guanidinium iodoplumbate(II) | 201226-81-5

• 分子结构分类: 有机化合物 - 有机氮化合物
• 英文名称: guanidinium iodoplumbate(II)
• CAS: 201226-81-5
• 化学式: CH₆N₃*I₃Pb
• 分子量: 647.992
• InChiKey: LCZCPZNUFRISAN-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  -12.35
• 重原子数：
  8.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  77.63
• 氢给体数：
  3.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  lead acetate 、 胍氢碘酸盐 以 水 为溶剂， 生成 guanidinium iodoplumbate(II) 、 guanidinium diiodoplumbate(II)
  参考文献：
  名称：

  Investigation of phase instabilities in guanidinium halogenoplumbates(II)

  摘要：

  Four new compounds based on guanidinium and halogenoplumbate(II) ions, [C(NH2)(3)](2)PbCl4, [C(NH2)(3)](2)PbBr4, [C(NH2)(3)](2)PbI4 and C(NH2)(3)PbI3, have been studied by differential thermal analysis and X-ray powder diffraction. In the chloride, four thermal anomalies have been detected at 345, 383, 412-419 and 439 K, indicating the possibility of four first-order phase transitions; the estimated transition entropies suggest the existence of phase disordering above 439 K. It was established that the phase sequences occurring on heating and on cooling the substance are different. The bromide compound undergoes two successive first-order phase transitions at 406-415 and 426 K, both associated with a large transition entropy indicating disordering of the intermediate-and high-temperature phases. In the tetraiodide, a continuous phase transition to the disordered phase was found at 307 K, while the triiodide undergoes two first-order phase transitions at 255 and 432 K, respectively Both phase transitions in C(NH2)(3)PbI3 are of the order-disorder type, the high-temperature phase exhibits metastable properties.The spectroscopic changes observed at the high-temperature phase transitions in [C(NH2)(3)](2)PbBr4 and C(NH2)(3)PbI3 indicate that the mechanism of these transformations is connected both with a disordering process and a distortion of the anionic sublattices. (C) 1997 Published by Elsevier Science B.V.

  DOI：

  10.1016/s0040-6031(97)00408-5

文献信息

• Temperature dependent phase transitions and their relation to isosbestic point formation. Case study of C(NH2)3PbI3
  作者：M. Bukleski、S. Dimitrovska-Lazova、S. Aleksovska

  DOI：10.1016/j.saa.2021.120462

  日期：2022.2

  transitions in guanidinium lead iodide (GAPbI3) using vibrational spectroscopy techniques (IR and Raman) are presented. In addition to the well-known three phases of GAPbI3 (denoted as I, II and III) another one existing in the temperature range from 48 °C to 160 °C is characterized. The thorough inspection of the vibrational spectra revealed some interesting changes occurring in the low temperature

  除了对太阳能电池生产中使用的杂化有机-无机钙钛矿（HOIP）材料进行了大量研究外，它们的特性仍未完全揭开。在本文中，介绍了使用振动光谱技术（IR 和拉曼）对胍基碘化铅 (GAPbI 3 ) 中的相变进行的详细研究。除了众所周知的三相 GAPbI 3(记为I、II和III)表征存在于48°C至160°C的温度范围内的另一种。对振动光谱的彻底检查揭示了低温区域（从 –90 到 –62 °C）发生的一些有趣变化，表明存在新相。最后，建议根据 IUCr 给出的建议重新定义相位命名法。