Dendrimer Disassembly in the Gas Phase: A Cascade Fragmentation Reaction of Fréchet Dendrons
作者:Bilge Baytekin、H. Tarik Baytekin、Uwe Hahn、Werner Reckien、Barbara Kirchner、Christoph A. Schalley
DOI:10.1002/chem.200900403
日期:2009.7.20
experiments, a fragmentation cascade begins with the dissociation of the focal amine. The focal benzyl cation quickly decomposes in a fragmentation cascade from the focal point to the periphery until the peripheral benzyl (or naphthylmethyl) cations are formed. Five different mechanisms are discussed in detail, three of which can be excluded based on experimental evidence. The cascade fragmentation is reminiscent
据报道,Fréchet型树突的质谱表征。为了提供电喷雾电离所需的电荷,可以使在焦点处带有OH基团的树突去质子化并在负离子模式下观察到。可替代地,可以将相应的溴化物转化为季铵离子,该季铵离子可以以正模式容易地被检测到。如果后面的离子经过碰撞诱导的解离实验,则碎片级联反应将从焦点胺的解离开始。局限性苄基阳离子在片段级联中迅速从焦点到外围分解,直到形成外围的苄基(或萘甲基)阳离子。详细讨论了五种不同的机制,根据实验证据可以排除其中三种。