Positively Charged Water Microdroplets Ionize Surrounding Gas Molecules

IF 2.7 2区 化学 Q2 BIOCHEMICAL RESEARCH METHODS
Yuanyi He, Yifan Meng and Richard N. Zare*, 
{"title":"Positively Charged Water Microdroplets Ionize Surrounding Gas Molecules","authors":"Yuanyi He,&nbsp;Yifan Meng and Richard N. Zare*,&nbsp;","doi":"10.1021/jasms.5c00178","DOIUrl":null,"url":null,"abstract":"<p >In electrospray ionization, a liquid solution is passed through a narrow capillary held at high voltage─typically +1 to +5 kV for generating positively charged microdroplets or −1 to −5 kV for negatively charged ones. It has recently been claimed that only negatively charged microdroplets can ionize surrounding gases, whereas positively charged microdroplets cannot. In contrast, we present multiple lines of evidence showing that positively charged water microdroplets are indeed capable of ionizing neutral molecules in their vicinity. Using stabilized nanoelectrospray of deionized water and high-resolution mass spectrometry, we detected ionization products of various neutral species, including oxygen, toluene, and other organic vapors. These results indicate that like their negatively charged counterparts, positively charged microdroplets can induce gas-phase ionization involving the loss of an electron from a neutral precursor, likely facilitated by the intense electric field at the microdroplet water–gas interface.</p>","PeriodicalId":672,"journal":{"name":"Journal of the American Society for Mass Spectrometry","volume":"36 9","pages":"1856–1859"},"PeriodicalIF":2.7000,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the American Society for Mass Spectrometry","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/jasms.5c00178","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMICAL RESEARCH METHODS","Score":null,"Total":0}
引用次数: 0

Abstract

In electrospray ionization, a liquid solution is passed through a narrow capillary held at high voltage─typically +1 to +5 kV for generating positively charged microdroplets or −1 to −5 kV for negatively charged ones. It has recently been claimed that only negatively charged microdroplets can ionize surrounding gases, whereas positively charged microdroplets cannot. In contrast, we present multiple lines of evidence showing that positively charged water microdroplets are indeed capable of ionizing neutral molecules in their vicinity. Using stabilized nanoelectrospray of deionized water and high-resolution mass spectrometry, we detected ionization products of various neutral species, including oxygen, toluene, and other organic vapors. These results indicate that like their negatively charged counterparts, positively charged microdroplets can induce gas-phase ionization involving the loss of an electron from a neutral precursor, likely facilitated by the intense electric field at the microdroplet water–gas interface.

Abstract Image

带正电的水微滴电离周围的气体分子。
在电喷雾电离中,液体溶液通过高压下的狭窄毛细管──产生带正电的微液滴通常为+1至+5千伏,带负电的微液滴通常为-1至-5千伏。最近有人声称,只有带负电荷的微滴才能电离周围的气体,而带正电荷的微滴则不能。相反,我们提出了多条证据,表明带正电的水微滴确实能够电离其附近的中性分子。利用稳定的去离子水纳米电喷雾和高分辨率质谱,我们检测了各种中性物质的电离产物,包括氧、甲苯和其他有机蒸汽。这些结果表明,与带负电荷的微滴一样,带正电荷的微滴可以诱导气相电离,包括从中性前驱体中损失一个电子,这可能是由微滴水气界面处的强电场促进的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
5.50
自引率
9.40%
发文量
257
审稿时长
1 months
期刊介绍: The Journal of the American Society for Mass Spectrometry presents research papers covering all aspects of mass spectrometry, incorporating coverage of fields of scientific inquiry in which mass spectrometry can play a role. Comprehensive in scope, the journal publishes papers on both fundamentals and applications of mass spectrometry. Fundamental subjects include instrumentation principles, design, and demonstration, structures and chemical properties of gas-phase ions, studies of thermodynamic properties, ion spectroscopy, chemical kinetics, mechanisms of ionization, theories of ion fragmentation, cluster ions, and potential energy surfaces. In addition to full papers, the journal offers Communications, Application Notes, and Accounts and Perspectives
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信