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Shaya J, Ribierre JC, Correia G, Dappe YJ, Mathevet F, Mager L, Heinrich B, Méry S. Control of the Organization of 4,4'-bis(carbazole)-1,1'-biphenyl (CBP) Molecular Materials through Siloxane Functionalization. Molecules 2023; 28:molecules28052038. [PMID: 36903284 PMCID: PMC10003964 DOI: 10.3390/molecules28052038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/10/2023] [Accepted: 02/16/2023] [Indexed: 02/24/2023] Open
Abstract
We show that through the introduction of short dimethylsiloxane chains, it was possible to suppress the crystalline state of CBP in favor of various types of organization, transitioning from a soft crystal to a fluid liquid crystal mesophase, then to a liquid state. Characterized by X-ray scattering, all organizations reveal a similar layered configuration in which layers of edge-on lying CBP cores alternate with siloxane. The difference between all CBP organizations essentially lay on the regularity of the molecular packing that modulates the interactions of neighboring conjugated cores. As a result, the materials show quite different thin film absorption and emission properties, which could be correlated to the features of the chemical architectures and the molecular organizations.
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Affiliation(s)
- Janah Shaya
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
- Department of Chemistry, College of Arts and Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- College of Medicine and Health Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
| | - Jean-Charles Ribierre
- Service de Physique de l’État Condensé, CEA CNRS UMR 3680, Université Paris Saclay, 91191 Gif-sur-Yvette, France
| | - Gabriel Correia
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - Yannick J. Dappe
- Service de Physique de l’État Condensé, CEA CNRS UMR 3680, Université Paris Saclay, 91191 Gif-sur-Yvette, France
| | - Fabrice Mathevet
- Institut Parisien de Chimie Moléculaire (IPCM), CNRS, Sorbonne University, 4 Place Jussieu, 75005 Paris, France
- Center for Organic Photonics and Electronics Research (OPERA), Department of Applied Chemistry, Kyushu Universty, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
| | - Loïc Mager
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
| | - Benoît Heinrich
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
- Correspondence: (B.H.); (S.M.)
| | - Stéphane Méry
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS, Strasbourg University, UMR 7504, 23 rue du Loess, 67034 Strasbourg, France
- Correspondence: (B.H.); (S.M.)
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2
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Kihal N, Nazemi A, Bourgault S. Supramolecular Nanostructures Based on Perylene Diimide Bioconjugates: From Self-Assembly to Applications. NANOMATERIALS 2022; 12:nano12071223. [PMID: 35407341 PMCID: PMC9000806 DOI: 10.3390/nano12071223] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 03/31/2022] [Accepted: 04/02/2022] [Indexed: 12/18/2022]
Abstract
Self-assembling π-conjugated systems constitute efficient building blocks for the construction of supramolecular structures with tailored functional properties. In this context, perylene diimide (PDI) has attracted attention owing to its chemical robustness, thermal and photo-stability, and outstanding optical and electronic properties. Recently, the conjugation of PDI derivatives to biological molecules, including oligonucleotides and peptides, has opened new avenues for the design of nanoassemblies with unique structures and functionalities. In the present review, we offer a comprehensive summary of supramolecular bio-assemblies based on PDI. After briefly presenting the physicochemical, structural, and optical properties of PDI derivatives, we discuss the synthesis, self-assembly, and applications of PDI bioconjugates.
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Affiliation(s)
- Nadjib Kihal
- Department of Chemistry, Université du Québec, Montreal, QC H2X 2J6, Canada;
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, Quebec City, QC G1V 0A6, Canada
- Centre Québécois sur les Matériaux Fonctionnels/Québec Centre for Advanced Materials, CQMF/QCAM, Montreal, QC H3A 2A7, Canada
| | - Ali Nazemi
- Department of Chemistry, Université du Québec, Montreal, QC H2X 2J6, Canada;
- Centre Québécois sur les Matériaux Fonctionnels/Québec Centre for Advanced Materials, CQMF/QCAM, Montreal, QC H3A 2A7, Canada
- Correspondence: (A.N.); (S.B.)
| | - Steve Bourgault
- Department of Chemistry, Université du Québec, Montreal, QC H2X 2J6, Canada;
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, Quebec City, QC G1V 0A6, Canada
- Correspondence: (A.N.); (S.B.)
