1. 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, USA
2. Department of Chemical and Biomolecular Engineering, Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois Urbana–Champaign, 600 S. Mathews Avenue, Urbana, Illinois 61801, USA
3. Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ 85721-0041, USA
4. Department of Physics and Center for Functional Materials, Wake Forest University, Winston-Salem, NC 27109, USA
5. School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA