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π-Conjugated Polymers with Complex Architectures.

Record Type:	Electronic resources : Monograph/item
Title/Author:	π-Conjugated Polymers with Complex Architectures.
Author:	Obhi, Nimrat Kaur.
Published:	Ann Arbor : ProQuest Dissertations & Theses, 2020
Description:	174 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-06, Section: B.
Notes:	Advisor: Seferos, Dwight S.
Contained By:	Dissertations Abstracts International82-06B.
Subject:	Chemistry.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28148424
ISBN:	9798698549925

π-Conjugated Polymers with Complex Architectures.
Obhi, Nimrat Kaur.

π-Conjugated Polymers with Complex Architectures. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 174 p.

Source: Dissertations Abstracts International, Volume: 82-06, Section: B.

Thesis (Ph.D.)--University of Toronto (Canada), 2020.

This item must not be sold to any third party vendors.

Controlled polymerization has enabled the precise synthesis of functionalized poly(3-hexylthiophene) (P3HT) and poly(3-hexylselenophene) (P3HS) “building blocks” capable of being used to construct polymers with complex architectures. In particular, the study of comb and bottlebrush polymers presents a unique and exciting opportunity to further the development of a potential class of functional materials for optoelectronics. First, the evaluation of a synthetic graft-to methodology using copper-catalyzed click chemistry to construct P3HT-graft-poly(3-alkylselenophene) comb copolymers is presented (Chapter 2). After examining a variety of synthetic conditions, it was found that the graft-to ligation strategy is appropriate for the synthesis of low- to mid-grafting density comb copolymers. The synthesis and self-assembly of densely-grafted P3HT homopolymer bottlebrushes synthesized using a graft-through methodology is also examined (Chapter 3). When thermally annealed in thin films the bottlebrush polymers linearly assemble end-on-end to form ultralong fibers. This interesting morphology is driven by π-π stacking and attractive n-hexyl interdigitation interactions at bottlebrush polymer termini, and has not previously been observed. Continuing studies on bottlebrush copolymers are also described (Chapter 4). Block copolymer bottlebrushes containing low volume fractions of P3HT are successfully synthesized in a reproducible manner, demonstrating the first graft-through strategy to result in controlled polymerization of P3HT block copolymer bottlebrushes. The copolymer bottlebrushes are extensively characterized in thin films and in solution, where their optical properties and morphologies are driven by P3HT chain interactions. Finally, preliminary results on the synthesis of all-π-conjugated bottlebrush copolymers containing P3HT and P3HS are presented (Chapter 5). Ultimately, this thesis outlines new synthetic strategies and self-assembly behaviors of π-conjugated materials with complex architectures.

ISBN: 9798698549925Subjects--Topical Terms:

188628
Chemistry.
Subjects--Index Terms:

Conjugated polymers

π-Conjugated Polymers with Complex Architectures.
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520 $a Controlled polymerization has enabled the precise synthesis of functionalized poly(3-hexylthiophene) (P3HT) and poly(3-hexylselenophene) (P3HS) “building blocks” capable of being used to construct polymers with complex architectures. In particular, the study of comb and bottlebrush polymers presents a unique and exciting opportunity to further the development of a potential class of functional materials for optoelectronics. First, the evaluation of a synthetic graft-to methodology using copper-catalyzed click chemistry to construct P3HT-graft-poly(3-alkylselenophene) comb copolymers is presented (Chapter 2). After examining a variety of synthetic conditions, it was found that the graft-to ligation strategy is appropriate for the synthesis of low- to mid-grafting density comb copolymers. The synthesis and self-assembly of densely-grafted P3HT homopolymer bottlebrushes synthesized using a graft-through methodology is also examined (Chapter 3). When thermally annealed in thin films the bottlebrush polymers linearly assemble end-on-end to form ultralong fibers. This interesting morphology is driven by π-π stacking and attractive n-hexyl interdigitation interactions at bottlebrush polymer termini, and has not previously been observed. Continuing studies on bottlebrush copolymers are also described (Chapter 4). Block copolymer bottlebrushes containing low volume fractions of P3HT are successfully synthesized in a reproducible manner, demonstrating the first graft-through strategy to result in controlled polymerization of P3HT block copolymer bottlebrushes. The copolymer bottlebrushes are extensively characterized in thin films and in solution, where their optical properties and morphologies are driven by P3HT chain interactions. Finally, preliminary results on the synthesis of all-π-conjugated bottlebrush copolymers containing P3HT and P3HS are presented (Chapter 5). Ultimately, this thesis outlines new synthetic strategies and self-assembly behaviors of π-conjugated materials with complex architectures.
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