3353-12-6Relevant academic research and scientific papers
Characterization of the combustion products of polyethylene
Piao, Mingjun,Chu, Shaogang,Zheng, Minghui,Xu, Xiaobai
, p. 1497 - 1512 (2007/10/03)
Polyethylene (PE) was burned in a tube-type furnace with an air flow at a temperature of 600~900°C. Combustion products were collected with glass wool, glass fiber filter, and XAD-2 adsorbent. The analysis of the products was performed with GC-FID and GC-MSD. At low temperature, hydrocarbons were the major components, while at higher temperature the products were composed of polycyclic aromatic hydrocarbons. With the high performance of the Hewlett-Packard 6890GC-5973MSD, more compounds were identified in comparison with previous studies.
Convenient synthesis of cyclopentapyrene and 3,4-dihydrocyclopentapyrene. The reactivity of the pyrene dianion
Tintel, C.,Cornelisse, J.,Lugtenburg, J.
, p. 14 - 20 (2007/10/02)
The reactivity of the pyrene dianion has been investigated.Initial attack by electrophiles on the pyrene dianion has been shown to take place exclusively at the 4(9)-position, leading to monoanions (11,15) which can be converted into 9-substituted 1,9-dihydropyrene derivatives (12,16).The latter can be rearranged to give the novel 4-substituted 4,5-dihydropyrene derivatives (13,17), which provide access to 4-substituted pyrene derivatives (14,5).Cyclopentapyrene (1) and 3,4-dihydrocyclopentapyrene (2), two widespread environmental contaminants, have been synthesizedfrom pyrene in four (64percent) and in five (62percent), respectiveliy, utilizing the chemical properties of the pyrene dianion.In these easy and straightforward syntheses the thus far unknown 4,5-dihydro-4-pyreneacetic acid (17) plays a major role.