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3
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Chen WK, Cui G, Liu XY. Solvent effects on excited-state relaxation dynamics of paddle-wheel BODIPY-Hexaoxatriphenylene conjugates: Insights from non-adiabatic dynamics simulations. CHINESE J CHEM PHYS 2022. [DOI: 10.1063/1674-0068/cjcp2110214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Understanding the excited state dynamics of donor-acceptor (D-A) complexes is of fundamental importance both experimentally and theoretically. Herein, we have first explored the photoinduced dynamics of a recently synthesized paddle-wheel BODIPY-hexaoxatriphenylene (BODIPY is the abbreviation for BF2-chelated dipyrromethenes) conjugates D-A complexes with the combination of both electronic structure calculations and non-adiabatic dynamics simulations. On the basis of computational results, we concluded that the BODIPY-hexaoxatriphenylene (BH) conjugates will be promoted to the local excited (LE) states of the BODIPY fragments upon excitation, which is followed by the ultrafast exciton transfer from LE state to charge transfer (CT). Instead of the photoinduced electron transfer process proposed in previous experimental work, such a exciton transfer process is accompanied with the photoinduced hole transfer from BODIPY to hexaoxatriphenylene. Additionally, solvent effects are found to play an important role in the photoinduced dynamics. Specifically, the hole transfer dynamics is accelerated by the acetonitrile solvent, which can be ascribed to significant influences of the solvents on the charge transfer states, i.e. the energy gaps between LE and CT excitons are reduced greatly and the non-adiabatic couplings are increased in the meantime. Our present work not only provides valuable insights into the underlying photoinduced mechanism of BH, but also can be helpful for the future design of novel donor-acceptor conjugates with better optoelectronic performance.
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Affiliation(s)
- Wen-Kai Chen
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiang-Yang Liu
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu 610068, China
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4
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Li K, Xu DH, Wang X, Liu XY. Ultrafast channel I and channel II charge generation processes at a nonfullerene donor-acceptor PTB7:PDI interface is crucial for its excellent photovoltaic performance. Phys Chem Chem Phys 2021; 23:2097-2104. [PMID: 33434254 DOI: 10.1039/d0cp05362g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nonfullerene organic solar cells have received much attention in recent years due to their low cost, high absorption coefficient and excellent synthetic flexibility. However, the microscopic photoinduced dynamics at corresponding donor-acceptor interfaces remains unclear. In this work, we have firstly employed state-of-the-art TDDFT-based nonadiabatic dynamics simulations in combination with static electronic structure calculations to explore the ultrafast photoinduced dynamics at a typical nonfullerene donor-acceptor PTB7:PDI interface using a minimal model system (172 atoms). Upon excitation with specific wavelength of light, both PTB7 and PDI can be locally excited to generate |PTB7* and |PDI* excitons due to their high absorption ability and significant overlap in absorption spectrum. After that, these localized excitons gradually convert to charge transfer exciton |PTB7+PDI-, while another |PTB7-PDI+ charge transfer exciton is not involved in the whole process. Along with the exciton conversion, electron transfer from PTB7 to PDI (channel I charge generation) and the hole transfer from PDI to PTB7 (channel II charge generation) occurs simultaneously with time constants of 643 fs and 549 fs respectively. In the same time, D index that measures the centroid distance of electron and hole increases from 1.0 Å to 4.0 Å, which clearly reflects a charge transfer process at the interface. Our present work provides solid evidence that both channel I and channel II charge generation processes play important roles at PTB7:PDI interface, which could be helpful for the design of novel nonfullerene solar cells with better photovoltaic performance.
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Affiliation(s)
- Kai Li
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu 610068, China.
