WELCOME
A large number of group alumni attended a reunion held in 2013 on the occasion of my 70th birthday (see photos). Two years later, I ceased teaching a graduate course in physical-organic chemistry and was granted emeritus status by Northwestern. I continued leading a small group of postdocs for two 
additional years until funding from the DOE Office of Basic Research was expended and my postdocs departed for independent positions. The last postdoc disposed of our equipment and chemicals, turned out the lights and closed the door in 2017, 48 years after I began teaching and research at Northwestern. I continued working on the last few publications and organizing my files, until the pandemic effectively ended my career in chemistry.
I was privileged to work with approximately 40 B.A. and M.S. students, 35 Ph.D. students, and 30 postdocs and visiting scholars. The size of my research group varied from 3 at the beginning and near the end to a maximum of 12. I preferred having a relatively small number of bright, energetic, and productive co-workers. By the numbers, they were responsible for over 300 publications in leading scientific journals (see publications) and for the several awards that I have received during my career. They have gone on to productive careers in science, medicine, law, government service and other fields. I am proud of their accomplishments and enjoy continued interactions with many of them.
In addition to the members of my own research group I wish to acknowledge the many rewarding collaborations and interactions that I have enjoyed with colleagues both at Northwestern and in the international scientific community. Special mention should be made of the research group of my Northwestern colleague Michael Wasielewski with whom we investigated the dynamics of charge transport in DNA for over two decades.