Building Large Structures with Curved Aromatic Surfaces by Complexing Metals with Phosphangulene.

Area of Science:

• Supramolecular Chemistry
• Organometallic Chemistry
• Materials Science

Background:

• Phosphangulene (1) possesses a unique conical shape and electron-rich surface, complementary to fullerenes.
• Previous research overlooked phosphangulene's potential for forming metal complexes.
• Metal complexes offer a route to large molecular structures with curved aromatic surfaces.

Purpose of the Study:

• To explore the formation and characterization of phosphangulene-metal complexes.
• To investigate the coordination behavior of phosphangulene ligands with metal ions.
• To assess the potential of these complexes in forming ordered materials with fullerenes.

Main Methods:

• Synthesis and characterization of phosphangulene derivatives.
• Preparation and structural analysis of silver(I) and copper(I) complexes with phosphangulene.
• Cocrystallization studies of phosphangulene-metal complexes with fullerenes (C60, C70).

Main Results:

• Phosphangulene ligands form exceptional metal complexes with unique coordination geometries.
• Metal centers are coordinated by concave aromatic surfaces of multiple phosphangulene ligands in divergent arrays.
• The rigid, conical structure of phosphangulene complexes leads to inefficient packing, promoting cocrystallization with fullerenes.

Conclusions:

• Phosphangulene-metal complexes exhibit unique structural features and coordination modes.
• The inherent shape of phosphangulene complexes facilitates cocrystallization with fullerenes.
• This work establishes a method for creating ordered assemblies of metals and fullerenes, paving the way for new functional materials.