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Balancing Accuracy and Efficiency in Quantum Chemistry: Computational Models Employing Molecular Fragmentation and Machine Learning
Balancing Accuracy and Efficiency in Quantum Chemistry: Computational Models Employing Mol...
Balancing Accuracy and Efficiency in Quantum Chemistry: Computational Models Employing Molecular Fragmentation and Machine Learning

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152640
ISBN  
9798384026952
DDC  
540
저자명  
Maier, Sarah.
서명/저자  
Balancing Accuracy and Efficiency in Quantum Chemistry: Computational Models Employing Molecular Fragmentation and Machine Learning
발행사항  
[Sl] : Indiana University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
267 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
주기사항  
Advisor: Raghavachari, Krishnan.
학위논문주기  
Thesis (Ph.D.)--Indiana University, 2024.
초록/해제  
요약Quantum chemistry seeks to understand and explain the behavior of electrons within molecular systems. Computational methods which exploit quantum chemical principles probe chemical structure at the most fundamental level and allow for unparalleled accuracy. However, highly accurate methods, for example the "gold standard" CCSD(T) method, scale steeply with the size of the system. Thus, modeling complex electronic interactions both accurately and efficiently remains a grand challenge. Over recent decades, theoretical chemists have devised and advanced various approximate methods in order to mitigate the effects of steep computational scaling. In particular, the advent of hybrid quantum mechanical (QM) methods has made feasible the study of increasingly diverse and complex systems. The work presented herein focuses on the development and application of a few such methods, with relevance to a wide range of systems. This work presents several computational models capable of correcting deficiencies in low accuracy density functional theory methods. The first half of this dissertation presents a series of models that leverage physics-based QM methods as well as machine learning (ML) techniques for highly accurate predictions of various physiochemical properties of small molecules. In particular, the applicability of these error correction schemes is highlighted through studies of redox potentials, ionization potentials, and pKas. In the later half, we highlight work done in the efficient application of QM methods to the calculation of protein-ligand binding energies. Specifically, we employ the molecular fragmentation method, Molecules-In-Molecules or MIM, to render QM calculations of large biological complexes more computationally tractable. Finally, we demonstrate the efficient incorporation of dynamical effects into our MIM protein-ligand binding protocol using molecular fragmentation and unsupervised ML.
일반주제명  
Chemistry
일반주제명  
Quantum physics
일반주제명  
Physical chemistry
일반주제명  
Computational chemistry
일반주제명  
Molecular chemistry
키워드  
Quantum chemistry
키워드  
Molecular systems
키워드  
Quantum mechanical
키워드  
Machine learning
키워드  
Redox potentials
기타저자  
Indiana University Chemistry
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aMaier,  Sarah.
■24510▼aBalancing  Accuracy  and  Efficiency  in  Quantum  Chemistry:  Computational  Models  Employing  Molecular  Fragmentation  and  Machine  Learning
■260    ▼a[Sl]▼bIndiana  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a267  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-02,  Section:  B.
■500    ▼aAdvisor:  Raghavachari,  Krishnan.
■5021  ▼aThesis  (Ph.D.)--Indiana  University,  2024.
■520    ▼aQuantum  chemistry  seeks  to  understand  and  explain  the  behavior  of  electrons  within  molecular  systems.  Computational  methods  which  exploit  quantum  chemical  principles  probe  chemical  structure  at  the  most  fundamental  level  and  allow  for  unparalleled  accuracy.  However,  highly  accurate  methods,  for  example  the  "gold  standard"  CCSD(T)  method,  scale  steeply  with  the  size  of  the  system.  Thus,  modeling  complex  electronic  interactions  both  accurately  and  efficiently  remains  a  grand  challenge.  Over  recent  decades,  theoretical  chemists  have  devised  and  advanced  various  approximate  methods  in  order  to  mitigate  the  effects  of  steep  computational  scaling.  In  particular,  the  advent  of  hybrid  quantum  mechanical  (QM)  methods  has  made  feasible  the  study  of  increasingly  diverse  and  complex  systems. The  work  presented  herein  focuses  on  the  development  and  application  of  a  few  such  methods,  with  relevance  to  a  wide  range  of  systems.  This  work  presents  several  computational  models  capable  of  correcting  deficiencies  in  low  accuracy  density  functional  theory  methods.  The  first  half  of  this  dissertation  presents  a  series  of  models  that  leverage  physics-based  QM  methods  as  well  as  machine  learning  (ML)  techniques  for  highly  accurate  predictions  of  various  physiochemical  properties  of  small  molecules.  In  particular,  the  applicability  of  these  error  correction  schemes  is  highlighted  through  studies  of  redox  potentials,  ionization  potentials,  and  pKas.  In  the  later  half,  we  highlight  work  done  in  the  efficient  application  of  QM  methods  to  the  calculation  of  protein-ligand  binding  energies.  Specifically,  we  employ  the  molecular  fragmentation  method,  Molecules-In-Molecules  or  MIM,  to  render  QM  calculations  of  large  biological  complexes  more  computationally  tractable.  Finally,  we  demonstrate  the  efficient incorporation  of  dynamical  effects  into  our  MIM  protein-ligand  binding  protocol  using  molecular  fragmentation  and  unsupervised  ML.
■590    ▼aSchool  code:  0093.
■650  4▼aChemistry
■650  4▼aQuantum  physics
■650  4▼aPhysical  chemistry
■650  4▼aComputational  chemistry
■650  4▼aMolecular  chemistry
■653    ▼aQuantum  chemistry
■653    ▼aMolecular  systems
■653    ▼aQuantum  mechanical
■653    ▼aMachine  learning
■653    ▼aRedox  potentials
■690    ▼a0485
■690    ▼a0599
■690    ▼a0431
■690    ▼a0800
■690    ▼a0219
■690    ▼a0494
■71020▼aIndiana  University▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g86-02B.
■790    ▼a0093
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163222▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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