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Updated: Aug 12, 2025

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
Published on: May 27, 2020
Modeling Excited-State Proton Transfer Using the Lindblad Equation: Quantification of Time-Resolved Spectroscopy with
Luhao Zhang1, Francesca Fassioli1,2, Bo Fu1
1Department of Chemistry, Princeton University, Princeton, New Jersey08544, United States.
This study explores excited-state intramolecular proton transfer (ESIPT) dynamics using quantum simulations. The findings reveal simultaneous electronic and proton dynamics, crucial for interpreting time-resolved spectroscopy data.
Area of Science:
- Quantum dynamics
- Photochemistry
- Spectroscopy
Background:
- Excited-state intramolecular proton transfer (ESIPT) is a fundamental process in photochemistry.
- Understanding ESIPT dynamics is key to interpreting complex spectroscopic data.
Purpose of the Study:
- To investigate the quantum dynamics of ESIPT using a multilevel vibronic Hamiltonian and Lindblad master equation.
- To simulate time-resolved fluorescence spectroscopy for specific molecules (HBT and HBQ).
Main Methods:
- Multilevel vibronic Hamiltonian
- Lindblad master equation
- Time-resolved fluorescence spectroscopy simulation
Main Results:
- The ultrafast rise and decay in spectra are driven by simultaneous electronic state population and proton wave packet dynamics.
- Spectroscopic signals vary significantly with system properties (shape, time, intensity).
Conclusions:
- Findings offer insights for interpreting spectroscopic data and validating ESIPT mechanisms.
- The model aids in controlling ESIPT dynamics and clarifying the process through direct spectral comparison.
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