Dissertation Defenses

Doctoral students who have an upcoming dissertation oral defense are posted here. So why not take this opportunity to learn about the research that our graduate students are doing!

Dissertation Defense for Peter Frank

Program: CHEMISTRY: PHD

Department Contact Email: cindi.rohwer@unh.edu

Defense Title: THE APPLICATION OF ANTHRACENE TOWARDS THE SYNTHESIS AND MANIPULATION OF SINGLE-CHAIN NANOTECHNOLOGY

Defense Date and Time: 05/03/16 2:30 pm

Defense Location: Parsons Hall, Room S150

Defense Advisor: Professor Erik Berda


Defense Abstract: THE APPLICATION OF ANTHRACENE TOWARDS THE SYNTHESIS AND MANIPULATION OF SINGLE-CHAIN NANOTECHNOLOGY



By



Peter George Frank



University of New Hampshire, May 2016





Well-defined linear polymers precisely folded into nanostructures, capable of performing complex functions both individually and collaboratively, are abundant in nature. This has inspired numerous groups around the world to replicate this approach synthetically. The effort has been bolstered by recent advances in controlled polymerizations that facilitate a more precise synthesis of polymer chains with varying backbones and placement of functional groups. Based on the discrete folding of these polymer chains, the single-chain nanotechnology is proving itself to be a facile route to functional nano-objects, relevant to areas spanning nanomedicine, sensing, catalysis, electroactive materials, and hierarchical self-assemblies.

Chapter 0: General Introduction and Motivation, is an introductory chapter that provides the background and divulges the importance, as well as the implications of single-chain nanoparticles (SCNPs) in both characterizations and application. In chapter 1 we describe the development of our single-chain nanotechnology. We explore anthracene decorated chains and their inherent advantages via photo-driven folding under mild and ambient conditions to yield nanoparticles. Additionally, sequential folding can be achieved by incremental exposure to

ultraviolet light that allows the precise targeting of nanoparticle size while maintaining uniformity. Chapter 2 explores the functionalization of the developed anthracene based SCNPs as a platform nanotechnology. The developed single-chain nanotechnology has three independent sites that can undergo chemical modifications to tailor particle function as desired. We explore the application of Diels-Alder to functionalize the particles. In chapter 3 we probe the effects of parent polymer molecular weight and stiffness on the formation our photo-folded SCNPs. In addition, we describe the morphological aspects of SCNPs in the context of advance characterizations with microscopy, and small angle scattering. Finally, in chapter 4 we explore the formation of SCNPs by an alternate photodimerization moiety, coumarin. The synthetic strategy is discussed, but SCNP fabrication with these materials is beyond the scope of this dissertation.


 

Should you wish to cancel, make changes, or have problems with this form, please email the Graduate School with any changes or questions. Please be sure to include your name and which events you signed up for (or wish to sign up for).