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5
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Lehmann M, Hecht M, Herbst S, Cui K, Würthner F. Unfolding multi-stranded perylene bisimide LC columns - a mesogen design for efficient nanoscale multilayer self-assembly. Chem Commun (Camb) 2020; 56:14015-14018. [PMID: 33095218 DOI: 10.1039/d0cc06458k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mesogen tethered, twofold bay-substituted perylene bisimide (PBI) is found to generate a columnar phase, which unfolds and gradually transforms to a completely nanosegregated multilayer columnar-lamellar liquid crystal. The structure is based on the formation of bundles of H-bonded PBI strands in the central layer. This design opens the way to new complex multifunctional materials.
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Affiliation(s)
- Matthias Lehmann
- Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany. and Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
| | - Markus Hecht
- Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany. and Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
| | - Stefanie Herbst
- Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany. and Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
| | - Kang Cui
- Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany.
| | - Frank Würthner
- Institut für Organische Chemie, Am Hubland, 97074 Würzburg, Germany. and Center for Nanosystems Chemistry & Bavarian Polymer Institute, Universität Würzburg, Theodor-Boveri-Weg, 97074 Würzburg, Germany
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6
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Xu F, Testoff TT, Wang L, Zhou X. Cause, Regulation and Utilization of Dye Aggregation in Dye-Sensitized Solar Cells. Molecules 2020; 25:E4478. [PMID: 33003462 PMCID: PMC7582523 DOI: 10.3390/molecules25194478] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 11/16/2022] Open
Abstract
As an important member of third generation solar cell, dye-sensitized solar cells (DSSCs) have the advantages of being low cost, having an easy fabrication process, utilizing rich raw materials and a high-power conversion efficiency (PCE), prompting nearly three decades as a research hotspot. Recently, increasing the photoelectric conversion efficiency of DSSCs has proven troublesome. Sensitizers, as the most important part, are no longer limited to molecular engineering, and the regulation of dye aggregation has become a widely held concern, especially in liquid DSSCs. This review first presents the operational mechanism of liquid and solid-state dye-sensitized solar cells, including the influencing factors of various parameters on device efficiency. Secondly, the mechanism of dye aggregation was explained by molecular exciton theory, and the influence of various factors on dye aggregation was summarized. We focused on a review of several methods for regulating dye aggregation in liquid and solid-state dye-sensitized solar cells, and the advantages and disadvantages of these methods were analyzed. In addition, the important application of quantum computational chemistry in the study of dye aggregation was introduced. Finally, an outlook was proposed that utilizing the advantages of dye aggregation by combining molecular engineering with dye aggregation regulation is a research direction to improve the performance of liquid DSSCs in the future. For solid-state dye-sensitized solar cells (ssDSSCs), the effects of solid electrolytes also need to be taken into account.
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Affiliation(s)
- Fang Xu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300345, China; (F.X.); (L.W.)
| | - Thomas T. Testoff
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University, Carbondale, IL 62901, USA;
| | - Lichang Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300345, China; (F.X.); (L.W.)
- Department of Chemistry and Biochemistry and the Materials Technology Center, Southern Illinois University, Carbondale, IL 62901, USA;
| | - Xueqin Zhou
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300345, China; (F.X.); (L.W.)
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7
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Kim CW, Rhee YM. Toward monitoring the dissipative vibrational energy flows in open quantum systems by mixed quantum-classical simulations. J Chem Phys 2020; 152:244109. [PMID: 32610983 DOI: 10.1063/5.0009867] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
In open quantum system dynamics, rich information about the major energy relaxation channels and corresponding relaxation rates can be elucidated by monitoring the vibrational energy flow among individual bath modes. However, such calculations often become tremendously difficult as the complexity of the subsystem-bath coupling increases. In this paper, we attempt to make this task feasible by using a mixed quantum-classical method, the Poisson-bracket mapping equation with non-Hamiltonian modification (PBME-nH) [H. W. Kim and Y. M. Rhee, J. Chem. Phys. 140, 184106 (2014)]. For a quantum subsystem bilinearly coupled to harmonic bath modes, we derive an expression for the mode energy in terms of the classical positions and momenta of the nuclei, while keeping consistency with the energy of the quantum subsystem. The accuracy of the resulting expression is then benchmarked against a numerically exact method by using relatively simple models. Although our expression predicts a qualitatively correct dissipation rate for a range of situations, cases involving a strong vibronic resonance are quite challenging. This is attributed to the inherent lack of quantum back reaction in PBME-nH, which becomes significant when the subsystem strongly interacts with a small number of bath modes. A rigorous treatment of such an effect will be crucial for developing quantitative simulation methods that can handle generic subsystem-bath coupling.
