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Ileperuma CV, Garcés-Garcés J, Shao S, Fernández-Lázaro F, Sastre-Santos Á, Karr PA, D'Souza F. Panchromatic Light-Capturing Bis-styryl BODIPY-Perylenediimide Donor-Acceptor Constructs: Occurrence of Sequential Energy Transfer Followed by Electron Transfer. Chemistry 2023; 29:e202301686. [PMID: 37428999 DOI: 10.1002/chem.202301686] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/03/2023] [Accepted: 07/10/2023] [Indexed: 07/12/2023]
Abstract
Two wide-band-capturing donor-acceptor conjugates featuring bis-styrylBODIPY and perylenediimide (PDI) have been newly synthesized, and the occurrence of ultrafast excitation transfer from the 1 PDI* to BODIPY, and a subsequent electron transfer from the 1 BODIPY* to PDI have been demonstrated. Optical absorption studies revealed panchromatic light capture but offered no evidence of ground-state interactions between the donor and acceptor entities. Steady-state fluorescence and excitation spectral recordings provided evidence of singlet-singlet energy transfer in these dyads, and quenched fluorescence of bis-styrylBODIPY emission in the dyads suggested additional photo-events. The facile oxidation of bis-styrylBODIPY and facile reduction of PDI, establishing their relative roles of electron donor and acceptor, were borne out by electrochemical studies. The electrostatic potential surfaces of the S1 and S2 states, derived from time-dependent DFT calculations, supported excited charge transfer in these dyads. Spectro-electrochemical studies on one-electron-oxidized and one-electron-reduced dyads and the monomeric precursor compounds were also performed in a thin-layer optical cell under corresponding applied potentials. From this study, both bis-styrylBODIPY⋅+ and PDI⋅- could be spectrally characterizes and were subsequently used in characterizing the electron-transfer products. Finally, pump-probe spectral studies were performed in dichlorobenzene under selective PDI and bis-styrylBODIPY excitation to secure energy and electron-transfer evidence. The measured rate constants for energy transfer, kENT , were in the range of 1011 s-1 , while the electron transfer rate constants, kET , were in the range of 1010 s-1 , thus highlighting their potential use in solar energy harvesting and optoelectronic applications.
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Affiliation(s)
- Chamari V Ileperuma
- Department of Chemistry, University of North Texas at Denton, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA
| | - José Garcés-Garcés
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03203, Elche, Spain
| | - Shuai Shao
- Department of Chemistry, University of North Texas at Denton, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA
| | - Fernando Fernández-Lázaro
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03203, Elche, Spain
| | - Ángela Sastre-Santos
- Área de Química Orgánica, Instituto de Bioingeniería, Universidad Miguel Hernández, Avda. de la Universidad s/n, 03203, Elche, Spain
| | - Paul A Karr
- Department of Physical Sciences and Mathematics, Wayne State College, 111 Main Street, Wayne, Nebraska, 68787, USA
| | - Francis D'Souza
- Department of Chemistry, University of North Texas at Denton, 1155 Union Circle, #305070, Denton, TX 76203-5017, USA
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2
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Barcza B, Szirmai Á, Tajti A, Stanton JF, Szalay PG. Benchmarking Aspects of Ab Initio Fragment Models for Accurate Excimer Potential Energy Surfaces. J Chem Theory Comput 2023; 19:3580-3600. [PMID: 37236166 PMCID: PMC10694823 DOI: 10.1021/acs.jctc.3c00104] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Indexed: 05/28/2023]
Abstract
While Coupled-Cluster methods have been proven to provide an accurate description of excited electronic states, the scaling of the computational costs with the system size limits the degree for which these methods can be applied. In this work different aspects of fragment-based approaches are studied on noncovalently bound molecular complexes with interacting chromophores of the fragments, such as π-stacked nucleobases. The interaction of the fragments is considered at two distinct steps. First, the states localized on the fragments are described in the presence of the other fragment(s); for this we test two approaches. One method is founded on QM/MM principles, only including the electrostatic interaction between the fragments in the electronic structure calculation with Pauli repulsion and dispersion effects added separately. The other model, a Projection-based Embedding (PbE) using the Huzinaga equation, includes both electrostatic and Pauli repulsion and only needs to be augmented by dispersion interactions. In both schemes the extended Effective Fragment Potential (EFP2) method of Gordon et al. was found to provide an adequate correction for the missing terms. In the second step, the interaction of the localized chromophores is modeled for a proper description of the excitonic coupling. Here the inclusion of purely electrostatic contributions appears to be sufficient: it is found that the Coulomb part of the coupling provides accurate splitting of the energies of interacting chromophores that are separated by more than 4 Å.
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Affiliation(s)
- Bónis Barcza
- Laboratory
of Theoretical Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, P.O. Box 32, H-1117 Budapest, Hungary
- György
Hevesy Doctoral School, Institute of Chemistry, ELTE Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Ádám
B. Szirmai
- Laboratory
of Theoretical Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, P.O. Box 32, H-1117 Budapest, Hungary
- György
Hevesy Doctoral School, Institute of Chemistry, ELTE Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Attila Tajti
- Laboratory
of Theoretical Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, P.O. Box 32, H-1117 Budapest, Hungary
| | - John F. Stanton
- Quantum
Theory Project, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Péter G. Szalay
- Laboratory
of Theoretical Chemistry, Institute of Chemistry, ELTE Eötvös Loránd University, P.O. Box 32, H-1117 Budapest, Hungary
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3
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Kaiser A, Daoud RE, Aquilante F, Kühn O, De Vico L, Bokarev SI. A Multiconfigurational Wave Function Implementation of the Frenkel Exciton Model for Molecular Aggregates. J Chem Theory Comput 2023; 19:2918-2928. [PMID: 37115036 DOI: 10.1021/acs.jctc.3c00185] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
We present an implementation of the Frenkel exciton model into the OpenMolcas program package enabling calculations of collective electronic excited states of molecular aggregates based on a multiconfigurational wave function description of the individual monomers. The computational protocol avoids using diabatization schemes and, thus, supermolecule calculations. Additionally, the use of the Cholesky decomposition of the two-electron integrals entering pair interactions enhances the efficiency of the computational scheme. The application of the method is exemplified for two test systems, that is, a formaldehyde oxime and a bacteriochlorophyll-like dimer. For the sake of comparison with the dipole approximation, we restrict our considerations to situations where intermonomer exchange can be neglected. The protocol is expected to be beneficial for aggregates composed of molecules with extended π systems, unpaired electrons such as radicals or transition metal centers, where it should outperform widely used methods based on time-dependent density functional theory.
