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UID:6a0f6585083de
DTSTART:20260527T090000Z
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TRANSP:OPAQUE
DTEND:20260527T100000Z
LOCATION:Elements Room
SUMMARY:ICFO | ANTONIETTA DE SIO
CLASS:PUBLIC
DESCRIPTION:Ultrafast non-equilibrium dynamics following photoexcitation of
  functional materials arise from a complex interplay between electronic an
 d vibrational motion. A detailed understanding of how vibronic couplings i
 nfluence the initial energy redistribution\, relaxation and localization o
 f excitations is crucial not only for interpreting ultrafast phenomena\, b
 ut also for controlling nanoscale energy transport and for guiding the rat
 ional design of functional materials for energy conversion and quantum tec
 hnologies. Most of the mechanisms underlying these processes occur on ultr
 afast\, few 100s fs timescales\, demanding experimental methods that combi
 ne high time resolution and the ability to resolve couplings. Quadrupolar 
 acceptor-donor-acceptor (A-D-A) molecules constitute an important class of
  organic functional materials\, promising for applications in photovoltaic
 s\, light emission\, and nonlinear optics. Beyond their technological rele
 vance\, they also provide a versatile material platform for investigating 
 ultrafast nonadiabatic dynamics mediated by vibronic couplings. In this ta
 lk\, I will present an overview of selected recent results obtained using 
 ultrafast two-dimensional electronic spectroscopy to get detailed insight 
 into vibration-mediated excited state dynamics in A-D-A molecules undergoi
 ng excited state symmetry breaking\, and into ultrafast wavepacket dynamic
 s through conical intersections in their aggregates [1-3]\n[1] Nature Nano
 technol. 16\, 63-68 (2021)\; [2] Nature Chem. 17\, 1742 (2025)\; [3] J. Ph
 ys. Chem. Lett. 7\, 976-983 (2026)
DTSTAMP:20260521T200525Z
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