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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Laser Desorption/Ionization of Trasition Metal Atoms and Oxides from Solid Argon
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Laser Desorption/Ionization of Trasition Metal Atoms and Oxides from Solid Argon

机译：固态氩的激光解吸/电离过渡金属原子和氧化物

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The oxides TiO,CrO,and CoO,formed by reaction of the laserpablated metal atoms and O_2 in excess argon during condensation at 10 K,have been laser desorbed/ionized from solid argon with 308 nm radiation for observation by TOF mass spectrometry.Mass peaks for Ti~+,Cr~+,Co~+,and particularly TiO~+ and CrO~+ and Cro~+ were enhanced by adding to the copper support a thin film of organic acid typically used as a matrix in matrix-assisted laser desorption/ionization(MALDI) mass spectrometry.Adding the C_6H_5Br chromophore to the Ar/O2 gas mixture also enhanced the etal and oxide ion signals.The laser desorption/ionization(LDI) process in these cryogenic experiments with low ionization energy subject atoms and molecules is assisted by the organic acid and bromobenzene chromophores,suggesting that charge exchange plays an important role in this process.
机译：在10 K的冷凝条件下，激光熔化的金属原子与过量氩气中的O_2反应生成的TiO，CrO和CoO氧化物已通过308 nm辐射从固体氩气中解吸/离子化，以进行TOF质谱观察。 Ti〜+，Cr〜+，Co〜+，特别是TiO〜+和CrO〜+和Cro〜+通过在铜载体上添加通常用作基质辅助激光基质的有机酸薄膜来增强在Ar / O2气体混合物中添加C_6H_5Br生色团也增强了等离子和氧化物离子信号。在这些低温实验中，具有低电离能主题原子和分子的激光解吸/电离（LDI）过程在有机酸和溴苯发色团的辅助下，表明电荷交换在该过程中起重要作用。

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