Enneahalodimetallates(III) of rare earth elements with the hexagonal Cs3Tl2Cl9-(h)6-type structure
作者:Gerd Meyer、Andreas Schönemund
DOI:10.1016/0025-5408(80)90163-4
日期:1980.1
and bromodimetallates(III) of rareearthelements Cs 3 RE 2 X 9 , of which only a few have been observed in a phase diagram, were prepared and investigated by Guinier-Simon X-ray technique. Except for Cs 3 Sc 2 Br 9 (isotypic with Cs 3 Cr 2 Cl 9 ) they - for RE = Sc, Y,Ho-Lu, X = Cl as well as RE = Sc, Sm-Lu, X = Br - crystallize with the Cs 3 Tl 2 Cl 9 -type structure.
摘要 利用Guinier-Simon X射线技术制备和研究了稀土元素Cs 3 RE 2 X 9 的烯氯和溴二金属化物(III),其中只有少数在相图中观察到。除了 Cs 3 Sc 2 Br 9 (与 Cs 3 Cr 2 Cl 9 同型)它们 - 对于 RE = Sc, Y,Ho-Lu, X = Cl 以及 RE = Sc, Sm-Lu, X = Br - 结晶具有Cs 3 Tl 2 Cl 9 型结构。
Thermal decomposition of formates. Part IX. Thermal decomposition of rare earth formate anhydrides
作者:Yoshio Masuda
DOI:10.1016/0040-6031(83)80108-7
日期:1983.9
Abstract The thermaldecomposition of rare earth formate anhydrides in a flowing nitrogen atmosphere was studied systematically by means of thermogravimetry and differential thermal analysis. The decomposition consisted of two or three stages 2 Ln(HCO 2 ) 3 → 2 LnO(HCO 2 ) → Ln 2 O 2 ·CO 3 → Ln 2 O 3 The monoxyformate did not appear in the decomposition of the lighter element formates except for lanthanum
Electrochemistry of lanthanoid(III) complexes in dimethyl sulfoxide in the presence of n-Bu4N(acac) and n-Bu4N(dibm)
作者:Akio Iwase、Yoshinori Araki、Reiko Takahashi
DOI:10.1016/0013-4686(90)87070-i
日期:1990.11
lanthanoid Ln(III) complexes was investigated in Me2SO including n-Bu4N(acac) and n-Bu4N(dibm) as ligands (where acac is the acetylacetonate anion and dibm is the diisobutrylmethanate anion). Reversible one electron reduction waves corresponding to Ln(III) complexes→Ln(II) complexes were observed in the concentration range of 5–20 mM of the ligands, including 1 mM lanthanoid perchlorates and 0.1 M TEAP
镧系LN(III)络合物的电化学行为在我研究了2 SO包括Ñ -Bu 4 N(ACAC)和Ñ -Bu 4 N(dibm)作为配体(其中ACAC是乙酰丙酮化物阴离子和dibm是diisobutrylmethanate阴离子) 。在5–20 mM的配体浓度范围内观察到了对应于Ln(III)配合物→Ln(II)配合物的可逆的一个电子还原波,包括1 mM镧系高氯酸盐和0.1 M TEAP。在存在5 mM配体的情况下,在0.1 M TEAP中,镧系元素络合物的半波电势为sce -1.66至-2.61 V ,具体取决于镧系元素(III)离子。
Luminescent lanthanide complexes with phosphoramide and arylphosphonic diamide ligands
transitions of the metal centre, with the exception of the carbazolyl derivative. Some of the ligands were also able to sensitize Tb(III) luminescence, in agreement with the triplet state energies estimated from the phosphorescence spectra of the analogous Gd(III) nitrates. On the basis of the photoluminescence results achieved using nitrate as ancillary ligand, heptacoordinate Eu(III) complexes having general
磷酰胺和芳基膦酸二酰胺配体OP(NMe 2)2 Ind,OP(NMe 2)2 Cbz,OP(NMe 2)2 Ph,OP(NMe 2)2(1-Naph)对Eu(III)发光的敏化和OP(NMe 2)2(2-Naph)(Ind =吲哚-1-基; Ph =苯基; Cbz =咔唑-9-基; 1-Naph =萘-1-基; 2-Naph =萘-2 -Eyl)通过与[Eu(NO 3)3 ]金属片段配位而得到验证。相应配合物的发射光谱仅显示5 D 0 → 7 F J除咔唑基衍生物外,金属中心的过渡。一些配体还能够敏化Tb(III)发光,这与从类似的硝酸Gd(III)的磷光光谱估计的三重态能量一致。基于使用硝酸盐作为辅助配体获得的光致发光结果,具有通式[Eu(β-dike)3 L]的七配位Eu(III)配合物(β-dike=二苯甲酰甲烷酸酯,丁酰基三氟丙酮酸酯; L =磷酰胺或芳基磷酸二酰胺配体)被准备
Equilibria and Structure of the Lanthanide(III)-2-hydroxy-1,3-diaminopropane-<i>N</i>,<i>N</i>,<i>N</i>‘,<i>N</i>‘-tetraacetate Complexes: Formation of Alkoxo-Bridged Dimers in Solid State and Solution
作者:Gyula Tircsó、Attila Bényei、Ernõ Brücher、Anita Kis、Róbert Király
DOI:10.1021/ic0517321
日期:2006.6.1
The proton relaxivities of the Gd3+ complex decrease with the increase of pH, and at pH > 6, the low relaxivity values indicate the probable absence of H2O in the inner sphere and the predominance of the eight-coordinated dimer species [Gd2(L-O)2].4- The results of ESI-TOF MS studies of the complexes of La3+, Nd3+, and Lu3+ proved the formation of dinuclear dimers in dilute (0.25 mM) solutions. pH-potentiometric