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Carta A, Wittmann B, Kreger K, Schmidt HW, Jansen TLC, Hildner R. Spatial Correlations Drive Long-Range Transport and Trapping of Excitons in Single H-Aggregates: Experiment and Theory. J Phys Chem Lett 2024; 15:2697-2707. [PMID: 38427597 PMCID: PMC10946646 DOI: 10.1021/acs.jpclett.3c03586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024]
Abstract
Describing long-range energy transport is a crucial step, both toward deepening our knowledge on natural light-harvesting systems and toward developing novel photoactive materials. Here, we combine experiment and theory to resolve and reproduce energy transport on pico- to nanosecond time scales in single H-type supramolecular nanofibers based on carbonyl-bridged triarylamines (CBT). Each nanofiber shows energy transport dynamics over long distances up to ∼1 μm, despite exciton trapping at specific positions along the nanofibers. Using a minimal Frenkel exciton model including disorder, we demonstrate that spatial correlations in the normally distributed site energies are crucial to reproduce the experimental data. In particular, we can observe the long-range and subdiffusive nature of the exciton dynamics as well as the trapping behavior of excitons in specific locations of the nanofiber. This trapping behavior introduces a net directionality or asymmetry in the exciton dynamics as observed experimentally.
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Affiliation(s)
- Alberto Carta
- Materials
Theory, Department of Materials, ETH Zürich, 8093 Zürich, Switzerland
| | - Bernd Wittmann
- Spectroscopy
of Soft Matter, University of Bayreuth, 95440 Bayreuth, Germany
| | - Klaus Kreger
- Macromolecular
Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95440 Bayreuth, Germany
| | - Hans-Werner Schmidt
- Macromolecular
Chemistry and Bavarian Polymer Institute, University of Bayreuth, 95440 Bayreuth, Germany
| | - Thomas L. C. Jansen
- Zernike
Institute for Advanced Materials, University
of Groningen, 9747 AG Groningen, The Netherlands
| | - Richard Hildner
- Zernike
Institute for Advanced Materials, University
of Groningen, 9747 AG Groningen, The Netherlands
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2
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Takahashi S, Matsumoto T, Hollamby MJ, Miyasaka H, Vacha M, Sotome H, Yagai S. Impact of Ring-Closing on the Photophysical Properties of One-Dimensional π-Conjugated Molecular Aggregate. J Am Chem Soc 2024; 146:2089-2101. [PMID: 38163763 DOI: 10.1021/jacs.3c11407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The self-assembled state of molecules plays a pivotal role in determining how inherent molecular properties transform and give rise to supramolecular functionalities and has long attracted attention. However, understanding the influence of morphologies spanning the nano- to mesoscopic scales of supramolecular assemblies derived from identical intermolecular interactions has been notoriously challenging due to dynamic structural change and monomer exchange of assemblies in solution. In this study, we demonstrate that curved one-dimensional molecular assemblies (supramolecular polymers) of lengths of around 70-200 nm, originating from the same luminescent molecule, exhibit distinct photoluminescent properties when they form closed circular structures (toroids) versus when they possess chain termini in solution (random coils). By exploiting the difference in kinetic stability between the toroids and random coils, we developed a dialysis protocol to selectively purify the former. It was revealed that these terminus-free closed structures manifest higher energy and more efficient luminescence compared with their mixed state with random coils. Time-resolved fluorescence measurements unveiled that random coils, due to their dynamic structural fluctuation in solution, generate local defects throughout the main chain, leading to luminescence from lower energy levels. In mixtures of the two assemblies, luminescence was exclusively observed from such a lower energy level of random coils, a result attributed to energy transfer between the assemblies. This work emphasizes that for identical supramolecular assemblies, only averaged properties have traditionally been considered, but their structures at the nano- to mesoscopic scale are important especially if they have a certain degree of shape persistency even in solution.
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Affiliation(s)
- Sho Takahashi
- Division of Advanced Science and Engineering, Graduate School of Science and Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Takuma Matsumoto
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12 Meguro-ku, Tokyo 152-8552, Japan
| | - Martin J Hollamby
- Department of Chemistry, School of Chemical and Physical Sciences, Keele University, Keele, Staffordshire ST55BG, U.K
| | - Hiroshi Miyasaka
- Division of Frontier Materials Science and Centre for Advanced Interdisciplinary Research, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Martin Vacha
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12 Meguro-ku, Tokyo 152-8552, Japan
| | - Hikaru Sotome
- Division of Frontier Materials Science and Centre for Advanced Interdisciplinary Research, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Shiki Yagai
- Institute for Advanced Academic Research (IAAR), Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
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3
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Usoltsev SD, Raitman OA, Shokurov AV, Marfin YS. Variety of steady and excited state interactions in BODIPY aggregates: photophysics in antisolvent systems and floating layers. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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4
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Grankina II, Borovoy IA, Petrushenko SI, Hrankina SS, Semynozhenko VP, Yefimova SL, Sorokin AV. Fluorescent properties of amphi-PIC J-aggregates in the complexes with bovine serum albumin. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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5
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Datta S, Chaudhuri D. Reversible Supramolecular Polymorphism in Solution and Solid Matrix by Manipulating Sidegroup Conformation. Angew Chem Int Ed Engl 2022; 61:e202201956. [PMID: 35180328 DOI: 10.1002/anie.202201956] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Indexed: 12/28/2022]
Abstract
Reversible switching between supramolecular polymorphs offers a great way to introduce stimuli-responsiveness. Supramolecular polymorphism is usually achieved through pathway complexity, or by exploiting solvent-solute interactions. But, steering a self-assembly along a specific pathway to form a kinetically-stable aggregate is not easy. Also, changing solvent to switch between polymorphs is impractical. We present a perylene bisimide molecule with a trans-azobenzene sidegroup that assembles into three supramolecular polymorphs with distinct colors, morphologies, packing and aggregation mechanism. Optical absorption and FTIR spectroscopy reveal the importance of hydrogen-bonding interaction between protic solvent and azo N that controls the planarity of the azobenzene group and influences molecular packing. This interaction can be further modulated using temperature, and solution pH to reversibly switch between the three polymorphs, in solution as well as in solid silica-gel matrix.
