Department of Chemistry, Purdue University, 47907-1393, West Lafayette, IN, USA.
J Am Soc Mass Spectrom. 1993 Dec;4(12):938-42. doi: 10.1016/1044-0305(93)80019-U.
Collisions of atomic and molecular ions (I(+), Xe(+); CH3I(+), I 2 (+) ) with self-assembled fluoroalkyl-monolayer surfaces result in reactions involving the net transfer of fluorine atoms or fluorocarbon radicals from the surface to the projectile ions. The scattered products, which include unusual ionic species such as IF(+), IF 2 (+) CFI(+); CF2I(+), I2F(+), and XeF(+), are generated in endothermic ion-surface reactions. These reactions are not observed when the collision partner is a gas-phase (rather than a surface-bound) perfluoroalkane. Evidence is presented which suggests that in some cases molecular projectiles undergo surface-induced dissociation to yield atomic species which subsequently react with the surface. Fluorine abstraction is favored for projectiles containing highly polarizable elements.
原子和分子离子（I(+)，Xe(+)；CH3I(+)，I2 (+)）与自组装氟烷基单层表面的碰撞导致涉及从表面向射弹离子净转移氟原子或氟碳自由基的反应。散射产物包括不寻常的离子物种，如 IF(+)、IF2 (+)、CFI(+)；CF2I(+)、I2F(+)和 XeF(+)，它们是在吸热的离子-表面反应中生成的。当碰撞伙伴是气相（而不是表面结合的）全氟烷烃时，不会观察到这些反应。有证据表明，在某些情况下，分子射弹经历表面诱导的离解以产生随后与表面反应的原子物种。对于含有高极化率元素的射弹，优先进行氟原子的提取。
