1
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Wang Z, Xie X, Ma H. Simultaneous Intra- and Intermolecular Singlet Fission in Bipentacene Macrocycle Aggregates. J Phys Chem Lett 2024; 15:3523-3530. [PMID: 38522085 DOI: 10.1021/acs.jpclett.4c00300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Singlet fission (SF) is a process where a singlet state splits into two triplet states, which is essential for enhancing optoelectronic devices. Macrocyclic structures allow for precise control of chromophore orientation and facilitate singlet fission in solutions. However, the behavior of these structures in thin films, crucial for solid-state device optimization, remains underexplored. This study examines the aggregation and singlet fission processes of bipentacene macrocycles (BPc) in thin films using molecular dynamics simulations and electronic structure calculations. Findings indicate that BPc aggregates more rapidly with less chloroform, aligning parallel to the substrate. Intramolecular singlet fission (iSF) rates are rarely changed during evaporation, but the efficiency of intermolecular singlet fission (xSF) improves due to the increase in packing domains, suggesting that orderly crystal domains are not necessary for device efficiency. This opens avenues for varied device designs and traditional solution-based methods for optimal device development.
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Affiliation(s)
- Zhangxia Wang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, China
| | - Xiaoyu Xie
- Qingdao Institute for Theoretical and Computational Sciences, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Haibo Ma
- Qingdao Institute for Theoretical and Computational Sciences, School of Chemistry and Chemical Engineering, Shandong University, Qingdao, Shandong 266237, China
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2
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Ye L, Zhao Y, Xu R, Li S, Zhang C, Li H, Zhu H. Above 100% Efficiency Photocharge Generation in Monolayer Semiconductors by Singlet Fission Sensitization. J Am Chem Soc 2023; 145:26257-26265. [PMID: 37994880 DOI: 10.1021/jacs.3c09119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Sensitizing inorganic semiconductors using singlet fission (SF) materials, which produce two excitons from one absorbed photon, can potentially boost their light-to-electricity conversion efficiency. The SF sensitization is particularly exciting for two-dimensional (2D) layered semiconductors with atomically flat surface and high carrier mobility but limited light absorption. However, efficiently harnessing triplet excitons from SF by charge transfer at organic/inorganic interface has been challenging, and the intricate interplay among competing processes remains unresolved. Here, we investigate SF sensitization in high-quality organic/2D bilayer heterostructures featuring TIPS-Pc single crystals. Through transient magneto-optical spectroscopy, we demonstrate that despite an ultrafast SF process in sub-100 fs, a significant fraction of singlet excitons in TIPS-Pc dissociate at the interface before fission, while triplet excitons from SF undergo diffusion-limited charge transfer at the interface in ∼10 ps to ns. Remarkably, the photocharge generation efficiency reaches 126% in heterostructures with optimal thickness, resulting from the competitive interplay between singlet exciton fission, dissociation, and triplet exciton transport. This presents a promising strategy for advancing SF-enhanced 2D optoelectronics beyond the conventional limits.
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Affiliation(s)
- Lei Ye
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Yujie Zhao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
| | - Rong Xu
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210046, China
| | - Shuangshuang Li
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, School of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210046, China
| | - Hanying Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China
| | - Haiming Zhu
- Key Laboratory of Excited-State Materials of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311215, China
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3
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He G, Parenti KR, Budden PJ, Niklas J, Macdonald T, Kumarasamy E, Chen X, Yin X, McCamey DR, Poluektov OG, Campos LM, Sfeir MY. Unraveling Triplet Formation Mechanisms in Acenothiophene Chromophores. J Am Chem Soc 2023; 145:22058-22068. [PMID: 37787467 DOI: 10.1021/jacs.3c07082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
The evolution of molecular platforms for singlet fission (SF) chromophores has fueled the quest for new compounds capable of generating triplets quantitatively at fast time scales. As the exploration of molecular motifs for SF has diversified, a key challenge has emerged in identifying when the criteria for SF have been satisfied. Here, we show how covalently bound molecular dimers uniquely provide a set of characteristic optical markers that can be used to distinguish triplet pair formation from processes that generate an individual triplet. These markers are contained within (i) triplet charge-transfer excited state absorption features, (ii) kinetic signatures of triplet-triplet annihilation processes, and (iii) the modulation of triplet formation rates using bridging moieties between chromophores. Our assignments are verified by time-resolved electron paramagnetic resonance (EPR) measurements, which directly identify triplet pairs by their electron spin and polarization patterns. We apply these diagnostic criteria to dimers of acenothiophene derivatives in solution that were recently reported to undergo efficient intermolecular SF in condensed media. While the electronic structure of these heteroatom-containing chromophores can be broadly tuned, the effect of their enhanced spin-orbit coupling and low-energy nonbonding orbitals on their SF dynamics has not been fully determined. We find that SF is fast and efficient in tetracenothiophene but that anthradithiophene exhibits fast intersystem crossing due to modifications of the singlet and triplet excited state energies upon functionalization of the heterocycle. We conclude that it is not sufficient to assign SF based on comparisons of the triplet formation kinetics between monomer and multichromophore systems.
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Affiliation(s)
- Guiying He
- Department of Physics, Graduate Center, City University of New York, New York, New York 10016, United States
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, New York 10031, United States
| | - Kaia R Parenti
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Peter J Budden
- Department of Physics, Graduate Center, City University of New York, New York, New York 10016, United States
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, New York 10031, United States
| | - Jens Niklas
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Thomas Macdonald
- ARC Centre of Excellence in Exciton Science, School of Physics, UNSW Sydney, Sydney, 2052 NSW, Australia
| | - Elango Kumarasamy
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Xing Chen
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
| | - Xiaodong Yin
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China
| | - Dane R McCamey
- ARC Centre of Excellence in Exciton Science, School of Physics, UNSW Sydney, Sydney, 2052 NSW, Australia
| | - Oleg G Poluektov
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Luis M Campos
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Matthew Y Sfeir
- Department of Physics, Graduate Center, City University of New York, New York, New York 10016, United States
- Photonics Initiative, Advanced Science Research Center, City University of New York, New York, New York 10031, United States
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4
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Attwood M, Xu X, Newns M, Meng Z, Ingle RA, Wu H, Chen X, Xu W, Ng W, Abiola TT, Stavros VG, Oxborrow M. N-Heteroacenes as an Organic Gain Medium for Room-Temperature Masers. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2023; 35:4498-4509. [PMID: 37332679 PMCID: PMC10268955 DOI: 10.1021/acs.chemmater.3c00640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/04/2023] [Indexed: 06/20/2023]
Abstract
The development of future quantum devices such as the maser, i.e., the microwave analog of the laser, could be well-served by the exploration of chemically tunable organic materials. Current iterations of room-temperature organic solid-state masers are composed of an inert host material that is doped with a spin-active molecule. In this work, we systematically modulated the structure of three nitrogen-substituted tetracene derivatives to augment their photoexcited spin dynamics and then evaluated their potential as novel maser gain media by optical, computational, and electronic paramagnetic resonance (EPR) spectroscopy. To facilitate these investigations, we adopted an organic glass former, 1,3,5-tri(1-naphthyl)benzene to act as a universal host. These chemical modifications impacted the rates of intersystem crossing, triplet spin polarization, triplet decay, and spin-lattice relaxation, leading to significant consequences on the conditions required to surpass the maser threshold.
