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Spectroscopic Study of Photogenerated Radical Pairs in Chromophore-Linked DNA Hairpins
Spectroscopic Study of Photogenerated Radical Pairs in Chromophore-Linked DNA Hairpins
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105254
- ISBN
- 9798265483096
- DDC
- 540
- 서명/저자
- Spectroscopic Study of Photogenerated Radical Pairs in Chromophore-Linked DNA Hairpins
- 발행사항
- [Sl] : Northwestern University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 143 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
- 주기사항
- Advisor: Wasielewski, Michael.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2025.
- 초록/해제
- 요약Quantum information science (QIS) has gained notable traction in recent years, earning significant federal investment in technology development, workforce training, and research centers. With the potential to deliver revolutionary improvements to computing, sensing, and communication, QIS has seen major breakthroughs over the past decade. Among the emerging platforms for QIS technologies, molecular systems have earned attention, due to the atomic-level control of quantum properties afforded by molecular design and chemical synthesis. Additionally, a wide array of spectroscopic techniques enables facile investigation of these properties and offers powerful tools to explore fundamental questions in QIS. This thesis leverages advanced spectroscopic methods to study the quantum properties of a highly tunable molecular scaffold: chromophore-linked DNA hairpins. These systems offer exciting potential for QIS applications and represent a growing area of exploration in the field.Chapter 1 provides key background for the field of QIS and relevant concepts. In Chapter 2, we explore how chirality-induced spin selectivity (CISS) influences the dynamics of photogenerated spin-correlated radical pairs (SCRPs) within chromophore-linked DNA hairpins. Using napthalenediimide (NDI) as a hairpin linker and hole donor and stilbene diether (Sd) as a hole trap, we find that CISS perturbs the initial state of the SCRP using time-resolved electron paramagnetic resonance (TREPR) techniques. We investigate the effect that DNA length and magnetic field strength impart on the observed CISS magnitude. In Chapter 3, we investigate the same phenomenon while implementing a new terminal hole trap, deuterated perylene (Per-d11) which has favorable magnetic parameters that promote high spectral resolution in TREPR. We again find significant CISS contributions to the initial SCRP state with similar quantitative trends. In Chapter 4, we explore hairpins linked with perylene diimide (PDI) to enable visible light excitation. We find that Sd significantly extends SCRP lifetimes, while PDI aggregation suppresses charge transfer via excimer formation. TREPR reveals SCRP signatures despite aggregation, and in Sd-containing hairpins, long-lived SCRPs favor radical pair intersystem crossing (RP-ISC) over other triplet formation pathways.
- 일반주제명
- Chemistry
- 일반주제명
- Physical chemistry
- 일반주제명
- Nanotechnology
- 일반주제명
- Optics
- 키워드
- Perylene diimide
- 기타저자
- Northwestern University Chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105254
■006m o d
■007cr#unu||||||||
■020 ▼a9798265483096
■035 ▼a(MiAaPQ)AAI32277748
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aLatawiec, Elisabeth Irene.
■24510▼aSpectroscopic Study of Photogenerated Radical Pairs in Chromophore-Linked DNA Hairpins
■260 ▼a[Sl]▼bNorthwestern University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a143 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: B.
■500 ▼aAdvisor: Wasielewski, Michael.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2025.
■520 ▼aQuantum information science (QIS) has gained notable traction in recent years, earning significant federal investment in technology development, workforce training, and research centers. With the potential to deliver revolutionary improvements to computing, sensing, and communication, QIS has seen major breakthroughs over the past decade. Among the emerging platforms for QIS technologies, molecular systems have earned attention, due to the atomic-level control of quantum properties afforded by molecular design and chemical synthesis. Additionally, a wide array of spectroscopic techniques enables facile investigation of these properties and offers powerful tools to explore fundamental questions in QIS. This thesis leverages advanced spectroscopic methods to study the quantum properties of a highly tunable molecular scaffold: chromophore-linked DNA hairpins. These systems offer exciting potential for QIS applications and represent a growing area of exploration in the field.Chapter 1 provides key background for the field of QIS and relevant concepts. In Chapter 2, we explore how chirality-induced spin selectivity (CISS) influences the dynamics of photogenerated spin-correlated radical pairs (SCRPs) within chromophore-linked DNA hairpins. Using napthalenediimide (NDI) as a hairpin linker and hole donor and stilbene diether (Sd) as a hole trap, we find that CISS perturbs the initial state of the SCRP using time-resolved electron paramagnetic resonance (TREPR) techniques. We investigate the effect that DNA length and magnetic field strength impart on the observed CISS magnitude. In Chapter 3, we investigate the same phenomenon while implementing a new terminal hole trap, deuterated perylene (Per-d11) which has favorable magnetic parameters that promote high spectral resolution in TREPR. We again find significant CISS contributions to the initial SCRP state with similar quantitative trends. In Chapter 4, we explore hairpins linked with perylene diimide (PDI) to enable visible light excitation. We find that Sd significantly extends SCRP lifetimes, while PDI aggregation suppresses charge transfer via excimer formation. TREPR reveals SCRP signatures despite aggregation, and in Sd-containing hairpins, long-lived SCRPs favor radical pair intersystem crossing (RP-ISC) over other triplet formation pathways.
■590 ▼aSchool code: 0163.
■650 4▼aChemistry
■650 4▼aPhysical chemistry
■650 4▼aNanotechnology
■650 4▼aOptics
■653 ▼aQuantum information science
■653 ▼aChirality-induced spin selectivity
■653 ▼aNapthalenediimide
■653 ▼aSpin-correlated radical pairs
■653 ▼aPerylene diimide
■690 ▼a0485
■690 ▼a0494
■690 ▼a0752
■690 ▼a0652
■71020▼aNorthwestern University▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g87-06B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360035▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


