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Photolysis of Fluorinated Organic Molecules: Fluorine Mass Balances and the Roles of Nucleophiles, Rings, and Degree of Fluorination
Photolysis of Fluorinated Organic Molecules: Fluorine Mass Balances and the Roles of Nucleophiles, Rings, and Degree of Fluorination
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105155
- ISBN
- 9798297650169
- DDC
- 628
- 서명/저자
- Photolysis of Fluorinated Organic Molecules: Fluorine Mass Balances and the Roles of Nucleophiles, Rings, and Degree of Fluorination
- 발행사항
- [Sl] : University of Minnesota, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 306 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
- 주기사항
- Advisor: Arnold, William A.
- 학위논문주기
- Thesis (Ph.D.)--University of Minnesota, 2025.
- 초록/해제
- 요약Organofluorine containing pharmaceuticals and pesticides are widely used resulting in their accumulation within the environment. When these chemicals are exposed to environmental conditions, abiotic degradation pathways such as photolysis may occur. Photolysis results from photon absorption by a chromophore on the molecule. Following photon absorption, chemical bond breakage, rearrangement, and product formation may occur. Indirect photolysis is a parallel process due to reactive species present within the system absorbing photons and forming photochemically produced reactive intermediates that then go on to react with the contaminant of interest. In this work fluorinated compounds were exposed to a variety of photolysis conditions. Reaction rates, quantum yields, and bimolecular rate constants were measured to gain an understanding of the reactivity of these compounds. 19F nuclear magnetic resonance spectroscopy was used to complete fluorine mass balances, to confirm the presence and identities of organofluorine degradation products, and to aid in predicting organofluorine degradation pathways. Fluoride was the major degradation product across all studies. While defluorination into inert fluoride is the ideal degradation result, a range of organofluorine products were formed. Fluoroacetic acids, acetamides, and products retaining the parent compound fluorinated motifs were observed. The results of these studies aid in understanding how organofluorine compounds will transform within the environment and guide future design of chemicals to limit the persistence of synthetic fluorinated functional groups in the environment.
- 일반주제명
- Physical chemistry
- 일반주제명
- Analytical chemistry
- 일반주제명
- Organic chemistry
- 키워드
- Photolysis
- 기타저자
- University of Minnesota Civil Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a628
■1001 ▼aMundhenke, Thomas F.
■24510▼aPhotolysis of Fluorinated Organic Molecules: Fluorine Mass Balances and the Roles of Nucleophiles, Rings, and Degree of Fluorination
■260 ▼a[Sl]▼bUniversity of Minnesota▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a306 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-04, Section: B.
■500 ▼aAdvisor: Arnold, William A.
■5021 ▼aThesis (Ph.D.)--University of Minnesota, 2025.
■520 ▼aOrganofluorine containing pharmaceuticals and pesticides are widely used resulting in their accumulation within the environment. When these chemicals are exposed to environmental conditions, abiotic degradation pathways such as photolysis may occur. Photolysis results from photon absorption by a chromophore on the molecule. Following photon absorption, chemical bond breakage, rearrangement, and product formation may occur. Indirect photolysis is a parallel process due to reactive species present within the system absorbing photons and forming photochemically produced reactive intermediates that then go on to react with the contaminant of interest. In this work fluorinated compounds were exposed to a variety of photolysis conditions. Reaction rates, quantum yields, and bimolecular rate constants were measured to gain an understanding of the reactivity of these compounds. 19F nuclear magnetic resonance spectroscopy was used to complete fluorine mass balances, to confirm the presence and identities of organofluorine degradation products, and to aid in predicting organofluorine degradation pathways. Fluoride was the major degradation product across all studies. While defluorination into inert fluoride is the ideal degradation result, a range of organofluorine products were formed. Fluoroacetic acids, acetamides, and products retaining the parent compound fluorinated motifs were observed. The results of these studies aid in understanding how organofluorine compounds will transform within the environment and guide future design of chemicals to limit the persistence of synthetic fluorinated functional groups in the environment.
■590 ▼aSchool code: 0130.
■650 4▼aEnvironmental engineering
■650 4▼aPhysical chemistry
■650 4▼aAnalytical chemistry
■650 4▼aOrganic chemistry
■653 ▼aOrganofluorine degradation
■653 ▼aPhotolysis
■653 ▼aFluorinated pesticides
■653 ▼aFluoroacetic acids
■690 ▼a0775
■690 ▼a0486
■690 ▼a0490
■690 ▼a0494
■71020▼aUniversity of Minnesota▼bCivil Engineering.
■7730 ▼tDissertations Abstracts International▼g87-04B.
■790 ▼a0130
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359666▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
