Material Type  

 학위논문

 

0016932803

Date and Time of Latest Transaction  

20240214100547

ISBN  

9798379844851

DDC  

545

Author  

Lei, Haoran.

Title/Author  

Development of a Synthetic Method For 2-tetrazenes and Examination of the Mass Spectrometric Behavior of Ionized 2-Tetrazenes and Asphaltene Model - [electronic resource]

Publish Info  

[S.l.] : Purdue University., 2022

Publish Info  

Ann Arbor : ProQuest Dissertations & Theses, 2022

Material Info  

1 online resource(101 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Kenttamaa, Hilkka I.

학위논문주기  

Thesis (Ph.D.)--Purdue University, 2022.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Abstracts/Etc  

요약2-Tetrazens are often used as high energy-density materials. Only a few synthetic methods exist for making them. Further, their structure-property relationships remain largely unexplored. Asphaltenes are usually a complex mixture found in the heaviest fraction of heavy crude oil. Their structural characterization and understanding have become a pertinent task for petroleum industry around the world. Mass spectrometry is a powerful analytical tool for the detection and characterization of unknown compounds even in complex mixtures. It features high sensitivity and speed and can provide a variety of valuable information for different types of analytes. This thesis focuses on the development of an effective synthetic method for 2-tetrazenes and the mass spectrometry study of the ionized 2-tetrazenes. In addition, the mass spectrometric behavior of ionized asphaltene model compounds are also discussed in this thesis.Chapter 2 describes the instrumentation and fundamental aspects of the mass spectrometers used in the research discussed in this thesis. Chapter3 introduces an effective synthetic method for 2-tetrazens based on iodine-mediated oxidative N-N coupling reaction of hydrazines. Chapter 4 presents the fragmentation behavior of ionized 2-tetrazenes in tandem mass spectrometry experiments. Upon collision-activated dissociation (CAD), ionized alkyl-substituted linear 2- tetrazenes underwent simpler fragmentation reactions than the ionized aromatic 2-tetrazenes or a cyclic 2-tetrazene. The observations were rationalized by using quantum chemical calculations. Chapter 5 presents the fragmentation behavior of ionized asphaltene model compounds under medium-energy collision-activated dissociation (MCAD). The comparison between the different behaviors of the molecular radical cations of these compounds provided useful information for the identification of related unknown compound.

Subject Added Entry-Topical Term  

Mass spectrometry.

Subject Added Entry-Topical Term  

Iodine.

Subject Added Entry-Topical Term  

Oxidation.

Subject Added Entry-Topical Term  

Lasers.

Subject Added Entry-Topical Term  

Ions.

Subject Added Entry-Topical Term  

Solvents.

Subject Added Entry-Topical Term  

Sensors.

Subject Added Entry-Topical Term  

Atmospheric pressure.

Subject Added Entry-Topical Term  

Scientific imaging.

Subject Added Entry-Topical Term  

Energy.

Subject Added Entry-Topical Term  

Gas flow.

Subject Added Entry-Topical Term  

Crude oil.

Subject Added Entry-Topical Term  

Nitrogen.

Subject Added Entry-Topical Term  

Analytical chemistry.

Subject Added Entry-Topical Term  

Atmospheric sciences.

Subject Added Entry-Topical Term  

Chemistry.

Subject Added Entry-Topical Term  

Optics.

Added Entry-Corporate Name  

Purdue University.

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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소장사항  

202402 2024

Control Number  

joongbu:643395