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首页> 外文期刊>Journal of mass spectrometry: JMS >Stability of high-mass molecular libraries: the role of the oligoporphyrin core
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Stability of high-mass molecular libraries: the role of the oligoporphyrin core

机译：高质量分子文库的稳定性：寡卟啉核心的作用

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摘要

Molecular beam techniques are a key to many experiments in physical chemistry and quantum optics. In particular, advanced matter-wave experiments with high-mass molecules profit from the availability of slow, neutral and mass-selected molecular beams that are sufficiently stable to remain intact during laser heating and photoionization mass spectrometry. We present experiments on the photostability with molecular libraries of tailored oligoporphyrins with masses up to 25000Da. We compare two fluoroalkylsulfanyl-functionalized libraries based on two different molecular cores that offer the same number of anchor points for functionalization but differ in their geometry and electronic properties. A pentaporphyrin core stabilizes a library of chemically well-defined molecules with more than 1600 atoms. They can be neutrally desorbed with velocities as low as 20m/s and efficiently analyzed in photoionization mass spectrometry. Copyright (c) 2015 John Wiley & Sons, Ltd.
机译：分子束技术是物理化学和量子光学中许多实验的关键。特别是，对高质量分子的先进物质波实验得益于慢速，中性和质量选择的分子束的可用性，这些分子束足够稳定，可以在激光加热和光电离质谱法中保持完整。我们提出了量身定制的寡卟啉分子库的光稳定性实验，质量高达25000Da。我们比较了基于两个不同分子核的两个氟代烷基硫烷基官能化的文库，它们提供了相同数量的锚定点进行官能化，但是它们的几何形状和电子特性不同。五卟啉核心可稳定化学定义明确的分子库，其中包含1600多个原子。它们可以以低至20m / s的速度中和解吸，并可以在光电离质谱法中进行有效分析。版权所有（c）2015 John Wiley＆Sons，Ltd.

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