Journal
JOURNAL OF PHYSICAL CHEMISTRY A
Volume 113, Issue 37, Pages 9952-9957Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp905039f
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Funding
- Austrian Science Funds FWF [Z149-N16]
- Austrian Science Fund (FWF) [Z149] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [Z 149] Funding Source: researchfish
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The generation of organic particle beams is studied in combination with photoionization using UV radiation at 2, 66 nm and vacuum ultraviolet (VUV) light at 157 nm. Single-photon ionization with pulsed VUV light turns out to be sensitive enough to detect various large neutral biomolecular complexes ranging from metal-amino acid complexes to nucleotide clusters and aggregates of polypeptides. Different biomolecular clusters are shown to exhibit rather specific binding characteristics with regard to the various metals that are codesorbed in the source. We also find that the ion signal of gramicidin can be increased by a factor of 15 when the photon energy is increased from 4.66 to 7.9 eV.
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