Synthesis, crystal structure, and photophysieal properties of novel (Monophthalocyaninato)lanthanide complexes stabilized by an organometallic tripodal ligand

Hanzhong Ke, Rick W K WONG, Wai Yeung WONG, Hoi Lam TAM, Chun Ting Poon, Fenglei Jiang

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

An unprecedented series of (monophthalocyaninato)lanthanide(III) complexes {[PcYb(LOMe)] (3) and [(tBu)4PcLn(LOMe)] [Ln = Yb (4), Er (5)]} {Pc = phthalocyaninate, LOMe = [(cyclopentadienyl) tris(dimethylphosphito)cobaltate(III)]} were prepared by the reaction of Ln[N(SiMe3)2]3 [LiCl(THF)3] x (Ln = Yb or Er) with the corresponding phthalocyanine [H 2Pc and H2(tBu)4Pc] followed by Na(L OMe). X-ray structural analysis of 3 reveals that the Yb 3+ion is seven-coordinate, surrounded by four nitrogen atoms from the phthalocyaninate dianion and three oxygen atoms from the anionic tripodal LLOMe ligand. The photophysical properties of these new mixed-metal (monophthalocyaninato)lanthanide complexes are investigated. An efficient intramolecular energy transfer from ligand-centered states to the metal ion manifold or metal-centered states takes place for the Er3+ complex, but there is a significant back-energy transfer for the Yb3+ complex. Singlet oxygen (1O2) phosphorescence was detected instead of the Yb3+ emission in the photoluminescence spectra of 3 and 4 in the NIR region, but only the Er3+ ion emission was observed for 5.

Original languageEnglish
Pages (from-to)1243-1247
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number9
DOIs
Publication statusPublished - Mar 2009

Scopus Subject Areas

  • Inorganic Chemistry

User-Defined Keywords

  • Lanthanides
  • Near-infrared emission
  • Phthalocyanines
  • Tripodal ligands

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