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Affiliation(s)
- Andy Kaiser
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock. Germany
| | - Razan E Daoud
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Francesco Aquilante
- Theory and Simulation of Materials (THEOS) and National Centre for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Oliver Kühn
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock. Germany
| | - Luca De Vico
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Sergey I Bokarev
- Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18059 Rostock. Germany
- Chemistry Department, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
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4
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Hauschildt SJ, Wu Z, Uersfeld D, Schmid P, Götz C, Engel V, Engels B, Müllen K, Basché T. Excitation localization in a trimeric perylenediimide macrocycle: Synthesis, theory, and single molecule spectroscopy. J Chem Phys 2022; 156:044304. [DOI: 10.1063/5.0077676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Simon J. Hauschildt
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Zehua Wu
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Daniel Uersfeld
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Paul Schmid
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - Christian Götz
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Volker Engel
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - Klaus Müllen
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Thomas Basché
- Department of Chemistry, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany
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Fujimoto KJ. Electronic Couplings and Electrostatic Interactions Behind the Light Absorption of Retinal Proteins. Front Mol Biosci 2021; 8:752700. [PMID: 34604313 PMCID: PMC8480471 DOI: 10.3389/fmolb.2021.752700] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 09/02/2021] [Indexed: 11/13/2022] Open
Abstract
The photo-functional chromophore retinal exhibits a wide variety of optical absorption properties depending on its intermolecular interactions with surrounding proteins and other chromophores. By utilizing these properties, microbial and animal rhodopsins express biological functions such as ion-transport and signal transduction. In this review, we present the molecular mechanisms underlying light absorption in rhodopsins, as revealed by quantum chemical calculations. Here, symmetry-adapted cluster-configuration interaction (SAC-CI), combined quantum mechanical and molecular mechanical (QM/MM), and transition-density-fragment interaction (TDFI) methods are used to describe the electronic structure of the retinal, the surrounding protein environment, and the electronic coupling between chromophores, respectively. These computational approaches provide successful reproductions of experimentally observed absorption and circular dichroism (CD) spectra, as well as insights into the mechanisms of unique optical properties in terms of chromophore-protein electrostatic interactions and chromophore-chromophore electronic couplings. On the basis of the molecular mechanisms revealed in these studies, we also discuss strategies for artificial design of the optical absorption properties of rhodopsins.
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Affiliation(s)
- Kazuhiro J Fujimoto
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Nagoya, Japan.,Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Japan
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6
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Fujimoto KJ, Minoda T, Yanai T. Spectral Tuning Mechanism of Photosynthetic Light-Harvesting Complex II Revealed by Ab Initio Dimer Exciton Model. J Phys Chem B 2021; 125:10459-10470. [PMID: 34521196 DOI: 10.1021/acs.jpcb.1c04457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Excited states of two kinds of bacteriochlorophyll (BChl) aggregates, B850 and B800, in photosynthetic light-harvesting complex II (LH2) are theoretically investigated by developing and using an extended exciton model considering efficiently evaluated excitonic coupling. Our exciton model based on dimer fragmentation is shown to reproduce the experimental absorption spectrum of LH2 with good accuracy, entailing their different redshifts originating from aggregations of B850 and B800. The systematic analysis has been performed on the spectra by quantitatively decomposing their spectral shift energies into the contributions of various effects: structural distortion, electrostatic, excitonic coupling, and charge-transfer (CT) effects. Our results show that the spectral redshift of B800 is mainly attributed to its electrostatic interaction with the protein environment, while that of B850 arises from the marked effect of the excitonic coupling between BChl units. The interchromophore CT excitation also plays a key role in the spectral redshift of B850. This CT effect can be effectively described using our dimer model. This suited characterization reveals that the pronounced CT effect originates from the characteristics of B850 that has closely spaced BChls as dimers. We highlight the importance of the refinement of the crystal structure with the use of quantum chemical methods for prediction of the spectrum.
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Affiliation(s)
- Kazuhiro J Fujimoto
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furocho, Chikusa, Nagoya, 464-8601, Japan.,Department of Chemistry, Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya, 464-8601, Japan
| | - Takumi Minoda
- Department of Chemistry, Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya, 464-8601, Japan
| | - Takeshi Yanai
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furocho, Chikusa, Nagoya, 464-8601, Japan.,Department of Chemistry, Graduate School of Science, Nagoya University, Furocho, Chikusa, Nagoya, 464-8601, Japan
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7
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Osella S. Artificial Photosynthesis: Is Computation Ready for the Challenge Ahead? NANOMATERIALS 2021; 11:nano11020299. [PMID: 33498961 PMCID: PMC7911014 DOI: 10.3390/nano11020299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/13/2022]
Abstract
A tremendous effort is currently devoted to the generation of novel hybrid materials with enhanced electronic properties for the creation of artificial photosynthetic systems. This compelling and challenging problem is well-defined from an experimental point of view, as the design of such materials relies on combining organic materials or metals with biological systems like light harvesting and redox-active proteins. Such hybrid systems can be used, e.g., as bio-sensors, bio-fuel cells, biohybrid photoelectrochemical cells, and nanostructured photoelectronic devices. Despite these efforts, the main bottleneck is the formation of efficient interfaces between the biological and the organic/metal counterparts for efficient electron transfer (ET). It is within this aspect that computation can make the difference and improve the current understanding of the mechanisms underneath the interface formation and the charge transfer efficiency. Yet, the systems considered (i.e., light harvesting protein, self-assembly monolayer and surface assembly) are more and more complex, reaching (and often passing) the limit of current computation power. In this review, recent developments in computational methods for studying complex interfaces for artificial photosynthesis will be provided and selected cases discussed, to assess the inherent ability of computation to leave a mark in this field of research.
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Affiliation(s)
- Silvio Osella
- Chemical and Biological Systems Simulation Lab, Center of New Technologies, University of Warsaw, Banacha 2C, 02-097 Warsaw, Poland
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8
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Yang L, Jang SJ. Theoretical investigation of non-Förster exciton transfer mechanisms in perylene diimide donor, phenylene bridge, and terrylene diimide acceptor systems. J Chem Phys 2020; 153:144305. [PMID: 33086841 DOI: 10.1063/5.0023709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The rates of exciton transfer within dyads of perylene diimide and terrylene diimide connected by oligophenylene bridge units have been shown to deviate significantly from those of Förster's resonance energy transfer theory, according to single molecule spectroscopy experiments. The present work provides a detailed computational and theoretical study investigating the source of such a discrepancy. Electronic spectroscopy data are calculated by time-dependent density functional theory and then compared with experimental results. Electronic couplings between the exciton donor and the acceptor are estimated based on both the transition density cube method and transition dipole approximation. These results confirm that the delocalization of the exciton to the bridge parts contributes to significant enhancement of donor-acceptor electronic coupling. Mechanistic details of exciton transfer are examined by estimating the contributions of the bridge electronic states, vibrational modes of the dyads commonly coupled to both donor and acceptor, inelastic resonance energy transfer mechanism, and dark exciton states. These analyses suggest that the contribution of common vibrational modes serves as the main source of deviation from Förster's spectral overlap expression.
