Colorimetric detection of transition metal ions with azopyridine-based probing molecule in aqueous solution and in PMMA film |
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Authors: | Daigeun Kim Ara Jo Bum-Kyoung Seo Kune-Woo Lee Won Ho Park Taek Seung Lee |
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Institution: | 2. Organic and Optoelectronic Materials Laboratory, Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon, 305-764, Korea 1. Decontamination and Decommissioning Research Division, Korea Atomic Energy Research Institute, Daejeon, 305-353, Korea
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Abstract: | We report on an azopyridine derivative for probing transition metal ions and fabrication of its films. The probe, AP, showed a sensitive absorption change toward transition metal ions, especially cobalt ion, even at the concentration of ppm range, accompanied by yellow-to-red color transition with noticeable isosbestic point. In addition, the AP-containing PMMA film with high transparency can be fabricated by spin-casting without any aggregation of AP. The film with PMMA matrix shows good sensitivity toward cobalt ion similar to the case in the solution with a feature of metallochromic transition. |
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