Coordination chemistry of lanthanides with cryptands. An X-ray and spectroscopic study of the complex Nd2(NO3)6 [C18H36O6N2]·H2O |
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| Authors: | F Benetollo G Bombieri A Cassol G De Paoli J Legendziewicz |
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| Institution: | Istituto di Chimica e Tecnologia dei Radioelementi del C.N.R., Corso Stati Uniti, 35141 Padua, Italy;Istituto di Chimica Farmaceutica e Tossicologica, Università di Milano, Viale Abruzzi 42, 20131 Milan, Italy;Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Università di Padova, Via Marzolo 1, 35131 Padua, Italy;Institute of Chemistry, University of Wroc?aw, 50383 Wroc?aw, Poland |
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| Abstract: | By reacting neodymium nitrate hexahydrate with the cryptand 〈222〉 in methanol, the complex Nd2-(NO3)6C18H36O6N2]·H2O was obtained and analyzed by single-crystal X-ray diffraction. The cell is triclinic P with a = 14.870(2) Å, b = 13.261(2) Å, c = 8.832(1) Å, α = 91.2(1)°, β = 93.4(1)°, γ = 87.6(1)°, Z = 2 and U = 1736.6 Å3. The structure was refined by least-squares methods to the conventional R = 0.039 for 6177 observed reflections. The compound contains the cations Nd〈222〉(NO3)]2+ and the anions Nd(NO3)5·H2O]2?, and is isostructural with the samarium analogue. Solid state fluorescence spectra of the title complex were measured at room and liquid nitrogen temperature, and the transitions 4F3/2 → 4I9/2 and 4F3/2 → 4I11/2 analyzed. |
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| Keywords: | Author to whom correspondence should be addressed |
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