자료유형  

 학위논문

Control Number  

0017163922

International Standard Book Number  

9798346857877

Dewey Decimal Classification Number  

540

Main Entry-Personal Name  

Oanta, Alexander Kevin.

Publication, Distribution, etc. (Imprint  

[S.l.] : Northwestern University., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

201 p.

General Note  

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

General Note  

Advisor: Dichtel, William R.

Dissertation Note  

Thesis (Ph.D.)--Northwestern University, 2024.

Summary, Etc.  

요약Polymers are one of the most common classes of materials today and have been the basis of countless technological advancements. Traditionally, they are linear, acyclic structures. In the past few decades, new classes of polymers have been discovered and developed. One such class is two-dimensional polymers (2DPs), which are covalently-linked planar, sheet-like structures formed across two dimensions. These sheets can additionally stack on each other and form narrow channels of open space, resulting in materials with crystallinity, porosity, and protected cavities. The functionalities and geometries of these monomers can be tuned, directing the topology and functionality of the resulting polymer sheets. These materials can be used for a variety of applications including catalysis and chemical separations and can be integrated into electronic and spintronic devices. Another class of polymers developed recently includes poly[n]catenanes, which are polymer chains consisting of n interlocking rings. The rings are comprised of covalent bonds, offering chemical stability, while the rings are held together via mechanically interlocking bonds, offering conformational flexibility to the polymer chain. This combination of stability and flexibility for an organic material is unique, but applications have been underexplored due to the difficulty of synthetic accessibility and preparing poly[n]catenanes on scale.This thesis advances the development and application scope of both 2DPs and poly[n]catenanes. In Chapter 1, I discuss historical work for each polymer class, followed by work done in the Dichtel lab towards each frontier. In Chapter 2, I demonstrate that the side-chain interactions in 2DP pores help dictate the stacking order of the overall structure. This directly impacts the application scope of 2DPs, as different applications may rely on different degrees of sheet stacking. In Chapter 3, I demonstrate that 2DPs can host radical anions along the polymer backbone, acting as quantum bits, which are functional units for quantum information science applications. Using 2DPs for qubits offers several advantages over current molecular and framework systems, and this distinction is covered in depth. In Chapter 4, I outline a new procedure to produce long-chain poly[n]catenanes on scale. This approach relies on combining macrocyclization, catenation, and polymerization in one pot using mild conditions. The monomers used are acyclic and readily accessible on large scale, overcoming the synthetic limitations of previous poly[n]catenane syntheses. Taken together, this thesis explores the synthesis, application scope, and structure-property relationships of both 2DPs and poly[n]catenanes as emerging classes of materials.

Subject Added Entry-Topical Term  

Chemistry.

Subject Added Entry-Topical Term  

Physical chemistry.

Subject Added Entry-Topical Term  

Polymer chemistry.

Index Term-Uncontrolled  

Crystalline

Index Term-Uncontrolled  

Polymer architectures

Index Term-Uncontrolled  

Two-dimensional polymers

Index Term-Uncontrolled  

Quantum information science

Added Entry-Corporate Name  

Northwestern University Chemistry

Host Item Entry  

Dissertations Abstracts International. 86-06B.

Electronic Location and Access  

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Control Number  

joongbu:654642