Brad S. Lokitz
University of Southern Mississippi
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Publication
Featured researches published by Brad S. Lokitz.
Soft Matter | 2008
Charles L. McCormick; Brent S. Sumerlin; Brad S. Lokitz; Jonathan E. Stempka
This review highlights recent advances in the synthesis of functional, temperature-responsive, water-soluble block copolymers, including particular focus on the results obtained by employing reversible addition–fragmentation chain transfer (RAFT) polymerization. The applicability of the RAFT process for the polymerization of functional monomers under a diverse range of experimental conditions has facilitated the synthesis of water-soluble (co)polymers that were previously inaccessible. Unprecedented control afforded by RAFT in homogeneous aqueous media allows well-defined polymeric systems to be prepared without stringent purification techniques and under increasingly “green” conditions while maintaining the ability to tailor many of the macromolecular characteristics (molecular weight, chain topology, copolymer composition, functionality, etc.) that affect self-assembly in solution. Block copolymer formation and postpolymerization modification utilizing crosslinking and copper-catalyzed azide–alkyne “click” chemistry are described, with attention being paid to their ability to control copolymer structure for subsequent self-assembly in response to changes in temperature.
Australian Journal of Chemistry | 2006
Brad S. Lokitz; Jonathan E. Stempka; Adam W. York; Yuting Li; Hitesh K. Goel; G. Reid Bishop; Charles L. McCormick
Chiral homo- and block copolymers based on the enantiomeric monomers N-acryloyl-l-alanine (ALAL) and N-acryloyl-d-alanine (ADAL) were prepared directly in water using controlled reversible addition–fragmentation chain transfer (RAFT) polymerization. The polymerization of the chiral monomers proceeded in a controlled fashion producing the respective homopolymers, block copolymers, and a statistical copolymer with targeted molecular weights and narrow molecular weight distributions. The chiroptical activity of these biomimetic polymers and their analogous model compounds was investigated using circular dichroism (CD). P(ALAL) and P(ADAL) were shown to be optically active exhibiting mirror image CD spectra. In addition, statistical and enantiomeric block copolymers prepared at 1:1 stochiometric ratios exhibited virtually no optical activity.
Angewandte Chemie | 2006
Yuting Li; Brad S. Lokitz; Charles L. McCormick
Macromolecules | 2006
Anthony J. Convertine; Brad S. Lokitz; Yuliya Vasileva; Leslie J. Myrick; Charles W. Scales; and Andrew B. Lowe; Charles L. McCormick
Macromolecules | 2006
Yuting Li; Brad S. Lokitz; Steven P. Armes; Charles L. McCormick
Macromolecules | 2006
Yuting Li; Brad S. Lokitz; Charles L. McCormick
Macromolecules | 2006
Brad S. Lokitz; Anthony J. Convertine; Ryan G. Ezell; Andrew Heidenreich; Yuting Li; Charles L. McCormick
Macromolecules | 2007
Yuting Li; Adam E. Smith; Brad S. Lokitz; Charles L. McCormick
Macromolecular Rapid Communications | 2005
Anthony J. Convertine; Brad S. Lokitz; Andrew B. Lowe; Charles W. Scales; Leslie J. Myrick; Charles L. McCormick
Macromolecules | 2007
Brad S. Lokitz; Adam W. York; Jonathan E. Stempka; Neil D. Treat; Yuting Li; William L. Jarrett; Charles L. McCormick