Synthesis and photophysical properties of rare earth complexes bearing silanediamido ligands Me2Si(NAryl)(2)(2-) (Aryl = Dipp, Mes)

Olga A. Mironova, Daniil Lashchenko, Aleksey A. Ryadun, Taisiya S. Sukhikh, Denis A. Bashirov, Nikolay A. Pushkarevsky, Sergey N. Konchenko

Research output: Contribution to journalArticlepeer-review

Abstract

A series of rare earth (RE) chloride complexes bearing silanediamido ligands (LAryl)2- = Me2Si(NAryl)22- with bulky substituents, Aryl = mesityl (Mes), and 2,6-diisopropylphenyl (Dipp) was synthesized by salt metathesis reactions. Binuclear species [{RE(LAryl)(thf)2}2(μ-Cl)2] (REAryl; RE = Y, Gd, Tb, Sm, Aryl = Dipp; RE = Y, Gd, Tb, Aryl = Mes) crystallize from non-polar solvents. Deprotonation reactions of proligands H2LAryl by KH and n-BuLi are compared, and the advantages of both approaches are discussed. Formation of ate complexes [{RE(LAryl)(thf)(μ-Cl)2Li(thf)3}2(μ-Cl)2] (RE = Y, Tb) was detected when using n-BuLi. Recrystallization of YDipp from pure thf led to the monomerization to the [Y(LDipp)Cl(thf)3] complex. Energies of the triplet states were determined for both ligands from the photoluminescence (PL) spectra of Gd complexes. The PL of Tb complexes in the solid state and in a solution was studied, showing substantial sensitization by the (LAryl)2- ligands.

Original languageEnglish
Pages (from-to)2351-2359
Number of pages9
JournalNew Journal of Chemistry
Volume46
Issue number5
DOIs
Publication statusPublished - 7 Feb 2022

Keywords

  • METAL ALKYL COMPLEXES
  • X-RAY-DIFFRACTION
  • STRUCTURAL-CHARACTERIZATION
  • ISOPRENE POLYMERIZATION
  • SANDWICH COMPLEXES
  • PRECURSORS
  • DERIVATIVES
  • REDUCTION
  • CHEMISTRY
  • CATALYSIS

OECD FOS+WOS

  • 2.04 CHEMICAL ENGINEERING
  • 1.04 CHEMICAL SCIENCES
  • 2.05 MATERIALS ENGINEERING

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