Gold Nanoclusters Whose Photoluminescent Properties are Dynamically Tunable by Modulating the Assembly Pathway...

Area of Science:

• Materials Science
• Nanotechnology
• Photochemistry

Background:

• Optimizing optical materials requires modulating assembly pathways.
• Metal nanoclusters present challenges due to limited functionalization and complex emission mechanisms.

Purpose of the Study:

• To investigate the self-assembly pathway of 4,6-diamino-2-pyrimidinethiol modified gold nanoclusters (DPT-AuNCs).
• To understand how assembly influences luminescent properties and enables alcohol sensing.

Main Methods:

• Kinetic studies of DPT-AuNCs in methanol/water mixtures.
• Photoluminescence (PL) and infrared (IR) spectroscopy.
• Analysis of aggregation structure transformation and solvent effects.

Main Results:

• DPT-AuNCs self-assemble into non-luminescent nanofibers and luminescent microflowers.
• Inter-cluster hydrogen bonding and C-H⋅⋅⋅π interactions enhance luminescence.
• DPT-AuNCs differentiate alcohols, including n-propanol and isopropanol, based on photoluminescent properties.

Conclusions:

• Controlling nanocluster assembly pathways is key to enhancing luminescent performance.
• DPT-AuNCs offer a promising platform for optical sensing applications.
• Understanding assembly mechanisms advances nanocluster material design.