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Polymeric materials: From comb polym...

Runge, Michael Brett.

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Polymeric materials: From comb polymers to cascade reactions.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Polymeric materials: From comb polymers to cascade reactions./
作者:	Runge, Michael Brett.
面頁冊數:	191 p.
附註:	Adviser: Ned B. Bowden.
Contained By:	Dissertation Abstracts International69-02B.
標題:	Chemistry, Organic. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3301739
ISBN:	9780549471417

Polymeric materials: From comb polymers to cascade reactions.
Runge, Michael Brett.

Polymeric materials: From comb polymers to cascade reactions. - 191 p.

Adviser: Ned B. Bowden.

Thesis (Ph.D.)--The University of Iowa, 2007.

This thesis addresses two distinct areas of chemistry: polymer chemistry and organic synthesis. The first area of study was polymer chemistry and the problem I addressed was limitation for domain sizes of morphologies of self-assembled linear block copolymers. Linear block copolymers typically self-assemble into morphologies with domain sizes less than 100 nm. Accessing materials that have morphologies with larger domain sizes is important because these materials have optical properties that make them useful for many applications.

ISBN: 9780549471417Subjects--Topical Terms:

516206
Chemistry, Organic.

Polymeric materials: From comb polymers to cascade reactions.
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245 1 0 $a Polymeric materials: From comb polymers to cascade reactions.
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502 $a Thesis (Ph.D.)--The University of Iowa, 2007.
520 $a This thesis addresses two distinct areas of chemistry: polymer chemistry and organic synthesis. The first area of study was polymer chemistry and the problem I addressed was limitation for domain sizes of morphologies of self-assembled linear block copolymers. Linear block copolymers typically self-assemble into morphologies with domain sizes less than 100 nm. Accessing materials that have morphologies with larger domain sizes is important because these materials have optical properties that make them useful for many applications.
520 $a We are advancing the area of self-assembly of block copolymers by synthesizing and assembling a novel polymeric architecture termed "comb polymer". Our results report a robust comb polymer synthesis that can be used to synthesize many different polymeric materials. We report the self-assembly of these comb block copolymers into ordered arrays that have domain sizes exceeding 200 nm. We have shown that these assembled polymers act as photonic materials due to the large domain size of their morphologies, and that domain size and photonic properties can be manipulated by exposure to organic solvents. We have concluded that this unique architecture has an advantage of assembling into large domain sizes more easily than linear block copolymers.
520 $a The second area of chemistry in this thesis is the site-isolation of catalysts for use in cascade reactions. Synthetic organic chemistry has a wide array of reactions that can be used to synthesize almost any molecule, but these reactions must be carried out in separate flasks. We report the use of polymeric thimbles as a new way to site-isolate incompatible catalysts and reagents from one another to carry out two reactions in one pot. These thimbles site-isolate molecules based on polarity; diffusion of nonpolar molecules through the thimble is rapid while diffusion is slow for polar or ionic molecules. We successfully deprotected cyclic ketals in water followed by reaction with butyllithium or Grignard reagents resulting in quantitative conversions to the corresponding alcohols. These reactions are extremely incompatible and would never work if the reagents were simply mixed together. We concluded that our site-isolation technique has great utility in organic synthesis and will be able to be applied broadly.
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