Tetranuclear Eu(III)-Co(II) complex of an N4O4 macrocycle |
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| Affiliation: | 1. Fachbereich Chemie, Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Straße, D-35043 Marburg, Germany;2. Department of Chemistry, University of Wroc?aw, 14 F. Joliot-Curie, 50-383 Wroc?aw, Poland;1. School of Chemical Engineering, Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi''an 710069, Shaanxi, China;2. Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China;3. Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712-0165, United States;1. School of Chemical Engineering, Shaanxi Key Laboratory of Degradable Medical Material, Northwest University, Xi''an 710069, Shaanxi, China;2. Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China;3. Department of Chemistry and Biochemistry, The University of Texas at Austin, 1 University Station A5300, Austin, TX 78712-0165, United States;1. G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Nizhny Novgorod 603950, Russia;2. Lobachevsky State University, Nizhny Novgorod 603950, Russia;1. Key Laboratory of Polyoxometalate Science, Department of Chemistry, Northeast Normal University, Changchun 130024, China;2. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;3. College of Science, Nanjing Agricultural University, Nanjing 210095, China |
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| Abstract: | The reaction of an Eu(III) complex of the protonated form of the macrocyclic Schiff base derived from 1,3-diamino-2-hydroxypropane and 2,6-diformylphenol, Eu(H4L)Cl3], with three equivalents of base results in a mononuclear complex of the triply deprotonated form of the ligand, Eu(HL)]. The photophysical properties of the Eu(HL)] complex are discussed on the basis of emission and excitation spectra, as well as of the emission decay times. The Eu(HL)] complex in a reaction with cobalt(II) chloride gives a heterometallic Eu(III)-Co(II) macrocyclic complex, EuCo(HL)(CH3OH)2Cl]2Cl2·4CH3OH. In the presence of base and an excess of cobalt(II) chloride the starting Eu(H4L)Cl3] complex is converted to a dinuclear Co(II) complex, Co2(H2L)Cl2(CH3OH)2]·1.5CH3OH. |
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