Matrix effects in the low-temperature ozonation of ethylene, tetramethylethylene and 1-hexene
作者:U Samuni、Y Haas、R Fajgar、J Pola
DOI:10.1016/s0022-2860(98)00459-1
日期:1998.8
deposited at low temperature, and having an amorphous structure. The reaction was found to start at 26 K, the temperature at which the matrix undergoes a phase transition. In contrast, only tetramethylethylene (TME) was found to react in an argon matrix, the other two compounds remaining inactive towards ozone up to the softening temperature of argon (∼40 K). These results are interpreted as indicating
摘要 在氩气和 CO2 基质中在低温 (12–80 K) 下研究了标题化合物的臭氧化作用。发现所有三种都与低温沉积的 CO2 基质中的臭氧反应,并具有无定形结构。发现反应开始于 26 K,即基质发生相变的温度。相比之下,只有四甲基乙烯 (TME) 被发现在氩气基质中反应,其他两种化合物在氩气软化温度 (~40 K) 之前对臭氧保持惰性。这些结果被解释为表明一旦两种反应物自由移动到所需的配置,烯烃和臭氧之间的反应就会在低温下引发。这个想法得到了 TME 反应的分子动力学模拟的支持。TME初级臭氧化物的红外光谱,