Oregon State University

Calendar

Calendars

Event Details

Prof. Greg Scholes (Princeton)

Physical Chemistry Seminar

Thursday, April 6, 2017 3:30 PM - 4:30 PM

Using Coherence to Enhance Function in Chemical and Biophysical Systems

Coherence phenomena arise from interference, or the addition, of wave-like amplitudes in phase. While coherence has been shown to yield transformative new ways for improving function, advances have been limited to pristine matter, as quantum coherence is considered fragile. Recent evidence of coherence in chemical and biological systems, however, concludes that the phenomena is robust and can survive in the face of disorder and noise. I will present the state of recent discoveries. For example, two-dimensional electronic spectroscopy data allow quantitative analysis of vibronic coherence in the photosynthetic light harvesting complexes [1]. I will show how vibronic coherence plays a special role in downhill energy transfer, increasing energy transfer rates remarkably—even when electronic coupling is weak [2]. How coherence is manifest as ultrafast long range energy transfer in multiphase perovskites will be reported. I will conclude with a forecast for the role of function as a design element in realizing coherence [3].

 

[1] Scholes, et al. “Lessons from nature about solar light harvesting”  Nature Chem. 3, 763–774 (2011).

[2] Dean et al. “Vibronic Enhancement of Algae Light Harvesting” Chem (Cell Press) 1, 858–872 (2016).

[3] Scholes, et al. “Optimal Coherence in Chemical and Biophysical Dynamics” Nature (2017).

 


Linus Pauling Science Center (campus map)
402
Free
Chong Fang
541-737-6704
chong.fang at oregonstate.edu
Chemistry
This event appears on the following calendars: