X-ray induced fragmentation of size-selected salt cluster-ions stored in an ion trap

Mauritz J Ryding,Catalin Miron,Knut J Børve,Einar Uggerud,Grazieli Simões,Tuija Jokinen,Klavs Hansen,Johannes Niskanen,Glenn B S Miller,Alexandre Giuliani,Olle Björneholm,Egill Antonsson,Minna Patanen

doi:10.1039/c4ra09787d

Abstract

A method combining X-ray synchrotron radiation and mass spectrometry is presented. Ammonium bisulphate cluster ions in an ion trap exhibit well-defined core-level absorption edges in the fragment-ion abundance spectra.

Highlights

Gas-phase clusters constitute the logical bridge between the gaseous and condensed phases, and the study of cluster properties as a function of size provides fundamental insight of importance to chemistry and physics.[1]
For each single measurement point the cluster ions are trapped for a period of 600 ms, which in comparison with Fig. 4 is short, indicating that the collisional induced dissociation (CID) should be most important for À1AS, but that some À2AS should be observed
Based on our experimental results and the theoretical considerations presented above a clear picture concerning the X-ray induced fragmentation of small cluster-ions has emerged, with the following characteristics: (i) Resonant X-ray induced dissociation (RXID)—the process of primary interest in this context—is observed to take place, as is evident from the spectra reconstructed from the photon energy dependent variation in the abundances of fragment ions

Summary

Introduction

Gas-phase clusters constitute the logical bridge between the gaseous and condensed phases, and the study of cluster properties as a function of size provides fundamental insight of importance to chemistry and physics.[1]. Size selected A+(AS)[6] clusters were stored in the mass spectrometer ion-trap and exposed to X-rays for 550 ms, a er which the resulting fragments and remaining parent ions were detected (please refer to the section Experimental methods for details).

Results

Conclusion