TY - JOUR
T1 - Syntheses, structures, and spectroscopy of mono- and polynuclear lanthanide complexes containing 4-acyl-pyrazolones and diphosphineoxide
AU - Marchetti, Fabio
AU - Pettinari, Claudio
AU - Pizzabiocca, Adriano
AU - Drozdov, Andrei A.
AU - Troyanov, Sergei I.
AU - Zhuravlev, Constantine O.
AU - Semenov, Sergey N.
AU - Belousov, Yuriy A.
AU - Timokhin, Ivan G.
PY - 2010/11/25
Y1 - 2010/11/25
N2 - Lanthanide coordination compounds are important due to their unique luminescence and magnetic properties. Direct synthesis of oligo- and polymeric Ln complexes with a predicted structure is hampered due to high coordination numbers and unstable coordination polyhedra. A "building blocks" strategy for the synthesis of Ln(Q)(3)L polymers (Ln = Eu, Tb or Gd; HQ = 1-phenyl-3-methyl-4-RC(=O)pyrazol-5-one in general, in detail HQ(S), R = thienyl; HQ(CP): R = cyclopentyl; L = bis(diphenylphosphine) methane dioxide dppMO(2), bis(diphenylphosphine) ethane dioxide dppEO(2), and bis(diphenylphosphine) butane dioxide dppBO(2)) has been used: {Ln(Q)(3)} mononuclear fragments have been linked by dppXO(2) bridges when X = E or B, while monomeric molecular derivatives have been isolated with dppMO(2). Eighteen new complexes were prepared, 12 of them showing a polymeric nature and 6 being monomers. Three compounds have been structurally characterized, further confirming the hypothesized connectivity where metal centers have been found to exist in LnO(8) square antiprismatic environments. Luminescence properties have been also investigated. (C) 2010 Elsevier B.V. All rights reserved.
AB - Lanthanide coordination compounds are important due to their unique luminescence and magnetic properties. Direct synthesis of oligo- and polymeric Ln complexes with a predicted structure is hampered due to high coordination numbers and unstable coordination polyhedra. A "building blocks" strategy for the synthesis of Ln(Q)(3)L polymers (Ln = Eu, Tb or Gd; HQ = 1-phenyl-3-methyl-4-RC(=O)pyrazol-5-one in general, in detail HQ(S), R = thienyl; HQ(CP): R = cyclopentyl; L = bis(diphenylphosphine) methane dioxide dppMO(2), bis(diphenylphosphine) ethane dioxide dppEO(2), and bis(diphenylphosphine) butane dioxide dppBO(2)) has been used: {Ln(Q)(3)} mononuclear fragments have been linked by dppXO(2) bridges when X = E or B, while monomeric molecular derivatives have been isolated with dppMO(2). Eighteen new complexes were prepared, 12 of them showing a polymeric nature and 6 being monomers. Three compounds have been structurally characterized, further confirming the hypothesized connectivity where metal centers have been found to exist in LnO(8) square antiprismatic environments. Luminescence properties have been also investigated. (C) 2010 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.ica.2010.08.006
DO - 10.1016/j.ica.2010.08.006
M3 - Article
SN - 0020-1693
VL - 363
SP - 4038
EP - 4047
JO - Inorganica Chimica Acta-Articles
JF - Inorganica Chimica Acta-Articles
IS - 14
ER -