Synthesis, crystal structure and luminescent properties of two complexes containing [Au(CN)₂]⁻ building blocks

Abstract

Two supramolecular complexes, {{Ni(H₂O)(phen)₂[Au(CN)₂]}[Au(CN)₂] · 1.5H₂O} _n (1) (phen = 1,10-phenanthroline) and [H₂teta][Au₂(CN)₄] · 2H₂O (2) (teta = 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetra-azacyocloteradeca-4,11-diene) have been synthesized and structurally characterized. Complex 1 was a one-dimensional infinite chain constructed by [Au(CN)₂]⁻ building blocks. In complex 2, there are one cation, one anion, and two water molecules in the asymmetric unit. The two complexes are interconnected through a combination of aurophilic attractions and hydrogen bonds and formed into 3D supramolecular structures. The aqueous solutions of 1 and 2 display interesting luminescence at room temperature.

Keywords:

• Crystal structure
• Aurophilic attractions
• Luminescence

Acknowledgement

This work is supported by the National Science Foundation of China (Nos 20071020 and 20371027) and Tianjin Natural Science Foundation (No. 033609211).