10025-84-0Relevant articles and documents
Hydrothermal synthesis and structural studies of novel 2-D lanthanide coordination polymers with phthalic acid
Wan, Yonghong,Jin, Linpei,Wang, Kezhi,Zhang, Liping,Zhenga, Xiangjun,Lub, Shaozhe
, p. 1590 - 1596 (2002)
This paper presents four lanthanide coordination polymers, [Ln2(BDC)3(H2O)]n (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3; BDC = 1,2-benzenedicarboxylate) and [Yb4(BDC)6(H2O)2]n (4) prepared by the hydrothermal technique. They are all 2-D infinite structures with BDC anions connecting adjacent metal ions. In complex 1, La(III) ions are eight- and nine-coordinated, and all La(III) ions are coplanar in the 2-D structure. In complexes 2 and 3, Eu(III) and Tb(III) ions are also eight- and nine-coordinated, but they are distributed in a wave-like 2-D network. In complex 4, the Yb(III) ions have four different coordination numbers (6, 7, 8 and 9), which are rarely found in one lanthanide complex. Both the coordination numbers and the arrangement of Ln atoms in these coordination polymers show the lanthanide contraction. In the four complexes, all the oxygen atoms of BDC take part in coordination with Ln(III) ions, adopting tetra-, penta- and hexadentate coordination modes for the phthalate anions. The luminescent properties of complex 2 have been investigated and the results for the explanation of the chemical environment of the Eu(III) ion are consistent with the X-ray analysis.
Struktur der hexagonalen Mofifikation von Lanthan(III) trichlorid trihydrat
Reuter, Gert,Frezen, Gerlinde
, p. 844 - 845 (1994)
The crystal structure of the title compound (LaCl3*3H2O) in its hexagonal modification has been determined from 141 independent observed reflections.Each unit cell consists of one formula unit of LaCl3*3H2O, forming straight chains along .The parallel chains create a structure with alternating Cl- and La3+/H2O layers in the direction.The coordination geometry of the La3+ cation can be described as a trigonal prism of bridging Cl- anions with terminal water molecules capping each rectangular face of the prism.The coordination number of the La3+ cation is nine.
Synthesis and structural characterization of new lanthanide coordination polymers with nitrilotriacetic acid
Huang, Liang,Zhang, Li-Ping,Jin, Lin-Pei
, p. 121 - 126 (2004)
Reported herein are the hydrothermal synthesis and crystal structures of four lanthanide coordination polymers with nitrilotriacetic acid (H 3NTA) [Ln(NTA)(H2O)]n (Ln=La, 1; Pr, 2; Nd, 3; Eu, 4). Despite similar syntheses, compounds 1 to 4 show transformation in coordination mode of NTA and coordination number of Ln3+ duo to lanthanide contraction. The Ln(III) ions in 1 and 2 are nine-coordinated and connected through octadentate bridging ligands (NTA) to form a three-dimensional network. The Ln(III) ions in 3 and 4 are eight-coordinated and bridged by heptadentate bridging ligands (NTA) to form an extended two-dimensional layer structure, which further construct a three-dimensional supramolecular structure via coordination bond and three-centered hydrogen bonding between adjacent layers.
