10025-90-8Relevant articles and documents
Synthesis, crystal structures and properties of a series of three-dimensional lanthanide coordination polymers with the rigid and flexible mixed dicarboxylate ligands of 1,4-benzene dicarboxylic acid and succinic acid
Wang, Chun-Guang,Xing, Yong-Heng,Li, Zhang-Peng,Li, Jing,Zeng, Xiao-Qing,Ge, Mao-Fa,Niu, Shu-Yun
, p. 126 - 131 (2009)
A series of new lanthanide coordination polymers, with the formula [Ln(Suc)0.5(p-BDC)] (Ln = Eu (1), Sm (2), Tb (3), Pr (4), Ho (5); H2Suc = succinic acid; p-H2BDC = 1,4-benzene dicarboxylic acid), have been synthesized un
Preparation, crystal structure, and magnetism of [(CH3)2NH2][PrCl4(H 2O)2]
Becker, Annette,Urland, Werner
, p. 1033 - 1036 (1999)
The complex water containing chloride [(CH3)2NH2][PrCl4(H 2O)2] has been prepared for the first time and the crystal structure has been determined from single crystal X-ray diffraction data. The compound crystallizes orthorhombically in the space group Cmca (Z = 8) with a = 1796.6(2) pm, b = 940.7(1) pm, and c = 1238.4(2) pm. The anionic part of the structure is built up by chains of edge-connected trigondodecahedra [PrCl6(H2O)2]3- according to [PrCl4/2Cl2(H2O)2]-, which are held together by dimethylammonium cations ([(CH3)2NH2]+). In order to study the interactions between the praseodymium cation (Pr3+) and the ligands magnetic measurements were carried out. The magnetic data were interpreted by ligand field calculations applying the angular overlap model.
Reassignment of the crystal space group of crystalline Pr[M(CN)6] · 5H2O (M = Cr, Fe, Co)
Zhang, Lin-Ping,Zhou, Xian-ju,Mak, Thomas C.W.,Tanner, Peter A.
, p. 4019 - 4023 (2007)
Refinement of the X-ray crystal structures of Pr[M(CN)6] · 5H2O (M = Cr, Fe, Co) enables their space group to be reassigned to P63/mmc. Spectral characteristics are reported for M = Cr and the distinction between the penta
Phase equilibrium system of RbCl-PrCl3-HCl(12.86 mass %)-H 2O at 298.15 K and standard molar enthalpy of formation of new solid-phase compound
Qiao, Zhanping,Gao, Junlin,Zhuo, Lihong,Zhang, Meili,Zhang, Shuai
, p. 1474 - 1478 (2009)
The equilibrium solubility of the quaternary system RbCl-PrCl 3-HCl-H2O was determined at 298.15 K and the corresponding equilibrium diagram was constructed in this paper. The quaternary system is complicated with three equilibrium s
Solvothermal synthesis and structures of lanthanide-organic sandwich coordination polymers with 4,4′-biphenyldicarboxylic acid
Wang, Yi-Bo,Zhuang, Wen-Juan,Jin, Lin-Pei,Lu, Shao-Zhe
, p. 21 - 27 (2004)
First examples of lanthanide coordination polymers with 4,4′-biphenyldicarboxylic acid (4,4′-H2bpdc), Ln(4,4′-Hbpdc)(4,4′-bpdc)(H2O)2 (Ln=Pr(1), Eu(2), Gd(3)) and Er(4,4′-bpdc)1.5(H2O)2 (4)
Syntheses and characterization of novel lanthanide adamantine-dicarboxylate coordination complexes
Li, Xing,Wei, Dan-Yi,Huang, Shi-Jie,Zheng, Yue-Qing
, p. 95 - 101 (2009)
Hydrothermal reactions of 1,10-phenanthroline (phen), 1,3-adamantanedicarboxylic acid (H2L) and lanthanide chlorides yielded six compounds: [Ln(L)(HL)(phen)] (Ln=Pr, 1; Nd, 2), [Ln(L)(HL)(phen)(H2O)] (Sm, 3; Eu, 4), [Tb(L)(HL)(phen)(
Comparison of the spectroscopic behaviour of single crystals of lanthanide halides (X = Cl, Br)
Oczko, Grazyna,Macalik, Lucyna,Legendziewicz, Janina,Hanuza, Jerzy
, p. 327 - 336 (2004)
Halides belong to large band gap matrices that have the perspective of wide applications when doped by optical active ions. This paper presents the results of spectroscopic studies of single crystals of halides (Cl, Br) of Ce, Pr and Nd. Their spectroscopic behaviour: electron-phonon coupling, ion pair interactions and the effect of covalency, is compared. Absorption, emission and emission excitation spectra of single crystals of LnCl 3·yH2O (Ln = Nd, Pr, Ce; y=6, 7) were recorded at room temperatures and low temperatures down to 4.2K. The intensities of the electronic lines and the Judd-Ofelt parameters were calculated (Nd, Pr) and compared to those of LnBr3·yH2O presented earlier by us. The relationship between the hypersensitivity and covalency was discussed. With increasing soft character of the halides (Br- > Cl-), the covalent character of Ln-ligand bond increases and the hypersensitive bands become more intense. The Judd-Ofelt intensity analysis resulted in a set of τλ parameters evaluated with quite low standard deviations. The temperature dependences of the intensities have been found and the vibronic coupling in the f-f transitions were analysed. At the low temperature (4.2K), strong vibronic components occur in the electronic lines of the Nd(III) and Pr(III) ions, mainly with the Ln-X vibrations. The modes, which are in resonance with the splitting of the ground state multiplet, mediate in the cooperative transitions. Vibrational studies of the compounds under test were performed at the ambient temperature using IR and Raman spectroscopy. The assignment of the bands was done on the basis of the factor group analysis. The spectral features below 300cm-1 point at the differences between the spectra of the bromides and chlorides of Nd and Pr. Although the spectral features within the FIR region are complex, the bands of the praseodymium monocrystals originated by halogen bridges are clearly visible.
Solubility in the LaCl3-LnCl3-HCl-H2O (Ln = Pr, Nd) systems at 25°C
Knyazeva,Skiba,Serba
, p. 592 - 595 (2012/07/14)
The solubility in the quaternary water-salt systems LaCl 3-NdCl3-HCl-H2O (1) and LaCl3- PrCl3-HCl-H2O (2) at 25°C was studied in the section of 40 wt % hydrochloric acid, a system with a eutonic discontinuity. The composition at the point of discontinuity for the eutonic solution is the following. In system 1: 4.67 wt % LaCl3 · 7H2O, 0.37 wt % PrCl3 · 7H2O, 37.98 wt % HCl, and 56.98 wt % H2O; in system 2: 4.37 wt % LaCl3 · 7H 2O, 0.93 wt % NdCl3 · 6H2O, 37.88 wt % HCl, and 56.82 wt % H2O.
Synthesis, structure, and antibacterial properties of ternary rare-earth complexes with o-methylbenzoic Acid and 1,10-phenanthroline1
Chen,Wang,Yang,Zhao,Zhang,Wang,Zhao
, p. 541 - 546 (2009/12/02)
Ternary rare-earth complexes with o-methylbenzoic acid (o-MBA) and 1,10-phenanthroline (Phen) Ln2(o-MBA)6(Phen)2 ? nH2O(n = 0, 1) (Ln = La, Pr, Y, Yb) were synthesized and characterized by elemental analysis, IR