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Affiliation(s)
- Saptarshi Datta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741246, India
| | - Debangshu Chaudhuri
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741246, India
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6
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Datta S, Chaudhuri D. Reversible Supramolecular Polymorphism in Solution and Solid Matrix by Manipulating Sidegroup Conformation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Saptarshi Datta
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246 India
| | - Debangshu Chaudhuri
- Department of Chemical Sciences Indian Institute of Science Education and Research (IISER) Kolkata Mohanpur 741246 India
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7
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Abstract
The discovery of the self-assembly of cyanine dyes into J-aggregates had a major impact on the development of dye chemistry due to the emergence of new useful properties in the aggregated state. The unique optical features of these J-aggregates are narrowed, bathochromically shifted absorption bands with almost resonant fluorescence with an increased radiative rate that results from the coherently coupled molecular transition dipoles arranged in a slip-stacked fashion. Because of their desirable properties, J-aggregates gained popularity in the field of functional materials and enabled the efficient photosensitization of silver halide grains in color photography. However, despite a good theoretical understanding of structure-property relationships by the molecular exciton model, further examples of J-aggregates remained scarce for a long time as supramolecular designs to guide the formation of dye aggregates into the required slip-stacked arrangement were lacking.Drawing inspiration from the bacteriochlorophyll c self-organization found in the chlorosomal light-harvesting antennas of green sulfur bacteria, we envisioned the use of nature's supramolecular blueprint to develop J-aggregates of perylene bisimides (PBIs). This class of materials is applied in high-performance color pigments and as n-type organic semiconductors in transistors and solar cells. Combining outstanding photochemical and thermal stability, high tinctorial strength and excellent fluorescence, PBIs are therefore an ideal model system for the preparation of J-aggregates with a wide range of potential applications.In this Account, we elucidate how a combination of steric constraints and hydrogen bonding receptor sites can guide the self-assembly of PBI dyes into slip-stacked packing motifs with J-type exciton coupling. We will discuss the supramolecular polymerization of multiple hydrogen-bonded PBI strands in organic and aqueous media and how minor structural modifications in monomeric PBI molecules can be used to obtain near-infrared absorbing J-aggregates, organogels, or thermoresponsive hydrogels. Pushing the boundaries of self-assembly into the bulk, engineering of the substituents' steric requirements by a dendron-wedge approach afforded adjustable numbers of helical strands of PBI J-aggregates in the columnar liquid-crystalline state and the preparation of lamellar phases. To fully explore their potential, we have studied PBI J-aggregates in collaborative work with spectroscopists, physicists, and theoreticians. In this way, exciton migration over distances of up to 180 nm was shown, and insights into the influence of static disorder on the transport of excitation energy in PBI J-aggregates were derived. Furthermore, the application of PBI J-aggregates as functional materials was demonstrated in photonic microcavities, thin-film transistors, and organic solar cells.
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Affiliation(s)
- Markus Hecht
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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8
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Kunsel T, Löhner A, Mayo JJ, Köhler J, Jansen TLC, Knoester J. Unraveling intra-aggregate structural disorder using single-molecule spectroscopy. J Chem Phys 2020; 153:134304. [PMID: 33032400 DOI: 10.1063/5.0023551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Structural disorder within self-assembled molecular aggregates may have strong effects on their optical functionality. Such disorder, however, is hard to explore using standard ensemble measurements. In this paper, we report on the characterization of intra-aggregate structural disorder through a linewidth analysis of fluorescence excitation experiments on individual zinc-chlorin (ZnChl) nanotubular molecular aggregates. Recent experiments suggest an anomaly in the linewidths of the two absorption bands that dominate the spectra: the higher-energy bands on average show a smaller linewidth than the lower-energy bands. This anomaly is explored in this paper by analyzing and modeling the correlation of the two linewidths for each aggregate. We exploit a Frenkel exciton model to show that the experimentally observed correlation of linewidths and other statistical properties of the single-aggregate spectra can be explained from small variations of the molecular orientations within individual aggregates.
