Sep
27
Thu 4:00 PM

Organic Seminar: Willie Lau

SHOW DETAILS

When: Thursday, September 27, 2012
4:00 PM - 5:00 PM  
Where: Ryan Hall, 4003
2190 Campus Drive  
Evanston, IL 60208 map it
Audience: - Faculty/Staff - Student - Public
Contact: Nikki Piech  
Group: Department of Chemistry Organic Seminars
Category: Lectures & Meetings

Dow Chemical Company

Hosted by Professor Fraser Stoddart


Oct
11
Thu 4:00 PM

Organic Seminar: Al Nelson

SHOW DETAILS

When: Thursday, October 11, 2012
4:00 PM - 5:00 PM  
Where: Ryan Hall, 4003
2190 Campus Drive  
Evanston, IL 60208 map it
Audience: - Faculty/Staff - Student - Public
Contact: Nikki Piech  
Group: Department of Chemistry Organic Seminars
Co-sponsor(s): Department of Chemistry
Category: Lectures & Meetings

IBM

Hosted by Professor Fraser Stoddart


Nov
29
Thu 4:00 PM

Organic Seminar: Dustin Maly

SHOW DETAILS

When: Thursday, November 29, 2012
4:00 PM - 5:00 PM  
Where: Ryan Hall, 4003
2190 Campus Drive  
Evanston, IL 60208 map it
Audience: - Faculty/Staff - Student - Public
Contact: Nikki Piech  
Group: Department of Chemistry Organic Seminars
Category: Lectures & Meetings

Univ. of Washington

Hosted by Professor Alexander Statsuk


Jan
17
Thu 4:00 PM

Organic Seminar: Michael Jung

SHOW DETAILS

When: Thursday, January 17, 2013
4:00 PM - 5:00 PM  
Where: Ryan Hall, 4003
2190 Campus Drive  
Evanston, IL 60208 map it
Audience: - Faculty/Staff - Student - Public
Contact: Nikki Piech  
Group: Department of Chemistry Organic Seminars
Category: Lectures & Meetings

UCLA

Hosted by Professor Rick Silverman


Jan
24
Thu 4:00 PM

Organic Seminar: Stephen Craig

SHOW DETAILS

When: Thursday, January 24, 2013
4:00 PM - 5:00 PM  
Where: Ryan Hall, 4003
2190 Campus Drive  
Evanston, IL 60208 map it
Audience: - Faculty/Staff - Student - Public
Contact: Pam Beck  
Group: Department of Chemistry Organic Seminars
Category: Lectures & Meetings

Duke University

Hosted by Professor Sam Stupp

On Thursday, January 24th, Professor Stephen Craig of Duke University will be visiting the chemistry department to present a special seminar at 4:00pm in Ryan 4003. The title of his lecture is “Mechanochemistry: From Trapped Transition States to Self-Healing Polymers” and his abstract is below. There will be coffee and cookies outside of 4003 before the lecture and a chair's reception following the lecture in K148. More information on Dr. Craig can be found at: http://craiglab.chem.duke.edu/about-2/stephen-craig-phd  

 

Abstract:  The forces typical of the macroscopic world (for example, those between a baby's fingers) are many orders of magnitude larger than the forces between the individual atoms of a molecule. It has been known for decades, in fact, that breaking a piece of plastic or shearing a polymer solution can lead to homolytic carbon-carbon bond scission along the main chain of an organic polymer and a concomitant reduction in molecular weight. The magnitude of macroscopic forces, in combination with the fact that they are directional, creates an opportunity to direct chemistry that might otherwise be effectively impossible.

This talk will present studies of reactions under large, directional forces, and their use in examining questions of fundamental reactivity and new classes of stress-responsive polymers. Specific outcomes include the ability to trap transition states for extended periods of time, molecules that get shorter in response to being pulled, and the nearly instantaneous and reagentless conversion of a single homopolymer into well-ordered diblock copolymers. Within materials applications, a new class of self-strengthening polymers will be introduced, in which mechanical activation of chemical reactions leads to improved structure and properties under conditions that are typically destructive to both.

 

 1 2 >