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Affiliation(s)
- Max Attwood
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
| | - Xiaotian Xu
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
| | - Michael Newns
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
| | - Zhu Meng
- Molecular
Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, U.K.
| | - Rebecca A. Ingle
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
| | - Hao Wu
- Center
for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic
Quantum Architecture and Measurements, School of Physics, Beijing Institute of Technology, Beijing 100081, China
| | - Xi Chen
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
- Department
of Computer Science, University of Southern
California, Los Angeles, California 90089, United States
| | - Weidong Xu
- Molecular
Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, London W12 0BZ, U.K.
| | - Wern Ng
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
| | - Temitope T. Abiola
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto M5S 3H6, Canada
| | | | - Mark Oxborrow
- Department
of Materials, Imperial College London, South Kensington Campus, Exhibition
Road, London SW7 2AZ, U.K.
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5
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Zhou J, Liu H, Liu S, Su P, Wang W, Li Z, Liu Z, Chen Y, Dong Y, Li X. Singlet Fission in Colloidal Nanoparticles of Amphipathic Diketopyrrolopyrrole Derivatives: Probing the Role of the Charge Transfer State. J Phys Chem B 2022; 126:6483-6492. [PMID: 35979942 DOI: 10.1021/acs.jpcb.2c03163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To evaluate the role of the charge transfer (CT) state in the singlet fission (SF) process, we prepared three 3,6-bis(thiophen-2-yl)diketopyrrolopyrrole (TDPP) derivatives with zero (Ph2TDPP), one (Ph2TDPP-COOH), and two (Ph2TDPP-(COOH)2) carboxylic groups, respectively. Their colloidal nanoparticles were also prepared by a simple precipitation method. The SF dynamics and mechanism in these colloid nanoparticles were investigated by using steady-state/transient absorption and fluorescence spectroscopy. Steady-state absorption spectra reveal that the strength of the CT resonance interactions between the adjacent DPP units is increased gradually from Ph2TDPP to Ph2TDPP-COOH and then to Ph2TDPP-(COOH)2. Fluorescence and transient absorption spectra demonstrate that SF is proceeded via a CT-assisted superexchange mechanism in these three nanoparticles. Furthermore, SF rate and yield are enhanced gradually with the increase of the number of the carboxylic group, which may be attributed to the enhancement of the CT coupling strength. The result of this work not only provides a better understanding of the SF mechanism especially for the role of the CT state but also gives some new insights for the design of efficient SF materials based on DPP derivatives.
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Affiliation(s)
- Jun Zhou
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Heyuan Liu
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China.,National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Shanshan Liu
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Pengkun Su
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Weijie Wang
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Zhi Li
- Shandong Energy Group Co., Ltd., Jinan, Shandong 250014, China
| | - Zhaobin Liu
- Shandong Energy Group Co., Ltd., Jinan, Shandong 250014, China
| | - Yanli Chen
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Yunqin Dong
- College of Chemical Engineering and Materials Science, Zaozhuang University, Zaozhuang 277160, China
| | - Xiyou Li
- College of Chemical Engineering, School of Materials Science and Engineering, College of New Energy, China University of Petroleum (East China), Qingdao, Shandong 266580, China
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6
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Fan S, Li W, Li T, Gao F, Hu W, Liu S, Wang X, Liu H, Liu Z, Li Z, Chen Y, Li X. Singlet fission in colloid nanoparticles of amphipathic 9,10-bis(phenylethynyl)anthracene derivatives. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Climent C, Casanova D, Feist J, Garcia-Vidal FJ. Not dark yet for strong light-matter coupling to accelerate singlet fission dynamics. CELL REPORTS. PHYSICAL SCIENCE 2022; 3:100841. [PMID: 35620360 PMCID: PMC9022090 DOI: 10.1016/j.xcrp.2022.100841] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 02/25/2022] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Polaritons are unique hybrid light-matter states that offer an alternative way to manipulate chemical processes. In this work, we show that singlet fission dynamics can be accelerated under strong light-matter coupling. For superexchange-mediated singlet fission, state mixing speeds up the dynamics in cavities when the lower polariton is close in energy to the multiexcitonic state. This effect is more pronounced in non-conventional singlet fission materials in which the energy gap between the bright singlet exciton and the multiexcitonic state is large ( > 0.1 eV). In this case, the dynamics is dominated by the polaritonic modes and not by the bare-molecule-like dark states, and, additionally, the resonant enhancement due to strong coupling is robust even for energetically broad molecular states. The present results provide a new strategy to expand the range of suitable materials for efficient singlet fission by making use of strong light-matter coupling.
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Affiliation(s)
- Clàudia Climent
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - David Casanova
- Donostia International Physics Centre (DIPC), 20018 Donostia, Euskadi, Spain
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Euskadi, Spain
| | - Johannes Feist
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Francisco J. Garcia-Vidal
- Departamento de Física Teórica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute of High Performance Computing, Agency for Science, Technology, and Research (A∗STAR), Connexis, 138632, Singapore
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8
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Mathew CM, Varghese A, Sugunan SK, Thomas VI. Rapid Computational Approach Towards Designing Singlet-Fission Chromophores by Tuning the Diradical Character of Heteroatom-Doped Polycyclic Aromatic Hydrocarbons Using the Atom-Specific Fukui Function. J Phys Chem A 2022; 126:1579-1590. [PMID: 35258970 DOI: 10.1021/acs.jpca.1c08094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Singlet fission (SF) is proposed as a promising method to circumvent the Shockley-Queisser threshold of single junction photovoltaics. Progress towards realizing efficient SF-based devices has been impeded by the fact that only a handful of molecules and their derivatives practically exhibit efficient SF. In the present work, we demonstrate a TDDFT-based rapid and cost-effective computational approach for designing SF chromophores by doping various atomic sites (substituting carbon atoms) of polycyclic aromatic hydrocarbons with nitrogen, phosphorus, and silicon. We establish a hitherto unexplored, direct correlation between the atom-specific chemical reactivity parameter─Fukui function─of these molecules with their frontier molecular orbital energies, diradical characters, and vertical singlet and triplet excitation energies. These quantitative correlations show exactly opposite trends for nitrogen-doped molecules and phosphorus- or silicon-doped molecules. The doped derivatives that have the Fukui function falling in a range of 0.03-0.14 possess the required intermediate diradical character and suitable singlet-triplet energies to qualify for SF candidature. Our findings enable one, at reasonable computational times and cost, to easily assess the doping criteria and to develop design rules for SF molecules in particular and for diradicaloids in general.
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Affiliation(s)
- Christina Mariam Mathew
- Department of Chemistry, CMS College Kottayam (Autonomous) (Mahatma Gandhi University), Kottayam 686001, Kerala, India.,Department of Chemistry, Baselius College Kottayam (Mahatma Gandhi University), Kottayam 686001, Kerala, India
| | - Ann Varghese
- Department of Chemistry, CMS College Kottayam (Autonomous) (Mahatma Gandhi University), Kottayam 686001, Kerala, India
| | - Sunish K Sugunan
- Department of Chemistry, CMS College Kottayam (Autonomous) (Mahatma Gandhi University), Kottayam 686001, Kerala, India
| | - Vibin Ipe Thomas
- Department of Chemistry, CMS College Kottayam (Autonomous) (Mahatma Gandhi University), Kottayam 686001, Kerala, India.,Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686560, Kerala, India
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9
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Fei X, Zhang S, Zhai D, Wang Z, Lin JL, Xiao Q, Sun CL, Deng W, Zhang C, Hu W, Zhang HL. Flavanthrene derivatives as photostable and efficient singlet exciton fission materials. Chem Sci 2022; 13:9914-9920. [PMID: 36128249 PMCID: PMC9430411 DOI: 10.1039/d2sc00263a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 07/14/2022] [Indexed: 11/21/2022] Open
Abstract
Singlet exciton fission (SF) is believed to have the potential to break the Shockley−Quiesser third-generation solar cell devices, so that attracted great attention. Conventional linear acene based SF materials generally...