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Affiliation(s)
- T Kunsel
- University of Groningen, Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - A Löhner
- Spectroscopy of Soft Matter, University of Bayreuth, Universitätsstraße 30, 94557 Bayreuth, Germany
| | - J J Mayo
- University of Groningen, Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - J Köhler
- Spectroscopy of Soft Matter, University of Bayreuth, Universitätsstraße 30, 94557 Bayreuth, Germany
| | - T L C Jansen
- University of Groningen, Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - J Knoester
- University of Groningen, Zernike Institute for Advanced Materials, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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9
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Dobrovolsky A, Merdasa A, Li J, Hirselandt K, Unger EL, Scheblykin IG. Relating Defect Luminescence and Nonradiative Charge Recombination in MAPbI 3 Perovskite Films. J Phys Chem Lett 2020; 11:1714-1720. [PMID: 32036661 DOI: 10.1021/acs.jpclett.9b03878] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nonradiative losses in semiconductors are related to defects. At cryogenic temperatures, defect-related photoluminescence (PL) at energies lower than the band-edge PL is observed in methylammonium lead triiodide perovskite. We applied multispectral PL imaging to samples prepared by two different procedures and exhibiting 1 order of magnitude different PL quantum yield (PLQY). The high-PLQY sample showed concentration of the emitting defect sites around 1012-1013 cm-3. No correlation between PLQY and the relative intensity of the defect emission was found when micrometer-sized local regions of the same sample were compared. However, a clear positive correlation between the lower PLQY and higher defect emission was observed when two preparation methods were contrasted. Therefore, although the emissive defects are not connected directly with the nonradiative centers and may be spatially separated at the nano scale, chemical processes during the perovskite synthesis promote/prevent formation of both types of defects at the same time.
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Affiliation(s)
| | - Aboma Merdasa
- Young Investigator Group Hybrid Materials Formation and Scaling, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Albert-Einstein Strasse 16, 12489 Berlin, Germany
| | - Jun Li
- Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Katrin Hirselandt
- Young Investigator Group Hybrid Materials Formation and Scaling, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Albert-Einstein Strasse 16, 12489 Berlin, Germany
| | - Eva L Unger
- Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Young Investigator Group Hybrid Materials Formation and Scaling, Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, Albert-Einstein Strasse 16, 12489 Berlin, Germany
| | - Ivan G Scheblykin
- Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
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10
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Hecht M, Schlossarek T, Stolte M, Lehmann M, Würthner F. Photoconductive Core–Shell Liquid‐Crystals of a Perylene Bisimide J‐Aggregate Donor–Acceptor Dyad. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904789] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markus Hecht
- Institut für Organische Chemie Center for Nanosystems Chemistry & Bavarian Polymer Institute Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Tim Schlossarek
- Institut für Organische Chemie Center for Nanosystems Chemistry & Bavarian Polymer Institute Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Matthias Stolte
- Institut für Organische Chemie Center for Nanosystems Chemistry & Bavarian Polymer Institute Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Matthias Lehmann
- Institut für Organische Chemie Center for Nanosystems Chemistry & Bavarian Polymer Institute Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Frank Würthner
- Institut für Organische Chemie Center for Nanosystems Chemistry & Bavarian Polymer Institute Universität Würzburg Am Hubland 97074 Würzburg Germany
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11
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Hecht M, Schlossarek T, Stolte M, Lehmann M, Würthner F. Photoconductive Core-Shell Liquid-Crystals of a Perylene Bisimide J-Aggregate Donor-Acceptor Dyad. Angew Chem Int Ed Engl 2019; 58:12979-12983. [PMID: 31246352 DOI: 10.1002/anie.201904789] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Indexed: 12/24/2022]
Abstract
A novel core-shell structured columnar liquid crystal composed of a donor-acceptor dyad of tetraphenoxy perylene bisimide (PBI), decorated with four bithiophene units on the periphery, was synthesized. This molecule self-assembles in solution into helical J-aggregates guided by π-π interactions and hydrogen bonds which organize into a liquid-crystalline (LC) columnar hexagonal domain in the solid state. Donor and acceptor moieties exhibit contrasting exciton coupling behavior with the PBIs' (J-type) transition dipole moment parallel and the bithiophene side arms' (H-type) perpendicular to the columnar axis. The dyad shows efficient energy and electron transfer in solution as well as in the solid state. The synergy of photoinduced electron transfer (PET) and charge transport along the narcissistically self-assembled core-shell structure enables the implementation of the dye in two-contact photoconductivity devices giving rise to a 20-fold increased photoresponse compared to a reference dye without bithiophene donor moieties.
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Affiliation(s)
- Markus Hecht
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Tim Schlossarek
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Matthias Stolte
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Matthias Lehmann
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Frank Würthner
- Institut für Organische Chemie, Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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Camacho R, Täuber D, Scheblykin IG. Fluorescence Anisotropy Reloaded-Emerging Polarization Microscopy Methods for Assessing Chromophores' Organization and Excitation Energy Transfer in Single Molecules, Particles, Films, and Beyond. Adv Mater 2019; 31:e1805671. [PMID: 30721532 DOI: 10.1002/adma.201805671] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Fluorescence polarization is widely used to assess the orientation/rotation of molecules, and the excitation energy transfer between closely located chromophores. Emerging since the 1990s, single molecule fluorescence spectroscopy and imaging stimulate the application of light polarization for studying molecular organization and energy transfer beyond ensemble averaging. Here, traditional fluorescence polarization and linear dichroism methods used for bulk samples are compared with techniques specially developed for, or inspired by, single molecule fluorescence spectroscopy. Techniques for assessing energy transfer in anisotropic samples, where the traditional fluorescence anisotropy framework is not readily applicable, are discussed in depth. It is shown that the concept of a polarization portrait and the single funnel approximation can lay the foundation for alternative energy transfer metrics. Examples ranging from fundamental studies of photoactive materials (conjugated polymers, light-harvesting aggregates, and perovskite semiconductors) to Förster resonant energy transfer (FRET)-based biomedical imaging are presented. Furthermore, novel uses of light polarization for super-resolution optical imaging are mentioned as well as strategies for avoiding artifacts in polarization microscopy.
