Highly luminescent lanthanide complexes constructed by Bis-tridentate ligand and as sensor for Et2O

Abstract

We report the synthesis of mono-nuclear lanthanide complexes [Ln(tppz)(acac)(NO3)2]·acac (tppz = 2,3,5,6-tetra-2-pyridinylpyrazine; acac = acetylacetone; Ln3+ = Tb3+, 1a; Er3+, 1b; Y3+, 1c), by introducing the bis-tridentate ligand tppz for the first time. These complexes are fully characterized and luminescence properties are investigated in detail. It is interesting to find that 1a has highly luminescent quantum yield of 69%. Further investigation reveals 1a is a sensitive probe to detect Et2O.