Luminescent Lanthanide Coordination Zippers with Dense-Packed Structures for High Energy Transfer Efficiencies

Abstract

Novel Eu(III) coordination polymers [Eu(hfa)3(dpt)] n [dpt: 2,5-bis(diphenylphosphoryl)thiophene] and [Eu(hfa)3(dpedot)] n [dpedot: 3,4-bis(diphenylphosphoryl)ethylenedioxythiophene] were designed for dense structures with high energy transfer efficiency. The zig-zag orientation of single polymer chains induced the formation of dense-packed coordination structures with multiple inter-molecular hydrogen bonds. These polymers exhibited high intrinsic emission quantum yields (~80%) due to their asymmetrical and low-vibrational coordination structures. The significant energy transfer efficiencies of up to 80% were also achieved.