Photoluminescence Spectroscopy of Mass-Selected Electrosprayed Ions Embedded in Cryogenic Rare-Gas Matrixes
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- 作者：Bastian Kern ; Jean-Fran莽ois Greisch ; Dmitry Strelnikov ; Patrick Weis ; Artur B枚ttcher ; Mario Ruben ; Bernhard Sch盲fer ; Detlef Schooss ; Manfred M. Kappes
- 刊名：Analytical Chemistry
- 出版年：2015
- 出版时间：December 1, 2015
- 年：2015
- 卷：87
- 期：23
- 页码：11901-11906
- 全文大小：305K
- ISSN：1520-6882
文摘
An apparatus is presented which combines nanoelectrospray ionization for isolation of large molecular ions from solution, mass-to-charge ratio selection in gas-phase, low-energy-ion-beam deposition into a (co-condensed) inert gas matrix and UV laser-induced visible-region photoluminescence (PL) of the matrix isolated ions. Performance is tested by depositing three different types of lanthanoid diketonate cations including also a dissociation product species not directly accessible by chemical synthesis. For these strongly photoluminescent ions, accumulation of some femto- to picomoles in a neon matrix (over a time scale of tens of minutes to several hours) is sufficient to obtain well-resolved dispersed emission spectra. We have ruled out contributions to these spectra due to charge neutralization or fragmentation during deposition by also acquiring photoluminescence spectra of the same ionic species in the gas phase.