Photo-luminescent hetero-trinuclear Zn 2Ln (Ln = Nd, Yb, Er or Gd) complexes based on the binuclear Zn 2L precursor

Yao Zhang, Weixu Feng*, Han Liu, Zhao Zhang, Xingqiang Lü, Jirong Song, Daidi Fan, Rick W K WONG, Richard A. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

With the binuclear Zn 2L ([Zn 2L(OAc) 2(H 2O)], 1) compound from the Salen-type Schiff-base ligand H 2L (H 2L: N,N′-bis(salicylidene)cyclohexane- 1,2-diamine) with the flexible linker as the precursor, a series of hetero-trinuclear Zn 2Ln complexes (Ln = Nd (2), Ln = Yb (3), Ln = Er (4) or Ln = Gd (5)) have been obtained by further reaction with Ln(OAc) 3·6H 2O. The result of their photophysical properties shows that the strong and characteristic NIR luminescence with emissive lifetimes in the ranges of microseconds for each of the complexes 2-4, has been sensitized from the excited state ( 1LC and 3LC) of the Salen-type Schiff-base ligand with the flexible linker. Especially, the almost planar arrangement of two energy donors of ZnL components around the Ln 3 + ion for the larger conjugation effect, endowing the energy level's good match between the excited state ( 3LC) of the chromophore to the corresponding Ln 3 + ion's exciting state, results in the enhancement of their NIR luminescence.

Original languageEnglish
Pages (from-to)148-152
Number of pages5
JournalInorganic Chemistry Communication
Volume24
DOIs
Publication statusPublished - Oct 2012

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

User-Defined Keywords

  • Binuclear Zn
  • Hetero-trinuclear Zn Ln complexes
  • NIR luminescence
  • Schiff-base

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