A luminescent Ag₈(DPPY)₆(PhCC)₆ cluster with a triangular superatomic Ag₈ core.

Area of Science:

• Materials Science
• Nanotechnology
• Inorganic Chemistry

Background:

• Silver nanoclusters (Ag NCs) are promising for optical applications.
• Understanding the structure-property relationships of Ag NCs is crucial for their development.
• Superatomic clusters offer unique electronic and optical properties due to their discrete electronic structures.

Purpose of the Study:

• To synthesize and characterize a novel, highly stable silver nanocluster.
• To investigate the structural, electronic, and photoluminescent properties of the synthesized cluster.
• To elucidate the role of ligands in stabilizing the nanocluster and influencing its optical behavior.

Main Methods:

• Single crystal X-ray diffraction for structural determination.
• UV-Vis absorption and photoluminescence spectroscopy for optical characterization.
• Time-dependent density-functional theory (TD-DFT) calculations for theoretical analysis.

Main Results:

• Successful synthesis of Ag₈(DPPY)₆(PhC ue002C)₆ with a triangular superatomic Ag₈ core.
• Observed temperature-dependent dual emissions at 330 and 535 nm under deep UV excitation.
• TD-DFT calculations confirmed experimental findings, explaining excitation states and metal-ligand interactions.

Conclusions:

• The synthesized Ag₈ nanocluster exhibits exceptional stability and unique photoluminescence properties.
• The combined diphenyl-2-phosphinic pyridine (DPPY) and phenylacetylene (PhC ue002C) ligands play a critical role in structural integrity and electronic configuration.
• This study provides fundamental insights into the design and application of superatomic silver nanoclusters.