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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 theThermochemical Framework
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| - DCTB [(H3C)3C-p-Ph-CHC(CH3)-trans-CHC(CN)2] has recently advanced to the most promising matrixmaterial for matrix-assisted laser desorption/ionization (MALDI) within material sciences. However, datathat would allow the evaluation of the electron-transfer reactivity within a thermochemical framework aresparse. The present study reports the first-time determination of the ionization energy (IE) of DCTB applyingphotoelectron (PE) spectroscopy. The experimental IE (8.54 ± 0.05 eV) is in excellent agreement with thetheoretical value of 8.47 eV, obtained by AM1 calculations. The same level of theory determines the electronaffinity (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 thermochemicalaccessibility of the DCTB matrix.
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