Abstract
Heterometallic {Zn-Ln}-complexes [Zn2Ln(OH)(Piv)4(NO3)2(pyzphen)2], where Ln is Eu (1), Gd (2) or Tb (3), Piv- is an anion of pivalic acid and pyzphen is pyrazino[2,3-f][1,10]phenanthroline, were synthesized. Crystallographic cell parameters and XRPD study show the compounds to be isostructural. The crystal structure of 3 was determined by single crystal X-ray analysis. The complexes contained two pyzphen ligands coordinated by Zn ions. Inter- and intra-molecular interactions between aromatic fragments of pyzphen resulted in the formation of a stack structure. The triplet state energy of pyzphen in complex 2 is 22200 cm−1. Analysis of the luminescence of 1 and 3 showed a low efficiency of ligand-to-metal energy transfer.
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