2, 6, 2′, 6′-teltracarboxy-4, 4′-bipyridine was synthesized and the luminescence enhancement of their Eu³⁺ was observed. The results indicate that the mechanism of enhancement is based on the formation of a polymeric structure where Eu³⁺ and Gd³⁺ are linked together by the ligands, which favours the consequent transfer of absorbed energy along the polymeric chain through several ligands toward the Eu³⁺.