Soft deposition of organic macromolecules with fast atom bombardment mass spectrometry

摘要

In order to investigate the requirements for soft deposition of intact positively charged organic macromolecules, an homogenous series of modal compounds such as polyphenylene dendronized perylenes (PDPs), C80H52, C200H132 and C320H212 and a series of derivatives involving perylene derivative, C98H104N8O4, terrylene derivative, C78H82N6O4 and quaterrylene derivative, C140H138N10O8, were used for soft-landing experiments on a metallic or matrix coated surface using fast atom bombardment mass spectrometry. Soft-landing can be achieved at impact energies below 180 eV with no production of fragments. The deposition rate shows strong energy dependence with similar behavior of the different organic compounds. A single isotope of the molecule was selected and soft-landed at increased resolution.