摘要
通过基质辅助激光解吸电离质谱(MALDI-MS)、激光解吸离子化质谱(LDI-MS)和碰撞诱导解离串联质谱(CID-MS/MS)分析大碳笼富勒烯D_(3d)(3)-C_(96)的电离特征和分子离子的碎裂、内嵌加和反应行为,并利用MALDI和LDI对大碳笼富勒烯D_(3d)(3)-C_(96)的分析分别采用软电离和硬电离方法。结果表明:在LDI方法中,随着激光强度增加,D_(3d)(3)-C_(96)失去C2单元的系列碎片离子中,C+92、C+88、C+82、C+70等碎片离子表现出"魔数"现象;在CIDMS/MS方法中,不仅观察到D_(3d)(3)-C+96连续失去C2单元形成一系列碎片离子,而且还观察到该大碳笼富勒烯离子经碰撞将氦(He)内嵌入其碳笼内,进而再断裂成相应的碎片离子。
Matrix assisted laser desorption/ionization mass spectrometry（MALDI-MS）,Laser desorption/ionization mass spectrometry（LDI-MS）and Collision-induced dissociation tandom mass spectrometry（CID-MS/MS）methods were successively adopted to study ionization feature,molecular ion fragmentation and encasing addition of the higher fullerene D3d（3）-C96.Besides,soft and hard ionization method was used in analysis of higher fullerene D3d（3）-C96 by MALDI and LDI.The results show that in LDI method,with the increase of laser intensity,some special fragment ions such as C92^＋,C88^＋,C82^＋ and C70^＋ among a series of fragment ions of D3d（3）-C96 losing C2 present＂magic number＂effect.In CID-MS/MS method,we not just observed D3d（3）-C96^＋ continuously lost C2 and formed a series of fragment ions,but also observed the higher fullerene ion encased Helium in the carbon cage through collision and then split into the relative fragment ions.
作者
邱雅娜
李燕丽
孙丹燕
马海迪
刘子阳
杨华
俞梅兰
QIU Yana;LI Yanli;SUN Danyan;MA Haidi;LIU Ziyang;YANG Hua;YU Meilan(College of Material Science and Engineering,China Jiliang University;College of Life Science,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《浙江理工大学学报（自然科学版）》
2018年第4期491-497,共7页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金项目(11274283
21405140)
浙江省科技厅项目(2013C24017)
浙江省自然科学基金项目(LR12B01001)
浙江理工大学科研启动基金(15042089-Y)
浙江省大学生科研创新活动计划资助项目(2014R409008)
关键词
质谱
富勒烯
C96
碰撞诱导解离
氦
mass spectra
fullerene
C 96
collision-induced dissociation
helium
