T. I. and S. V. R. acknowledge support by National Science Foundation (Nos. ECCS-1202398 and ECCS-1509786); P. S. acknowledges REU NSF (No. PHY-1359195). A. B. acknowledges the startup fund support from the University of Central Florida. The authors gratefully acknowledge access to facilities at the National Institute of Standards and Technology for PL measurements and the computational time support from the UCF Advanced Research Computing Center STOKES. We are thankful to Dr. J. Fagan as the host at NIST, Dr. J. Reimers for providing us with the CNDO code, and Dr. D. Roxbury for providing the MD trajectory.
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