7234-35-7 (Name error) | 543689-23-2

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 镧系有机物
• 英文名称: 7234-35-7 (Name error)
• 英文别名: europium(3+);nonahydrate
• CAS: 543689-23-2；58977-64-3
• 化学式: EuH₁₈O₉
• 分子量: 314.098
• InChiKey: PTMBQNCMZWBVLI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -7.42
• 重原子数：
  10
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  9
• 氢给体数：
  9
• 氢受体数：
  9

反应信息

• 作为产物：
  描述：

  europium(III) oxide 、 水 以 高氯酸 为溶剂， 生成 7234-35-7 (Name error)
  参考文献：
  名称：

  Time resolved fluorescence spectroscopy of Eu(III) complexation with α-hydroxy isobutyric acid

  摘要：

  Complexation of Eu(III) with alpha-hydroxy isobutyric acid (HIBA), a model compound of humic acid, has been studied by time resolved fluorescence spectroscopy. The ratio of fluorescence intensity of the two peaks at 616 and 592 nm (l(616/592)) was found to increase with increasing ligand to metal ratio. The l(616/592), data was used to deduce the stability constant of Eu-HIBA complexes of the type MLi (i = 1-3). The formation of multiple ligand complexes was also corroborated by lifetime data which was found to increase with increasing [HIBA]/[Eu] ratio thus indicating replacement of coordinated water molecules by HIBA. (C) 2008 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.saa.2008.02.039

文献信息

• Lanthanide(III) Complexes of 2-[4,7,10-Tris(phosphonomethyl)-1,4,7,10-tetraazacyclododecan-1-yl]acetic Acid (H₇DOA3P): Multinuclear-NMR and Kinetic Studies
  作者：Maria Paula Campello、Marina Balbina、Isabel Santos、Přemysl Lubal、Radek Ševčík、Romana Ševčíková

  DOI：10.1002/hlca.200900176

  日期：2009.11

  trans‐H6DO2A2P but lower than that of H8DOTP. Based on multinuclear‐NMR spectroscopy, the protonation sequence for H7DOA3P was also tentatively assigned. Three protonation constants (pKMHL, pKMH2L, and pKMH3L) were determined for the lanthanide complexes, and the values found are relatively high, although lower than the protonation constants of the related ligand (pK, pK, and pK), indicating that the coordinated

  2- [4,7,10-三（膦酰基甲基）-1,4,7,10-四氮杂环十二烷-1-基]乙酸（H 7 DOA3P）和配合物[Ln（DOA3P）] 4的质子化常数4 −（Ln = Ce，Pr，Sm，Eu和Yb）已通过多核NMR光谱法在pD 2–13.8范围内测定，而没有控制离子强度。在11个质子化步骤中检测到7个（p K = 13.66、12.11、7.19、6.15、5.77、2.99和1.99），发现的值与最近通过电位计确定的H 7 DOA3P以及其他相关值相比较配体。H 7 DOA3P的整体碱度高于H 4 DOTA和trans- H 6 DO2A2P，但低于H 78 DOTP。基于多核NMR光谱学，还初步确定了H 7 DOA3P的质子化序列。确定了镧系元素配合物的三个质子化常数（p K MHL，p K MH2L和p K MH3L），尽管相对于相关配体的质子化常数（p K，p K和p K），表