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Affiliation(s)
- Xian Fei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - San Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 China
| | - Dong Zhai
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University Qingdao 266237 China
| | - Zhiwei Wang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 China
| | - Jin-Liang Lin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Qi Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Chun-Lin Sun
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
| | - Weiqiao Deng
- Institute of Molecular Sciences and Engineering, Institute of Frontier and Interdisciplinary Science, Shandong University Qingdao 266237 China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, School of Physics, Nanjing University Nanjing 210093 China
| | - Wenping Hu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Institute of Molecular Aggregation Science, Tianjin University 300072 Tianjin China
| | - Hao-Li Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000 China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, School of Science, Institute of Molecular Aggregation Science, Tianjin University 300072 Tianjin China
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10
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Ghosh A, Budanovic M, Li T, Liang C, Klein M, Soci C, Webster RD, Gurzadyan GG, Grimsdale AC. Synthesis of 5‐Azatetracene and Comparison of Its Optical and Electrochemical Properties with Tetracene. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Animesh Ghosh
- School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Maja Budanovic
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Tianjiao Li
- Institute of Artificial Photosynthesis State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 P. R. China
| | - Caihong Liang
- School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
| | - Maciej Klein
- Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
- Energy Research Institute @ NTU (ERI@N) Research Techno Plaza Nanyang Technological University 50 Nanyang Drive 637553 Singapore
| | - Cesare Soci
- Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Richard D. Webster
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Gagik G. Gurzadyan
- Institute of Artificial Photosynthesis State Key Laboratory of Fine Chemicals Dalian University of Technology 2 Linggong Road Dalian 116024 P. R. China
| | - Andrew C. Grimsdale
- School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore
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11
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Sun K, Liu X, Hu W, Zhang M, Long G, Zhao Y. Singlet fission dynamics and optical spectra of pentacene and its derivatives. Phys Chem Chem Phys 2021; 23:12654-12667. [PMID: 34036985 DOI: 10.1039/d1cp00563d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A multimode Brownian oscillator model is employed to investigate the absorption spectra of pentacene and its derivatives in solution and thin films. Excellent agreement has been obtained between simulated and measured absorption spectra. Furthermore, using parameters obtained from fitting the absorption spectra of these pentacene derivatives, the singlet fission dynamics and two-dimensional electronic spectra of an ab initio Hamiltonian are investigated by Dirac-Frenkel time-dependent variation with multiple Davydov trial states. It is found that the periodic wave packet motion induced in the displaced excited state, and the accompanying vibrational relaxation, can be visualized by two-dimensional electronic spectra at short times.
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Affiliation(s)
- Kewei Sun
- School of Science, Hangzhou Dianzi University, Hangzhou 310018, China
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12
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Karlsson JKG, Atahan A, Harriman A, Tkachenko NV, Ward AD, Schaberle FA, Serpa C, Arnaut LG. Singlet Exciton Fission and Associated Enthalpy Changes with a Covalently Linked Bichromophore Comprising TIPS-Pentacenes Held in an Open Conformation. J Phys Chem A 2021; 125:1184-1197. [DOI: 10.1021/acs.jpca.0c09961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joshua K. G. Karlsson
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Alparslan Atahan
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Anthony Harriman
- Molecular Photonics Laboratory, School of Natural and Environmental Sciences, Newcastle University, Bedson Building, Newcastle upon Tyne NE1 7RU, U.K
| | - Nikolai V. Tkachenko
- Faculty of Engineering and Natural Sciences, Tampere University, Koereakoulunkatu 7, FIN-33720 Tampere, Finland
| | - Andrew D. Ward
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Didcot OX11 0FA, U.K
| | - Fabio A. Schaberle
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Carlos Serpa
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Luis G. Arnaut
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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13
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Abstract
Singlet fission (SF) is a photophysical downconversion pathway, in which a singlet excitation transforms into two triplet excited states. As such, it constitutes an exciton multiplication generation process, which is currently at the focal point for future integration into solar energy conversion devices. Beyond this, various other exciting applications were proposed, including quantum cryptography or organic light emitting diodes. Also, the mechanistic understanding evolved rapidly during the last year. Unfortunately, the number of suitable SF-chromophores is still limited. This is per se problematic, considering the wide range of envisaged applicability. With that in mind, we emphasize uncommon SF-scaffolds and outline requirements as well as strategies to expand the chromophore pool of SF-materials.
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Affiliation(s)
- Tobias Ullrich
- Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Department für Chemie und Pharmazie, Egerlandstr. 1-3, 91058 Erlangen, Germany.
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14
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Paul S, Govind C, Karunakaran V. Planarity and Length of the Bridge Control Rate and Efficiency of Intramolecular Singlet Fission in Pentacene Dimers. J Phys Chem B 2020; 125:231-239. [PMID: 33371685 DOI: 10.1021/acs.jpcb.0c08590] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Singlet fission (SF) improves the power conversion efficiency of optoelectronic devices by converting high-energy photons into two triplet excitons. SF dynamics and efficiency (Φ) are controlled by various factors. Here, the effect of planarity and length of the bridge in pentacene dimers on the intramolecular SF (iSF) process was investigated by synthesizing the dimers connected by bridges having fluorene (FL-PD, planar), methyl-substituted biphenyl (MBP-PD, twisted), and diphenyl acetylene (DPA-PD, longer) groups and characterizing their excited-state relaxation dynamics using nanosecond and femtosecond pump-probe spectroscopy. Transient absorption studies reveal that iSF dynamics of FL-PD having a planar bridge are ∼787 times faster (187 ps) and exhibit higher Φ (198%) by feasible electronic coupling, compared to MBP-PD possessing a twisted bridge showing a low Φ of ∼16%. However compared to FL-PD, iSF dynamics of DPA-PD with an increase of bridge length are slower by an order (1.09 ns) and show comparable Φ of 185% through extended conjugation. Thus, the planarity and length of the bridge in pentacene dimers control the rate and efficiency of the iSF process.
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Affiliation(s)
- Sumitha Paul
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019 Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre, Ghaziabad, Uttar Pradesh 201 002, India
| | - Chinju Govind
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019 Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre, Ghaziabad, Uttar Pradesh 201 002, India
| | - Venugopal Karunakaran
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019 Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre, Ghaziabad, Uttar Pradesh 201 002, India
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15
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Alipour M, Safari Z. Singlet fission relevant energetics from optimally tuned range-separated hybrids. Phys Chem Chem Phys 2020; 22:27060-27076. [PMID: 33215617 DOI: 10.1039/d0cp03951a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As a promising idea to design high-efficiency organic photovoltaics, singlet fission (SF) mechanism, i.e., generating two triplet excitons out of a single photon absorption, has recently come into the spotlight. Even though much effort has been devoted to this arena, accurately accounting for the SF process from the theoretical perspective has proven to be challenging. Herein, the SF energetics have thoroughly been investigated with the help of optimally tuned range-separated hybrid functionals (OT-RSHs) in both gas and solvent phases. Taking a series of experimentally known SF chromophores as working models, we have proposed and validated several variants of OT-RSH approximations for the reliable prediction of the energy levels which match the crucial criteria for the SF process, namely, the negative singlet-triplet and triplet-triplet energy gaps. We scrutinize the role of the OT-RSH ingredients, i.e., the underlying density functional approximations, short- and long-range exact-like exchange, as well as the range-separation parameter, for our purpose. The newly designed OT-RSHs outperform the standard RSHs and other related schemes such as screened-exchange approximations as well as other density functionals from different rungs for describing the SF energetics. More importantly, it is unveiled that although the OT-RSH coupled with the polarizable continuum model, OT-RSH-PCM, as well as the screened versions, OT-SRSHs, which account for the screening effect by the electron correlation through the scalar dielectric constant have some advantages over gas-phase computations using OT-RSHs, the energetics criteria of the SF process may not necessarily be satisfied. This in turn corroborates the idea of performing both the optimal tuning procedure and subsequent computations of the SF relevant energetics using OT-RSHs as a more reliable and affordable framework, at least for the present purpose. The applicability of the proposed models is also put into broader perspective, where they are used for the computational design of several chromophores as promising candidates prone to utilization in the SF-based materials. Hopefully, our recommended OT-RSHs can function as efficient models for both the theoretical modeling of SF chromophores and confirming the experimental observations in the field.
