promethium trifluoride | 13709-45-0

• 英文名称: promethium trifluoride
• 英文别名: Promethium fluoride；trifluoropromethium
• CAS: 13709-45-0
• 化学式: F₃Pm
• 分子量: 201.908
• InChiKey: GBTXURQYFJSURZ-UHFFFAOYSA-K

计算性质

• 辛醇/水分配系数(LogP)：
  1.26
• 重原子数：
  4
• 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：
  0
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  promethium trifluoride 以 solid matrix 为溶剂， 以5-10的产率得到
  参考文献：
  名称：

  Gamma‐Induced Divalent Dysprosium in Calcium Fluoride

  摘要：

  Experiments dealing with photochemical and thermal reactions of dysprosium in calcium fluoride are described. Trivalent dysprosium ions doped in calcium fluoride have been reduced by gamma irradiation at room temperature. The efficiency of reduction of Dy3+ in CaF2 is described in terms of the dosage of gamma irradiation and concentration of the dopant ions. The optimum conditions for the photoreduction are given. The absorption band responsible for the reoxidation of the gamma-reduced dysprosium has been determined. It has been established that high densities of gamma-induced defect sites are necessary for the conversion of the majority of divalent ions to the trivalent state, which may be indicative of the tunneling of Dy2+ electrons to hole centers via the gamma-induced defect centers. The tunneling process is also believed to be responsible for the saturation of local and macroscopic concentrations of Dy2+ ions. The thermal reoxidation of Dy2+ ions is accompanied by bright luminescence, the spectrum of which resembles that of the photoluminescence of Dy3+ ions. The decay of the thermoluminescent emission bands is nonexponential, and the reaction kinetics fit the description of a second-order reaction. The evaluated activation energy (0.33 eV) is indistinguishable from the energy required for the thermal ionization of holes from V1 centers in alkali halides.

  DOI：

  10.1063/1.1725628
• 作为产物：
  描述：

  Pm(trifluoromethanesulphonate)3 以 neat (no solvent) 为溶剂， 生成 promethium trifluoride
  参考文献：
  名称：

  Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Sc: MVol.C3, 6.2.2.1.9, page 39 - 39

  摘要：

  DOI：

文献信息

• The determination of fluorine in rare earth fluorides by high temperature hydrolysis
  作者：Charles V. Banks、Keith E. Burke、Jerome W. O'Laughlin

  DOI：10.1016/s0003-2670(00)88149-0

  日期：——

  determination of fluorine in the fluorides of scandium, yttrium, and the lanthanons. These fluorides have been divided into two classes according to their rate of hydrolysls. Lutetium, ytterbium, cerium (III), scandium. gadolinium, terbium, dysprosium, holmium, erbium, and thulium auorides can be hydrolyzed in 30 min or less. Yttrium. lanthanum, praseodymium. neodymlum, samarium, and europium fluorides

  热水解技术已用于测定钪、钇和镧系元素的氟化物中的氟。这些氟化物根据它们的水解速率分为两类。镥、镱、铈 (III)、钪。钆、铽、镝、钬、铒和氧化铥可以在 30 分钟或更短的时间内水解。钇。镧、镨。钕、钐和铕氟化物需要 45 到 150 分钟才能完全水解。加速剂，如氧化铀（U/sub 3/C/sub 8/）、氧化铬（UI）。这些氧化物的混合物已成功地用于减少后一组氟化物定量水解所需的时间。对于除镧、镨和钕之外的所有这些氟化物，使用正确的促进剂可将水解时间缩短至 30 分钟或更短。（授权）
• Thermochemical studies on the lanthanoid complexes of trifluoroacetic acid
  作者：Y. Yoshimura、K. Ohara

  DOI：10.1016/j.jallcom.2004.12.082

  日期：2006.2

  decomposition of the lanthanoid complexes of trifluoroacetic acid (Ln(CF 3 COO) 3 ·3H 2 O; Ln=La-Lu) was studied by TG and DTA methods. The Ln(CF 3 COO) 3 ·3H 2 O complexes decompose in several stages; first dehydrate to the anhydrous state, then followed by decomposition of the anhydrous salt to a stable product of LnF 3 . From the endothermic and exothermic data of Ln(CF 3 COO) 3 ·3H 2 O complexes, pyrolysis

  用TG和DTA方法研究了三氟乙酸镧系元素络合物(Ln(CF 3 COO) 3 ·3H 2 O；Ln=La-Lu)的热分解。Ln(CF 3 COO) 3 ·3H 2 O配合物分几个阶段分解；首先脱水至无水状态，然后将无水盐分解为稳定的 LnF 3 产物。从Ln(CF 3 COO) 3 ·3H 2 O配合物的吸热放热数据来看，配合物的热解行为可分为三类：(1)La-Pr盐类；(2) Nd-Gd盐类；(3) Tb-Lu盐。已经表明，发现所有最终分解产物都导致形成LnF 3 。
• Preparation and paramagnetism of the rare earth trifluorides
  作者：S. Kern、P.M. Raccah

  DOI：10.1016/0022-3697(65)90057-0

  日期：1965.11

  Abstract We have prepared and measured the magnetic susceptibilities of the rare earth trifluorides. They all exhibit moments close to that theoretically expected for the free ion, except at the very low temperatures.

  摘要 我们制备并测量了稀土三氟化物的磁化率。除了在非常低的温度下，它们都表现出接近理论预期的自由离子时刻。
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Sc: MVol.B2, 2.1.1, page 200 - 207
  作者：

  DOI：——

  日期：——
• Wolf, H. O., Diss. Erlangen 1958, S. 1/121
  作者：Wolf, H. O.

  DOI：——

  日期：——