Heteronuclear trimetallic and 1D polymeric 3d-4f Schiff base complexeswith OCN~- and SCN~- ligands

摘要

Reactions of heterobimetallic 3d-4f Schiff base complexes of the formula [ZnLnL(H_2O)(NO_3)_3](la-e)with KOCN or NH_4SCN in refluxing MeCN produce either one dimensional polymeric materials[ZnLnL(NO_3)_2(H_2O)(OCN)]_∞(2a-c)or trinuclear complexes of the formula [Zn_2LnL_2(NO_3)(SCN)_2](3a-e) (a (La), b (Nd), c (Er), d (Tb), e (Eu); H_2L N,N'-bis-(3-methoxysalicylidene)ethylene-1,2-diamine). The structures of 2a,b and 3b-e have been determined by single-crystal X-ray diffractionstudies. Structural differences between the complexes affect the photophysical properties, which havebeen studied in acetonitrile solutions.