Near-infrared (NIR) luminescent hetero-tetranuclear Zn2Ln 2 (Ln = Nd, Yb or Er) complexes self-assembled from the benzimidazole-based HL and two rigid 4,4′-bipyridine ligands with different spacers

Zhao Zhang, Weixu Feng*, Peiyang Su, Han Liu, Yao Zhang, Zheng Wang, Tiezheng Miao, Xingqiang Lü, Daidi Fan, Rick W K WONG, Richard A. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

(Chemical Equation Presented) Through the self-assembly of the benzimidazole-based ligand HL (HL = 2-(1H-benzo[d]imidazol-2-yl)-6- methoxyphenol) with Zn(OAc)2·2H2O, Ln(NO 3)3·6H2O (Ln = Nd, Yb, Er or Gd) and 4,4′-bipyridine ligand (bpy, 4,4′-bipyridine or bpe, trans-bis(4-pyridyl)ethylene), two series of Zn2Ln 2-arrayed complexes [Zn2Ln2(L) 4(bpy)(NO3)6] (Ln = Nd, 1; Yb, 2; Er, 3 or Gd, 4) and [Zn2Ln2(L)4(bpe)(NO3) 6] (Ln = Nd, 5; Yb, 6; Er, 7 or Gd, 8) were obtained, respectively. The result of their photophysical properties shows that the characteristic near-infrared (NIR) luminescence of Nd3+, Yb3+ or Er 3+ ion has been sensitized from the excited state (both 1LC and 3LC) of the mixed HL and bipyridyl ligands in both complexes 1-3 and 5-7. Moreover, the change from bpy to bpe bridging for the fine-tuning of whole molecular conjugations, attributing to the different crossings of the two benzimidazole-based L- ligands, has the important influence on their NIR luminescent properties.

Original languageEnglish
Pages (from-to)102-110
Number of pages9
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume116
DOIs
Publication statusPublished - 2013

Scopus Subject Areas

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

User-Defined Keywords

  • Complexes
  • Mixed HL-bipyridine ligands
  • Sensitization of NIR luminescence

Fingerprint

Dive into the research topics of 'Near-infrared (NIR) luminescent hetero-tetranuclear Zn<sub>2</sub>Ln <sub>2</sub> (Ln = Nd, Yb or Er) complexes self-assembled from the benzimidazole-based HL and two rigid 4,4′-bipyridine ligands with different spacers'. Together they form a unique fingerprint.

Cite this