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Affiliation(s)
- Chang Woo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
| | - Young Min Rhee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
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8
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Fernandes JD, Pazin WM, Aroca RF, Macedo WD, Teixeira SR, Constantino CJL. Photoluminescent properties in perylene PVD films: Influence of molecular aggregates and supramolecular arrangement. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 211:221-226. [PMID: 30544012 DOI: 10.1016/j.saa.2018.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 11/12/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Organic thin films are at the forefront of basic studies and applications in the field of physics, chemistry, biochemistry and materials science. For example, the intrinsic supramolecular arrangement, or simply the formation of aggregates may alter the optical and electrical properties, which would impact the potential applications of the material. Here, an attempt is made to correlate the molecular structures of two perylene derivatives, bis butylimido perylene (BuPTCD) and bis phenethylimido perylene (PhPTCD), with their film formation, in particular, the supramolecular arrangement and the photoluminescent properties. Emission spectra show that the PhPTCD has a radiative efficiency (RE) higher than that for BuPTCD when both are in solutions (monomers). Complementary, regarding PVD films, UV-Vis absorption measurements reveal that PhPTCD forms, predominantly, J aggregates, which are responsible for perylene derivative emission. However, BuPTCD PVD films are found to provide higher RE than PhPTCD PVD film. This apparent controversy could be explained considering other features such as crystallinity and molecular organization. The PVD film of BuPTCD is crystalline while PhPTCD PVD film is amorphous; BuPTCD has an edge-on while PhPTCD has a face-on molecular organization in PVD films.
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Affiliation(s)
- José Diego Fernandes
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil
| | - Wallance Moreira Pazin
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil
| | | | - Wagner Dias Macedo
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil
| | - Silvio Rainho Teixeira
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil
| | - Carlos José Leopoldo Constantino
- Department of Physics, School of Technology and Applied Sciences, São Paulo State University (UNESP), Presidente Prudente, SP, Brazil.
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9
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Jiang S, Xie Y, Lan Z. The role of the charge-transfer states in the ultrafast excitonic dynamics of the DTDCTB dimers embedded in a crystal environment. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.07.044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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10
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Logsdon JL, Hartnett PE, Nelson JN, Harris MA, Marks TJ, Wasielewski MR. Charge Separation Mechanisms in Ordered Films of Self-Assembled Donor-Acceptor Dyad Ribbons. ACS APPLIED MATERIALS & INTERFACES 2017; 9:33493-33503. [PMID: 28430417 DOI: 10.1021/acsami.7b02585] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Orthogonal attachment of polar and nonpolar side-chains to a zinc porphyrin-perylenediimide dyad (ZnP-PDI, 1a) is shown to result in self-assembly of ordered supramolecular ribbons in which the ZnP and PDI molecules form segregated π-stacked columns. Following photoexcitation of the ordered ribbons, ZnP+•-PDI-• radical ion pairs form in <200 fs and subsequently produce a 30 ± 3% yield of free charge carriers that live for about 100 μs. Elongating the side chains on ZnP and PDI in 1b enhances the order of the films, but does not result in an increase in free charge carrier yield. In addition, this yield is independent of temperature, free energy of reaction, and the ZnP-PDI distance in the covalent dyad. These results suggest that the free charge carrier yield in this system is not limited by a bound charge transfer (CT) state or promoted by a vibronically hot CT state. Instead, it is likely that π-stacking of the segregated donors and acceptors within the ribbons results in delocalization of the charges following photoexcitation, allowing them to overcome Coulombic attraction and generate free charge carriers.
