ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis and Infrared and Fluorescence Spectra of Europium and Terbium Complexes with a Novel Bis-Schiff Base Ligand Derived from 2,6-Diaminopyridine and Indole-2-carbaldehyde

T. L. Yang, W. W. Qin, Z. F. Xiao, and W. S. Liu

Department of Chemistry and State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou, 730000 P. R. China

E-mail: liuws@lzu.edu.cn

Received: 19 July 2003

Abstract: A new bis-Schiff base ligand 2,6-bis[(indol-2-ylmethylene)amino]pyridine, and its complexes with europium and terbium were synthesized. The complexes were characterized by elemental analysis, infrared spectra, and conductivity. The europium and terbium ions were found to coordinate to the C=N nitrogen atoms, pyridine nitrogen atoms, and indole nitrogen atoms. The fluorescence properties of these complexes in DMSO, DMSO/CH ₃ OH, and CH ₃ OH were studied. Under the excitation of UV light, these complexes exhibit characteristic fluorescence of europium and terbium ions. The solvent factors influencing the fluorescence intensity are discussed.

Full paper in Portable Document Format: 591a17.pdf

Chemical Papers 59 (1) 17–20 (2005)