(5,10,15,20-tetraphenylporphyrinato)acetatogadolinium(III) | 1335421-91-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 异恶唑并吡啶类
• 英文名称: (5,10,15,20-tetraphenylporphyrinato)acetatogadolinium(III)
• CAS: 1335421-91-4
• 化学式: C₄₆H₃₁GdN₄O₂
• 分子量: 829.028
• InChiKey: PRBNOXUVXVFILD-YKKPBKTHSA-M

反应信息

• 作为产物：
  描述：

  四苯基卟啉 、 gadolinium(III) acetate tetrahydrate 以 further solvent(s) 为溶剂， 以20%的产率得到(5,10,15,20-tetraphenylporphyrinato)acetatogadolinium(III)
  参考文献：
  名称：

  The magnetocaloric effect and the heat capacity of aqueous suspensions of porphyrin complexes of rare earth elements according to microcalorimetric data

  摘要：

  The magnetocaloric effect (MCE) and heat capacity during the magnetization process of (5,10,15,20-tetraphenylporphyrinato)acetatogadolinium(III), (AcO)GdTPP, and (5,10,15,20-tetraphenylporphyrinato)chlorogadolinium(III) complexes, (Cl)GdTPP, in the form of 6%-aqeous suspensions are determined by the microcalorimetric method in a range of temperatures from 278 to 318 K and magnetic fields from 0 to 1 T. It is found that MCE for all the complexes are positive, i.e., at applying a magnetic field in the adiabatic conditions temperature of a suspension of complex increases. It is established that MCE increases with an increase in magnetic induction at all temperatures and decreases with an increase in temperature at all magnetic fields. It is shown that the substitution of chloride ligand by acetate in (X)GdTPP leads to a significant increas in MCE and its temperature dependence; in the case of (Cl)GdTPP actually MCE does not depend on temperature. Relationships between magnetothermal properties and structure of the complexes are analyzed. The conclusion is argumented that the reason of changes in magnetothermal properties after the replacement of axial ligand in gadolinium complexes and complexes of lanthanides with an unsymmetrically filled f-shell is non-planar geometry of the coordination site and specific electronic properties of the central ion. It is concluded that heat capacity of the complexes slightly increases with an increase in temperature and more noticeably in the case of (AcO)GdTPP; a magnetic component of heat capacity is revealed only in (AcO)GdTPP at temperatures above 298 K, which is connected perhaps with a temperature change in the crystal lattice of the complex and influence of the magnetic properties of gadolinium ion on this change.

  DOI：

  10.1134/s0036024412030181