1. School
of Chemistry and Biochemistry and Center for Organic Photonics and
Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
2. Division
of Physical Sciences and Engineering, King Abdullah University of Science and Technology, KAUST, Thuwal 23955-6900, Kingdom of Saudi Arabia
3. Department
of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
4. Department
of Chemistry, University of Washington, Seattle, Washington 98195, United States