http://dx.doi.org/10.1016/j.inoche.2012.08.011">
 

Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Photo-luminescent hetero-trinuclear Zn2Ln (Ln = Nd, Yb, Er or Gd) complexes based on the binuclear Zn2L precursor

Language

English

Abstract

With the binuclear Zn 2L ([Zn 2L(OAc) 2(H 2O)], 1) compound from the Salen-type Schiff-base ligand H 2L (H 2L: N,N′-bis(salicylidene)cyclohexane- 1,2-diamine) with the flexible linker as the precursor, a series of hetero-trinuclear Zn 2Ln complexes (Ln = Nd (2), Ln = Yb (3), Ln = Er (4) or Ln = Gd (5)) have been obtained by further reaction with Ln(OAc) 3·6H 2O. The result of their photophysical properties shows that the strong and characteristic NIR luminescence with emissive lifetimes in the ranges of microseconds for each of the complexes 2-4, has been sensitized from the excited state ( 1LC and 3LC) of the Salen-type Schiff-base ligand with the flexible linker. Especially, the almost planar arrangement of two energy donors of ZnL components around the Ln 3 + ion for the larger conjugation effect, endowing the energy level's good match between the excited state ( 3LC) of the chromophore to the corresponding Ln 3 + ion's exciting state, results in the enhancement of their NIR luminescence. © 2012 Elsevier B.V. All rights reserved.

Keywords

Binuclear Zn 2, Hetero-trinuclear Zn 2Ln complexes, NIR luminescence, Schiff-base

Publication Date

2012

Source Publication Title

Inorganic Chemistry Communications

Volume

24

Start Page

148

End Page

152

Publisher

Elsevier

ISSN (print)

13877003

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