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Synthesis, characterisation and luminescent properties of lanthanide-organic po...
Girginova, Penka I.; Paz, Filipe A. Almeida; Soares-Santos, Paula C. R.; Ferreira, R. A. Sá; Carlos, Luís D.; Amaral, Vítor S.; Klinowski, JacekThree new lanthanide(III) complexes (Ln = Sm, Tb and Eu) of picolinic and glutaric acid were prepared and characterised. The crystal structure of the complex [Sm(glu)(pic)- (H2O)2] (where Hpic and H2glu stand for picolinic and glutaric acid, respectively) was determined by single-crystal Xray diffraction. All the Ln complexes were characterised by elemental analysis, infrared spectroscopy, X-ray powder diffract...
Synthesis, structure and magnetic behaviour of mixed metal leucophosphite
Shi, Fa-Nian; Santos, António Moreira dos; Cunha-Silva, Luís; Costa, Benilde F.O.; Klinowski, Jacek; Paz, Filipe A. Almeida; Amaral, Vítor S.A synthetic analogue of leucophosphite, an iron phosphate, was synthesized hydrothermally at 180 °C and its chemical composition determined to be K[(FeV)(PO4)2(OH)(H2O)]·H2O. The compound crystallizes in the monoclinic P21/c space group, with a=9.7210(19) Å, b=9.6500(19) Å, c=12.198(4) Å and [beta]=128.569(18)°. While the original all-iron compound is reported to be antiferromagnetic, the inclusion of substitut...
catena-[1,3-diammoniopropane di-mu2-hydroxodi-mu4-phosphato-trioxotrivanadium d...
Paz, Filipe A. Almeida; Shi, Fa-Nian; Trindade, Tito; Rocha, João; Klinowski, JacekThe crystal structure of the title compound, (C3H12N2)- [V3O3(OH)2(PO4)2] 2H2O, has been reported by Soghomonian et al. [Chem. Mater. (1993), 5, 1690±1691]. We present here a redetermination of greatly improved precision and at a low temperature of 180 (2) K. The H atoms connected to oxygen have been successfully located and the coordination environments of the two crystallographically independent vanadium cent...
Tetrabutylammonium 2,6-dihydroxybenzoate 2,6-dihydroxybenzoic acid solvate
Paz, Filipe A. Almeida; Soares-Santos, Paula C. R.; Nogueira, Helena I. S.; Trindade, Tito; Klinowski, JacekThe title compound, C16H36N+ C7H5O4 ÿ C7H6O4 or (nBu4N)+ (2,6-dhb) ÿ (2,6±Hdhb) [where (nBu4N) is tetrabutylammonium, (2,6-dhb) ÿ is 2,6-dihydroxybenzoate and (2,6-Hdhb) is 2,6-dihydroxybenzoic acid], crystallizes in the space group P1. The crystal structure involves alternate layers, in the c direction, of cationic [nBu4N]n n+ and anionic [(2,6- dhb)(2,6-Hdhb)]n nÿ . Hydrogen bonds within the anionic layers fo...
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