پديد آورنده :
جازان، الهام
عنوان :
اندازه گيري ثابت سرعت تشكيل يون هاي پرتونه شده و ديمرهاي با مرز پروتون در فاز گازي و طيف سنجي تحرك يوني وارون ﴿Inverse Ion Mobility Spectrometry﴾
گرايش تحصيلي :
شيمي فيزيك
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده شيمي
صفحه شمار :
هجده،208ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمود تبريزچي
استاد مشاور :
حسين فرخ پور
توصيفگر ها :
واكنش يون - مولكول , قدرت تفكيك , اسپكترومتر تحرك يوني وارون
تاريخ نمايه سازي :
28/9/89
استاد داور :
محمد كاظم اميني، حسين موسوي پور، علي اصغر انصافي، عزت كشاورزي
كد ايرانداك :
ID337 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Measuring rate constant for formation of protonated ions and proton bound dimers and Inverse Ion Mobility Spectrometry IIMS Elham Jazan e jazan@yahoo com October 06 2010 Department of Chemistry Isfahan University of Technology 84156 83111 Isfahan Iran Prof M Tabrizchi e mail m tabriz@cc iut ac ir Dr H Farrokhpour e mail h farrokh@cc iut ac ir Prof B Najafi e mail najafi@cc iut ac ir Isfahan University of Technology 84156 83111 Isfahan Iran Abstract This thesis includes two parts In the first part a method was proposed to measure the rate constant for the formation of symmetrical proton bound dimers at ambient pressure The sample is continuously delivered to the drift region of an ion mobility spectrometer where it reacts with a swarm of monomer ions injected by the shutter grid Dimer ions are formed in the drift tube and a tail appears in the ion mobility spectrum The rate constant is derived from the mobility spectra The proposed approach was typically examined for methyl isobutyl ketone MIBK 2 4 dimethyl pyridine DMP and dimethyl methyl phosphonate DMMP The proposed method was extended to measure the rate constant for the formation of protonated molecules When the sample is continuously delivered to the drift region of the ion mobility spectrometer it also reacts with a swarm of reactant ions injected by the shutter grid Like dimmers monomer ions are also formed in the drift tube and a tail appears between the reactant and monomer peaks in the spectrum Similarly the rate constant is derived from the mobility spectra Some monomers appeared in the first tail proceed to form dimmers that will appear after the monomer peak Hence a third tail due to the consecutive reaction R M D will appear between the reactant ion and the dimer peaks The distribution of those dimers was calculated and subtracted from the experimental tail to obtain more accurate rate constants In the second part of the thesis a novel method was proposed for enhancing the separation power of ion mobility spectrometry IMS and other similar pulsed techniques such as time of flight mass spectrometry In this technique rather than generating an ion packet a dip is created in the ion beam This is achieved by an inverse pulse applied to the shutter grid The dip moves with the same velocity as the ion packet and the detector reads an inverse peak at the same drift time as that of the normal operation Using this technique we achieved 30 60 higher resolution compared to the normal method In addition two close peaks that were not resolved via normal IMS were well resolved to the baseline using this technique The main reason for the increased resolution is likely the absence of space charge in the dip Key Words Rate constant Ion molecule reaction Ion mobility Resolution Inverse ion mobility spectrometry
استاد راهنما :
محمود تبريزچي
استاد مشاور :
حسين فرخ پور
استاد داور :
محمد كاظم اميني، حسين موسوي پور، علي اصغر انصافي، عزت كشاورزي
