The absolute kinetics for radical addition and electronic energy transfer to [1.1.1]propellane
作者:P F McGarry、J C Scaiano
DOI:10.1139/v98-191
日期:1998.10.1
Free radicals react more readily with [1.1.1]propellane, 1, than with styrene. For example Et3Si· reacts with 1 and styrene with rate constants of 6 × 108 M-1 s-1 and 2 × 108 M-1 s-1, respectively. Fluorenone, phenanthrene, triphenylene, benzophenone, and pyrene transfer electronic energy to 1 with rate constants well below the diffusion-controlled limit. For example, triplet benzophenone is quenched
与苯乙烯相比,自由基更容易与 [1.1.1] 丙烷反应,1。例如,Et3Si·与 1 和苯乙烯反应的速率常数分别为 6 × 108 M-1 s-1 和 2 × 108 M-1 s-1。芴酮、菲、苯并苯、二苯甲酮和芘以远低于扩散控制极限的速率常数将电子能量转移到 1。例如,三线态二苯甲酮被 1 淬灭,双分子速率常数为 9.9 × 106 M-1 s-1。发现了猝灭速率常数log kq 对供体激发态能量的线性依赖性。关键词:推进剂,激光闪光光解,自由基,三重态。