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Affiliation(s)
- Mojtaba Alipour
- Department of Chemistry, School of Science, Shiraz University, Shiraz 71946-84795, Iran.
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16
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Gish MK, Thorley KJ, Parkin SR, Anthony JE, Johnson JC. Hydrogen Bonding Optimizes Singlet Fission in Carboxylic Acid Functionalized Anthradithiophene Films. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Melissa K. Gish
- Chemistry and Nanoscience Center National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA
| | - Karl J. Thorley
- Department of Chemistry University of Kentucky Lexington, Kentucky 40506 USA
| | - Sean R. Parkin
- Department of Chemistry University of Kentucky Lexington, Kentucky 40506 USA
| | - John E. Anthony
- Department of Chemistry University of Kentucky Lexington, Kentucky 40506 USA
| | - Justin C. Johnson
- Chemistry and Nanoscience Center National Renewable Energy Laboratory 15013 Denver West Parkway Golden CO 80401 USA
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17
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Alagna N, Lustres JLP, Roozbeh A, Han J, Hahn S, Berger FJ, Zaumseil J, Dreuw A, Bunz UHF, Buckup T. Ultrafast Singlet Fission in Rigid Azaarene Dimers with Negligible Orbital Overlap. J Phys Chem B 2020; 124:9163-9174. [DOI: 10.1021/acs.jpcb.0c07096] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Nicolò Alagna
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Jose Luis Pérez Lustres
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Ashkan Roozbeh
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Jie Han
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Sebastian Hahn
- Organisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Felix J. Berger
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Jana Zaumseil
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Uwe H. F. Bunz
- Organisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Tiago Buckup
- Physikalisch Chemisches Institut, Universität Heidelberg, D-69120 Heidelberg, Germany
- Centre for Advanced Materials, Universität Heidelberg, D-69120 Heidelberg, Germany
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18
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Xue L, Song X, Feng Y, Cheng S, Lu G, Bu Y. General Dual-Switched Dynamic Singlet Fission Channels in Solvents Governed Jointly by Chromophore Structural Dynamics and Solvent Impact: Singlet Prefission Energetics Analyses. J Am Chem Soc 2020; 142:17469-17479. [DOI: 10.1021/jacs.0c06919] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Lijuan Xue
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
| | - Xinyu Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
| | - Yiwei Feng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
| | - Shibo Cheng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
| | - Gang Lu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People’s Republic of China
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19
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Li Q, Kan YH, Xu HL, Su ZM. Hydrogen Migration-Triggered Diradicaloid Singlet-Fission Switch. J Am Chem Soc 2020; 142:11791-11803. [DOI: 10.1021/jacs.0c02778] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Qing Li
- Institute of Functional Material Chemistry, National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
- Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai’an 223300, P. R. China
- Department of Chemistry, Faculty of Science, Yanbian University, Yanji 133002, P. R. China
| | - Yu-He Kan
- Institute of Functional Material Chemistry, National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
- Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai’an 223300, P. R. China
| | - Hong-Liang Xu
- Institute of Functional Material Chemistry, National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry, National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130024, P. R. China
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20
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The Photophysical Properties of Triisopropylsilyl-ethynylpentacene—A Molecule with an Unusually Large Singlet-Triplet Energy Gap—In Solution and Solid Phases. CHEMISTRY-SWITZERLAND 2020. [DOI: 10.3390/chemistry2020033] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The process of singlet-exciton fission (SEF) has attracted much attention of late. One of the most popular SEF compounds is TIPS-pentacene (TIPS-P, where TIPS = triisopropylsilylethynyl) but, despite its extensive use as both a reference and building block, its photophysical properties are not so well established. In particular, the triplet state excitation energy remains uncertain. Here, we report quantitative data and spectral characterization for excited-singlet and -triplet states in dilute solution. The triplet energy is determined to be 7940 ± 1200 cm−1 on the basis of sensitization studies using time-resolved photoacoustic calorimetry. The triplet quantum yield at the limit of low concentration and low laser intensity is only ca. 1%. Self-quenching occurs at high solute concentration where the fluorescence yield and lifetime decrease markedly relative to dilute solution but we were unable to detect excimer emission by steady-state spectroscopy. Short-lived fluorescence, free from excimer emission or phosphorescence, occurs for crystals of TIPS-P, most likely from amorphous domains.
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21
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Merz J, Dietz M, Vonhausen Y, Wöber F, Friedrich A, Sieh D, Krummenacher I, Braunschweig H, Moos M, Holzapfel M, Lambert C, Marder TB. Synthesis, Photophysical and Electronic Properties of New Red-to-NIR Emitting Donor-Acceptor Pyrene Derivatives. Chemistry 2020; 26:438-453. [PMID: 31593316 PMCID: PMC6973242 DOI: 10.1002/chem.201904219] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Indexed: 02/03/2023]
Abstract
We synthesized new pyrene derivatives with strong bis(para-methoxyphenyl)amine donors at the 2,7-positions and n-azaacene acceptors at the K-region of pyrene. The compounds possess a strong intramolecular charge transfer, leading to unusual properties such as emission in the red to NIR region (700 nm), which has not been reported before for monomeric pyrenes. Detailed photophysical studies reveal very long intrinsic lifetimes of >100 ns for the new compounds, which is typical for 2,7-substituted pyrenes but not for K-region substituted pyrenes. The incorporation of strong donors and acceptors leads to very low reduction and oxidation potentials, and spectroelectrochemical studies show that the compounds are on the borderline between localized Robin-Day class-II and delocalized Robin-Day class-III species.
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Affiliation(s)
- Julia Merz
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Maximilian Dietz
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Yvonne Vonhausen
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Frederik Wöber
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Daniel Sieh
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Holger Braunschweig
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Michael Moos
- Institut für Organische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Marco Holzapfel
- Institut für Organische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Christoph Lambert
- Institut für Organische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische Chemie andInstitute for Sustainable Chemistry & Catalysis with Boron (ICB)Julius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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22
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Sun CL, Luo XE, Xu H, Song QW, Fan ZP, Wang XZ, Cao JJ, Shi ZF, Zhang HL. Aromaticity and tautomerism of a 4n π electron dihydrohexaazapentacene. Org Chem Front 2020. [DOI: 10.1039/c9qo01285k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report herein the intriguing tautomerism behaviors of new dihydrohexaazapentacene derivatives. The dihydrohexaazapentacene molecules with 4n π electrons exist as two stable tautomers in solution and exhibits globe aromaticity.
