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

Hanzhong Ke, Wai Kwok Wong, Wai Yeung Wong, Hoi Lam Tam, Chun Ting Poon, Fenglei Jiang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 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 [H2Pc and H2(tBu)4Pc] followed by Na(LOMe). X-ray structural analysis of 3 reveals that the Yb3+ion is seven-coordinate, surrounded by four nitrogen atoms from the phthalocyaninate dianion and three oxygen atoms from the anionic tripodal LLOMeligand. 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. KGaA.
Original languageEnglish
Pages (from-to)1243-1247
Number of pages5
JournalEuropean Journal of Inorganic Chemistry
Issue number9
DOIs
Publication statusPublished - 1 Mar 2009
Externally publishedYes

Keywords

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

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this