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Updated: Sep 15, 2025
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Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
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A Multistimuli-Responsive Photoluminescent Au(I) Complex with a PNN-Type Ligand
Yuanyuan Hu1, Jiangyue Wang1, David James Young2
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, Jiangsu, People's Republic of China.
Inorganic Chemistry
|July 16, 2025
Summary
A new gold(I) complex, [Au3H(dppmaphen)2(CN)4], exhibits temperature-dependent phosphorescence, acting as a potential low-temperature thermometer. It also shows reversible luminescence changes and ammonia sensing capabilities.
Area of Science:
- Coordination Chemistry
- Materials Science
- Luminescence
Background:
- Gold(I) complexes are known for their diverse photophysical properties.
- PNN-type ligands offer unique coordination environments for metal ions.
- Developing novel luminescent materials with sensing capabilities is an active research area.
Purpose of the Study:
- To synthesize and characterize a novel trinuclear gold(I) complex.
- To investigate the photoluminescence properties of the synthesized complex.
- To explore the potential applications of the complex as a thermometer and sensor.
Main Methods:
- Synthesis of the trinuclear gold(I) complex [Au3H(dppmaphen)2(CN)4] (1) via reaction of AuCN with dppmaphen.
- Photoluminescence spectroscopy at various temperatures.
- X-ray diffraction studies to analyze crystal structure changes.
- Gas adsorption experiments with gaseous ammonia.
Main Results:
- The novel monoprotonated trinuclear Au(I) complex [Au3H(dppmaphen)2(CN)4] (1) was successfully synthesized.
- Compound 1 displayed temperature-dependent phosphorescence, suggesting its use as a low-temperature thermometer.
- Reversible photoluminescence (PL) changes and ammonia-induced PL quenching were observed, linked to structural modifications.
Conclusions:
- The synthesized gold(I) complex exhibits promising thermometric and sensing properties.
- The reversible luminescence changes highlight the sensitivity of the crystal structure to external stimuli.
- This study contributes to the development of functional luminescent gold materials.
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