Preparation of polyynes by liquid-phase laser ablation using different irradiation target materials and solvents

Polyynes were prepared from pellets of a perylene derivative, 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA), and graphite by liquid-phase laser ablation, using solvents of methanol, ethanol, 1-propanol, 1-butanol, t-butyl alcohol, n-hexane, and decalin. The amounts of polyynes produced from PTCDA strongly depended on the polarity of the solvent, while those from graphite did not. Polar functional groups of acid-anhydride side chains in PTCDA are believed to influence the amounts of C2 radicals produced by laser ablation. The long-chain polyyne C28H2 was detected in a chromatogram of a solution obtained from a graphite pellet and solvent decalin.

The amounts of polyynes produced from 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) with polar functional groups of acid-anhydride side chains, strongly depended on the polarity of the solvent. In addition, the long-chain polyyne C28H2 was detected in a chromatogram of a solution obtained from a graphite pellet and solvent decalin.Figure optionsDownload as PowerPoint slideResearch highlights
► Polyynes were prepared by liquid-phase laser ablation.
► The solvent effect was different between 3,4,9,10-perylene tetracarboxylic dianhydride and graphite.
► Long-chain polyyne C28H2 was detected in a chromatogram.