GAS-PHASE ELECTRON-TRANSFER REACTIONS FROM MULTIPLY-CHARGED ANIONS TO RARE-GAS CATIONS
GAS-PHASE ELECTRON-TRANSFER REACTIONS FROM MULTIPLY-CHARGED ANIONS TO RARE-GAS CATIONS
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DOI：
10.1021/ja00151a021
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发表时间：
1995-11-22
影响因子：
15
通讯作者：
MCLUCKEY, SA
中科院分区：
文献类型：
--
作者：
HERRON, WJ;GOERINGER, DE;MCLUCKEY, SA
在四极离子陷阱中，电喷雾产生的多电荷阴离子与单电荷的Ar、氪和氙阳离子发生反应。由磺化偶氮染料形成的双电荷阴离子和由聚腺苷酸酯5‘-d(AAA)-3’，5‘-d(AAAA)-3’和5‘-d(AAAAA)-3’形成的最高负电荷态作为阴离子反应物。在每一种情况下，都观察到阴离子产物的广泛碎裂，推测它是一种自由基阴离子。将观察到的离子/离子反应产生的分解产物与电喷雾直接形成的相同电荷态的偶电子物种碰撞激活形成的产物阴离子进行比较，显示出显著的差异。虽然偶电子和奇电子物种都有一些共同的碎裂途径，但奇电子物种表现出一个或多个额外的分解通道。此外，在聚腺苷阴离子的情况下，离子/离子反应显示出来自产生序列信息的主要解离通道的贡献比相应偶电子阴离子的碰撞激活更接近相同。
Multiply-charged anions derived from electrospray have been subjected to reactions with singly-charged cations of argon, krypton, and xenon in a quadrupole ion trap. The doubly-charged anion formed from a sulfonated azo dye and the highest negative charge states formed from the polyadenylates 5'-d(AAA)-3', 5'-d(AAAA)-3', and 5'-d(AAAAA)-3' sen ed as the anionic reactants. In each case, extensive fragmentation of the anionic product, which presumably is a radical anion, was observed. Comparison of the observed decomposition products arising from ion/ion reactions with product anions formed via collisional activation of the even-electron species of the same charge state, as formed directly by electrospray, shows significant differences. While both the even-electron and odd-electron species hold some fragmentation pathways in common, the odd-electron species show one or more additional decomposition channels. Furthermore, in the case of the polyadenylate anions, the ion/ion reactions showed more nearly equal contributions from the major dissociation channels that yield sequence information than did collisional activation of the corresponding even-electron anions.