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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
Spectroscopic Study of Photogenerated Radical Pairs in Chromophore-Linked DNA Hairpins

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105254
ISBN  
9798265483096
DDC  
540
저자명  
Latawiec, Elisabeth Irene.
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  
Quantum information science
키워드  
Chirality-induced spin selectivity
키워드  
Napthalenediimide
키워드  
Spin-correlated radical pairs
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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■040    ▼aMiAaPQ▼cMiAaPQ
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■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.

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