Novel concentration-driven structural interconversion in shape-specific solids supported by the octahedral...

Area of Science:

• Inorganic Chemistry
• Materials Science
• Coordination Chemistry

Background:

• Rhenium-selenium clusters offer unique structural and electronic properties for advanced materials.
• Ditopic ligands with specific geometries are crucial for constructing well-defined coordination polymers.
• Cadmium ions are versatile building blocks in coordination chemistry, enabling diverse network structures.

Purpose of the Study:

• To synthesize and characterize novel coordination polymers utilizing a rhenium-selenium cluster as a ditopic ligand.
• To investigate the influence of cadmium ion concentration on the resulting coordination polymer structures.
• To explore the potential for structural interconversion between different coordination polymer phases.

Main Methods:

• Synthesis of the rhenium-selenium cluster complex, cis-[Re(6)(μ3-Se)(8)(PPh3)4(4,4'-dipyridyl)2](SbF6)2.
• Coordination of the cluster complex with cadmium(II) ions under varying conditions.
• Characterization of the resulting coordination polymers using X-ray diffraction and other analytical techniques.

Main Results:

• Two distinct coordination polymers, compounds 2 and 3, were successfully synthesized.
• The formation of each polymer is selectively controlled by the relative concentration of cadmium(II) ions.
• Experimental evidence demonstrates the conversion of the first isolated structure (2) into the second (3).

Conclusions:

• The study highlights the successful integration of a unique rhenium-selenium cluster into coordination polymers.
• Cadmium ion concentration is identified as a critical factor in directing the self-assembly of these complex structures.
• The demonstrated structural interconversion offers insights into the dynamic nature of coordination polymer formation.