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Affiliation(s)
- Rafael Camacho
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Daniela Täuber
- Chemical Physics and NanoLund, Lund University, P.O. Box 124, SE-22100, Lund, Sweden
- Biopolarisation, Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, D-07745, Jena, Germany
- Institute of Solid State Physics, FSU Jena, Helmholtzweg 3, D-07743, Jena, Germany
| | - Ivan G Scheblykin
- Chemical Physics and NanoLund, Lund University, P.O. Box 124, SE-22100, Lund, Sweden
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Morisue M, Ueno I, Muraoka K, Omagari S, Nakanishi T, Hasegawa Y, Hikima T, Sasaki S. Perfluorophenyl‐Directed Giant Porphyrin J‐Aggregates. Chemistry 2019; 25:7322-7329. [DOI: 10.1002/chem.201901017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Indexed: 01/27/2023]
Affiliation(s)
- Mitsuhiko Morisue
- Faculty of Molecular Chemistry and EngineeringKyoto Institute of Technology Matsugasaki Sakyo-ku, Kyoto 606-8585 Japan
| | - Ikuya Ueno
- Faculty of Molecular Chemistry and EngineeringKyoto Institute of Technology Matsugasaki Sakyo-ku, Kyoto 606-8585 Japan
| | - Kunihiko Muraoka
- Faculty of Molecular Chemistry and EngineeringKyoto Institute of Technology Matsugasaki Sakyo-ku, Kyoto 606-8585 Japan
| | - Shun Omagari
- Graduate School of EngineeringHokkaido University North 13 West 8 Kita-ku, Sapporo 060-8628 Japan
- Present address: School of Materials and Chemical TechnologyTokyo Institute of Technology, Ookayama 2–12-1-S8 Meguro-ku Tokyo 152-8552 Japan
| | - Takayuki Nakanishi
- Graduate School of EngineeringHokkaido University North 13 West 8 Kita-ku, Sapporo 060-8628 Japan
- Present address: Department of Materials Science and TechnologyTokyo University of Science 6-3-1 Niijuku Katsushika-ku Tokyo 125-8585 Japan
| | - Yasuchika Hasegawa
- Graduate School of EngineeringHokkaido University North 13 West 8 Kita-ku, Sapporo 060-8628 Japan
| | - Takaaki Hikima
- RIKEN SPring-8 Center 1-1-1, Kouto Sayo-cho Sayo-gun, Hyogo 679-5148 Japan
| | - Sono Sasaki
- Faculty of Fiber Science and EngineeringKyoto Institute of Technology Matsugasaki Sakyo-ku, Kyoto 606-8585 Japan
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14
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Pujals S, Feiner-Gracia N, Delcanale P, Voets I, Albertazzi L. Super-resolution microscopy as a powerful tool to study complex synthetic materials. Nat Rev Chem 2019. [DOI: 10.1038/s41570-018-0070-2] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Kim T, Ham S, Lee SH, Hong Y, Kim D. Enhancement of exciton transport in porphyrin aggregate nanostructures by controlling the hierarchical self-assembly. Nanoscale 2018; 10:16438-16446. [PMID: 30141821 DOI: 10.1039/c8nr05016c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Exciton transport in meso-tetra(4-sulfonatophenyl) porphyrin (TPPS) J-aggregates was directly imaged using the emission profile analysis method with confocal fluorescence microscopy. By controlling the structural hierarchy of TPPS aggregates, we could comparatively study the exciton transport properties in single nanotubes and bundled structures. Using the one-dimensional diffusion model, the exciton diffusion coefficients of TPPS nanotubes and bundles were estimated as 95 and 393 nm2 ps-1, respectively, showing a dramatic enhancement of exciton transport in bundled structures. To reveal the underlying mechanism of enhanced exciton transport in bundle compared to that in single strands, the spatially resolved measurements of exciton transport images were correlated with the spectral information at each local sites. We have confirmed that nanotube and its bundled form possess different energetic landscapes and exciton migration dynamics. Agglomeration into bundles led to an increase in system-environment coupling and denser distribution of energy states, facilitating longer migration length and accelerated transport. Detailed analysis in this study provides important insights into the structure-dependent exciton transport properties of self-assembled J-aggregate nanostructures.
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Affiliation(s)
- Taehee Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea.
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Abstract
An excimer in J-aggregates has been often considered as a self-trapped exciton originating from the free exciton excited on the same aggregate and relaxed through interaction with vibronic modes. Here we show that other types of excimers due to intermolecular off-diagonal interactions can be observed in J-aggregates of thiamonomethinecyanine dyes. These excimers arise owing to free excitons too, but they possess a longer formation time of more than 100 ps, indicating migration of free excitons to the excimer formation site, where they interact with a guest species in the ground state. Formation of the excimers occurs in solutions as a power law of concentration with an exponent of 1.5, showing that an excited aggregate should be twice longer than a ground-state guest species, consistent with the exciton coherence length of four molecules versus one dimer, respectively. Unlike the self-trapped exciton, lower temperatures lead to significant suppression of the observed excimer emission.
