Synthesis and characterization of a dysprosium complex with strong photoluminescence

Abstract

A dysprosium complex [Dy(2-pyrazinecarboxylic acid)₃(H₂O)₂] _n  · 6nH₂O (1) was prepared by hydrothermal reactions and structurally characterized by single-crystal X-ray diffraction. Complex 1 is an infinite 1-D structure with Dy³⁺ binding with six oxygens and three nitrogens to yield a distorted monocapped square antiprism. The [Dy(2-pyrazinecarboxylic acid)₃(H₂O)₂] _n and lattice water interconnect via π–π and hydrogen-bonding interactions to form a 3-D supramolecular network. Photoluminescent investigations at room temperature reveal that 1 exhibits two intensive emissions that can be ascribed to ⁴ F _9/2 → ⁶ H_J transitions (J = 15/2 and 13/2) of Dy³⁺ ions.

Keywords:

• Dysprosium
• Lanthanide
• Photoluminescence
• 2-Pyrazinecarboxylic acid

Acknowledgment

We gratefully acknowledge the financial support of the NSF of Jiangxi Province (200007GQH1685, 2008GQH0001).