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Development of 1,2- and 1,3-Ketohydrazones Derived Rhodamine Chromophores Sensitive to Metal Ions and pH

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New Rhodamine derivatives were developed from ketohydrazones. 2,4-Pentanedione and 1,3-cyclohexanedione condensation of rhodamine-hydrazine afforded a stable enol hydrazone and enamine rhodamines via equilibrium shifts. Enamine rhodamine exhibited strong pH sensitivity. 2-Cyclohexanedione rhodamine emitted a strong fluorescence as a selective Al3+ sensing probe. The binding constants of the enol hydrazone rhodamine were 2.0 × 104 M-1 (Al3+) and 5.4 × 104 (Cu2+).
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Keywords: Al3+ Detection; Fluorescence; Ketohydrazone; Rhodamine Chemosensor

Document Type: Research Article

Affiliations: 1: Department of Chemical Materials, Pusan National University, Busan 46241, Korea 2: Department of Chemistry Education, Pusan National University, Busan 46241, Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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