A fresh look at the structural diversity of dibenzoylmethanide complexes of lanthanides

An analysis of known synthetic methods for dibenzoylmethanide (dbm − ) complexes of lanthanides of different nuclearity, viz. [Ln(dbm) 3 (H 2 O)], [Ln 4 (dbm) 10 (OH) 2 ], [Ln 5 (dbm) 10 (OH) 5 ] and [KLn(dbm) 4 ] n (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) has been carried out. These methods ha...

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Bibliographic Details
Published in:New journal of chemistry 2019-06, Vol.43 (25), p.9934-9942
Main Authors: Sukhikh, Taisiya S, Kolybalov, Dmitry S, Pylova, Ekaterina K, Bashirov, Denis A, Komarov, Vladislav Y, Kuratieva, Natalia V, Smolentsev, Anton I, Fitch, Andrew N, Konchenko, Sergey N
Format: Article
Language:English
Subjects:
Benzoates
Composition
Crystal structure
Crystallography
Dysprosium
Emission analysis
Erbium
Europium
Gadolinium
Infrared spectroscopy
Lanthanides
Photoluminescence
Solid solutions
X-ray diffraction
Ytterbium
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Summary:An analysis of known synthetic methods for dibenzoylmethanide (dbm − ) complexes of lanthanides of different nuclearity, viz. [Ln(dbm) 3 (H 2 O)], [Ln 4 (dbm) 10 (OH) 2 ], [Ln 5 (dbm) 10 (OH) 5 ] and [KLn(dbm) 4 ] n (Ln = Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) has been carried out. These methods have been optimized, the range of lanthanides for the compounds extended, and novel complex species, viz. [KLn(Me 2 CO)(dbm) 4 ] 2 (Ln = Eu, Dy, Yb) and [Nd 3 (dbm) 8 (OH)(H 2 O)], have been produced. The nature of the lanthanides in some cases affects the composition of the products formed. The compound [KEu(Me 2 CO)(dbm) 4 ] 2 in solution can transform to [KEu(dbm) 3 (OBz)] n , containing benzoate (OBz − ). For the seven new complexes, the crystal structures have been determined by X-ray diffraction. Photoluminescent properties of the europium complexes have been studied. Their composition and structure influence the emission band shape and quantum yields. Two solid solutions of heterolanthanide complexes [Er x Yb 5- x (dbm) 10 (OH) 5 ] ( x = 1.2, 2.0) have been prepared, as shown by high-resolution powder XRD analysis. Synthetic methods for dibenzoylmethanide lanthanide complexes as well as heterolanthanide ones were systematized revealing several species.
ISSN:1144-0546
1369-9261
DOI:10.1039/c9nj02059d