1
|
Di Maiolo F, Phan Huu DKA, Giavazzi D, Landi A, Racchi O, Painelli A. Shedding light on thermally-activated delayed fluorescence. Chem Sci 2024; 15:5434-5450. [PMID: 38638233 PMCID: PMC11023041 DOI: 10.1039/d4sc00033a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 02/17/2024] [Indexed: 04/20/2024] Open
Abstract
Thermally activated delayed fluorescence (TADF) is a hot research topic in view of its impressive applications in a wide variety of fields from organic LEDs to photodynamic therapy and metal-free photocatalysis. TADF is a rare and fragile phenomenon that requires a delicate equilibrium between tiny singlet-triplet gaps, sizable spin-orbit couplings, conformational flexibility and a balanced contribution of charge transfer and local excited states. To make the picture more complex, this precarious equilibrium is non-trivially affected by the interaction of the TADF dye with its local environment. The concurrent optimization of the dye and of the embedding medium is therefore of paramount importance to boost practical applications of TADF. Towards this aim, refined theoretical and computational approaches must be cleverly exploited, paying attention to the reliability of adopted approximations. In this perspective, we will address some of the most important issues in the field. Specifically, we will critically review theoretical and computational approaches to TADF rates, highlighting the limits of widespread approaches. Environmental effects on the TADF photophysics are discussed in detail, focusing on the major role played by dielectric and conformational disorder in liquid solutions and amorphous matrices.
Collapse
Affiliation(s)
- Francesco Di Maiolo
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - D K Andrea Phan Huu
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Davide Giavazzi
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Andrea Landi
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Ottavia Racchi
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| | - Anna Painelli
- Dept. Chemistry, Life Science and Environmental Sustainability, University of Parma Parco Area delle Scienze 17/A 43124 Parma Italy
| |
Collapse
|
2
|
Soh JH, Jansen TLC, Palacino-González E. Controlling the nonadiabatic dynamics of the charge-transfer process with chirped pulses: Insights from a double-pump time-resolved fluorescence spectroscopy scheme. J Chem Phys 2024; 160:024110. [PMID: 38193559 DOI: 10.1063/5.0177073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 12/04/2023] [Indexed: 01/10/2024] Open
Abstract
The manipulation of the ultrafast quantum dynamics of a molecular system can be achieved through the application of tailored light fields. This has been done in many ways in the past. In our present investigation, we show that it is possible to exert specific control over the nonadiabatic dynamics of a generic model system describing ultrafast charge-transfer within a condensed dissipative environment by using frequency-chirped pulses. By adjusting the external photoexcitation conditions, such as the chirp parameter, we show that the final population of the excitonic and charge-transfer states can be significantly altered, thereby influencing the elementary steps controlling the transfer process. In addition, we introduce an excitation scheme based on double-pump time-resolved fluorescence spectroscopy using chirped-pulse excitations. Here, our findings reveal that chirped excitations enhance the vibrational system dynamics as evidenced by the simulated spectra, where a substantial signal intensity dependence on the chirp is observed. Our simulations show that chirped pulses are a promising tool for steering the dynamics of the charge-transfer process toward a desired target outcome.
Collapse
Affiliation(s)
- Jia Hao Soh
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Thomas L C Jansen
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| | - Elisa Palacino-González
- Zernike Institute for Advanced Materials, University of Groningen, Groningen, The Netherlands
| |
Collapse
|
3
|
Bustamante CM, Gadea ED, Todorov TN, Horsfield A, Stella L, Scherlis DA. Fluorescence in quantum dynamics: Accurate spectra require post-mean-field approaches. J Chem Phys 2023; 158:144104. [PMID: 37061497 DOI: 10.1063/5.0142094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2023] Open
Abstract
Real time modeling of fluorescence with vibronic resolution entails the representation of the light-matter interaction coupled to a quantum-mechanical description of the phonons and is therefore a challenging problem. In this work, taking advantage of the difference in timescales characterizing internal conversion and radiative relaxation-which allows us to decouple these two phenomena by sequentially modeling one after the other-we simulate the electron dynamics of fluorescence through a master equation derived from the Redfield formalism. Moreover, we explore the use of a recent semiclassical dissipative equation of motion [C. M. Bustamante et al., Phys. Rev. Lett. 126, 087401 (2021)], termed coherent electron electric-field dynamics (CEED), to describe the radiative stage. By comparing the results with those from the full quantum-electrodynamics treatment, we find that the semiclassical model does not reproduce the right amplitudes in the emission spectra when the radiative process involves the de-excitation to a manifold of closely lying states. We argue that this flaw is inherent to any mean-field approach and is the case with CEED. This effect is critical for the study of light-matter interaction, and this work is, to our knowledge, the first one to report this problem. We note that CEED reproduces the correct frequencies in agreement with quantum electrodynamics. This is a major asset of the semiclassical model, since the emission peak positions will be predicted correctly without any prior assumption about the nature of the molecular Hamiltonian. This is not so for the quantum electrodynamics approach, where access to the spectral information relies on knowledge of the Hamiltonian eigenvalues.
