The Analysis of the Interactions and Complexation of Polycyclic Aromatic Hydrocarbons and Cyclodextrin Using Electrospray Ionization Mass Spectrometry

摘要

The spectra demonstrate that both beta and gamma-cyclodextrin are noncovalently complexing with naphthalene, and the complex is able to be transferred into the gaseous phase. Potential pyrene dimerization has been detected in figure 5A. This is of significant because when the fragment of four pyrene rings is contained in the structure of another polycycle it is possible that the dimerization also occurs. The naptho derivatives of pyrene are also involved in the dimerization. It is possible that naphthalene is undergoing a form of dimerization as well, which could alter the binding affinity of the PAH and allow it to accept more then 1 hydrogen in positive mode. Further analysis is required to a) control dimerization, and b) determine the correct stoichiometry to improve the resolution of the complex.