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Affiliation(s)
- Jenna L Logsdon
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Patrick E Hartnett
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Jordan N Nelson
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Michelle A Harris
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Tobin J Marks
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
| | - Michael R Wasielewski
- Department of Chemistry, Argonne-Northwestern Solar Energy Research (ANSER) Center, and Institute for Sustainability and Energy at Northwestern, Northwestern University , Evanston, Illinois 60208-3113, United States
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11
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Roy K, Kayal S, Ravi Kumar V, Beeby A, Ariese F, Umapathy S. Understanding Ultrafast Dynamics of Conformation Specific Photo-Excitation: A Femtosecond Transient Absorption and Ultrafast Raman Loss Study. J Phys Chem A 2017; 121:6538-6546. [DOI: 10.1021/acs.jpca.7b03893] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Khokan Roy
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Surajit Kayal
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Venkatraman Ravi Kumar
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Andrew Beeby
- Department
of Chemistry, University of Durham, South Road, Durham DH1 3LE, U.K
| | - Freek Ariese
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
- LaserLaB, VU University Amsterdam, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands
| | - Siva Umapathy
- Department
of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
- Department
of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, 560012, India
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12
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Austin A, Hestand NJ, McKendry IG, Zhong C, Zhu X, Zdilla MJ, Spano FC, Szarko JM. Enhanced Davydov Splitting in Crystals of a Perylene Diimide Derivative. J Phys Chem Lett 2017; 8:1118-1123. [PMID: 28195742 DOI: 10.1021/acs.jpclett.7b00283] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report the polarized absorption spectra of high-quality, thin crystals of a perylene diimide (PDI) species with branched side chains (B2). The absorption spectrum shows exemplary polarization-dependent H-like and J-like aggregate behavior upon orthogonal excitation, with a sizable Davydov splitting (DS) of 1230 cm-1 and peak to peak splitting of 3040 cm-1. The experimental results are compared to theoretical calculations with remarkable agreement. The theoretical analysis of the polarized absorption spectra shows evidence of a high degree of intermolecular charge transfer, which, along with Coulombic coupling, conspires to create the unprecedented DS for this family of dye molecules. The large polarization dependence of the electronic spectra is attributed to the unique twisted crystal structure, in which a substantial rotational displacement exists between neighboring chromophores within a π-stack. These results highlight the strong sensitivity of the Davydov splitting to intermolecular geometry in PDI systems.
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Affiliation(s)
- Ashli Austin
- Department of Chemistry, Lafayette College , Easton, Pennsylvania 18042, United States
| | | | | | | | - Xuanyu Zhu
- Department of Chemistry, Lafayette College , Easton, Pennsylvania 18042, United States
| | | | | | - Jodi M Szarko
- Department of Chemistry, Lafayette College , Easton, Pennsylvania 18042, United States
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13
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Mortuza SM, Banerjee S. Atomistic modelling – impact and opportunities in thin-film photovoltaic solar cell technologies. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2017.1295455] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- S. M. Mortuza
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, USA
| | - Soumik Banerjee
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA, USA
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14
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Wei W, Liu D, Wei Z, Zhu Y. Short-Range π–π Stacking Assembly on P25 TiO2 Nanoparticles for Enhanced Visible-Light Photocatalysis. ACS Catal 2016. [DOI: 10.1021/acscatal.6b03064] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Weiqin Wei
- Department of Chemistry, Tsinghua University, Beijing, 100084, People’s Republic of China
| | - Di Liu
- Department of Chemistry, Tsinghua University, Beijing, 100084, People’s Republic of China
| | - Zhen Wei
- Department of Chemistry, Tsinghua University, Beijing, 100084, People’s Republic of China
| | - Yongfa Zhu
- Department of Chemistry, Tsinghua University, Beijing, 100084, People’s Republic of China
