Scholarlink

<p>Manganese(<span>iii</span>) porphyrin complexes form covalent and coordination pairs with electron acceptors, which are of interest for the fabrication of solar cells due to the photoinduced electron transfer property. In order to determine the nature of the photoexcitation processes in the donor part of these pairs, in this work the excited electronic states of manganese(<span>iii</span>) complexes with 5,10,15,20-tetraphenylporphyrin ((AcO)MnTPP), 5,10,15,20-tetra(4-methylphenyl)porphyrin ((AcO)MnTTP), and 5,10,15,20-tetra(4-<i>tert</i>-butylphenyl)porphyrin ((AcO)MnTBPP) are studied by femtosecond photoinduced absorption spectroscopy. The parameters of the differential absorption spectra of the complexes in toluene, methanol, and tetrahydrofuran are determined, and their interpretation is given. The lifetimes of the excited state, depending on the nature of the substituent in the macrocycle and the solvent, are determined by modeling the kinetics of photo-induced absorption. A dependence of the lifetime of the excited state of manganese(<span>iii</span>) porphyrins on the polarity and the coordination ability of the solvent, as well as a weak dependence on the nature of the porphyrin macrocycle, are demonstrated.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Femtosecond dynamics of excited electronic states of manganese(iii) porphyrin complexes

  • 期刊论文

  • 发表日期：

    2025年5月1日

查看全文
  • E. N. Ovchenkova,
  • N. G. Bichan,
  • I. V. Shelaev,
  • F. E. Gostev,
  • T. N. Lomova

摘要

Manganese(iii) porphyrin complexes form covalent and coordination pairs with electron acceptors, which are of interest for the fabrication of solar cells due to the photoinduced electron transfer property. In order to determine the nature of the photoexcitation processes in the donor part of these pairs, in this work the excited electronic states of manganese(iii) complexes with 5,10,15,20-tetraphenylporphyrin ((AcO)MnTPP), 5,10,15,20-tetra(4-methylphenyl)porphyrin ((AcO)MnTTP), and 5,10,15,20-tetra(4-tert-butylphenyl)porphyrin ((AcO)MnTBPP) are studied by femtosecond photoinduced absorption spectroscopy. The parameters of the differential absorption spectra of the complexes in toluene, methanol, and tetrahydrofuran are determined, and their interpretation is given. The lifetimes of the excited state, depending on the nature of the substituent in the macrocycle and the solvent, are determined by modeling the kinetics of photo-induced absorption. A dependence of the lifetime of the excited state of manganese(iii) porphyrins on the polarity and the coordination ability of the solvent, as well as a weak dependence on the nature of the porphyrin macrocycle, are demonstrated.