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Affiliation(s)
- Lei Yang
- Center for Molecular Systems and Organic Devices, Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Seogjoo J Jang
- Department of Chemistry and Biochemistry, Queens College, City University of New York, 65-30 Kissena Boulevard, Queens, New York 11367, USA and PhD Programs in Chemistry and Physics, and Initiative for the Theoretical Sciences, Graduate Center, City University of New York, 365 Fifth Avenue, New York, New York 10016, USA
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9
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Fujimoto KJ, Inoue K. Excitonic coupling effect on the circular dichroism spectrum of sodium-pumping rhodopsin KR2. J Chem Phys 2020; 153:045101. [DOI: 10.1063/5.0013642] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Kazuhiro J. Fujimoto
- Institute of Transformative Bio-Molecules (WPI-ITbM), Nagoya University, Furocho, Chikusa, Nagoya 464-8601, Japan
| | - Keiichi Inoue
- The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan
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10
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Symalla F, Heidrich S, Friederich P, Strunk T, Neumann T, Minami D, Jeong D, Wenzel W. Multiscale Simulation of Photoluminescence Quenching in Phosphorescent OLED Materials. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.201900222] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Franz Symalla
- Nanomatch GmbHHermann‐von‐Helmholtz‐Platz 1 Bau 640 76344 Eggenstein‐Leopoldshafen Germany
| | - Shahriar Heidrich
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Pascal Friederich
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
| | - Timo Strunk
- Nanomatch GmbHHermann‐von‐Helmholtz‐Platz 1 Bau 640 76344 Eggenstein‐Leopoldshafen Germany
| | - Tobias Neumann
- Nanomatch GmbHHermann‐von‐Helmholtz‐Platz 1 Bau 640 76344 Eggenstein‐Leopoldshafen Germany
| | - Daiki Minami
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd. 130 Samsung‐ro, Yeongtong‐gu Suwon‐si Gyeonggi‐do 16678 Republic of Korea
| | - Daun Jeong
- Samsung Advanced Institute of TechnologySamsung Electronics Co. Ltd. 130 Samsung‐ro, Yeongtong‐gu Suwon‐si Gyeonggi‐do 16678 Republic of Korea
| | - Wolfgang Wenzel
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT) Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany
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11
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Hofmann FJ, Bodnarchuk MI, Dirin DN, Vogelsang J, Kovalenko MV, Lupton JM. Energy Transfer from Perovskite Nanocrystals to Dye Molecules Does Not Occur by FRET. NANO LETTERS 2019; 19:8896-8902. [PMID: 31646869 DOI: 10.1021/acs.nanolett.9b03779] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Single formamidinium lead bromide (FAPbBr3) perovskite nanocubes, approximately 10 nm in size, have extinction cross sections orders of magnitude larger than single dye molecules and can therefore be used to photoexcite one single dye molecule within their immediate vicinity by means of excitation-energy transfer (EET). The rate of photon emission by the single dye molecule is increased by 2 orders of magnitude under excitation by EET compared to direct excitation at the same laser fluence. Because the dye cannot accommodate biexcitons, NC biexcitons are filtered out by EET, giving rise to up to an order-of-magnitude improvement in the fidelity of photon antibunching. We demonstrate here that, contrary to expectation, energy transfer from the nanocrystal to dye molecules does not depend on the spectral line widths of the donor and acceptor and is therefore not governed by Förster's theory of resonance energy transfer (FRET). Two different cyanine dye acceptors with substantially different spectral overlaps with the nanocrystal donor show a similar light-harvesting capability. Cooling the sample from room temperature to 5 K reduces the average transition line widths 25-fold but has no apparent effect on the number of molecules emitting, i.e., on the spatial density of single dye molecules being photoexcited by single nanocrystals. Narrow zero-phonon lines are identified for both donor and acceptor, with an energetic separation of over 40 times the line width, implying a complete absence of spectral overlap-even though EET is evident. Both donor and acceptor exhibit spectral fluctuations, but no correlation is apparent between the jitter, which controls spectral overlap, and the overall light harvesting. We conclude that the energy transfer process is fundamentally nonresonant, implying effective energy dissipation in the perovskite donor because of strong electron-phonon coupling of the carriers comprising the exciton. The work highlights the importance of performing cryogenic spectroscopy to reveal the underlying mechanisms of energy transfer in complex donor-acceptor systems.
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Affiliation(s)
- Felix J Hofmann
- Institut für Experimentelle und Angewandte Physik , Universität Regensburg , Universitätsstraße 31 , 93053 Regensburg , Germany
| | - Maryna I Bodnarchuk
- ETH Zürich , Department of Chemistry and Applied Biosciences , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstr. 129 , CH-8600 Dübendorf , Switzerland
| | - Dmitry N Dirin
- ETH Zürich , Department of Chemistry and Applied Biosciences , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstr. 129 , CH-8600 Dübendorf , Switzerland
| | - Jan Vogelsang
- Institut für Experimentelle und Angewandte Physik , Universität Regensburg , Universitätsstraße 31 , 93053 Regensburg , Germany
| | - Maksym V Kovalenko
- ETH Zürich , Department of Chemistry and Applied Biosciences , Vladimir Prelog Weg 1 , CH-8093 Zürich , Switzerland
- Empa - Swiss Federal Laboratories for Materials Science and Technology, Überlandstr. 129 , CH-8600 Dübendorf , Switzerland
| | - John M Lupton
- Institut für Experimentelle und Angewandte Physik , Universität Regensburg , Universitätsstraße 31 , 93053 Regensburg , Germany
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12
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Influence of triplet states on single donor-acceptor pair fluorescence. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.110401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Goswami S, Kopec S, Köppel H. Vibronic Coupling and Excitation Transfer in Hydrogen-Bonded Molecular Dimers: A Quantum Dynamical Analysis. J Phys Chem A 2019; 123:5491-5503. [DOI: 10.1021/acs.jpca.9b04903] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sugata Goswami
- Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Sabine Kopec
- Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
| | - Horst Köppel
- Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany
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14
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Leng X, Jin F, Wei M, Ma H, Feng J, Ma Y. Electronic energy transfer studied by many-body Green’s function theory. J Chem Phys 2019; 150:164107. [DOI: 10.1063/1.5066290] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Xia Leng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Fan Jin
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Min Wei
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Huizhong Ma
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Jin Feng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yuchen Ma
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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15
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Jang SJ. Robust and Fragile Quantum Effects in the Transfer Kinetics of Delocalized Excitons between B850 Units of LH2 Complexes. J Phys Chem Lett 2018; 9:6576-6583. [PMID: 30383380 DOI: 10.1021/acs.jpclett.8b02641] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Aggregates of light harvesting 2 (LH2) complexes form the major exciton-relaying domain in the photosynthetic unit of purple bacteria. Application of a generalized master equation to pairs of the B850 units of LH2 complexes, where excitons predominantly reside, provides quantitative information on how the inter-LH2 exciton transfer depends on the distance, relative rotational angle, and the relative energies of the two LH2s. The distance dependence demonstrates significant enhancement of the rate due to quantum delocalization of excitons, the qualitative nature of which remains robust against the disorder. The angle dependence reflects isotropic nature of exciton transfer, which remains similar for the ensemble of disorder. The variation of the rate on relative excitation energies of LH2 exhibits resonance peaks, which, however, is fragile as the disorder becomes significant. Overall, the average transfer times between two LH2s are estimated to be in the range of 4-25 ps for physically plausible inter-LH2 distances.