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Affiliation(s)
- Chun-Lin Sun
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Xiao-E Luo
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Huan Xu
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Qi-Wei Song
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Zhi-Ping Fan
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Xiao-Zhen Wang
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Jing-Jing Cao
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Zi-Fa Shi
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
| | - Hao-Li Zhang
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry(SKLAOC)
- Key Laboratory of Special Function Materials and Structure Design (MOE)
- Lanzhou University
- Lanzhou
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23
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Sanders SN, Kumarasamy E, Fallon KJ, Sfeir MY, Campos LM. Singlet fission in a hexacene dimer: energetics dictate dynamics. Chem Sci 2019; 11:1079-1084. [PMID: 34084363 PMCID: PMC8146228 DOI: 10.1039/c9sc05066c] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Singlet fission (SF) is an exciton multiplication process with the potential to raise the efficiency limit of single junction solar cells from 33% to up to 45%. Most chromophores generally undergo SF as solid-state crystals. However, when such molecules are covalently coupled, the dimers can be used as model systems to study fundamental photophysical dynamics where a singlet exciton splits into two triplet excitons within individual molecules. Here we report the synthesis and photophysical characterization of singlet fission of a hexacene dimer. Comparing the hexacene dimer to analogous tetracene and pentacene dimers reveals that excess exoergicity slows down singlet fission, similar to what is observed in molecular crystals. Conversely, the lower triplet energy of hexacene results in an increase in the rate of triplet pair recombination, following the energy gap law for radiationless transitions. These results point to design rules for singlet fission chromophores: the energy gap between singlet and triplet pair should be minimal, and the gap between triplet pair and ground state should be large. We report the synthesis and photophysical characterization of highly exoergic singlet fission in a hexacene dimer revealing exciton dynamics that follow the energy gap law.![]()
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Affiliation(s)
- Samuel N Sanders
- Department of Chemistry, Columbia University New York NY 10027 USA
| | | | - Kealan J Fallon
- Department of Chemistry, Columbia University New York NY 10027 USA
| | - Matthew Y Sfeir
- Photonics Initiative, Advanced Science Research Center, City University of New York New York NY 10031 USA .,Department of Physics, Graduate Center, City University of New York New York NY 10016 USA
| | - Luis M Campos
- Department of Chemistry, Columbia University New York NY 10027 USA
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24
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Grieco C, Doucette GS, Munson KT, Swartzfager JR, Munro JM, Anthony JE, Dabo I, Asbury JB. Vibrational probe of the origin of singlet exciton fission in TIPS-pentacene solutions. J Chem Phys 2019; 151:154701. [DOI: 10.1063/1.5116586] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Christopher Grieco
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Grayson S. Doucette
- Intercollege Materials Science and Engineering Program, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Kyle T. Munson
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - John R. Swartzfager
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Jason M. Munro
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - John E. Anthony
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - Ismaila Dabo
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - John B. Asbury
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Intercollege Materials Science and Engineering Program, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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25
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Wang L, Wu Y, Liu Y, Wang L, Yao J, Fu H. Morphology independent triplet formation in pentalene films: Singlet fission as the triplet formation mechanism. J Chem Phys 2019; 151:124701. [PMID: 31575178 DOI: 10.1063/1.5097192] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Singlet fission (SF), a spin-allowed multiexciton generation process, experienced renewed interest in the last decade due to its potential to increase the efficiency of photovoltaic devices. The hurdles now lie in the limited range of SF-capable materials and demanding morphology requirement for an efficient fission process. Although primary fission to yield triplet pair (1TT) can occur independently of film morphology in intramolecular singlet fission (iSF) materials, the separation of the 1TT state has been shown to be highly dependent on the packing motif and morphologies. In this work, we have demonstrated that both iSF and triplet pair separation processes took place irrelevant of molecular order and/or film morphology in a series of pentalene compounds. With the >180% fission efficiency, the suitable triplet energy levels, and the long lifetime of the triplet excitons, these iSF systems can be integrated into practical photovoltaic application.
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Affiliation(s)
- Long Wang
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yishi Wu
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Yanping Liu
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species and Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lanfen Wang
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species and Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jiannian Yao
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China
| | - Hongbing Fu
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University, Beijing 100048, China
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26
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Pal AK, Bhattacharyya K, Datta A. Remote Functionalization through Symmetric or Asymmetric Substitutions Control the Pathway of Intermolecular Singlet Fission. J Chem Theory Comput 2019; 15:5014-5023. [DOI: 10.1021/acs.jctc.9b00419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Arun K. Pal
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, WB India
| | - Kalishankar Bhattacharyya
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, WB India
| | - Ayan Datta
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, WB India
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27
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Pun AB, Asadpoordarvish A, Kumarasamy E, Tayebjee MJY, Niesner D, McCamey DR, Sanders SN, Campos LM, Sfeir MY. Ultra-fast intramolecular singlet fission to persistent multiexcitons by molecular design. Nat Chem 2019; 11:821-828. [PMID: 31406323 DOI: 10.1038/s41557-019-0297-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 06/14/2019] [Indexed: 11/10/2022]
Abstract
Singlet fission-that is, the generation of two triplets from a lone singlet state-has recently resurfaced as a promising process for the generation of multiexcitons in organic systems. Although advances in this area have led to the discovery of modular classes of chromophores, controlling the fate of the multiexciton states has been a major challenge; for example, promoting fast multiexciton generation while maintaining long triplet lifetimes. Unravelling the dynamical evolution of the spin- and energy conversion processes from the transition of singlet excitons to correlated triplet pairs and individual triplet excitons is necessary to design materials that are optimized for translational technologies. Here, we engineer molecules featuring a discrete energy gradient that promotes the migration of strongly coupled triplet pairs to a spatially separated, weakly coupled state that readily dissociates into free triplets. This 'energy cleft' concept allows us to combine the amplification and migration processes within a single molecule, with rapid dissociation of tightly bound triplet pairs into individual triplets that exhibit lifetimes of ~20 µs.
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Affiliation(s)
- Andrew B Pun
- Department of Chemistry, Columbia University, NewYork, NY, USA
| | - Amir Asadpoordarvish
- ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales, Australia
| | | | - Murad J Y Tayebjee
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.,School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales, Australia
| | - Daniel Niesner
- Department of Chemistry, Columbia University, NewYork, NY, USA.,Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, MA, USA
| | - Dane R McCamey
- ARC Centre of Excellence in Exciton Science, School of Physics, University of New South Wales, Sydney, New South Wales, Australia
| | - Samuel N Sanders
- Department of Chemistry, Columbia University, NewYork, NY, USA. .,Rowland Institute at Harvard, Cambridge, MA, USA.
| | - Luis M Campos
- Department of Chemistry, Columbia University, NewYork, NY, USA.
| | - Matthew Y Sfeir
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, MA, USA. .,Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, USA. .,Department of Physics, Graduate Center, City University of New York, New York, NY, USA.
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28
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Li Q, Kan Y, Wu X, Su Z, Xu H. Searching for Diradicaloid Chromophores with Efficient Singlet Fission: Cyano‐Group Substitution of Difuropyrene Systems. CHEMPHOTOCHEM 2019. [DOI: 10.1002/cptc.201900046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Qing Li
- Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials School of Chemistry and Chemical EngineeringHuaiyin Normal University Huai'an 223300 China
- Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal University Changchun 130024 China
- Department of Chemistry, Faculty of ScienceYanbian University Yanji 133002 China
| | - Yu‐He Kan
- Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials School of Chemistry and Chemical EngineeringHuaiyin Normal University Huai'an 223300 China
- Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal University Changchun 130024 China
| | - Xue Wu
- Department of Chemistry, Faculty of ScienceYanbian University Yanji 133002 China
| | - Zhong‐Min Su
- Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal University Changchun 130024 China
- Department of Chemistry and Chemical EngineeringChangchun University of Science and Technology Changchun 130024 China
- Department of Chemistry, Faculty of ScienceYanbian University Yanji 133002 China
| | - Hong‐Liang Xu
- Institute of Functional Material Chemistry Faculty of ChemistryNortheast Normal University Changchun 130024 China
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29
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Efficient triplet pair separation from intramolecular singlet fission in dibenzopentalene derivatives. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9482-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Hu BL, An C, Wagner M, Ivanova G, Ivanova A, Baumgarten M. Three-Dimensional Pyrene-Fused N-Heteroacenes. J Am Chem Soc 2019; 141:5130-5134. [PMID: 30860825 PMCID: PMC6727623 DOI: 10.1021/jacs.9b01082] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Indexed: 01/30/2023]
Abstract
Four three-dimensional (3D) pyrene-fused N-heteroacenes (P1-P4) are designed and synthesized. From P1 to P4, their lengths are extended in an iterative way, where the thiadiazole unit can be reduced to diamine and the obtained diamines can be further condensed with the diketones with a thiadiazole unit. Compared to their two-dimensional counterparts, the solubility of these 3D pyrene-fused N-heteroacenes is improved by this 3D covalent linkage with two-dimensional units. The diameters of P1-P4 are 3.66, 6.06, 8.48 and 10.88 nm, respectively, and these 3D molecules are characterized by 1H, 13C and 2D NMR, MS, UV-vis, PL and CV spectra. Our strategy shows a promising way to large 3D pyrene-fused N-heteroacenes.
