Uso da espectrometria de massas com ionização por paper spray (PS-MS) no estudo de reações orgânicas em superfície

Abstract

Paper Spray Mass Spectrometry (PS-MS), developed by Cooks and co-workers in 2010, is one of the most novel and innovative atmospheric pressure ionization methods. This technique has been used to analyze different compounds, from drugs, foods, drinks, and also on-surface chemical reactions. Regarding the study of chemical reactions, paper spray ionization comes as an important and innovative tool that allows the study of on-surface reactions, enabling the visualization of intermediates and products in a fast and efficient way. In this work aims to study three different on-surface reactions: the alcohol oxidation catalyzed by ruthenium, that undergoes to five new products at sixty minutes, among them, the aldehyde, the carboxylic acid and the ester; the enzymatic deacetylation of peracetylated sugars catalyzed by Burkholderia cepacia lipase whose activity was evaluated after at sixty minutes, on the 1,2,3,4-tetra-O-acetyl-β-D-xylopyranose substrate; and Povarov’s multicomponent reaction, in which different intermediates and products were visualized at ten minutes, after p-bromoaniline and several aldehydes react in the presence of 2,3-dihydrofuran and formic acid. In all these on-surface reactions, PS-MS proved to be a great tool, providing fast, sensitive and consistent responses facilitating the monitoring of each reaction proposed in this work.