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The coordination polymers [ Ln ( β - dik ) 3 bpy ] ∞ 1 ·C 7 H 8 (Ln = Eu, β-dik = dbm, tta, hfac; Ln = Tb; β-dik = dbm; Hdbm = dibenzoylmethane, Htta = thenoyltrifluoroacetone, Hhfac: hexafluoroacetylacetone) were easily assembled in mild conditions and high yields starting from the anhydrous lanthanide β-diketonates as nodes and 4,4′-bipyridine (bpy) as connector. X-ray single crystal studies have shown zigzag extended chains where lanthanide centres are 8-coordinated in a distorted square-antiprismatic geometry. Photoluminescence studies show bright red europium emission and spectral features dependent on the topology of the polymeric chains. [ABSTRACT FROM AUTHOR]

Partial hydrolysis (H 2 O/Ln molar ratio = ¼) of lanthanum di- iso -propylcarbamato complex, [La(O 2 CN i Pr 2 ) 3 ], 1 , afforded the tetranuclear μ-oxo derivative [La 4 O(O 2 CN i Pr 2 ) 10 ], 2 , which was structurally characterized by single crystal X-ray diffraction studies. The carbonato–carbamato derivative of lanthanum, [La 4 (CO 3 )(O 2 CNBu 2 ) 10 ], 3 , was prepared by extraction of lanthanum ions from aqueous solution into heptane by the NHBu 2 /CO 2 system. Partial hydrolysis (H 2 O/Ln molar ratio = ½) of N , N -di-iso-propylcarbamato complexes of neodymium, europium, gadolinium and terbium, [Ln(O 2 CN i Pr 2 ) 3 ], yielded the derivatives [Ln 2 (CO 3 )(O 2 CN i Pr 2 ) 4 ] (Ln = Nd, 4 , Eu, 5 , Gd, 6 ). Exhaustive hydrolysis of [Ln(O 2 CNR 2 ) 3 ] (Ln = Nd, Tb, R = Bu; Ln = Eu, Gd, R = i Pr, Bu) produced hydrated lanthanide carbonates, Ln 2 (CO 3 ) 3 · n H 2 O. For sake of comparison with a block d metal, the exhaustive hydrolysis of two copper(II) carbamato complexes, [Cu(O 2 CNEt 2 ) 2 (NHEt 2 )] 2 and [Cu(O 2 CN i Pr 2 ) 2 ], was carried out with formation in both cases of the hydrated basic carbonate Cu 2 (OH) 2 (CO 3 )· n H 2 O. The exhaustive hydrolysis of mixtures of cerium and lanthanum or cerium and terbium N , N -dibutylcarbamato complexes allowed the preparation of mixed oxides containing the two metals in the desired molar ratio, via the intermediate formation of the corresponding mixed carbonates. [ABSTRACT FROM AUTHOR]

Neodymium and terbium pentafluorophenolates, containing 1,10-phenanthroline as ancillary ligand, [Ln(OC 6 F 5 ) 3 (phen) 3 ], ( 1 Ln = Nd, 2 Ln = Tb) have been synthesized by reacting the N , N -dibutylcarbamato complexes, [Ln(O 2 CNBu 2 ) 3 ], easily obtained from aqueous solutions of lanthanide salts, with C 6 F 5 OH in the presence of 1,10-phenanthroline. The formation of the sparingly soluble hydrated compound [Tb(OC 6 F 5 ) 3 (phen) 2 (H 2 O)·phen], 3 , was observed, due to fortuitous presence of water. Single crystal X-ray diffraction studies on compounds 1 , 3 and 3 ·DME (DME = dimethoxyethane) showed coordination numbers (CN) 9 for neodymium in 1 and 8 for terbium in 3 and 3 ·DME, where only two 1,10-phenanthroline ligands are coordinated to terbium, the third forming two hydrogen bonds with the coordinated water. The structural characterisation of [NH 2 Bu 2 ][C 6 F 5 O], 4 , showed the organisation of the product in ionic quartets. The photoluminescence spectra of 1 and 2 displayed the typical emissions related to the lanthanide centre in the NIR and visible region, respectively. [ABSTRACT FROM AUTHOR]