Ultrafast Spectroscopy in the Elles Group

Chemical reactions are all about making, breaking, and rearranging bonds. That process is relatively straight-forward if you consider only the reactants and products, but what happens during the reaction? In the Elles Group, we seek to answer this question at the molecular scale by studying the dynamics of solution-phase chemical reactions.

Our primary tool is a state-of-the-art ultrafast laser that delivers extremely short ( <35 fs) pulses of light. The laser pulses allow us to watch chemical reactions unfold on the timescale of atomic motion via time-resolved spectroscopy. 

In the simplest case, called pump-probe, one laser pulse excites the sample, then a second, time-delayed probe pulse records changes in the absorption spectrum as the 

Laser Work

system evolves. This transient absorption signal monitorsthe evolution of molecules along the reaction coordinate. 

Ultimately, we can even use what we learn about the reaction dynamics to selectively control the outcome of a chemical reaction!

 

 


Elles Group Highlights
  • Group alum and local beer brewer Victoria Gunderson (B.S. 2016) is named a Hawk to Watch. Read her story here.
  • The group presents three posters at the annual Kansas Physical Chemistry Symposium.
  • Tim and Matt have their paper on resonance-enhanced excited-state Raman scattering accepted for publication in JPC.
  • Congratulations to Dr. Tim Quincy for his successful Ph.D. defense! Tim will be off to start a teaching postdoc at St. Ambrose University in the fall. Good luck, Tim!!
  • Former undergrad Nick Jackson starts a new teaching position at Olathe South High School. Good luck, Nick!
  • Read more by clicking here...
Funding Sources