Ultra-soft Desorption Assisted Mass Spectrometry using Picosecond Infrared Laser for the Detection of lons in the Liquid Surface  

液体表面离子的皮秒红外激光超软解吸辅助质谱方法

作　　者：Ziyuan Li Yue Wang Tiantian Tong Ziwei Chen Shan Xi Tian 李子渊;王越;童田田;陈子伟;田善喜(中国科学技术大学化学物理系,合肥230026;中国科学技术大学合肥微尺度物质科学国家研究中心,合肥230026;合肥国家实验室,合肥230088)

机构地区：[1]Department of Chemical Physics,University of Science and Technology of China,Hefei 230026,China [2]Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China [3]Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

出　　处：《Chinese Journal of Chemical Physics》2024年第4期461-464,I0093,共5页化学物理学报（英文）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB0450202).

摘　　要：To identify the species in liquid surface using mass spectrometry,we must eliminate or reduce interferences during the vaporization or desorption of the species from the liquid surface.It is much more challenging to isolate the ionic,larger species from the liquid surface,because of the frangible structures and the higher solvation energies of those species.Here we demonstrate a new mass spectrometry in which the ionic species at the liquid surface can be desorbed with ultrasoft infrared picosecond laser pulses while the liquid surface is not breached.This laser desorption assisted mass spectrometry is not only a powerful tool to detect the fragile species but also promising to investigate vibrational energy transfer dynamics in the liquid surface.利用质谱探测液体表面物种,需要排除或减低从液体表面挥发或解吸物质的影响。因离子的较高溶剂化能和大分子的脆弱结构,探测液体表面的这些物种尤其困难.本文报道了一种新型质谱方法,即利用皮秒红外激光脉冲实现液体表面离子的超软解吸,同时避免破坏液体表面。这不仅可用于探测结构脆弱的物种,更为研究液体表面的分子振动能量传递提供了研究途径.

关 键 词：Ultrasoft desorption Infrared laser Picosecond pulse Mass spectrometry Liquid surface 

分 类 号：O657.63[理学—分析化学] O645.1[理学—化学]