensor for metal ions was fabricated based on a water‐soluble conjugated polymer–graphene oxide (GO) composite. Water‐soluble poly(p‐phenylene ethynylene) (PPE) with sulfonic acid side chain groups was used to prepare a very stable water‐soluble PPE–GO composite with strong π–π interactions in water. The relationship between the optical properties and metal ion sensing capability of the PPE–GO composite in aqueous solution was investigated. Addition of metal ions enhanced the fluorescence intensity of the composite, and, in particular, the composite enabled the fluorescence detection of Cu2+ in aqueous solutions with high selectivity and sensitivity. Therefore, this conjugated polymer–GO composite sensor system was found to be an effective turn‐on type chemical sensor for metal ions. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | water‐soluble conjugated polymer graphene oxide chemical sensor metal ion sensing fluorescence change |
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