Highly Active Multidentate Alkyne Metathesis Catalysts: Ligand‐Activity Relationship and Their Applications in Efficient Synthesis of Porphyrin‐Based Aryleneethynylene Polymers

Abstract

AbstractA series of tris(arylmethyl)ammonium‐coordinated molybdenum(VI) propylidyne catalysts was synthesized. Such N‐quarternized multidentate catalysts showed high robustness, strong resistance to small alkyne polymerization and significantly enhanced catalytic activity compared to their corresponding tris(arylmethyl)amine‐based analogues. The high activity of these new catalysts also enabled the efficient synthesis of ethynylene‐bridged porphyrin‐based arylene ethynylene polymers via alkyne metathesis, which represents a highly efficient, defect‐free, viable approach for the synthesis of this class of intriguing polymers.