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Electron transfer reactivity in matrix-assisted laser desorption/ionization (MALDI): Ionization energy, electron affinity and performance of the DCTB matrix within the thermochemical framework
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UNSPECIFIED (2006) Electron transfer reactivity in matrix-assisted laser desorption/ionization (MALDI): Ionization energy, electron affinity and performance of the DCTB matrix within the thermochemical framework. JOURNAL OF PHYSICAL CHEMISTRY A, 110 (18). pp. 5967-5972. doi:10.1021/jp060568f ISSN 1089-5639.
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Official URL: http://dx.doi.org/10.1021/jp060568f
Abstract
DCTB [(H3C)(3)C-p-Ph-CH=C(CH3)-trans-CH=C(CN)(2)] has recently advanced to the most promising matrix material for matrix-assisted laser desorption/ionization (MALDI) within material sciences. However, data that would allow the evaluation of the electron-transfer reactivity within a thermochemical framework are sparse. The present study reports the first-time determination of the ionization energy (IE) of DCTB applying photoelectron (PE) spectroscopy. The experimental IE (8.54 +/- 0.05 eV) is in excellent agreement with the theoretical value of 8.47 eV, obtained by AM1 calculations. The same level of theory determines the electron affinity (EA) as 2.31 eV. Model analytes of known thermochemistry (phenanthrene [C14H10], anthracene [C14H10] and fluorofullerene [C60F46/48]) are used to bracket the electron-transfer reactivity within DCTB-MALDI. The formation of molecular ions of these analytes either is expected or is beyond the thermochemical accessibility of the DCTB matrix.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | JOURNAL OF PHYSICAL CHEMISTRY A | ||||
Publisher: | AMER CHEMICAL SOC | ||||
ISSN: | 1089-5639 | ||||
Official Date: | 11 May 2006 | ||||
Dates: |
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Volume: | 110 | ||||
Number: | 18 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 5967-5972 | ||||
DOI: | 10.1021/jp060568f | ||||
Publication Status: | Published |
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