Surface modification and laser pulse length effects on internal energy transfer in DIOS

Article Abstract:

Benzyl-substituted benzylpyridinium (BP) chloride salts were used as a source of thermometer ions to probe the internal energy (IE) transfer in desorption/ionization on porous silicon (DIOS). Most of the differences between matrix-assisted layer desorption/ionization (MALDI) and DIOS described are compatible with the different dimensionality of the plume expansion and the differences in the activation energy of desorption due to surface modifications.

All Other Basic Inorganic Chemical Manufacturing, Silicon & Inorganic Compounds, Porous materials, Silicon compounds, Atomic properties, Energy transformation

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Molecular dynamics of matrix-assisted laser desorption of leucine enkephalin guest molecules from nicotinic acid host crystal

Article Abstract:

A study was conducted to analyze molecular dynamics of matrix-assisted laser desorption of leucine enkephalin guest molecules from nicotinic acid host crystal. The CHARM c24b2 code was utilized to carry out the molecular dynamics computations. In addition, some features of the crystal structure and thermal features of nicotinic acid were determined to confirm the validity of the interaction potentials.

Research, Crystals, Molecular dynamics, Leucine, Enkephalinase, Enkephalins, Niacin

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Effect of [beta]-cyclodextrin charge type on the molecular recognition thermodynamics of reactions with (ferrocenylmethyl)dimethylaminium derivatives

Article Abstract:

The molecular selectivity of native [beta]-cyclodextrin for charged guests which could be efficiently attenuated by introducing differently charged substituents is reported. The ionization of host CDs affects both enthalpic and entropic changes of host-guest complexations by changing the hydrophobicity and the desolvation effect of hosts upon inclusion complexation.

Thermal properties, Cyclodextrins, Enthalpy, Structure, Hydrophobic effect

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