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Affiliation(s)
- Ben-Lin Hu
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Cunbin An
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Manfred Wagner
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Georgia Ivanova
- Department
of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Anela Ivanova
- Department
of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria
| | - Martin Baumgarten
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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31
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Abstract
The highly unusual state, 1(TT), is a coupled, double triplet state that has recently garnered significant attention. This multiexcitonic state can be formed by a quantum transition from a single-photon bright state in a variety of organic semiconducting materials. 1(TT)'s transient nature and similarity to independent triplets, however, has led to significant difficulties in characterization and prediction of its properties. Recent progress describing 1(TT) from theory and experiment are breaking through these difficulties, and have greatly advanced our comprehension of this state. Starting from the early description of 1(TT) in polyenes, this perspective discusses formation mechanisms, spectroscopic signatures, and the scope of intertriplet interactions. When employing singlet fission to generate charge carriers in a solar cell, 1(TT) has a central role. Due to the variety of coupling strengths between triplet states in 1(TT) amongst different chromophores, two different strategies are discussed to enable efficient charge carrier extraction. Continued growth in our understanding of 1(TT) may lead to control over complex quantum states for intriguing applications beyond high-efficiency, organic solar cells.
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Affiliation(s)
- Hyungjun Kim
- Department of Chemistry, Incheon National University, Incheon 22012, Republic of Korea.
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32
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Xu J, Tong X, Yu P, Wenya GE, McGrath T, Fong MJ, Wu J, Wang ZM. Ultrafast Dynamics of Charge Transfer and Photochemical Reactions in Solar Energy Conversion. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800221. [PMID: 30581691 PMCID: PMC6299728 DOI: 10.1002/advs.201800221] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 08/05/2018] [Indexed: 05/31/2023]
Abstract
For decades, ultrafast time-resolved spectroscopy has found its way into an increasing number of applications. It has become a vital technique to investigate energy conversion processes and charge transfer dynamics in optoelectronic systems such as solar cells and solar-driven photocatalytic applications. The understanding of charge transfer and photochemical reactions can help optimize and improve the performance of relevant devices with solar energy conversion processes. Here, the fundamental principles of photochemical and photophysical processes in photoinduced reactions, in which the fundamental charge carrier dynamic processes include interfacial electron transfer, singlet excitons, triplet excitons, excitons fission, and recombination, are reviewed. Transient absorption (TA) spectroscopy techniques provide a good understanding of the energy/electron transfer processes. These processes, including excited state generation and interfacial energy/electron transfer, are dominate constituents of solar energy conversion applications, for example, dye-sensitized solar cells and photocatalysis. An outlook for intrinsic electron/energy transfer dynamics via TA spectroscopic characterization is provided, establishing a foundation for the rational design of solar energy conversion devices.
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Affiliation(s)
- Jing‐Yin Xu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Xin Tong
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Peng Yu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Gideon Evans Wenya
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
| | - Thomas McGrath
- Department of PhysicsLancaster UniversityLancasterLancashireLA14YWUK
| | | | - Jiang Wu
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
- Department of Electronic and Electrical EngineeringUniversity College LondonTorrington PlaceLondonWC1E7JEUK
| | - Zhiming M. Wang
- Institute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu610054P. R. China
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33
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Wang Y, Ke Y, Zhao Y. The hierarchical and perturbative forms of stochastic Schrödinger equations and their applications to carrier dynamics in organic materials. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2018. [DOI: 10.1002/wcms.1375] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Yu‐Chen Wang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, and College of Chemistry and Chemical Engineering, Xiamen University Xiamen China
| | - Yaling Ke
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, and College of Chemistry and Chemical Engineering, Xiamen University Xiamen China
| | - Yi Zhao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, and College of Chemistry and Chemical Engineering, Xiamen University Xiamen China
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34
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Ito S, Nagami T, Nakano M. Molecular design for efficient singlet fission. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2018. [DOI: 10.1016/j.jphotochemrev.2018.01.002] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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35
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Dean JC, Zhang R, Hallani RK, Pensack RD, Sanders SN, Oblinsky DG, Parkin SR, Campos LM, Anthony JE, Scholes GD. Photophysical characterization and time-resolved spectroscopy of a anthradithiophene dimer: exploring the role of conformation in singlet fission. Phys Chem Chem Phys 2018; 19:23162-23175. [PMID: 28820218 DOI: 10.1039/c7cp03774k] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Quantitative singlet fission has been observed for a variety of acene derivatives such as tetracene and pentacene, and efforts to extend the library of singlet fission compounds is of current interest. Preliminary calculations suggest anthradithiophenes exhibit significant exothermicity between the first optically-allowed singlet state, S1, and 2 × T1 with an energy difference of >5000 cm-1. Given the fulfillment of this ingredient for singlet fission, here we investigate the singlet fission capability of a difluorinated anthradithiophene dimer (2ADT) covalently linked by a (dimethylsilyl)ethane bridge and derivatized by triisobutylsilylethynyl (TIBS) groups. Photophysical characterization of 2ADT and the single functionalized ADT monomer were carried out in toluene and acetone solution via absorption and fluorescence spectroscopy, and their photo-initiated dynamics were investigated with time-resolved fluorescence (TRF) and transient absorption (TA) spectroscopy. In accordance with computational predictions, two conformers of 2ADT were observed via fluorescence spectroscopy and were assigned to structures with the ADT cores trans or cis to one another about the covalent bridge. The two conformers exhibited markedly different excited state deactivation mechanisms, with the minor trans population being representative of the ADT monomer showing primarily radiative decay, while the dominant cis population underwent relaxation into an excimer geometry before internally converting to the ground state. The excimer formation kinetics were found to be solvent dependent, yielding time constants of ∼1.75 ns in toluene, and ∼600 ps in acetone. While the difference in rates elicits a role for the solvent in stabilizing the excimer structure, the rate is still decidedly long compared to most singlet fission rates of analogous dimers, suggesting that the excimer is neither a kinetic nor a thermodynamic trap, yet singlet fission was still not observed. The result highlights the sensitivity of the electronic coupling element between the singlet and correlated triplet pair states, to the dimer conformation in dictating singlet fission efficiency even when the energetic requirements are met.
