1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
2. Oxford Centre for Collaborative Applied Mathematics (OCCAM), University of Oxford, St Giles’ 24-29, OX1 3LB Oxford, United Kingdom
3. Institute for Pure and Applied Mathematics, University of California Los Angeles, 460 Portola Plaza, Los Angeles, California 90095, United States
4. Center for Organic Photonics and Electronics and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States