http://dx.doi.org/10.1016/j.saa.2012.08.048">
 

Document Type

Journal Article

Department/Unit

Office of the Vice-President (Research and Development)

Title

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

Language

English

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. © 2012 Elsevier B.V. All rights reserved.

Keywords

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

Publication Date

2012

Source Publication Title

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Volume

98

Start Page

359

End Page

366

Publisher

Elsevier

ISSN (print)

13861425

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