October 1, 2017 at 4:45 pm

Roenigk Chemistry Lecture | Adventures in Self-Assembly: Is There Logic Here? Oct. 30

Ohio University’s Chemistry & Biochemistry Department presents the 2017 Roenigk Lecturer, Dr. Jonathan L. Sessler, on “Adventures in Self-Assembly: Is There Logic Here?” on Monday, Oct. 30, at 3 p.m. in Clippinger Laboratories 194.

The Roenigk Lecture is named for Ohio University alum Henry H. Roenigk Jr., M.D., FACP, and is a joint initiative from the Chemistry & Biochemistry Department and its first Roenigk Chair, Dr. Eric Masson. Roenigk earned his bachelor of arts degree in chemistry from Ohio University College of Arts & Sciences and his medical degree from Northwestern University Medical School.

Abstract: This lecture follows the work on new fundamental strategies for molecular recognition and self-assembly. Systems whose study is relatively advanced are the so-called cyclo[m]pyridine[n]pyrroles. These systems permit self-assembly via anion recognition. They also display substrate-dependent responsive features. This has made them of interest as sensor systems and functional materials whose ground and excited state properties may be “switched” through modulation of solvent, pH, and exposure to ionic and neutral analytes.

Complementing work on charged building blocks is the use of electron rich calix[4]pyrroles. Here, anion binding serves to switch the fundamental conformation of the core receptor so as to control self-assembly. This allows the production of monomers, capsules, and oligomers via the judicious choice of calix[4]pyrrole, anion, cation, solvent, and targeted substrate. This allows for the control of charge transfer interactions, electron transfer events, and the construction of multi-state molecular logic devices.

This work was made possible by the dedicated efforts of many coworkers and collaborators who will be thanked during the presentation. Support from the U.S. National Science Foundation, U.S. National Institutes of Health, the U.S. Department of Energy Office of Basic Energy Sciences, and the Robert A. Welch Foundation is acknowledged.

About Jonathan L. Sessler

Dr. Jonathan L. Sessler

Dr. Jonathan L. Sessler

Sessler received a B.S. degree (with Highest Honors) in chemistry in 1977 from the University of California, Berkeley. He earned a Ph.D. from Stanford University in 1982 (supervisor: Prof. James P. Collman). He was a postdoctoral fellow with Prof. Jean-Marie Lehn in Strasbourg, France. He was then a JSPS Visiting Scientist in Professor Tabushi’s group in Kyoto, Japan. In September, 1984 he joined the chemistry faculty at the University of Texas at Austin, where he is currently the Doherty-Welch Chair. Sessler has coauthored more than 650 research publications and been an inventor of record on more than 75 issued U.S. patents. His H-index is 95. Sessler is an Associate Editor for ChemComm. He was a co-founder of Pharmacyclics Inc., which was acquired by AbbVie for $21B in 2015. He is now helping launch a new company, Cible Inc.

About Dr. Henry Roenigk

Roenigk is a nationally recognized dermatologist. He attended Northwestern University Medical School, completed his internship at Tripler Army Hospital, Fellowship in Dermatology at Cleveland Clinic. He was the chairman of Dermatology at both Northwestern University, as well as Cleveland Clinic for 25 years. He is Board Certified with the American Board of Dermatology.

Roenigk is Professor Emeritus of Dermatology at Northwestern University Medical School. He has edited multiple medical textbooks including Roenigk’s Dermatologic Surgery: Current Techniques in Procedural Dermatology and Psoriasis. He has served on the boards of many professional associations, including serving as president for both the American and the International Societies for Dermatologic Surgery. He was also the chairman of dermatology at Northwestern University for 16 years and at the Cleveland Clinic for nine years. He is a member of the editorial board for Cutis and has authored more than 300 journal articles, 11 books, and numerous book chapters on psoriasis and dermatology.

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