Identification of a neutral loss from precursor ions with nearly Gaussian-shaped isotopic patterns via inverted isotopic patterns of product ions.

Identification of a neutral loss from precursor ions with nearly Gaussian-shaped isotopic patterns via inverted isotopic patterns of product ions.
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通过产物离子的反转同位素模式识别具有近高斯形同位素模式的前体离子的中性损失

DOI:
10.1002/rcm.7522
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发表时间:
2016
期刊:
Rapid communications in mass spectrometry : RCM
影响因子:
--
通讯作者:
M. Finze
M. Finze
中科院分区:
--
文献类型:
--
作者:
J. Warneke;T. Dülcks;D. Kemken;M. Finze

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直接测定具有非常宽的高斯形同位素模式的离子的原子组成具有挑战性,因为没有单一同位素峰可用于高精度质量测定,并且同位素模式中没有可见的特征形状。(一个标称质量)在宽的高斯形同位素模式的中心,导致具有产物离子信号的质谱显示反转的完整同位素分布。结果我们介绍了一种方便的方法,用于快速和直接识别具有广泛同位素模式的分子离子的中性损失。这种方法的理论考虑进行了解释,并考虑其实际局限性。这种方法的好处是通过引导读者通过分析的复杂混合物的桥接carborate集群,化合物具有非常广泛的同位素patterns.ConclusionsThe所提出的方法可以有效地用于测定原子组成的化合物具有广泛的同位素模式,通过他们的碎片使用质谱。这种方法应大大促进质谱分析的化合物含有几个原子与广泛的同位素分布,如锗,锡,钼,钌和汞,因此,可以大大拓宽使用质谱作为分析方法在无机和有机金属化学。版权所有© 2016约翰威利父子有限公司.
RationaleDirect atomic composition determination of ions with very broad Gaussian‐shaped isotopic patterns is challenging because no monoisotopic peak is available for high accurate mass determination and no characteristic shapes in isotopic patterns are visible.MethodsIsolation and fragmentation of the ions corresponding to one peak (one nominal mass) in the center of the broad Gaussian‐shaped isotopic pattern lead to a mass spectrum with the product ion signal showing the inverted full isotopic profile of the neutral fragment.ResultsWe have introduced a convenient method for the fast and straightforward identification of a neutral loss for molecular ions with broad isotopic patterns. The theoretical considerations underlying this method are explained and its practical limitations are considered. The benefits of this method are exemplified by guiding a reader through the analysis of a complex mixture of bridged carborate clusters, compounds with very broad isotopic patterns.ConclusionsThe presented method can be efficiently used for the determination of atomic compositions of compounds with broad isotopic patterns by their fragmentation using mass spectrometry. This method should significantly facilitate the mass spectrometric analysis of compounds containing several atoms with broad isotopic distributions, such as Ge, Sn, Mo, Ru and Hg, and, thus, can considerably broaden the use of mass spectrometry as an analytical method in inorganic and organometallic chemistry. Copyright © 2016 John Wiley & Sons, Ltd.
Carba-closo-dodecboranyl 配体的汞 (II) 配合物 [closo-1-CB11X11]2â (X = H、F、Cl、Br、I)
DOI: 10.1021/om201023h
发表时间: 2012
期刊: Organometallics
影响因子: 2.8
作者:
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含有多同位素元素的离子的碰撞激活质谱
DOI: --
发表时间: 1982
期刊:
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作者:
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DOI: 10.1021/om5009956
发表时间: 2015-01
期刊: Organometallics
影响因子: 2.8
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DOI: --
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作者:
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DOI: 10.1021/ac00118a022
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影响因子: 7.4
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METZGER, K;REHBERGER, PA;LEHMANN, WD
通讯作者: LEHMANN, WD