Dissociative Photoionization of Quinoline and Isoquinoline

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Dissociative Photoionization of 1,3-Dioxolane

1,3-Dioxolane (C2H6O2) is a small cyclic organic molecule that contains more than 40% oxygen by mass. Due to its high oxygen content 1,3-dioxolane and its derivatives are promising alternative fuel components and fuel additives. Besides fuel development, uses of 1,3-dioxolane can be found in organic synthesis and polymer chemistry as well. In spite of its various applications and potential use in alternative fuels, accurate data on the dissociative photoionization and energetics of 1,3-dioxolane is not available in recent literature. Relevant publications date back to more than forty years ago and only propose possible mechanisms for the dissociation process, without providing any proof or further insight

Dissociative Photoionization of 1,3-Dioxolane

1,3-Dioxolane (C2H6O2) is a small cyclic organic molecule that contains more than 40% oxygen by mass. Due to its high oxygen content 1,3-dioxolane and its derivatives are promising alternative fuel components and fuel additives. Besides fuel development, uses of 1,3-dioxolane can be found in organic synthesis and polymer chemistry as well. In spite of its various applications and potential use in alternative fuels, accurate data on the dissociative photoionization and energetics of 1,3-dioxolane is not available in recent literature. Relevant publications date back to more than forty years ago and only propose possible mechanisms for the dissociation process, without providing any proof or further insight

Fragmentation of Energy Selected CFC-1X ions

Diethyl ether (DEE) is a common, organic molecule widely used as a solvent, engine starting fluid, and as an octane and oxygen enhancer in internal combustion engines. DEE has also been known to become unstable and spontaneously form peroxides in air, which makes the oxidation mechanism of DEE of interest. Thermochemical input parameters have been shown to be a major source of uncertainty in combustion models, spurring us to revisit the dissociative photoionization to confirm or revise the enthalpies of formation

Coherent Oscillatory Femtosecond Dynamics in Multichannel Photodynamics of NO2 Studied by Spatially Masked Electron Imaging

400 fs) a second slow (near 0 eV) photoelectron channel is observed that is associated with one photon excitation at 400 nm to the first excited (A) over bar B-2(2) state NO2 followed by two photon excitation at 266 nm leading to near threshould tomization and dissociation to NO- + O(P-3). Distinctive oscillatory patterns were found in the pump-probe transients of the photoelectron yield for both the slow and the fast photoelectron channels but with different periods of about 750 fs (slow) ro 590 fs (fast) Extensive polarization experiments are reported for both linerar and circular polarized pump and probe laser geometries. We discuss the oscillatory mechanism in relation to ab initio calculations of relevant Rydberg and valence type excited states of NO2 near 9.3 eV. We propose that an oscillating wavepacked of mixed Rydberg and valence character that predissociates is reponsible for the observed osicillations in the transients of the fast (0.88 eV) photoelectron channel