Hetero-binuclear near-infrared (NIR) luminescent Zn-Nd complexes self-assembled from the benzimidazole-based ligands

Dan Zou, Weixu Feng*, Guoxiang Shi, Xingqiang Lü, Zhao Zhang, Yao Zhang, Han Liu, Daidi Fan, Rick W K WONG, Richard A. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

With the compound [Zn(HL1)2(Py)] (H2L 1 = 2-(1H-benzo[d]imidazol-2-yl)-6-methoxyophenol), Py = pyridine) or [Zn(HL2)2(Py)] (H2L2 = 2-(1H-benzo[d]imidazol-2-yl)-4-bromo-6-methoxyphenol) as the precursor, complexes [ZnLn(HL1)2(Py)(NO3)3] (Ln = Nd, 1; Ln = Gd, 2) or [ZnLn(HL2)2(Py)(NO 3)3] (Ln = Nd, 3; Ln = Gd, 4) were obtained by the further reaction with Ln(NO3)3·6H2O (Ln = Nd or Gd). The result of their photophysical properties shows that the strong and characteristic near-infrared (NIR) luminescence of Nd3+ ions for complexes 1 and 3 with emissive lifetimes in microsecond range, has been sensitized from the excited state (1LC and 3LC) of the benzimidazole-based ligands, and the involvement of heavy atoms (Br) at the ligand endows the enhanced NIR luminescent property.

Original languageEnglish
Pages (from-to)359-366
Number of pages8
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume98
DOIs
Publication statusPublished - Dec 2012

Scopus Subject Areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

User-Defined Keywords

  • Sensitization and energy transfer
  • UV-vis absorption
  • Visible and NIR luminescence
  • Zn-Ln arrayed benzimidazole-based complexes

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