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Affiliation(s)
- Seogjoo J Jang
- Department of Chemistry and Biochemistry , Queens College, City University of New York , 65-30 Kissena Boulevard , Queens , New York 11367 , United States
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16
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Liu W, Canola S, Köhn A, Engels B, Negri F, Fink RF. A model hamiltonian tuned toward high level ab initio
calculations to describe the character of excitonic states in perylenebisimide aggregates. J Comput Chem 2018; 39:1979-1989. [DOI: 10.1002/jcc.25374] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 05/16/2018] [Accepted: 05/18/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Wenlan Liu
- Chongqing Key Laboratory of Green Synthesis and Applications & College of Chemistry; Chongqing Normal University; Chongqing 401331 China
- Institute of Theoretical Chemistry; University of Stuttgart; Pfaffenwaldring 55, 70569 Stuttgart Germany
- Institute of Physical and Theoretical Chemistry, Auf der Morgenstelle 18; University of Tübingen; 72076 Tübingen Germany
| | - Sofia Canola
- Institute of Physical and Theoretical Chemistry, Auf der Morgenstelle 18; University of Tübingen; 72076 Tübingen Germany
- Universitá di Bologna Dipartimento di Chimica 'G. Ciamician'; Via F. Selmi 2, Bologna 40126 Italy
| | - Andreas Köhn
- Institute of Theoretical Chemistry; University of Stuttgart; Pfaffenwaldring 55, 70569 Stuttgart Germany
| | - Bernd Engels
- Institute of Physical and Theoretical Chemistry, Emil-Fischer-Str. 42; University of Würzburg; 97074 Würzburg Germany
| | - Fabrizia Negri
- Universitá di Bologna Dipartimento di Chimica 'G. Ciamician'; Via F. Selmi 2, Bologna 40126 Italy
| | - Reinhold F. Fink
- Institute of Physical and Theoretical Chemistry, Auf der Morgenstelle 18; University of Tübingen; 72076 Tübingen Germany
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17
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Cupellini L, Corbella M, Mennucci B, Curutchet C. Electronic energy transfer in biomacromolecules. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1392] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lorenzo Cupellini
- Dipartimento di Chimica e Chimica Industriale University of Pisa Pisa Italy
| | - Marina Corbella
- Departament de Farmàcia i Tecnologia Farmacèutica i Fisicoquímica and Institut de Química Teòrica i Computacional (IQTC‐UB), Facultat de Farmàcia i Ciències de l'Alimentació Universitat de Barcelona Barcelona Spain
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale University of Pisa Pisa Italy
| | - Carles Curutchet
- Departament de Farmàcia i Tecnologia Farmacèutica i Fisicoquímica and Institut de Química Teòrica i Computacional (IQTC‐UB), Facultat de Farmàcia i Ciències de l'Alimentació Universitat de Barcelona Barcelona Spain
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18
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Plötz PA, Megow J, Niehaus T, Kühn O. All-DFTB Approach to the Parametrization of the System-Bath Hamiltonian Describing Exciton-Vibrational Dynamics of Molecular Assemblies. J Chem Theory Comput 2018; 14:5001-5010. [PMID: 30141929 DOI: 10.1021/acs.jctc.8b00493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Spectral density functions are central to the simulation of complex many body systems. Their determination requires making approximations not only to the dynamics but also to the underlying electronic structure theory. Here, blending different methods bears the danger of an inconsistent description. To solve this issue we propose an all-DFTB approach to determine spectral densities for the description of Frenkel excitons in molecular assemblies. The protocol is illustrated for a model of a PTCDI crystal, which involves the calculation of monomeric excitation energies and Coulomb couplings between monomer transitions, as well as their spectral distributions due to thermal fluctuations of the nuclei. Using dynamically defined normal modes, a mapping onto the standard harmonic oscillator spectral densities is achieved.
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Affiliation(s)
- Per-Arno Plötz
- Institut für Physik , Universität Rostock , Albert-Einstein-Strasse 23-24 , 18059 Rostock , Germany
| | - Jörg Megow
- Institut für Chemie , Universität Potsdam , Karl-Liebknecht-Strasse 24-25 , 14476 Potsdam , Germany
| | - Thomas Niehaus
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne , France
| | - Oliver Kühn
- Institut für Physik , Universität Rostock , Albert-Einstein-Strasse 23-24 , 18059 Rostock , Germany
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19
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Fihey A, Russo R, Cupellini L, Jacquemin D, Mennucci B. Is energy transfer limiting multiphotochromism? answers from ab initio quantifications. Phys Chem Chem Phys 2018; 19:2044-2052. [PMID: 28009859 DOI: 10.1039/c6cp07458h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dithienylethenes (DTEs) can be assembled to form supramolecular multiphotochromic systems that are highly functional molecular architectures of potential interest for building complex optoelectronic devices. Yet even simple DTE dimers relying on an organic linker may suffer from a partial photoactivity, i.e., only one of the two switches does isomerise. Experimentally, this limited photochromism has been attributed to an excited state energy transfer (EET) between the two DTEs of the multimer; this EET taking place instead of the desired photoinduced cyclisation of the DTE. However, no clear evidences of this phenomenon have been provided so far. In this work we propose the first rationalisation of this potential parasite photoinduced event using a computational approach based on Time-Dependent Density Functional Theory (TD-DFT) for the calculation of the electronic coupling in DTE dimers. Besides quantifying EET in several systems, we dissect the role of through-bond and through-space mechanisms on this process and clarify their dependence on both the nature and length of the bridge separating the two photochromes. The theoretical data obtained in this framework are in full agreement with the experimental outcomes and pave the way toward a molecular design of coupled, yet fully functionals, DTE-based multiswitches.
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Affiliation(s)
- Arnaud Fihey
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes1, 263 Av. du Général Leclerc, 35042, Cedex Rennes, France. and CEISAM, UMR CNRS 6230, Université de Nantes, 2, Rue de la Houssinière, BP 92208, 44322 Nantes, Cedex 3, France.
| | - Roberto Russo
- Dipartimento di Chimica e Chimica Industriale, Universitá di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy.
| | - Lorenzo Cupellini
- Dipartimento di Chimica e Chimica Industriale, Universitá di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy.
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230, Université de Nantes, 2, Rue de la Houssinière, BP 92208, 44322 Nantes, Cedex 3, France. and Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 5, France
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, Universitá di Pisa, via G. Moruzzi 13, 56124 Pisa, Italy.
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20
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Bellinger D, Pflaum J, Brüning C, Engel V, Engels B. The electronic character of PTCDA thin films in comparison to other perylene-based organic semi-conductors: ab initio-, TD-DFT and semi-empirical computations of the opto-electronic properties of large aggregates. Phys Chem Chem Phys 2018; 19:2434-2448. [PMID: 28058427 DOI: 10.1039/c6cp07673d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Perylene-based compounds are promising materials for opto-electronic thin film devices but despite intense investigations, important details of their electronic structure are still under debate. For perylene-3,4,9,10-tetracarboxylic dianhydrid (PTCDA), the theoretical models predict a different relative energetic order of Frenkel and Charge Transfer (CT) states. Additionally, while one model indicates strong differences between PTCDA on one hand and other perylene-based compounds on the other, recent ab initio computations indicate electronic properties of all perylene-based compounds to resemble each other. Finally, the models disagree about the amount of mixing between CT and Frenkel states. Definitive answers to these questions are difficult because the approaches use various approximations. Up to date, the ab initio based methods employ rather small model systems and neglect environmental effects. In the present work, we improve our former approach by analyzing the effects of the various simplifications. In more detail, we increase the size of the model systems, include environmental effects and investigate the influence of exciton-phonon couplings on the absorption spectrum. The computations for larger aggregates were performed with the ZINDO/S approach, because benchmark computations show that it provides accurate vertical excitation energies for Frenkel, as well as CT states.
