Insights into molecular cluster materials with adamantane-like core structures by considering dimer interactions

Area of Science:

• Materials Science
• Chemistry
• Physics

Background:

• Adamantane-like molecular materials exhibit extreme non-linear optical (NLO) responses and broad white-light emission.
• Both molecular structure and macroscopic arrangement influence NLO properties.

Purpose of the Study:

• To systematically study cluster dimers of AdR4 and [(RT)4S6] (T=Si, Ge, Sn; R=methyl, phenyl, 1-naphthyl).
• To gain fundamental knowledge about intermolecular interactions in these materials.

Main Methods:

• Computational study of cluster dimers, trimers, and tetramers.
• Analysis of energetically favorable configurations, binding energies, and energy barriers.

Main Results:

• Staggered dimer structures with substituents are energetically most favorable.
• Binding energy increases with core and substituent size.
• Cluster interactions are substituent-substituent or core-core dominated.
• Lower energy barriers for substituent rotation compared to dimer rotation.

Conclusions:

• Understanding cluster dimer interactions provides insights into bulk material properties.
• Interactions are tunable by varying core and substituent size.
• Substituent rotation is a key factor in forming different material conformers.