Synthesis, structure, thermal and luminescent behaviors of lanthanide-Pyridine-3,5-dicarboxylate frameworks series
?yszczek, Renata
, p. 120 - 127 (2010)
The isostructural series of lanthanide pyridine-3,5-dicarboxylates of the formula [Ln2pdc3(dmf)2]·(dmf) x(H2O)y where Ln are lanthanides from La(III) to Lu(III); pdc2--C5/s
Hydrothermal synthesis and characterization of novel lanthanide 2,2′-diphenyldicarboxylate complexes
Wang, Yi-Bo,Zheng, Xiang-Jun,Zhuang, Wen-Juan,Jin, Lin-Pei
, p. 1355 - 1360 (2003)
Lanthanide complexes with a one-dimensional chain, [Ln2(dpdc)3(H2O)2]n [Ln = La (1), Pr (2), Eu (3), Tb (4); dpdc = 2,2′-diphenyldicarboxylate] were obtained by hydrothermal reaction of lanthanide(III) chlorides and 2,2′-diphenyldicarboxylic acid, and characterized by X-ray diffraction. The crystal structure data reveal that they are isostructural. In the asymmetric unit, the two Ln3+ ions are both eight-coordinate but they have different coordination environments. Lanthanide ions arranged in a zigzag manner are bridged by the dpdc ligands into a 1-D chain, while the structure appears like a pinwheel viewed along the c axis. In these complexes, 2,2′-diphenyldicarboxylate anions exhibit tetradentate and pentadentate coordination modes. A laser-induced high-resolution spectrum (resolution: 0.2 cm-1) of 3 was obtained, which shows two Eu3+ sites in 3. This is in agreement with the results of single-crystal X-ray diffraction studies of 3. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Facile solid-state chemical synthesis of novel ternary lanthanide complexes at room temperature
Yang, Xiao-Fei,Zhang, Rong-Xian,Yao, Fan,Ouyang, Wei-Meng
, p. 37 - 41 (2012)
This paper reports a facile one-step synthesis of two ternary lanthanide complexes via room temperature solid-state reactions of lanthanide chloride hydrates with two ligands, potassium sorbate (PS), and 8-hydroxyquinoline (8-hq). The structural features, composition, and the morphologies of two complexes are characterized by elemental analysis, UV-Vis, FT-IR, XRD, SEM, and EDX. The thermal property of two ternary lanthanide complexes was also investigated. UV-Vis and FT-IR results confirm the coordination of lanthanide ion with two ligands. XRD results show that signals of complexes are not from reactants, and are believed to originate from the corresponding ternary lanthanide complex.
Thermochemical properties of the rare earth complexes with pyromellitic acid
Wang, Lijun,Liu, Fei,Yang, Xuwu,Wang, Xiaoyan,Liu, Ruiping,Zhao, Sa,Chen, Sanping
, p. 43 - 46 (2009)
Fourteen rare earth complexes with pyromellitic acid were synthesized and characterized by means of chemical and elemental analysis, and TG-DTG. The constant-volume combustion energies of complexes, ΔcU, were measured by a precise rotating-bomb
Metal poly(benzimidazol-1-yl)borates. Synthesis and spectral characterization of some lanthanide chelates of hydridotris- and tetrakis(benzimidazol-1-yl)borate anions
Khan, Tabrez A.,Khan, M. Arif,Khan,Haq
, p. 297 - 308 (2003)
Complexes of La(III), Nd(III), Pr(III), Sm(III), Tb(III), Dy(III), Ho(III), Er(III) and Yb(III) with hydridotris- and tetrakis(benzimidazol-1-yl) borate anions (L1 and L2) have been prepared and characterized. The spectral parameters β, b1/2, δ% and η, evaluated from the electronic spectra of the Pr, Nd, Sm, Ho and Er complexes, suggest the presence of a weak covalent contribution in the metal-ligand bond. The IR spectral data reveal that both L1 and L2 behave as tridentate ligands coordinating via the pyridyl and pyrrolic nitrogen atoms of the benzimidazolyl groups.
Synthesis, characterization and biological activity of rare earth complexes of 1-phenyl-3-methyl-5-hydroxy-4-pyrazolyl phenyl ketone isonicotinoyl hydrazone
Yang, Zhengyin,Yang, Rudong,Li, Qi,Fashen, Li
, p. 205 - 214 (1999)
The ligand, 1-phenyl-3-methyl-5-hydroxy-4-pyrazolyl phenyl ketone isonicotinoyl hydrazone (H2L), was prepared by condensation of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone with isoniazid. Seven complexes of rare earths with H2L have be
Poly[[tetra-aqua-tris(μ3-2,2-dimethyl-malonato) dilanthanum(III)] mono-hydrate]
Guo, Ming-Lin,Guo, Chen-Hu
, (2009)
In the title complex, {[La2(C5H6O4)3(H2O)4]·H2O} n , the La atoms are connected by bridging O atoms from carboxyl-ate groups to build, through centres of inversion, two-dimensional layers parallel to the ac plane containing deca-nuclear 20-membered rings.
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