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Affiliation(s)
- Daniel Bellinger
- Institut für Phys. und Theor. Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany.
| | - Jens Pflaum
- Institut für Experimentelle Physik VI, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany and ZAE Bayern e.V., Magdalena-Schoch-Str. 3, 97074 Würzburg, Germany
| | - Christoph Brüning
- Institut für Phys. und Theor. Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany.
| | - Volker Engel
- Institut für Phys. und Theor. Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany.
| | - Bernd Engels
- Institut für Phys. und Theor. Chemie, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany.
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21
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Fujimoto KJ, Balashov SP. Vibronic coupling effect on circular dichroism spectrum: Carotenoid–retinal interaction in xanthorhodopsin. J Chem Phys 2017. [DOI: 10.1063/1.4977045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Kazuhiro J. Fujimoto
- Faculty of Pharmaceutical Sciences, Hokuriku University, Ho-3 Kanagawa-machi, Kanazawa 920-1181, Japan
| | - Sergei P. Balashov
- Department of Physiology and Biophysics, University of California, Irvine, California 92697, USA
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22
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Plötz PA, Megow J, Niehaus T, Kühn O. Spectral densities for Frenkel exciton dynamics in molecular crystals: A TD-DFTB approach. J Chem Phys 2017; 146:084112. [DOI: 10.1063/1.4976625] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Per-Arno Plötz
- Institut für Physik, Universität Rostock, Albert Einstein Strasse 23-24, D-18059 Rostock, Germany
| | - Jörg Megow
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, D-14476 Potsdam, Germany
| | - Thomas Niehaus
- Institut Lumière Matière, Université Lyon, Université Claude Bernard Lyon 1, CNRS, F-69622 Villeurbanne, France
| | - Oliver Kühn
- Institut für Physik, Universität Rostock, Albert Einstein Strasse 23-24, D-18059 Rostock, Germany
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23
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Spiegel JD, Lyskov I, Kleinschmidt M, Marian CM. Charge-transfer contributions to the excitonic coupling matrix element in BODIPY-based energy transfer cassettes. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2016.10.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Stehr V, Fink RF, Deibel C, Engels B. Charge carrier mobilities in organic semiconductor crystals based on the spectral overlap. J Comput Chem 2016; 37:2146-56. [DOI: 10.1002/jcc.24441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 06/10/2016] [Accepted: 06/13/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Vera Stehr
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg; Würzburg 97074 Germany
| | - Reinhold F. Fink
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen; Tübingen 72076 Germany
| | - Carsten Deibel
- Institut für Physik, Technische Universität Chemnitz; Chemnitz 09126 Germany
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg; Würzburg 97074 Germany
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25
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Abstract
The design of optimal light-harvesting (supra)molecular systems and materials is one of the most challenging frontiers of science. Theoretical methods and computational models play a fundamental role in this difficult task, as they allow the establishment of structural blueprints inspired by natural photosynthetic organisms that can be applied to the design of novel artificial light-harvesting devices. Among theoretical strategies, the application of quantum chemical tools represents an important reality that has already reached an evident degree of maturity, although it still has to show its real potentials. This Review presents an overview of the state of the art of this strategy, showing the actual fields of applicability but also indicating its current limitations, which need to be solved in future developments.
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Affiliation(s)
- Carles Curutchet
- Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona , Av. Joan XXIII s/n, 08028 Barcelona, Spain
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, University of Pisa , via G. Moruzzi 13, 56124 Pisa, Italy
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26
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Höfener S, Visscher L. Wave Function Frozen-Density Embedding: Coupled Excitations. J Chem Theory Comput 2016; 12:549-57. [DOI: 10.1021/acs.jctc.5b00821] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sebastian Höfener
- Amsterdam Center for Multiscale
Modelling (ACMM), VU University Amsterdam, Theoretical Chemistry Section, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Lucas Visscher
- Amsterdam Center for Multiscale
Modelling (ACMM), VU University Amsterdam, Theoretical Chemistry Section, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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27
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Kenny EP, Kassal I. Benchmarking Calculations of Excitonic Couplings between Bacteriochlorophylls. J Phys Chem B 2015; 120:25-32. [DOI: 10.1021/acs.jpcb.5b08817] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elise P. Kenny
- Centre
for Engineered Quantum
Systems, Centre for Quantum Computation and Communication Technology,
and School of Mathematics and Physics, The University of Queensland, Brisbane QLD 4072, Australia
| | - Ivan Kassal
- Centre
for Engineered Quantum
Systems, Centre for Quantum Computation and Communication Technology,
and School of Mathematics and Physics, The University of Queensland, Brisbane QLD 4072, Australia
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28
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Caricato M, Curutchet C, Mennucci B, Scalmani G. Electronic Couplings for Resonance Energy Transfer from CCSD Calculations: From Isolated to Solvated Systems. J Chem Theory Comput 2015; 11:5219-28. [DOI: 10.1021/acs.jctc.5b00720] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marco Caricato
- Department
of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Carles Curutchet
- Departament
de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s/n, 08028 Barcelona, Spain
| | - Benedetta Mennucci
- Dipartimento
di Chimica e Chimica Industriale, University of Pisa, via G. Moruzzi
3, 56124 Pisa, Italy
| | - Giovanni Scalmani
- Gaussian, Inc., 340 Quinnipiac
Street, Building 40, Wallingford, Connecticut 06492, United States
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29
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Liu W, Lunkenheimer B, Settels V, Engels B, Fink RF, Köhn A. A general ansatz for constructing quasi-diabatic states in electronically excited aggregated systems. J Chem Phys 2015; 143:084106. [DOI: 10.1063/1.4929352] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Affiliation(s)
- Wenlan Liu
- Institute for Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
- InnovationLab GmbH, Speyerer St. 4, D-69115 Heidelberg, Germany
| | - Bernd Lunkenheimer
- InnovationLab GmbH, Speyerer St. 4, D-69115 Heidelberg, Germany
- Institute of Physical Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Volker Settels
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Emil-Fischer-St. 42, D-97074 Würzburg, Germany
| | - Bernd Engels
- Institute of Physical and Theoretical Chemistry, University of Würzburg, Emil-Fischer-St. 42, D-97074 Würzburg, Germany
| | - Reinhold F. Fink
- Institute of Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany
| | - Andreas Köhn
- Institute for Theoretical Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
- InnovationLab GmbH, Speyerer St. 4, D-69115 Heidelberg, Germany
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30
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Osad'ko IS. Dependence of FRET efficiency on distance in single donor-acceptor pairs. J Chem Phys 2015; 142:125102. [PMID: 25833609 DOI: 10.1063/1.4915279] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Possibility to create single donor-acceptor (D-A) pairs by attaching dye molecules to various sites of DNA strands with control of the inter-dye distance R enables one to measure average Förster resonance energy transfer (FRET) efficiency E as a function of R. Triplet states of the dyes influence the dependence E(R) considerably. Two types of FRET efficiency are considered: E = EA and E = ED. The efficiency EA(R) = JA(R)/[JA(R) + JD(R)] depends on the donor and the acceptor average intensities JD(R) and JA(R) measured in D- and A-fluorescence, whereas the efficiency ED(R) = 1 - JD(R)/JD(∞) depends only on the intensity of D-fluorescence, so-called the donor quenching method. The shape of the functions ED (R) and EA (R) depends strongly on whether the dyes have blinking fluorescence. FRET efficiencies ED (R) and EA (R) undergo the influence of many experimental factors and therefore, differ considerably from pure FRET efficiencies ED (s) (R) and EA (s) (R). Pure FRET efficiencies ED,A (s) (R) are calculated with the help of rate equations for D-A pairs, whose molecules have triplet states. It is shown how the calculated efficiencies ED,A (s) (R) can be compared to FRET efficiencies measured with the help of the intensities ID,A(R) corrected by cross talk and background light.
