1. School of Chemistry & Biochemistry, School of Materials Science & Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
2. Department
of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. Department of Chemistry, Center for Macromolecular
Science and Engineering, University of Florida, Gainesville, Florida 32611, United States