Isaac B. Bersuker, PhD, DSc, was a Senior Research Scientist and Adjunct Professor of Theoretical Chemistry at the University of Texas at Austin. He is a member of the Academy of Sciences of Moldova and the recipient of numerous awards, including the Medal of Honor (Republic of Moldova), the David Ben-Gurion Medal (Be'er Sheva University), and the Chugaev Medal (Russian Academy of Sciences). Dr. Bersuker has published 425 peer-reviewed papers, authored 15 books and 35 major reviews, and supervised more than 50 PhD theses. Yang Liu, PhD, is an Associate Professor in the School of Chemistry and Chemical Engineering at Harbin Institute of Technology. She conducted her postdoctoral research with Dr. Issac B. Bersuker and Dr. James E. Boggs at the University of Texas at Austin and with Dr. Dong-Sheng Yang at the University of Kentucky. She has broad research interests in theoretical and computational chemistry, photochemistry, and catalytic chemistry, particularly vibronic interaction and symmetry-related research topics for molecules and solid materials with applications in physics, chemistry, environment, and biology.