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Affiliation(s)
- Oleg P Dimitriev
- V. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine , pr. Nauki 41 , Kyiv 03028 , Ukraine
| | - Yuri P Piryatinski
- Institute of Physics NAS of Ukraine , pr. Nauki 46 , Kyiv 03028 , Ukraine
| | - Yuri L Slominskii
- Institute of Organic Chemistry NAS of Ukraine , 5 Murmanska Street , Kyiv 02660 , Ukraine
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17
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Morisue M, Omagari S, Ueno I, Nakanishi T, Hasegawa Y, Yamamoto S, Matsui J, Sasaki S, Hikima T, Sakurai S. Fully Conjugated Porphyrin Glass: Collective Light-Harvesting Antenna for Near-Infrared Fluorescence beyond 1 μm. ACS Omega 2018; 3:4466-4474. [PMID: 30023894 PMCID: PMC6044875 DOI: 10.1021/acsomega.8b00566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
Expanded π-systems with a narrow highest occupied molecular orbital-lowest unoccupied molecular orbital band gap encounter deactivation of excitons due to the "energy gap law" and undesired aggregation. This dilemma generally thwarts the near-infrared (NIR) luminescence of organic π-systems. A sophisticated cofacially stacked π-system is known to involve exponentially tailed disorder, which displays exceptionally red-shifted fluorescence even as only a marginal emission component. Enhancement of the tail-state fluorescence might be advantageous to achieve NIR photoluminescence with an expected collective light-harvesting antenna effect as follows: (i) efficient light-harvesting capacity due to intense electronic absorption, (ii) a long-distance exciton migration into the tail state based on a high spatial density of the chromophore site, and (iii) substantial transmission of NIR emission to circumvent the inner filter effect. Suppression of aggregation-induced quenching of fluorescence could realize collective light-harvesting antenna for NIR-luminescence materials. This study discloses an enhanced tail-state NIR fluorescence of a self-standing porphyrin film at 1138 nm with a moderate quantum efficiency based on a fully π-conjugated porphyrin that adopts an amorphous form, called "porphyrin glass".
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Affiliation(s)
- Mitsuhiko Morisue
- Faculty
of Molecular Chemistry and Engineering and Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shun Omagari
- Graduate
School of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-8628, Japan
| | - Ikuya Ueno
- Faculty
of Molecular Chemistry and Engineering and Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Takayuki Nakanishi
- Graduate
School of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yasuchika Hasegawa
- Graduate
School of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo 060-8628, Japan
| | - Shunsuke Yamamoto
- Institute
of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Jun Matsui
- Department
of Science, Yamagata University, Kojirakawa-cho, Yamagata 990-8560, Japan
| | - Sono Sasaki
- Faculty
of Molecular Chemistry and Engineering and Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Takaaki Hikima
- RIKEN SPring-8
Center, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Shinichi Sakurai
- Faculty
of Molecular Chemistry and Engineering and Faculty of Fiber Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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18
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Abstract
The electronic excited states of molecular aggregates and their photophysical signatures have long fascinated spectroscopists and theoreticians alike since the advent of Frenkel exciton theory almost 90 years ago. The influence of molecular packing on basic optical probes like absorption and photoluminescence was originally worked out by Kasha for aggregates dominated by Coulombic intermolecular interactions, eventually leading to the classification of J- and H-aggregates. This review outlines advances made in understanding the relationship between aggregate structure and photophysics when vibronic coupling and intermolecular charge transfer are incorporated. An assortment of packing geometries is considered from the humble molecular dimer to more exotic structures including linear and bent aggregates, two-dimensional herringbone and "HJ" aggregates, and chiral aggregates. The interplay between long-range Coulomb coupling and short-range charge-transfer-mediated coupling strongly depends on the aggregate architecture leading to a wide array of photophysical behaviors.
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Affiliation(s)
- Nicholas J Hestand
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
| | - Frank C Spano
- Department of Chemistry , Temple University , Philadelphia , Pennsylvania 19122 , United States
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19
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Fennel F, Gershberg J, Stolte M, Würthner F. Fluorescence quantum yields of dye aggregates: a showcase example based on self-assembled perylene bisimide dimers. Phys Chem Chem Phys 2018; 20:7612-7620. [DOI: 10.1039/c7cp07778e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Two measurement approaches for the precise quantum yield determination of supramolecular aggregates in highly concentrated solutions are presented and experimentally tested for an emissive perylene bisimide H-type aggregate with a quantum yield of 28%.
