Polyynes are a one-dimensional conjugated systems that have potential applications in understanding of the properties of carbynes or as precursors of graphitic ribbons. These compounds serve as precursors for polydiacetylenes (PDA) which are a series of rich carbon conducting polymers discovered by Gerhard Wegner with potential use in high-resolution photoresist, all-optical switches and optical limiters. However, the polymerization of the polyynes to obtain the PDA is a challenging process, considering it needs a specific repeated distance between carbons in two different monomers and a specific angle to complete the polymerization. Joseph Lauuher and Frank Fowler had guide us to overcome this by forming co-crystals of the diyne’s using different bis(pyridyl) oxalamides as host molecules, in order to get the repeated distance and the correct angle between the monomers to form the PDA. This method takes advantage of the halogen bonding that can be observed between the pyridyl groups and any halogen connected to our monomer. During this project, we attempt to produce the PDA’s by forming co-crystals from the monomer 1,4-bis(4-bromophenyl)buta-1,3-diyne using different host molecules. The result for this project will be elaborated and presented.

Co-crystallization experiments for the topochemical polymerization of 1,4-bis(4-bromophenyl)buta-1,3-diyne

251st National Meeting (2016)

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