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Affiliation(s)
- I S Osad'ko
- Institute for Spectroscopy, RAS, 142190 Moscow, Russia
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31
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Spiegel JD, Kleinschmidt M, Larbig A, Tatchen J, Marian CM. Quantum-Chemical Studies on Excitation Energy Transfer Processes in BODIPY-Based Donor-Acceptor Systems. J Chem Theory Comput 2015; 11:4316-27. [PMID: 26575926 DOI: 10.1021/acs.jctc.5b00501] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BODIPY-based excitation energy transfer (EET) cassettes are experimentally extensively studied and serve as excellent model systems for the investigation of photophysical processes, since they occur in any photosynthetic system and in organic photovoltaics. In the present work, the EET rates in five BODIPY-based EET cassettes in which anthracene serves as the donor have been determined, employing the monomer transition density approach (MTD) and the ideal dipole approximation (IDA). To this end, a new computer program has been devised that calculates the direct and exchange contributions to the excitonic coupling (EC) matrix element from transition density matrices generated by a combined density functional and multireference configuration interaction (DFT/MRCI) calculation for the monomers. EET rates have been calculated according to Fermi's Golden Rule from the EC and the spectral overlap, which was obtained from the calculated vibrationally resolved emission and absorption spectra of donor and acceptor, respectively. We find that the direct contribution to the EC matrix element is dominant in the studied EET cassettes. Furthermore, we show that the contribution of the molecular linker to the EET rate cannot be neglected. In our best fragment model, the molecular linker is attached to the donor moiety. For cassettes in which the transition dipole moments of donor and acceptor are oriented in parallel manner, our results confirm the experimental findings reported by Kim et al. [J. Phys. Chem. A 2006, 110, 20-27]. In cassettes with a perpendicular orientation of the donor and acceptor transition dipole moments, dynamic effects turn out to be important.
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Affiliation(s)
- J Dominik Spiegel
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf , Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Martin Kleinschmidt
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf , Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Alexander Larbig
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf , Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Jörg Tatchen
- Departamento de Química, Universidad de los Andes , Car. 1 No. 18A-12, Bogotá, Colombia
| | - Christel M Marian
- Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf , Universitätsstr. 1, D-40225 Düsseldorf, Germany
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32
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Kölle P, Pugliesi I, Langhals H, Wilcken R, Esterbauer AJ, de Vivie-Riedle R, Riedle E. Hole-transfer induced energy transfer in perylene diimide dyads with a donor–spacer–acceptor motif. Phys Chem Chem Phys 2015; 17:25061-72. [DOI: 10.1039/c5cp02981c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pump–probe spectroscopy, time resolved fluorescence, chemical variation and quantum chemical calculations reveal an efficient energy transfer mechanism enabled by a bright charge transfer state located on the spacer.
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Affiliation(s)
- Patrick Kölle
- Department of Chemistry
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
| | - Igor Pugliesi
- Lehrstuhl für BioMolekulare Optik
- Ludwig-Maximilians-Universität München
- 80538 München
- Germany
| | - Heinz Langhals
- Department of Chemistry
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
| | - Roland Wilcken
- Lehrstuhl für BioMolekulare Optik
- Ludwig-Maximilians-Universität München
- 80538 München
- Germany
| | | | | | - Eberhard Riedle
- Lehrstuhl für BioMolekulare Optik
- Ludwig-Maximilians-Universität München
- 80538 München
- Germany
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33
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Fujimoto KJ. Electronic coupling calculations with transition charges, dipoles, and quadrupoles derived from electrostatic potential fitting. J Chem Phys 2014; 141:214105. [DOI: 10.1063/1.4902758] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Kazuhiro J. Fujimoto
- Department of Computational Science, Graduate School of System Informatics, Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan
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34
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Settels V, Schubert A, Tafipolski M, Liu W, Stehr V, Topczak AK, Pflaum J, Deibel C, Fink RF, Engel V, Engels B. Identification of Ultrafast Relaxation Processes As a Major Reason for Inefficient Exciton Diffusion in Perylene-Based Organic Semiconductors. J Am Chem Soc 2014; 136:9327-37. [DOI: 10.1021/ja413115h] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Volker Settels
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Alexander Schubert
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Maxim Tafipolski
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Wenlan Liu
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Vera Stehr
- Lehrstuhl
für Experimentelle Physik VI, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Anna K. Topczak
- Lehrstuhl
für Experimentelle Physik VI, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- ZAE Bayern e.V., Am Galgenberg 87, 97074 Würzburg, Germany
| | - Jens Pflaum
- Lehrstuhl
für Experimentelle Physik VI, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
- ZAE Bayern e.V., Am Galgenberg 87, 97074 Würzburg, Germany
| | - Carsten Deibel
- Lehrstuhl
für Experimentelle Physik VI, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Reinhold F. Fink
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Volker Engel
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
| | - Bernd Engels
- Institut
für Physikalische und Theoretische Chemie, Universität Würzburg, Emil-Fischer-Str. 42, 97074 Würzburg, Germany
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35
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Plötz PA, Niehaus T, Kühn O. A new efficient method for calculation of Frenkel exciton parameters in molecular aggregates. J Chem Phys 2014; 140:174101. [DOI: 10.1063/1.4871658] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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36
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Caprasecca S, Mennucci B. Excitation Energy Transfer in Donor-Bridge-Acceptor Systems: A Combined Quantum-Mechanical/Classical Analysis of the Role of the Bridge and the Solvent. J Phys Chem A 2014; 118:6484-91. [DOI: 10.1021/jp502815r] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Stefano Caprasecca
- Dipartimento di Chimica e
Chimica Industriale, University of Pisa, Via Risorgimento 35, 56126 Pisa, Italy
| | - Benedetta Mennucci
- Dipartimento di Chimica e
Chimica Industriale, University of Pisa, Via Risorgimento 35, 56126 Pisa, Italy
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37
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Stehr V, Fink RF, Engels B, Pflaum J, Deibel C. Singlet Exciton Diffusion in Organic Crystals Based on Marcus Transfer Rates. J Chem Theory Comput 2014; 10:1242-55. [DOI: 10.1021/ct500014h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vera Stehr
- Physikalisches Institut, Universität Würzburg, 97074 Würzburg, Germany
| | - Reinhold F. Fink
- Institut
für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | - Bernd Engels
- Institut für Physikalische und Theoretische Chemie, Universität Würzburg, 97074 Würzburg, Germany
| | - Jens Pflaum
- Physikalisches Institut, Universität Würzburg, 97074 Würzburg, Germany
| | - Carsten Deibel
- Physikalisches Institut, Universität Würzburg, 97074 Würzburg, Germany
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38
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Diehl FP, Roos C, Duymaz A, Lunkenheimer B, Köhn A, Basché T. Emergence of Coherence through Variation of Intermolecular Distances in a Series of Molecular Dimers. J Phys Chem Lett 2014; 5:262-269. [PMID: 26270697 DOI: 10.1021/jz402512g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Quantum coherences between electronically excited molecules are a signature of entanglement and play an important role for energy transport in molecular assemblies. Here we monitor and analyze for a homologous series of molecular dimers embedded in a solid host the emergence of coherence with decreasing intermolecular distance by single-molecule spectroscopy and quantum chemistry. Coherent signatures appear as an enhancement of the purely electronic transitions in the dimers which is reflected by changes of fluorescence spectra and lifetimes. Effects that destroy the coherence are the coupling to the surroundings and to vibrational excitations. Complementary information is provided by excitation spectra from which the electronic coupling strengths were extracted and found to be in good agreement with calculated values. By revealing various signatures of intermolecular coherence, our results pave the way for the rational design of molecular systems with entangled states.