Collapse
Affiliation(s)
- Carlos M Bustamante
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
| | - Esteban D Gadea
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
| | - Tchavdar N Todorov
- Centre for Quantum Materials and Technologies, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom
| | - Andrew Horsfield
- Department of Materials, Thomas Young Centre, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
| | - Lorenzo Stella
- Centre for Light-Matter Interactions, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom
| | - Damian A Scherlis
- Departamento de Química Inorgánica, Analítica y Química Física/INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
| |
Collapse
|
4
|
Giavazzi D, Saseendran S, Di Maiolo F, Painelli A. A Comprehensive Approach to Exciton Delocalization and Energy Transfer. J Chem Theory Comput 2022; 19:436-447. [PMID: 36563008 PMCID: PMC9878730 DOI: 10.1021/acs.jctc.2c00980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Indexed: 12/24/2022]
Abstract
Electrostatic intermolecular interactions lie at the heart of both the Förster model for resonance energy transfer (RET) and the exciton model for energy delocalization. In the Förster theory of RET, the excitation energy incoherently flows from the energy donor to a weakly coupled energy acceptor. The exciton model describes instead the energy delocalization in aggregates of identical (or nearly so) molecules. Here, we introduce a model that brings together molecular aggregates and RET. We will consider a couple of molecules, each described in terms of two diabatic electronic states, coupled to an effective molecular vibration. Electrostatic intermolecular interactions drive energy fluxes between the molecules, that, depending on model parameters, can be described as RET or energy delocalization. At variance with the standard Förster model for RET and of the exciton model for aggregates, our approach applies both in the weak and in the strong coupling regimes and fully accounts for the quantum nature of molecular vibrations in a nonadiabatic approach. Coupling the system to a thermal bath, we follow RET and energy delocalization in real time and simulate time-resolved emission spectra.
Collapse
Affiliation(s)
- D. Giavazzi
- Department of Chemistry,
Life Science and Environmental Sustainability, Università di Parma, 43124 Parma, Italy
| | - S. Saseendran
- Department of Chemistry,
Life Science and Environmental Sustainability, Università di Parma, 43124 Parma, Italy
| | - F. Di Maiolo
- Department of Chemistry,
Life Science and Environmental Sustainability, Università di Parma, 43124 Parma, Italy
| | - A. Painelli
- Department of Chemistry,
Life Science and Environmental Sustainability, Università di Parma, 43124 Parma, Italy
| |
Collapse
|
5
|
Synthesis, characterization and biological evaluation of novel 2-aminopridinium nicotinate invitro antifungal, insilico ADME and molecular docking studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
6
|
Sidhardh GL, Ajith A, Sebastian E, Hariharan M, Shaji A. Local Phonon Environment as a Design Element for Long-Lived Excitonic Coherence: Dithia-anthracenophane Revisited. J Phys Chem A 2022; 126:3765-3773. [PMID: 35666186 DOI: 10.1021/acs.jpca.2c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The purpose of this study is to investigate the role of a structured immediate phonon environment in determining the exciton dynamics and the possibility of using it as an optimal design element. Through the case study of dithia-anthracenophane, a bichromophore using the Hierarchical Equations Of Motion formalism, we show that the experimentally observed coherent exciton dynamics can be reproduced only by considering the actual structure of the phonon environment. While the slow dephasing of quantum coherence in dithia-anthracenophane can be attributed to strong vibronic coupling to high-frequency modes, vibronic quenching is the source of long oscillation periods in population transfer. This study sheds light on the crucial role of the structure of the immediate phonon environment in determining the exciton dynamics. We conclude by proposing some design principles for sustaining long-lived coherence in molecular systems.
