Two zinc(II) complexes, [Zn II 2(L 1) 2] (1) and [Zn II 2(L 2) 2] (2), and two cobalt(II) complexes, [Co II 2(L 1) 2] (3) and [Co II 2(L 2) 2] (4), (H 2L 1 = iminophenol derived from the condensation of 4-aminobenzylamine and salicyldehyde, H 2L 2 = Schiff-base of 4-aminobenzylamine and 3,5-di-tert-butylsalicyldehyde) supported by bis(N,O-bidentate) ligands have been synthesized and characterized. X-ray single crystal structures of 3 and 4 revealed the dimeric nature of the complexes with a 1:1 ratio of metal and ligand. The zinc(II) complexes have a very similar composition as established from different analytical and spectroscopic techniques. The iminophenols exhibit highly selective fluorescence enhancement with high quantum yield upon binding with Zn 2+ in solution. A 50-fold enhancement of emission in zinc(II) complexes is observed with respect to free iminophenols.
- Solid state structures
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry