Crystal structure and photoluminescent properties of a new EuIII–phthalate–acetate coordination polymer

Abstract

A new coordination polymer, poly[(acetato)aqua(μ3-phthalato)europium(III)], [Eu(C8H4O4)(CH3O2)(H2O)]n or [EuIII(phth)(OAc)(H2O)] (phth2− = phthalate and OAc− = acetate) was synthesized and characterized, revealing it to be a supramolecular assembly of one-dimensional [EuIII(phth)(OAc)(H2O)] chains. Each chain is built up of edge-sharing distorted tricapped trigonal–prismatic TPRS-{EuIIIO9} building motifs and assembled in a regular fashion through hydrogen-bonding and aromatic π–π interactions. The fully deprotonated phth2− ligand was shown to be an effective sensitizer, promoting the characteristic 5D0→7FJ (J = 1–4) emissions of EuIII even in the presence of the non-sensitizing OAc− group.

Keywords

• coordination polymer
• lanthanide
• phthalate
• acetate
• crystal structure
• photoluminescence