Effective enhancement of near-infrared emission by carbazole modification in the Zn-Nd bimetallic Schiff-base complexes

Shunsheng Zhao, Xiangrong Liu, Weixu Feng, Xingqiang Lü*, Wai Yeung WONG, Rick W K WONG

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

22 Citations (Scopus)

Abstract

With ZnL 1 or ZnL 2 from the simple Salen-type Schiff-base ligand H 2L 1 (H 2L 1 N,N′-bis(3-methoxysalicylidene)-ethylene-1,2-diamine) or the carbazole-modified Salen-type Schiff-base ligand H 2L 2 (H 2L 2 N,N′-bis(3-methoxy-5-{2-[4-(N-carbazyl)- phenyl]-ethynyl}-ethylene-1,2-diamine) as the precursor, two series of four bimetallic ZnLn complexes (Ln=Nd(1 or 3), Ln=Gd (2 or 4) are obtained, respectively. The photophysical properties results showed that the sensitization from the excited state ( 1LC and 3LC) of the ligand H 2L 1 or H 2L 2 and the effective energy transfer of Zn 2+-Schiff-base (ZnL 1 or ZnL 2) to the Nd 3+ ion for the NIR luminescence were realized, respectively. Especially through the cabarzole modification, the improved NIR luminescence of the ZnNd complex 3 was observed due to the realization of the energy level's match of the excited state of the chromophore to the Nd 3+ ion's exciting state.

Original languageEnglish
Pages (from-to)41-45
Number of pages5
JournalInorganic Chemistry Communications
Volume20
DOIs
Publication statusPublished - Jun 2012

Scopus Subject Areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

User-Defined Keywords

  • Carbazole modification
  • Enhanced NIR luminescence
  • Sensitization and energy transfer
  • ZnNd binuclear Schiff-base complex

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