Hetero-trinuclear near-infrared (NIR) luminescent Zn2Ln complexes from Salen-type Schiff-base ligands

Weiyu Bi, Tao Wei, Xingqiang Lü*, Yani Hui, Jirong Song, Shunsheng Zhao, Rick W K WONG, Richard A. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

With the Zn-Schiff-base [ZnL1(Py)] or [ZnL2(Py)] from the simple Salen-type Schiff-base ligand H2L1 or H 2L2 (H2L1: N,N′- bis(salicylidene)ethylene-1,2-diamine; H2L2: N,N′-bis(salicylidene)phenylene-1,2-diamine) without the outer O 2O2 portion as the precursor, two series of eight trinuclear Zn2Ln arrayed complexes (Ln = Nd (1 or 5), Yb (2 or 6), Er (3 or 7) or Gd (4 or 8)) have been obtained by the further reaction with Ln(NO3)3·6H2O, respectively. The results of photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in microsecond ranges, has been sensitized from the excited state (1LC and 3LC or only 1LC) of the ligand, whereas the Zn(ii)-based visible luminescence is mostly quenched because of quite effective intramolecular energy transfer from the ligand-centered excited state of the Zn(ii)-Schiff base complex to Ln(iii) ions.

Original languageEnglish
Pages (from-to)2326-2334
Number of pages9
JournalNew Journal of Chemistry
Volume33
Issue number11
DOIs
Publication statusPublished - 2009

Scopus Subject Areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

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