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Affiliation(s)
- Franziska Fennel
- Center for Nanosystems Chemistry (CNC) & Bavarian Polymer Institute (BPI)
- Universität Würzburg
- 97074 Würzburg
- Germany
| | - Jana Gershberg
- Institut für Organische Chemie
- Universität Würzburg
- 97074 Würzburg
- Germany
| | - Matthias Stolte
- Center for Nanosystems Chemistry (CNC) & Bavarian Polymer Institute (BPI)
- Universität Würzburg
- 97074 Würzburg
- Germany
- Institut für Organische Chemie
| | - Frank Würthner
- Center for Nanosystems Chemistry (CNC) & Bavarian Polymer Institute (BPI)
- Universität Würzburg
- 97074 Würzburg
- Germany
- Institut für Organische Chemie
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20
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Ma F, Yu LJ, Llansola-Portoles MJ, Robert B, Wang-Otomo ZY, van Grondelle R. Metal Cations Induced αβ-BChl a
Heterogeneity in LH1 as Revealed by Temperature-Dependent Fluorescence Splitting. Chemphyschem 2017; 18:2295-2301. [DOI: 10.1002/cphc.201700551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 06/09/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Fei Ma
- Department of Biophysics; Faculty of Sciences; VU University Amsterdam; De Boelelaan 1081 1081 HV Amsterdam The Netherlands
| | - Long-Jiang Yu
- Faculty of Science; Ibaraki University; Mito Ibaraki 310-8512 Japan
| | - Manuel J. Llansola-Portoles
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS; Univ Paris-Sud, Université Paris-Saclay; F-91198 Gif-sur-Yvette cedex France
| | - Bruno Robert
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS; Univ Paris-Sud, Université Paris-Saclay; F-91198 Gif-sur-Yvette cedex France
| | | | - Rienk van Grondelle
- Department of Biophysics; Faculty of Sciences; VU University Amsterdam; De Boelelaan 1081 1081 HV Amsterdam The Netherlands
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21
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Merdasa A, Tian Y, Camacho R, Dobrovolsky A, Debroye E, Unger EL, Hofkens J, Sundström V, Scheblykin IG. "Supertrap" at Work: Extremely Efficient Nonradiative Recombination Channels in MAPbI 3 Perovskites Revealed by Luminescence Super-Resolution Imaging and Spectroscopy. ACS Nano 2017; 11:5391-5404. [PMID: 28485977 DOI: 10.1021/acsnano.6b07407] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Organo-metal halide perovskites are some of the most promising materials for the new generation of low-cost photovoltaic and light-emitting devices. Their solution processability is a beneficial trait, although it leads to a spatial inhomogeneity of perovskite films with a variation of the trap state density at the nanoscale. Comprehending their properties using traditional spectroscopy therefore becomes difficult, calling for a combination with microscopy in order to see beyond the ensemble-averaged response. We studied photoluminescence (PL) blinking of micrometer-sized individual methylammonium lead iodide (MAPbI3) perovskite polycrystals, as well as monocrystalline microrods up to 10 μm long. We correlated their PL dynamics with structure employing scanning electron and optical super-resolution microscopy. Combining super-resolution localization imaging and super-resolution optical fluctuation imaging (SOFI), we could detect and quantify preferential emitting regions in polycrystals exhibiting different types of blinking. We propose that blinking in MAPbI3 occurs by the activation/passivation of a "supertrap" which presumably is a donor-acceptor pair able to trap both electrons and holes. As such, nonradiative recombination via supertraps, in spite being present at a rather low concentrations (1012-1015 cm-3), is much more efficient than via all other defect states present in the material at higher concentrations (1016-1018 cm-3). We speculate that activation/deactivation of a supertrap occurs by its temporary dissociation into free donor and acceptor impurities. We found that supertraps are most efficient in structurally homogeneous and large MAPbI3 crystals where carrier diffusion is efficient, which may therefore pose limitations on the efficiency of perovskite-based devices.
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Affiliation(s)
- Aboma Merdasa
- Chemical Physics and NanoLund, Lund University , PO Box 118, 22100 Lund, Sweden
| | - Yuxi Tian
- School of Chemistry & Chemical Engineering, Key Laboratory of Mesoscopic Chemistry of MOE and Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University , 22 Hankou Rd, Nanjing 210023, China
| | - Rafael Camacho
- Department of Chemistry, KU Leuven , Celestijenlaan 200F, B-3001 Leuven, Belgium
| | | | - Elke Debroye
- Department of Chemistry, KU Leuven , Celestijenlaan 200F, B-3001 Leuven, Belgium
| | - Eva L Unger
- Chemical Physics and NanoLund, Lund University , PO Box 118, 22100 Lund, Sweden
- Helmholtz-Zentrum Berlin für Materialen und Energie GmbH , Kekuléstraße 5, 12489 Berlin, Germany
| | - Johan Hofkens
- Department of Chemistry, KU Leuven , Celestijenlaan 200F, B-3001 Leuven, Belgium
| | - Villy Sundström
- Chemical Physics and NanoLund, Lund University , PO Box 118, 22100 Lund, Sweden
| | - Ivan G Scheblykin
- Chemical Physics and NanoLund, Lund University , PO Box 118, 22100 Lund, Sweden
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22
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Chen T, Dong B, Chen K, Zhao F, Cheng X, Ma C, Lee S, Zhang P, Kang SH, Ha JW, Xu W, Fang N. Optical Super-Resolution Imaging of Surface Reactions. Chem Rev 2017; 117:7510-7537. [DOI: 10.1021/acs.chemrev.6b00673] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Tao Chen
- State
Key Laboratory of Electroanalytical Chemistry and Jilin Province Key
Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China
- University of Chinese Academy of Science, Beijing, 100049, P. R. China
| | - Bin Dong
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Kuangcai Chen
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Fei Zhao
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Xiaodong Cheng
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Changbei Ma
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China
| | - Seungah Lee
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Peng Zhang
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seong Ho Kang
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Ji Won Ha
- Department
of Chemistry, University of Ulsan, 93 Dahak-Ro, Nam-Gu, Ulsan 44610, Republic of Korea
| | - Weilin Xu
- State
Key Laboratory of Electroanalytical Chemistry and Jilin Province Key
Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Ning Fang
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
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23
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Lüer L, Rajendran SK, Stoll T, Ganzer L, Rehault J, Coles DM, Lidzey D, Virgili T, Cerullo G. Lévy Defects in Matrix-Immobilized J Aggregates: Tracing Intra-and Intersegmental Exciton Relaxation. J Phys Chem Lett 2017; 8:547-552. [PMID: 28045534 DOI: 10.1021/acs.jpclett.6b02704] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
One-dimensional J aggregates present narrow and intense absorption and emission spectra that are interesting for photonics applications. Matrix immobilization of the aggregates, as required for most device architectures, has recently been shown to induce a non-Gaussian (Lévy type) defect distribution with heavy tails, expected to influence exciton relaxation. Here we perform two-dimensional electronic spectroscopy (2DES) in one-dimensional J aggregates of the cyanine dye TDBC, immobilized in a gel matrix, and we quantitatively model 2DES maps by nonlinear optimization coupled to quantum mechanical calculations of the transient excitonic response. We find that immobilization causes strong non-Gaussian off-diagonal disorder, leading to a segmentation of the chains. Intersegmental exciton transfer is found to proceed on the picosecond time scale, causing a long-lasting excitation memory. These findings can be used to inform the design of optoelectronic devices based on J aggregates as they allow for control of exciton properties by disorder management.