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Affiliation(s)
- Jacob C Dean
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | - Ruomeng Zhang
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | - Rawad K Hallani
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Ryan D Pensack
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | - Samuel N Sanders
- Department of Chemistry, Columbia University, New York, NY 10027, USA
| | - Daniel G Oblinsky
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
| | - Sean R Parkin
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Luis M Campos
- Department of Chemistry, Columbia University, New York, NY 10027, USA
| | - John E Anthony
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA
| | - Gregory D Scholes
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
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36
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Tan K, Zeng Y, Su L, Wang S, Guo X, Li Q, Xie L, Qian Y, Yi Y, Huang W, Yang G. Molecular Dual-Rotators with Large Consecutive Emission Chromism for Visualized and High-Pressure Sensing. ACS OMEGA 2018; 3:717-723. [PMID: 31457927 PMCID: PMC6641431 DOI: 10.1021/acsomega.7b01746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/05/2018] [Indexed: 06/10/2023]
Abstract
Low-cost, stable, highly sensitive, and easy-to-equip fluorescent high-pressure sensors are always attractive in both industrial and scientific communities. Organic emitting materials with pressure-dependent bathochromisms usually exhibit prominent mechanoluminescence, due to disturbance of intermolecular packing. This hinders their applications in stable and robust pressure sensing. In this work, we have developed a mechanically stable organic molecular pressure sensor, caused by intramolecular consecutive rotations by pressure, which exhibit large and eye-detectable emission bathochromism from yellow-green to red fluorescence and can be used for 0-15 GPa pressure sensing. The emission bathochromism shows good linear relationship with pressure, exhibiting a high linear coefficient of 9.1 nm/GPa. Moreover, this molecular sensor exhibits high thermal and mechanical stabilities, indicating good potentials for robust and outdoor applications.
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Affiliation(s)
- Kangming Tan
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Key
Laboratory for Organic Electronics and Information Displays &
Institute of Advanced Materials (IAM), Jiangsu National Synergetic
Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Yan Zeng
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- School
of Science, Chongqing University of Posts
and Telecommunications, Chongqing 400065, China
| | - Lei Su
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Shuangqing Wang
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Xudong Guo
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Qingxu Li
- School
of Science, Chongqing University of Posts
and Telecommunications, Chongqing 400065, China
| | - Linghai Xie
- Key
Laboratory for Organic Electronics and Information Displays &
Institute of Advanced Materials (IAM), Jiangsu National Synergetic
Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Yan Qian
- Key
Laboratory for Organic Electronics and Information Displays &
Institute of Advanced Materials (IAM), Jiangsu National Synergetic
Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Yuanping Yi
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Wei Huang
- Key
Laboratory for Organic Electronics and Information Displays &
Institute of Advanced Materials (IAM), Jiangsu National Synergetic
Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
| | - Guoqiang Yang
- Key
Laboratory of Photochemistry and Key Laboratory of Organic Solids,
Institute of Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
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37
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Li G, Zhao J, Yang S, Li Y, Rakesh G, Zhang Q. Photooxidation of a Twisted Isoquinolinone. Chem Asian J 2018; 13:250-254. [DOI: 10.1002/asia.201701674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/21/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Gang Li
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education, Institute of Materials and Clean Energy; Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals; Shandong Normal University; Jinan 250014 P. R. China
- School of Materials Science and Engineering; Nanyang Technological University; Singapore 639798 Singapore
| | - Jianfeng Zhao
- School of Materials Science and Engineering; Nanyang Technological University; Singapore 639798 Singapore
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University (NanjingTech); 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Shufan Yang
- College of Chemistry, Chemical Engineering and Materials Science; Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong; Key Laboratory of Molecular and Nano Probes; Ministry of Education, Institute of Materials and Clean Energy; Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals; Shandong Normal University; Jinan 250014 P. R. China
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 639798 Singapore
| | - Ganguly Rakesh
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 639798 Singapore
| | - Qichun Zhang
- School of Materials Science and Engineering; Nanyang Technological University; Singapore 639798 Singapore
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 639798 Singapore
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38
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Wang X, Wang R, Shen L, Tang Z, Wen C, Dong B, Liu H, Zhang C, Li X. Intramolecular singlet fission in a face-to-face stacked tetracene trimer. Phys Chem Chem Phys 2018; 20:6330-6336. [DOI: 10.1039/c7cp07841b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient intramolecular singlet fission can be achieved in a “face-to-face” stacked tetracene trimer.
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Affiliation(s)
- Xuemin Wang
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Rui Wang
- National Laboratory of Solid State Microstructures & School of Physics
- Nanjing University
- Nanjing 210093
- China
| | - Li Shen
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Zhaofeng Tang
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Congying Wen
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Bin Dong
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Heyuan Liu
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Chunfeng Zhang
- National Laboratory of Solid State Microstructures & School of Physics
- Nanjing University
- Nanjing 210093
- China
| | - Xiyou Li
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
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39
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Shen L, Wang X, Liu H, Li X. Tuning the singlet fission relevant energetic levels of quinoidal bithiophene compounds by means of backbone modifications and functional group introduction. Phys Chem Chem Phys 2018; 20:5795-5802. [DOI: 10.1039/c7cp08313k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quinoidal bithiophene-based singlet fission candidates were designed and theoretically evaluated for the purpose of their application in solar cells.
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Affiliation(s)
- Li Shen
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Xuemin Wang
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Heyuan Liu
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
| | - Xiyou Li
- College of Science
- China University of Petroleum (East China)
- Qingdao
- China
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40
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Lukman S, Richter JM, Yang L, Hu P, Wu J, Greenham NC, Musser AJ. Efficient Singlet Fission and Triplet-Pair Emission in a Family of Zethrene Diradicaloids. J Am Chem Soc 2017; 139:18376-18385. [DOI: 10.1021/jacs.7b10762] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Steven Lukman
- Cavendish
Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionoplis Way, Singapore 138634, Singapore
| | - Johannes M. Richter
- Cavendish
Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Le Yang
- Cavendish
Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionoplis Way, Singapore 138634, Singapore
| | - Pan Hu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Jishan Wu
- Institute of Materials Research and Engineering, Agency for Science Technology and Research (A*STAR), 2 Fusionoplis Way, Singapore 138634, Singapore
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Neil C. Greenham
- Cavendish
Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - Andrew J. Musser
- Department of Physics & Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
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41
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Wang L, Wu Y, Chen J, Wang L, Liu Y, Yu Z, Yao J, Fu H. Absence of Intramolecular Singlet Fission in Pentacene-Perylenediimide Heterodimers: The Role of Charge Transfer State. J Phys Chem Lett 2017; 8:5609-5615. [PMID: 29087714 DOI: 10.1021/acs.jpclett.7b02597] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new class of donor-acceptor heterodimers based on two singlet fission (SF)-active chromophores, i.e., pentacene (Pc) and perylenediimide (PDI), was developed to investigate the role of charge transfer (CT) state on the excitonic dynamics. The CT state is efficiently generated upon photoexcitation. However, the resulting CT state decays to different energy states depending on the energy levels of the CT state. It undergoes extremely rapid deactivation to the ground state in polar CH2Cl2, whereas it undergoes transformation to a Pc triplet in nonpolar toluene. The efficient triplet generation in toluene is not due to SF but CT-mediated intersystem crossing. In light of the energy landscape, it is suggested that the deep energy level of the CT state relative to that of the triplet pair state makes the CT state actually serve as a trap state that cannot undergoes an intramolecular singlet fission process. These results provide guidance for the design of SF materials and highlight the requisite for more widely applicable design principles.
