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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 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
- 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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■006m o d
■007cr#unu||||||||
■020 ▼a9798384026952
■035 ▼a(MiAaPQ)AAI31485148
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■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.