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Affiliation(s)
- Florian P Diehl
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Claudia Roos
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Adile Duymaz
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Bernd Lunkenheimer
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Andreas Köhn
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Thomas Basché
- Johannes Gutenberg-University, Institute of Physical Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
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39
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Scholz M, Holch F, Sauer C, Wiessner M, Schöll A, Reinert F. Core hole-electron correlation in coherently coupled molecules. PHYSICAL REVIEW LETTERS 2013; 111:048102. [PMID: 23931410 DOI: 10.1103/physrevlett.111.048102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Indexed: 06/02/2023]
Abstract
We study the core hole-electron correlation in coherently coupled molecules by energy dispersive near edge x-ray absorption fine-structure spectroscopy. In a transient phase, which exists during the transition between two bulk arrangements, 1,4,5,8-naphthalene-tetracarboxylicacid-dianhydride multilayer films exhibit peculiar changes of the line shape and energy position of the x-ray absorption signal at the C K-edge with respect to the bulk and gas phase spectra. By a comparison to a theoretical model based on a coupling of transition dipoles, which is established for optical absorption, we demonstrate that the observed spectroscopic differences can be explained by an intermolecular delocalized core hole-electron pair. By applying this model we can furthermore quantify the coherence length of the delocalized core exciton.
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Affiliation(s)
- M Scholz
- Experimentelle Physik VII and Röntgen Research Center for Complex Material Systems RCCM, Universität Würzburg, 97074 Würzburg, Germany.
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40
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Kim HN, Puhl L, Nolde F, Li C, Chen L, Basché T, Müllen K. Energy transfer at the single-molecule level: synthesis of a donor-acceptor dyad from perylene and terrylene diimides. Chemistry 2013; 19:9160-6. [PMID: 23780819 DOI: 10.1002/chem.201300439] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Indexed: 11/08/2022]
Abstract
In 2004, we reported single-pair fluorescence resonance energy transfer (spFRET), based on a perylene diimide (PDI) and terrylene diimide (TDI) dyad (1) that was bridged by a rigid substituted para-terphenyl spacer. Since then, several further single-molecule-level investigations on this specific compound have been performed. Herein, we focus on the synthesis of this dyad and the different approaches that can be employed. An optimized reaction pathway was chosen, considering the solubilities, reactivities, and accessibilities of the building blocks for each individual reaction whilst still using established synthetic techniques, including imidization, Suzuki coupling, and cyclization reactions. The key differentiating consideration in this approach to the synthesis of dyad 1 is the introduction of functional groups in a nonsymmetrical manner onto either the perylene diimide or the terrylene diimide by using imidization reactions. Combined with well-defined purification conditions, this modified approach allows dyad 1 to be obtained in reasonable quantities in good yield.
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Affiliation(s)
- Ha Na Kim
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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41
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Hablot D, Ziessel R, Alamiry MAH, Bahraidah E, Harriman A. Nanomechanical properties of molecular-scale bridges as visualised by intramolecular electronic energy transfer. Chem Sci 2013. [DOI: 10.1039/c2sc21505e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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42
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Yoo H, Furumaki S, Yang J, Lee JE, Chung H, Oba T, Kobayashi H, Rybtchinski B, Wilson TM, Wasielewski MR, Vacha M, Kim D. Excitonic Coupling in Linear and Trefoil Trimer Perylenediimide Molecules Probed by Single-Molecule Spectroscopy. J Phys Chem B 2012; 116:12878-86. [DOI: 10.1021/jp307394x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Hyejin Yoo
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Shu Furumaki
- Department of Organic and Polymeric
Materials, Tokyo Institute of Technology, Ookayama 2-12-1-S8, Meguro-ku, Tokyo 152-8552, Japan
| | - Jaesung Yang
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Ji-Eun Lee
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Heejae Chung
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Tatsuya Oba
- Department of Organic and Polymeric
Materials, Tokyo Institute of Technology, Ookayama 2-12-1-S8, Meguro-ku, Tokyo 152-8552, Japan
| | - Hiroyuki Kobayashi
- Department of Organic and Polymeric
Materials, Tokyo Institute of Technology, Ookayama 2-12-1-S8, Meguro-ku, Tokyo 152-8552, Japan
| | - Boris Rybtchinski
- Department of Chemistry and Argonne-Northwestern
Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Thea M. Wilson
- Department of Chemistry and Argonne-Northwestern
Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Michael R. Wasielewski
- Department of Chemistry and Argonne-Northwestern
Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Martin Vacha
- Department of Organic and Polymeric
Materials, Tokyo Institute of Technology, Ookayama 2-12-1-S8, Meguro-ku, Tokyo 152-8552, Japan
| | - Dongho Kim
- Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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43
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Caprasecca S, Curutchet C, Mennucci B. Toward a Unified Modeling of Environment and Bridge-Mediated Contributions to Electronic Energy Transfer: A Fully Polarizable QM/MM/PCM Approach. J Chem Theory Comput 2012; 8:4462-73. [DOI: 10.1021/ct300620w] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Stefano Caprasecca
- Dipartimento di Chimica e Chimica Industriale, University of Pisa,
Via Risorgimento 35, 56126 Pisa, Italy
| | - Carles Curutchet
- Departament de Fisicoquímica, Facultat de
Farmàcia, Universitat de Barcelona Av. Joan XXIII s/n, 08028
Barcelona, Spain
| | - Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, University of Pisa,
Via Risorgimento 35, 56126 Pisa, Italy
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44
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Fujimoto KJ. Transition-density-fragment interaction combined with transfer integral approach for excitation-energy transfer via charge-transfer states. J Chem Phys 2012; 137:034101. [DOI: 10.1063/1.4733669] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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45
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Osad'ko IS, Shchukina AL. Blinking fluorescence of single donor-acceptor pairs: important role of "dark'' states in resonance energy transfer via singlet levels. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 85:061907. [PMID: 23005127 DOI: 10.1103/physreve.85.061907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 03/23/2012] [Indexed: 06/01/2023]
Abstract
The influence of triplet levels on Förster resonance energy transfer via singlet levels in donor-acceptor (D-A) pairs is studied. Four types of D-A pair are considered: (i) two-level donor and two-level acceptor, (ii) three-level donor and two-level acceptor, (iii) two-level donor and three-level acceptor, and (iv) three-level donor and three-level acceptor. If singlet-triplet transitions in a three-level acceptor molecule are ineffective, the energy transfer efficiency E=I_{A}/(I_{A}+I_{D}), where I_{D} and I_{A} are the average intensities of donor and acceptor fluorescence, can be described by the simple theoretical equation E(F)=FT_{D}/(1+FT_{D}). Here F is the rate of energy transfer, and T_{D} is the donor fluorescence lifetime. In accordance with the last equation, 100% of the donor electronic energy can be transferred to an acceptor molecule at FT_{D}≫1. However, if singlet-triplet transitions in a three-level acceptor molecule are effective, the energy transfer efficiency is described by another theoretical equation, E(F)=F[over ¯](F)T_{D}/[1+F[over ¯](F)T_{D}]. Here F[over ¯](F) is a function of F depending on singlet-triplet transitions in both donor and acceptor molecules. Expressions for the functions F[over ¯](F) are derived. In this case the energy transfer efficiency will be far from 100% even at FT_{D}≫1. The character of the intensity fluctuations of donor and acceptor fluorescence indicates which of the two equations for E(F) should be used to find the value of the rate F. Therefore, random time instants of photon emission in both donor and acceptor fluorescence are calculated by the Monte Carlo method for all four types of D-A pair. Theoretical expressions for start-stop correlators (waiting time distributions) in donor and acceptor fluorescence are derived. The probabilities w_{N}^{D}(t) and w_{N}^{A}(t) of finding N photons of donor and acceptor fluorescence in the time interval t are calculated for various values of the energy transfer rate F and for all four types of D-A pair. Comparison of the calculated D and A fluorescence trajectories with those measured by Weiss and co-workers proves the important role of triplet levels in energy transfer via singlet levels.
