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