Molecular Dysprosium Complexes for White-Light and Near-Infrared Emission Controlled by the Coordination Environment

TL;DR

This study investigates dysprosium complexes with different ligands to control their white-light and near-infrared emission, highlighting how ligand environment influences emission efficiency and color.

Contribution

It introduces a new approach using auxiliary triphenylphosphine oxide ligands to enhance Dy 3+ emission in single-molecule complexes.

Findings

Auxiliary tppo ligand increases Dy 3+ emission intensity.

Ligand environment significantly affects emission color and efficiency.

Water-containing and water-free complexes show different emission behaviors.

Abstract

A series of single-molecule dysprosium (Dy 3+) complexes consisting of b diketonate ligands, as water-containing complexes, and the auxiliary triphenylphosphine oxide (tppo)ligand as water free complexes were investigated as potential white light emitters. The coordination environment and choice of the ligands play an important role in the behavior of the yellow and blue emission of the Dy 3+ complexes based on the sensitization efficiency of the Dy 3+ ion by the ligands. By introducing the auxiliary tppo ligand in the complex, the relative intensity of the Dy 3+ emission increases due to a more efficient sensitization of the Dy 3+ ion.