With the Zn-Schiff-base [ZnL(CH 3CN)] from the Salen-type Schiff-base ligand H 2L (H 2L = N,N′-bis(3-methoxy- salicylidene)cyclohexane-1,2-diamine) with the flexible linker as the precursor, a series of hetero-trinuclear Zn 2Ln complexes [Zn 2Ln(L) 2(Cl) 3] (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) are obtained by the further reaction with LnCl 3·6H 2O, respectively. The results of their photophysical studies show that the strong and characteristic NIR luminescence with emissive lifetimes in the microsecond range, has been sensitized from the excited state (both 1LC and 3LC) of the ligand due to the effective intramolecular energy transfer.
Scopus Subject Areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry
- NIR luminescent properties
- Sensitization and energy transfer
- Zn Ln arrayed Schiff-base complexes