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Affiliation(s)
- Larry Lüer
- IMDEA Nanociencia , C/Faraday 9, 28049 Cantoblanco, Madrid, Spain
| | - Sai Kiran Rajendran
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
- School of Physics and Astronomy, University of St. Andrews , St. Andrews, Fife KY16 9SS, United Kingdom
| | - Tatjana Stoll
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Lucia Ganzer
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Julien Rehault
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
- Paul Scherrer Institut , 5232 Villigen PSI, Switzerland
| | - David M Coles
- Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom
| | - David Lidzey
- Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom
| | - Tersilla Virgili
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Giulio Cerullo
- Dipartimento di Fisica, IFN-CNR , Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
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24
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Camacho R, Tubasum S, Southall J, Cogdell RJ, Sforazzini G, Anderson HL, Pullerits T, Scheblykin IG. Fluorescence polarization measures energy funneling in single light-harvesting antennas--LH2 vs conjugated polymers. Sci Rep 2015; 5:15080. [PMID: 26478272 PMCID: PMC4609963 DOI: 10.1038/srep15080] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 09/09/2015] [Indexed: 01/15/2023] Open
Abstract
Numerous approaches have been proposed to mimic natural photosynthesis using artificial antenna systems, such as conjugated polymers (CPs), dendrimers, and J-aggregates. As a result, there is a need to characterize and compare the excitation energy transfer (EET) properties of various natural and artificial antennas. Here we experimentally show that EET in single antennas can be characterized by 2D polarization imaging using the single funnel approximation. This methodology addresses the ability of an individual antenna to transfer its absorbed energy towards a single pool of emissive states, using a single parameter called energy funneling efficiency (ε). We studied individual peripheral antennas of purple bacteria (LH2) and single CP chains of 20 nm length. As expected from a perfect antenna, LH2s showed funneling efficiencies close to unity. In contrast, CPs showed lower average funneling efficiencies, greatly varying from molecule to molecule. Cyclodextrin insulation of the conjugated backbone improves EET, increasing the fraction of CPs possessing ε = 1. Comparison between LH2s and CPs shows the importance of the protection systems and the protein scaffold of LH2, which keep the chromophores in functional form and at such geometrical arrangement that ensures excellent EET.
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Affiliation(s)
- Rafael Camacho
- Chemical Physics, Lund University, PO Box 124, Lund, SE-22100, Sweden
| | - Sumera Tubasum
- Chemical Physics, Lund University, PO Box 124, Lund, SE-22100, Sweden
| | - June Southall
- Glasgow Biomedical Research Centre, University of Glasgow, G12 8QQ, United Kingdom
| | - Richard J Cogdell
- Glasgow Biomedical Research Centre, University of Glasgow, G12 8QQ, United Kingdom
| | - Giuseppe Sforazzini
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Harry L Anderson
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom
| | - Tõnu Pullerits
- Chemical Physics, Lund University, PO Box 124, Lund, SE-22100, Sweden
| | - Ivan G Scheblykin
- Chemical Physics, Lund University, PO Box 124, Lund, SE-22100, Sweden
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25
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Tian Y, Merdasa A, Unger E, Abdellah M, Zheng K, McKibbin S, Mikkelsen A, Pullerits T, Yartsev A, Sundström V, Scheblykin IG. Enhanced Organo-Metal Halide Perovskite Photoluminescence from Nanosized Defect-Free Crystallites and Emitting Sites. J Phys Chem Lett 2015; 6:4171-7. [PMID: 26722793 DOI: 10.1021/acs.jpclett.5b02033] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Photoluminescence (PL) of organo-metal halide perovskite semiconductors can be enhanced by several orders of magnitude by exposure to visible light. We applied PL microscopy and super-resolution optical imaging to investigate this phenomenon with spatial resolution better than 10 nm using films of CH3NH3PbI3 prepared by the equimolar solution-deposition method, resulting in crystals of different sizes. We found that PL of ∼100 nm crystals enhances much faster than that of larger, micrometer-sized ones. This crystal-size dependence of the photochemical light passivation of charge traps responsible for PL quenching allowed us to conclude that traps are present in the entire crystal volume rather than at the surface only. Because of this effect, "dark" micrometer-sized perovskite crystals can be converted into highly luminescent smaller ones just by mechanical grinding. Super-resolution optical imaging shows spatial inhomogeneity of the PL intensity within perovskite crystals and the existence of <100 nm-sized localized emitting sites. The possible origin of these sites is discussed.
