Wavelength dependence of polyyne preparation by liquid-phase laser ablation using pellet targets
作者:Ryutaro Matsutani、Kohei Inoue、Noriyuki Wada、Kazuo Kojima
DOI:10.1039/c1cc00102g
日期:——
The amount of polyynes produced by Nd:YAG laser (355, 532, and 1064 nm) ablation of fullerene and graphite pellet targets was the largest for 1064 nm ablation, contrary to the powder target in the previous report. This result is believed to come from the difference in the main polyyne-production area in liquids in the optical cell, depending on the pellet and powder targets.
Silylation as a protective method for terminal alkynes in oxidative couplings
作者:R. Eastmond、T.R. Johnson、D.R.M. Walton
DOI:10.1016/0040-4020(72)80041-3
日期:1972.1
been prepared in solution by sequences involving Cu-catalysed oxidative couplings (Hay technique) of silyl-protected terminal alkynes, partial cleavage (desilylation) of the products by alkali, recoupling and complete desilylation. Thus using the conditions established in a model coupling, Et3SiCCH(I) → Et3Si(CSiEt3(II), coupling of the silyidiyne Et3Si(CC)2H(II) gives Et3Si(CC)4SiEt3(IV) which upon