AI Article Synopsis
- The study focuses on creating a precise molecular tool by examining how specific bonds in certain silicon-containing molecules break when they are ionized.
- Fragmentation occurs primarily around the core-ionized silicon site, with variations influenced by the structure of the connecting bridge and the types of halogen atoms present.
- For optimal effectiveness, the separated atomic sites should be distant and connected by saturated bonds to limit electron movement, and they should have significantly different chemical environments.
Article Abstract
In an aim to create a "sharp" molecular knife, we have studied site-specific fragmentation caused by Si:2p core photoionization of bridged trihalosilyltrimethylsilyl molecules in the vapor phase. Highly site-specific bond dissociation has been found to occur around the core-ionized Si site in some of the molecules studied. The site specificity in fragmentation and the 2p binding energy difference between the two Si sites depend in similar ways on the intersite bridge and the electronegativities of the included halogen atoms. The present experimental and computational results show that for efficient "cutting" the following conditions for the two atomic sites to be separated by the knife should be satisfied. First, the sites should be located far from each other and connected by a chain of saturated bonds so that intersite electron migration can be reduced. Second, the chemical environments of the atomic sites should be as different as possible.
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| http://dx.doi.org/10.1021/jp203664r | DOI Listing |
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