Intercalation of stable organic radicals into layered copper hydroxides |
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| Affiliation: | 1. Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, Komaba, Meguro, Tokyo 153-8902, Japan;2. Structure and Transformation, PRESTO, Japan Science and Technology Corporation (JST), Kudan-Minami, Tokyo 102-0074, Japan;1. LAFMACEL-INTECIN, Facultad de Ingeniería, UBA. Av. Paseo Colón 850, C1063EHA Buenos Aires, Argentina;2. Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba. IFEG, CONICET. Ciudad Universitaria, Córdoba, Argentina;1. Institut des Sciences Chimiques de Rennes, ISCR-UMR CNRS 6226, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France;2. INSA-ISCR-UMR 6226, Université Européenne de Bretagne, INSA de Rennes, 35043 Rennes Cedex, France;3. Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia;1. Department of Ceramic, Materials and Energy Research Center, P.O. Box 14155-4777, Karaj, Iran;2. Department of Semiconductors, Materials and Energy Research Center, P.O. Box 31787-316, Karaj, Iran;3. Department of Advanced Materials & Renewable Energy, Iranian Research Organization for Science & Technology, Tehran, Iran |
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| Abstract: | We report the intercalation of a stable organic radical, 3-carboxy-2,2,5,5-tetramethyl-1-pyrrolidine-1-oxyl anion (PROXYL−) into the layered copper hydroxides, Cu2(OH)3(CH3CO2)·H2O, by means of the anion exchange. The powder X-ray diffractions reveal the anion exchange, showing an increase in the interlayer distance. However, the elemental analyses indicate that the obtained material is Cu2(OH)3.5(PROXYL)0.5·H2O. The temperature dependence of the magnetic susceptibilities for the intercalation compound indicates a dominant antiferromagnetic interaction in contrast to the intralayer ferromagnetic interaction in the parent compound. The EPR spectra of the intercalation compound consist of the absorption of the organic radical, whose temperature-variable follows the Curie law. The observed antiferromagnetic properties can be ascribed to a transition in the magnetic properties of the Cu2(OH)3]+ layer from ferromagnetic to antiferromagnetic upon intercalation. |
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