Collapse
Affiliation(s)
- Govind Lal Sidhardh
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Adithi Ajith
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ebin Sebastian
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Mahesh Hariharan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Anil Shaji
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| |
Collapse
|
7
|
Divya Dexlin X, Deephlin Tarika J, Sethuram M, Joselin Beaula T. Synthesis, vibrational Depictions, IRI interpretations and docking research on coordination metal complex Diaqua aspartato zinc (II) monohydrate using DFT approach. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118687] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
8
|
Giavazzi D, Di Maiolo F, Painelli A. The fate of molecular excited states: modeling donor-acceptor dyes. Phys Chem Chem Phys 2022; 24:5555-5563. [DOI: 10.1039/d1cp05971h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the relaxation of a coherently excited molecule in the Redfield approximation. The molecular model, parametrized to describe donor-acceptor dyes that represent a large family of molecules of interest...
Collapse
|
9
|
Dexlin XD, Tarika JD, Kumar SM, Mariappan A, Beaula TJ. Synthesis and DFT computations on structural, electronic and vibrational spectra, RDG analysis and molecular docking of novel Anti COVID-19 molecule 3, 5 Dimethyl Pyrazolium 3, 5 Dichloro Salicylate. J Mol Struct 2021; 1246:131165. [DOI: 10.1016/j.molstruc.2021.131165] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Revised: 07/15/2021] [Accepted: 07/21/2021] [Indexed: 10/20/2022]
|
10
|
Wu Q, Dai P, Wang Y, Zhang J, Li M, Zhang KY, Liu S, Huang W, Zhao Q. Time-resolved analysis of photoluminescence at a single wavelength for ratiometric and multiplex biosensing and bioimaging. Chem Sci 2021; 12:11020-11027. [PMID: 34522299 PMCID: PMC8386655 DOI: 10.1039/d1sc02811a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 07/23/2021] [Indexed: 12/12/2022] Open
Abstract
Simultaneous analysis of luminescence signals of multiple probes can improve the accuracy and efficiency of biosensing and bioimaging. Analysis of multiple signals at different wavelengths usually suffers from spectral overlap, possible energy transfer, and difference in detection efficiency. Herein, we reported a polymeric luminescent probe, which was composed of a phenothiazine-based fluorescent compound and a phosphorescent iridium(iii) complex. Both luminophores emitted at around 600 nm but their luminescence lifetimes are 160 times different, allowing time-resolved independent analysis. As the fluorescence was enhanced in response to oxidation by hypochlorite and the phosphorescence was sensitive toward oxygen quenching, a four-dimensional relationship between luminescence intensity, fluorescence/phosphorescence ratio, hypochlorite concentration, and oxygen content was established. In cellular imaging, time-resolved photoluminescence imaging microscopy clearly showed the independent fluorescence response toward hypochlorite and phosphorescence response toward oxygen in separated time intervals. This work opens up a new idea for the development of multiplex biosensing and bioimaging.
Collapse
Affiliation(s)
- Qi Wu
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Peiling Dai
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Yun Wang
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Jin Zhang
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Meng Li
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Kenneth Yin Zhang
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Shujuan Liu
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| | - Wei Huang
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China .,Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU) Xi'an 710072 China.,Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech) 30 South Puzhu Road Nanjing 211816 China
| | - Qiang Zhao
- State Key Laboratory of Organic Electronics and Information Displays, Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Institute of Flexible Electronics (Future Technology), Nanjing University of Posts & Telecommunications Nanjing 210023 P. R. China
| |
Collapse
|
11
|
Anzola M, Painelli A. Aggregates of polar dyes: beyond the exciton model. Phys Chem Chem Phys 2021; 23:8282-8291. [DOI: 10.1039/d1cp00335f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Optical spectra of aggregates of polar dyes are discussed, fully accounting for polarizability of the dyes and for the coupling of electronic and vibrational degrees of freedom.