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Affiliation(s)
- Yuxi Tian
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Aboma Merdasa
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Eva Unger
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Mohamed Abdellah
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Kaibo Zheng
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Sarah McKibbin
- Division of Synchrotron Radiation Research, Lund University , Box 118, 221 00 Lund, Sweden
| | - Anders Mikkelsen
- Division of Synchrotron Radiation Research, Lund University , Box 118, 221 00 Lund, Sweden
| | - Tõnu Pullerits
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Arkady Yartsev
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
| | - Villy Sundström
- Chemical Physics, Lund University , Box 124, SE-22100 Lund, Sweden
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26
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Würthner F, Saha-Möller CR, Fimmel B, Ogi S, Leowanawat P, Schmidt D. Perylene Bisimide Dye Assemblies as Archetype Functional Supramolecular Materials. Chem Rev 2015; 116:962-1052. [PMID: 26270260 DOI: 10.1021/acs.chemrev.5b00188] [Citation(s) in RCA: 937] [Impact Index Per Article: 104.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Frank Würthner
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Chantu R Saha-Möller
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Benjamin Fimmel
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Soichiro Ogi
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - Pawaret Leowanawat
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
| | - David Schmidt
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
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27
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Battistelli G, Cantelli A, Guidetti G, Manzi J, Montalti M. Ultra-bright and stimuli-responsive fluorescent nanoparticles for bioimaging. WIREs Nanomed Nanobiotechnol 2015; 8:139-50. [DOI: 10.1002/wnan.1351] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Revised: 04/15/2015] [Accepted: 04/19/2015] [Indexed: 12/22/2022]
Affiliation(s)
- Giulia Battistelli
- Department of Chemistry ‘Giacomo Ciamician’; University of Bologna; Bologna Italy
| | - Andrea Cantelli
- Department of Chemistry ‘Giacomo Ciamician’; University of Bologna; Bologna Italy
| | - Gloria Guidetti
- Department of Chemistry ‘Giacomo Ciamician’; University of Bologna; Bologna Italy
| | - Jeannette Manzi
- Department of Chemistry ‘Giacomo Ciamician’; University of Bologna; Bologna Italy
| | - Marco Montalti
- Department of Chemistry ‘Giacomo Ciamician’; University of Bologna; Bologna Italy
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28
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Tian Y, Merdasa A, Peter M, Abdellah M, Zheng K, Ponseca CS, Pullerits T, Yartsev A, Sundström V, Scheblykin IG. Giant photoluminescence blinking of perovskite nanocrystals reveals single-trap control of luminescence. Nano Lett 2015; 15:1603-8. [PMID: 25706329 DOI: 10.1021/nl5041397] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Fluorescence super-resolution microscopy showed correlated fluctuations of photoluminescence intensity and spatial localization of individual perovskite (CH3NH3PbI3) nanocrystals of size ∼200 × 30 × 30 nm(3). The photoluminescence blinking amplitude caused by a single quencher was a hundred thousand times larger than that of a typical dye molecule at the same excitation power density. The quencher is proposed to be a chemical or structural defect that traps free charges leading to nonradiative recombination. These trapping sites can be activated and deactivated by light.
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Affiliation(s)
- Yuxi Tian
- Chemical Physics, Lund University , Box 124, SE-22100, Lund, Sweden
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29
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Megow J, Röhr MIS, Schmidt am Busch M, Renger T, Mitrić R, Kirstein S, Rabe JP, May V. Site-dependence of van der Waals interaction explains exciton spectra of double-walled tubular J-aggregates. Phys Chem Chem Phys 2015; 17:6741-7. [DOI: 10.1039/c4cp05945j] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Van der Waals interaction causes energy splitting in the optical spectrum of a double-walled tubular J-aggregate.
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Affiliation(s)
- Jörg Megow
- Institut für Chemie
- Universität Potsdam
- D-14476 Potsdam
- F. R. Germany
| | - Merle I. S. Röhr
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- D-97074 Würzburg
- F. R. Germany
| | | | - Thomas Renger
- Institut für Theoretische Physik
- Johannes Kepler Universität Linz
- AT-4040 Linz
- Austria
| | - Roland Mitrić
- Institut für Physikalische und Theoretische Chemie
- Universität Würzburg
- D-97074 Würzburg
- F. R. Germany
| | - Stefan Kirstein
- Institut für Physik
- Humboldt-Universität zu Berlin
- D-12489 Berlin
- F. R. Germany
| | - Jürgen P. Rabe
- Institut für Physik
- Humboldt-Universität zu Berlin
- D-12489 Berlin
- F. R. Germany
- IRIS Adlershof
| | - Volkhard May
- Institut für Physik
- Humboldt-Universität zu Berlin
- D-12489 Berlin
- F. R. Germany
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