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15
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Tamura H. Diabatization for Time-Dependent Density Functional Theory: Exciton Transfers and Related Conical Intersections. J Phys Chem A 2016; 120:9341-9347. [PMID: 27801581 DOI: 10.1021/acs.jpca.6b09854] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Intermolecular exciton transfers and related conical intersections are analyzed by diabatization for time-dependent density functional theory. The diabatic states are expressed as a linear combination of the adiabatic states so as to emulate the well-defined reference states. The singlet exciton coupling calculated by the diabatization scheme includes contributions from the Coulomb (Förster) and electron exchange (Dexter) couplings. For triplet exciton transfers, the Dexter coupling, charge transfer integral, and diabatic potentials of stacked molecules are calculated for analyzing direct and superexchange pathways. We discuss some topologies of molecular aggregates that induce conical intersections on the vanishing points of the exciton coupling, namely boundary of H- and J-aggregates and T-shape aggregates, as well as canceled exciton coupling to the bright state of H-aggregate, i.e., selective exciton transfer to the dark state. The diabatization scheme automatically accounts for the Berry phase by fixing the signs of reference states while scanning the coordinates.
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Affiliation(s)
- Hiroyuki Tamura
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo , 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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16
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Kim YJ, Lee YJ, Kim YH, Park CE. Isoindigo-based polymer photovoltaics: modifying polymer molecular structures to control the nanostructural packing motif. Phys Chem Chem Phys 2016; 18:17957-64. [PMID: 27326694 DOI: 10.1039/c6cp03273g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Donor molecular structures, and their packing aspects in donor:acceptor active blends, play a crucial role in the photovoltaic performance of polymer solar cells. We systematically investigated a series of isoindigo-based donor polymers within the framework of a three-dimensional (3D) crystalline motif by modifying their chemical structures, thereby affecting device performances. Although our isoindigo-based polymer series contained polymers that differed only by their alkyl side chains and/or donating units, they showed quite different nanoscale morphological properties, which resulted in significantly different device efficiencies. Notably, blends of our isoindigo-based donor polymer systems with an acceptor compound, whereby the blends had more intermixed network morphologies and stronger face-on orientations of the polymer crystallites, provided better-performing photovoltaic devices. This behavior was analyzed using atomic force microscopy (AFM) and two-dimensional grazing incidence wide angle X-ray diffraction (2D-GIWAXD). To the best of our knowledge, no correlation has been reported previously between 3D nano-structural donor crystallites and device performances, particularly for isoindigo-based polymer systems.
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Affiliation(s)
- Yu Jin Kim
- POSTECH Organic Electronics Laboratory, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea.
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Liu L, Eisenbrandt P, Roland T, Polkehn M, Schwartz PO, Bruchlos K, Omiecienski B, Ludwigs S, Leclerc N, Zaborova E, Léonard J, Méry S, Burghardt I, Haacke S. Controlling charge separation and recombination by chemical design in donor–acceptor dyads. Phys Chem Chem Phys 2016; 18:18536-48. [DOI: 10.1039/c6cp00644b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Conjugated donor–acceptor block co-oligomers that self-organize into D–A mesomorphic arrays have raised increasing interest due to their potential applications in organic solar cells.
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18
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Lee KJ, Woo JH, Xiao Y, Kim E, Mazur LM, Kreher D, Attias AJ, Matczyszyn K, Samoc M, Heinrich B, Méry S, Fages F, Mager L, D'Aléo A, Wu JW, Mathevet F, André P, Ribierre JC. Structure–charge transfer property relationship in self-assembled discotic liquid-crystalline donor–acceptor dyad and triad thin films. RSC Adv 2016. [DOI: 10.1039/c6ra08039a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Dynamics of the photo-induced charge transfer are correlated with the structural properties of self-assembled discotic donor–acceptor dyad and triad films.
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