Collapse
Affiliation(s)
- Mattia Anzola
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - Anna Painelli
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| |
Collapse
|
12
|
Dhali R, Phan Huu DKA, Bertocchi F, Sissa C, Terenziani F, Painelli A. Understanding TADF: a joint experimental and theoretical study of DMAC-TRZ. Phys Chem Chem Phys 2021; 23:378-387. [DOI: 10.1039/d0cp05982j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
TADF offers a promising way to harvest triplets in OLED for improved efficiency. To concurrently optimize the dye inside the matrix, a thorough experimental and theoretical study is presented of a the TADF dye addressing environmental effects.
Collapse
Affiliation(s)
- Rama Dhali
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - D. K. Andrea Phan Huu
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - Francesco Bertocchi
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - Cristina Sissa
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - Francesca Terenziani
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| | - Anna Painelli
- Department of Chemistry
- Life Science and Environmental Sustainability
- University of Parma
- 43124 Parma
- Italy
| |
Collapse
|
13
|
Di Maiolo F, Painelli A. Dynamical disorder and resonance energy transfer: a novel quantum-classical approach. Phys Chem Chem Phys 2020; 22:1061-1068. [DOI: 10.1039/c9cp06038c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A novel quantum-classical approach demonstrates that dynamic disorder, as induced by a liquid polar solvent, boosts RET efficiency.
Collapse
Affiliation(s)
- F. Di Maiolo
- Department of Chemistry
- Life Science and Environmental Sustainability
- Università di Parma
- 43124 Parma
- Italy
| | - A. Painelli
- Department of Chemistry
- Life Science and Environmental Sustainability
- Università di Parma
- 43124 Parma
- Italy
| |
Collapse
|
14
|
Palacino-González E, Gelin MF, Domcke W. Analysis of transient-absorption pump-probe signals of nonadiabatic dissipative systems: “Ideal” and “real” spectra. J Chem Phys 2019; 150:204102. [DOI: 10.1063/1.5094485] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - Maxim F. Gelin
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany
| | - Wolfgang Domcke
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany
| |
Collapse
|
15
|
Gelin MF, Palacino-González E, Chen L, Domcke W. Monitoring of Nonadiabatic Effects in Individual Chromophores by Femtosecond Double-Pump Single-Molecule Spectroscopy: A Model Study. Molecules 2019; 24:E231. [PMID: 30634541 PMCID: PMC6359062 DOI: 10.3390/molecules24020231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/01/2019] [Accepted: 01/07/2019] [Indexed: 12/03/2022] Open
Abstract
We explore, by theoretical modeling and computer simulations, how nonadiabatic couplings of excited electronic states of a polyatomic chromophore manifest themselves in single-molecule signals on femtosecond timescales. The chromophore is modeled as a system with three electronic states (the ground state and two non-adiabatically coupled excited states) and a Condon-active vibrational mode which, in turn, is coupled to a harmonic oscillator heat bath. For this system, we simulate double-pump single-molecule signals with fluorescence detection for different system-field interaction strengths, from the weak-coupling regime to the strong-coupling regime. While the signals are determined by the coherence of the electronic density matrix in the weak-coupling regime, they are determined by the populations of the electronic density matrix in the strong-coupling regime. As a consequence, the signals in the strong coupling regime allow the monitoring of nonadiabatic electronic population dynamics and are robust with respect to temporal inhomogeneity of the optical gap, while signals in the weak-coupling regime are sensitive to fluctuations of the optical gap and do not contain information on the electronic population dynamics.
Collapse
Affiliation(s)
- Maxim F Gelin
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany.
| | | | - Lipeng Chen
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany.
| | - Wolfgang Domcke
- Department of Chemistry, Technische Universität München, D-85747 Garching, Germany.
| |
Collapse
|
16
|
Anzola M, Di Maiolo F, Painelli A. Optical spectra of molecular aggregates and crystals: testing approximation schemes. Phys Chem Chem Phys 2019; 21:19816-19824. [DOI: 10.1039/c9cp03122g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The issue of the non-conservation of the oscillator strength in molecular aggregates is solved and several approximation schemes are validated.
Collapse
Affiliation(s)
- M. Anzola
- Department of Chemistry
- Life Science and Environmental Sustainability
- Università di Parma
- 43124 Parma
- Italy
| | - F. Di Maiolo
- Department of Chemistry
- Life Science and Environmental Sustainability
- Università di Parma
- 43124 Parma
- Italy
| | - A. Painelli
- Department of Chemistry
- Life Science and Environmental Sustainability
- Università di Parma
- 43124 Parma
- Italy
| |
Collapse
|