Luminescent heterohexanuclear complexes with platinum alkynyl and silver diphosphine as components

Area of Science:

• Coordination Chemistry
• Materials Science
• Photophysics

Background:

• Metal-containing compounds with extended pi-systems are crucial for optoelectronic applications.
• Platinum and silver complexes are known for their unique photoluminescent properties.
• Acetylide ligands facilitate the construction of conjugated metal-organic frameworks.

Purpose of the Study:

• To synthesize novel heteronuclear platinum-silver complexes.
• To investigate the influence of bridging ligands on the nuclearity and structure of the resulting complexes.
• To explore the luminescent properties of these new compounds.

Main Methods:

• Reaction of [Ag2(mu-Ph2PXPPh2)2(MeCN)2]2+ with [Pt(C[triple bond]CC6H4R-p)4]2- (R = H, CH3).
• Structural characterization of the synthesized complexes using X-ray diffraction and spectroscopy.
• Photoluminescence spectroscopy to determine emission properties.

Main Results:

• Synthesis of strongly luminescent neutral heterohexanuclear complexes Pt2Ag4(mu-Ph2PNPPh2)4(C[triple bond]CC6H4R-p)4 (R = H, 1; CH3, 2) when X = NH.
• Formation of a heterotrinuclear complex cation [PtAg2(mu-PPh2CH2PPh2)2(C[triple bond]CC6H5)2(CH3CN)2]2+ (3(2+)) when X = CH2.
• The bridging ligand dictates the nuclearity and assembly of the platinum-silver complexes.

Conclusions:

• The choice of the bridging ligand (NH vs. CH2) is critical in controlling the self-assembly of platinum-silver acetylide complexes.
• The synthesized heterohexanuclear complexes exhibit strong luminescence, suggesting potential applications in materials science.
• This study provides insights into the structure-property relationships in heterometallic acetylide compounds.