[seminar] Anna Painelli, 11.04. (četvrtak) 14h, seminar ZTF-a i ZFK-a

[Oleg Antipin]

Resonant-energy transfer in real time

Prof. Anna Painelli
Dipartimento di Scienze Chimiche, della Vita e della
Sostenibilità Ambientale,
Università degli Studi di Parma, Italy

Datum: četvrtak, 11.04 2019.
Vrijeme : 14 sati
Mjesto: IRB, predavaona I krila

Sažetak

Intramolecular charge transfer (CT) is the key phenomenon in a variety  
of dyes that find use in OLED, organic solar cells
and whose large nonlinear optical responses are exploited in  
bioimaging, nanofabrication, etc. The large nonlinearity of the
responses of these materials shows up with a large and nontrivial  
sensitivity to the local environment. The relevant physics
of CT dyes is well captured by so-called essential state models that  
quantitatively reproduce their steady-state and timeresolved
linear and non-linear optical, accounting for vibrational coupling and  
polar solvation and its dynamics [1,2].
Intermolecular interactions can also quite naturally be accounted for  
in essential state models to address energy transfer
phenomena [3] and excitonic effects in molecular aggregates [4].
Recently, essential state model have been applied to define a  
dynamical, non-adiabatic model for Resonance Energy
Transfer (RET) [5]. Specifically, we consider two dyes, an energy  
donor (D) and an energy acceptor (A). Each dye
corresponds to a push-pull chromophore, described in terms of two
electronic states coupled to a single effective vibration. Accounting  
for dissipation phenomena within the Redfield approach,
we follow the real time dynamics of RET from the excited D towards A.  
Moreover, a newly derived multistate Redfield-
Smoluchowski equation is used to investigate how the dynamical  
disorder, induced by polar solvation, affects RET.
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