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Synthesis and Structure of [{Ln(Me2Si(NMes)2)(THF)2}2(μ-L)2] (L = \(\mathbf{BH}_{\mathbf{4}}^{-}\), Ln = Y, Dy; L = PhS–, Ln = Y, Tb, Dy) Complexes

  • 期刊论文

  • 发表日期：

    2024年3月1日

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  • D. A. Bashirov,
  • D. I. Lashchenko,
  • T. S. Sukhikh,
  • S. N. Konchenko

摘要

Abstract

New silanediamide complexes of rare-earth elements are synthesized: [{Dy(Me2Si(NMes)2)(THF)2}2(μ-Cl)2] (Dy1), [{Ln(Me2Si(NMes)2)(THF)2}2(μ-BH4)2] (Ln2, Ln = Y, Dy), and [{Ln(Me2Si(NMes)2)(THF)2}2 (μ-SPh)2] (Ln3, Ln = Y, Tb, Dy), Mes = 2,4,6-(CH3)C6H2=mesityl. The compounds are isolated as crystalline phases Dy1, Ln2 (Ln = Y, Dy), Y3·2THF, Tb3·2C7H8, Dy3·2THF, and Dy3·2C7H8 and characterized by single crystal X-ray diffraction. All complexes have a binuclear structure; a silanediamide ligand is chelated to each Ln atom, and Cl–, \(\text{BH}_{4}^{-}\) , or SPh– act as bridges. By photoluminescence spectroscopy of the solutions of Tb and Dy complexes in THF it is shown that (Me2Si(NMes)2)2– is an effective ligand antenna, which sensitizes metal-centered emission of these lanthanides.