Preparation of long-chain polyynes C_(18)H2 and C_(20)H2 by laser ablation of pellets of graphite and perylene derivative in liquid phase

摘要

Polyynes, liner carbon chain compounds with sp hybridization orbital, are known to exist as interstellar materials. The typical one-dimensional electronic structure of polyyne has attracted considerable attention in its band gap and nonlinear optical properties . Raman spectra of polyynes with different lengths of carbon chains have been measured . Polyyne molecules inserted inside a carbon nanotube and a solid silver nanoparticle assembly have been studied. The organic synthesis of polyynes by oxidative coupling of ethynyl complexes has first been attempted by Glaser in the second half of the 1800s and later used by Baeyer.