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Affiliation(s)
- I S Osad'ko
- Institute for Spectroscopy, RAS, Troitsk, Russia
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46
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Heid CG, Ottiger P, Leist R, Leutwyler S. The S1/S2 exciton interaction in 2-pyridone·6-methyl-2-pyridone: Davydov splitting, vibronic coupling, and vibronic quenching. J Chem Phys 2012; 135:154311. [PMID: 22029317 DOI: 10.1063/1.3652759] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The excitonic splitting between the S(1) and S(2) electronic states of the doubly hydrogen-bonded dimer 2-pyridone[middle dot]6-methyl-2-pyridone (2PY·6M2PY) is studied in a supersonic jet, applying two-color resonant two-photon ionization (2C-R2PI), UV-UV depletion, and dispersed fluorescence spectroscopies. In contrast to the C(2h) symmetric (2-pyridone)(2) homodimer, in which the S(1) ← S(0) transition is symmetry-forbidden but the S(2) ← S(0) transition is allowed, the symmetry-breaking by the additional methyl group in 2PY·6M2PY leads to the appearance of both the S(1) and S(2) origins, which are separated by Δ(exp) = 154 cm(-1). When combined with the separation of the S(1) ← S(0) excitations of 6M2PY and 2PY, which is δ = 102 cm(-1), one obtains an S(1)/S(2) exciton coupling matrix element of V(AB, el) = 57 cm(-1) in a Frenkel-Davydov exciton model. The vibronic couplings in the S(1)/S(2) ← S(0) spectrum of 2PY·6M2PY are treated by the Fulton-Gouterman single-mode model. We consider independent couplings to the intramolecular 6a(') vibration and to the intermolecular σ(') stretch, and obtain a semi-quantitative fit to the observed spectrum. The dimensionless excitonic couplings are C(6a(')) = 0.15 and C(σ(')) = 0.05, which places this dimer in the weak-coupling limit. However, the S(1)/S(2) state exciton splittings Δ(calc) calculated by the configuration interaction singles method (CIS), time-dependent Hartree-Fock (TD-HF), and approximate second-order coupled-cluster method (CC2) are between 1100 and 1450 cm(-1), or seven to nine times larger than observed. These huge errors result from the neglect of the coupling to the optically active intra- and intermolecular vibrations of the dimer, which lead to vibronic quenching of the purely electronic excitonic splitting. For 2PY·6M2PY the electronic splitting is quenched by a factor of ~30 (i.e., the vibronic quenching factor is Γ(exp) = 0.035), which brings the calculated splittings into close agreement with the experimentally observed value. The 2C-R2PI and fluorescence spectra of the tautomeric species 2-hydroxypyridine·6-methyl-2-pyridone (2HP·6M2PY) are also observed and assigned.
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Affiliation(s)
- Cornelia G Heid
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3000 Bern 9, Switzerland
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47
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48
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Kuramochi Y, Satake A, Sandanayaka ASD, Araki Y, Ito O, Kobuke Y. Fullerene- and Pyromellitdiimide-Appended Tripodal Ligands Embedded in Light-Harvesting Porphyrin Macrorings. Inorg Chem 2011; 50:10249-58. [DOI: 10.1021/ic201250q] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yusuke Kuramochi
- Graduate School of Materials Science, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0101, Japan
| | - Akiharu Satake
- Graduate School of Materials Science, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0101, Japan
| | - Atula S. D. Sandanayaka
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira, Sendai, 980-8577, Japan
| | - Yasuyuki Araki
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira, Sendai, 980-8577, Japan
| | - Osamu Ito
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira, Sendai, 980-8577, Japan
| | - Yoshiaki Kobuke
- Graduate School of Materials Science, Nara Institute of Science and Technology, Takayama 8916-5, Ikoma, Nara 630-0101, Japan
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49
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Mennucci B, Curutchet C. The role of the environment in electronic energy transfer: a molecular modeling perspective. Phys Chem Chem Phys 2011; 13:11538-50. [PMID: 21597605 DOI: 10.1039/c1cp20601j] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The key role of the environment in electronic energy transfer has been underscored in recent experimental and theoretical studies. In this perspective, we provide an overview of novel quantum-mechanical methodologies aimed at describing environment effects in energy transfers. The techniques described include continuum dielectric and atomistic descriptions of the surroundings. We discuss the advantages and limitations of each technique, as well as the main insights that have emerged from their application to solvated dyads and photosynthetic pigment-protein complexes. We finally highlight the aspects that still need to be solved in order to provide a full theoretical route to the study of energy transfer phenomena in complex environments.
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Affiliation(s)
- Benedetta Mennucci
- Department of Chemistry, University of Pisa, via Risorgimento 35, 56126 Pisa, Italy.
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50
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Megow J, Röder B, Kulesza A, Bonačić‐Koutecký V, May V. A Mixed Quantum–Classical Description of Excitation Energy Transfer in Supramolecular Complexes: Förster Theory and beyond. Chemphyschem 2011; 12:645-56. [DOI: 10.1002/cphc.201000857] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 01/12/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Jörg Megow
- Institut für Physik, Humboldt Universität zu Berlin, Newtonstraße 15, D‐12489 Berlin (Germany), Fax: (+49) 30‐2093 7666
| | - Beate Röder
- Institut für Physik, Humboldt Universität zu Berlin, Newtonstraße 15, D‐12489 Berlin (Germany), Fax: (+49) 30‐2093 7666
| | - Alexander Kulesza
- Institut für Chemie, Humboldt Universität zu Berlin, Brook‐Taylor‐Straße 2, D‐12489 Berlin (Germany)
| | - Vlasta Bonačić‐Koutecký
- Institut für Chemie, Humboldt Universität zu Berlin, Brook‐Taylor‐Straße 2, D‐12489 Berlin (Germany)
| | - Volkhard May
- Institut für Physik, Humboldt Universität zu Berlin, Newtonstraße 15, D‐12489 Berlin (Germany), Fax: (+49) 30‐2093 7666
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