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Affiliation(s)
- Long Wang
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yishi Wu
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jianwei Chen
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Lanfen Wang
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Yanping Liu
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
| | - Zhenyi Yu
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Department of Chemistry, Tianjin University , Tianjin 300072, China
| | - Jiannian Yao
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University , Beijing 100048, China
| | - Hongbing Fu
- Beijing National Laboratory for Molecules Science (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species & Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
- Department of Chemistry, University of Chinese Academy of Sciences , Beijing 100049, China
- Beijing Key Laboratory for Optical Materials and Photonic Devices, Department of Chemistry, Capital Normal University , Beijing 100048, China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Department of Chemistry, Tianjin University , Tianjin 300072, China
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42
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Zang H, Zhao Y, Liang W. Quantum Interference in Singlet Fission: J- and H-Aggregate Behavior. J Phys Chem Lett 2017; 8:5105-5112. [PMID: 28960999 DOI: 10.1021/acs.jpclett.7b01996] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The quantum interference in singlet fission (SF) among the multiple pathways from singlet excited states to correlated triplet pair states is comprehensively investigated. The analytical analysis reveals that this interference is strongly affected by the exciton-exciton coupling and is closely related to the property of J- and H-type of aggregates. Different from the interference in the spectra of aggregates, which depends only on the sign of exciton-exciton coupling, the interference in SF is additionally related to the signs of couplings between singlet excited states and triplet pair states. The interference dynamics is further demonstrated numerically by a time-dependent wavepacket diffusion method with electron-phonon interactions incorporated. Finally, we take a pentacene dimer as a concrete example to show how to adjust the constructive and destructive interferences in SF dynamics in terms of J-/H-aggregate behaviors. The results presented here may provide guiding principles for designing efficient SF materials through directly tuning quantum interference via morphology engineering.
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Affiliation(s)
- Hang Zang
- Department of Chemical Physics, University of Science and Technology of China , Hefei, Anhui 230026, China
| | - Yi Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, China
| | - WanZhen Liang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, China
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43
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Rudnick A, Wetzel C, Tscheuschner S, Schmalz H, Vogt A, Greiner A, Bässler H, Mena-Osteritz E, Bäuerle P, Köhler A. Spectroscopic Study of Thiophene-Pyrrole-Containing S,N-Heteroheptacenes Compared to Acenes and Phenacenes. J Phys Chem B 2017; 121:7492-7501. [PMID: 28712293 DOI: 10.1021/acs.jpcb.7b02935] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we report a detailed spectroscopic study concerning the energy levels and vibrational structure of thiophene-pyrrole-containing S,N-heteroacenes. The aim of the study is first, to understand the differences in the photoluminescence (PL) efficiencies in this structurally similar series and second, to compare the electronic structure of S,N-heteroacenes to that of linear acenes and phenacenes, with a view to derive guidelines for the design of singlet fission materials. For S,N-heteroacenes comprising seven fused heterocyclic rings, we observe a higher PL quantum yield for derivatives with terminal thienothiophene units than for thienopyrrole-capped ones. This is assigned to a stronger tendency of the thienopyrrole-capped derivatives to form nonemissive associates in dilute solution, producing emissive excimers at higher concentration. By conducting time-resolved PL studies at 77 K, we further determine the lowest singlet and triplet energies for the S,N-heteroacenes with three, five, and seven fused rings. We show that their energies evolve with oligomer length analogously to those of phenacenes, yet in a fundamentally different way from that of linear acenes. This difference in evolution is attributed to the increasingly biradical character in acenes with increasing chain length in contrast to the S,N-heteroacenes and phenacenes.
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Affiliation(s)
| | - Christoph Wetzel
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | | | | | - Astrid Vogt
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | | | | | - Elena Mena-Osteritz
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Peter Bäuerle
- Institute of Organic Chemistry II and Advanced Materials, University of Ulm , Albert-Einstein-Allee 11, 89081 Ulm, Germany
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44
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Wu Y, Wang Y, Chen J, Zhang G, Yao J, Zhang D, Fu H. Intramolecular Singlet Fission in an Antiaromatic Polycyclic Hydrocarbon. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201704668] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yishi Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Yuancheng Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Jianwei Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Jiannian Yao
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Beijing Key Laboratory for Optical Materials and Photonic Devices; Department of Chemistry; Capital Normal University; Beijing 100048 P.R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Department of Chemistry; Tianjin University; Tianjin 300072 P.R. China
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Hongbing Fu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Beijing Key Laboratory for Optical Materials and Photonic Devices; Department of Chemistry; Capital Normal University; Beijing 100048 P.R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Department of Chemistry; Tianjin University; Tianjin 300072 P.R. China
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45
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Wu Y, Wang Y, Chen J, Zhang G, Yao J, Zhang D, Fu H. Intramolecular Singlet Fission in an Antiaromatic Polycyclic Hydrocarbon. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704668] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yishi Wu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Yuancheng Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Jianwei Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P.R. China
| | - Guanxin Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Jiannian Yao
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Beijing Key Laboratory for Optical Materials and Photonic Devices; Department of Chemistry; Capital Normal University; Beijing 100048 P.R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Department of Chemistry; Tianjin University; Tianjin 300072 P.R. China
| | - Deqing Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
| | - Hongbing Fu
- Beijing National Laboratory for Molecular Sciences (BNLMS); Institution Institute of chemistry; Beijing 100190 P.R. China
- Beijing Key Laboratory for Optical Materials and Photonic Devices; Department of Chemistry; Capital Normal University; Beijing 100048 P.R. China
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Department of Chemistry; Tianjin University; Tianjin 300072 P.R. China
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46
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Wang Z, Zhao J, Barbon A, Toffoletti A, Liu Y, An Y, Xu L, Karatay A, Yaglioglu HG, Yildiz EA, Hayvali M. Radical-Enhanced Intersystem Crossing in New Bodipy Derivatives and Application for Efficient Triplet–Triplet Annihilation Upconversion. J Am Chem Soc 2017; 139:7831-7842. [PMID: 28524657 DOI: 10.1021/jacs.7b02063] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhijia Wang
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, E-208 West
Campus, 2 Ling-Gong Road, Dalian 116024, People’s Republic of China
| | - Jianzhang Zhao
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, E-208 West
Campus, 2 Ling-Gong Road, Dalian 116024, People’s Republic of China
| | - Antonio Barbon
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo, 1, 35131 Padova, Italy
| | - Antonio Toffoletti
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo, 1, 35131 Padova, Italy
| | - Yan Liu
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, E-208 West
Campus, 2 Ling-Gong Road, Dalian 116024, People’s Republic of China
| | - Yonglin An
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, E-208 West
Campus, 2 Ling-Gong Road, Dalian 116024, People’s Republic of China
| | - Liang Xu
- State Key Laboratory
of Fine Chemicals, Dalian University of Technology, E-208 West
Campus, 2 Ling-Gong Road, Dalian 116024, People’s Republic of China
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Castellanos MA, Huo P. Enhancing Singlet Fission Dynamics by Suppressing Destructive Interference between Charge-Transfer Pathways. J Phys Chem Lett 2017; 8:2480-2488. [PMID: 28520444 DOI: 10.1021/acs.jpclett.7b00972] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We apply a real-time path-integral approach to investigate the charge-transfer (CT)-mediated singlet fission quantum dynamics in a model pentacene dimer. Our path-integral method gives reliable fission dynamics across various reaction regimes as well as a broad range of reorganization energies and temperatures. With this method, we investigated the destructive interference between the two CT-mediated fission pathways and discovered two mechanisms that can suppress this deleterious effect. First, increasing the energy gap between the two CT states effectively shuts down the high-lying CT pathway, leaving a better functioning low-lying CT pathway with a minimum amount of destructive interference. Second, intermolecular vibrations induce electronic coupling fluctuations, such that the destructive cancellations due to the different signs in static electronic couplings are suppressed. Our numerical results suggest that these two effects can enhance the fission rate up to three times. These findings reveal promising design principles for more efficient singlet fission materials.
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Affiliation(s)
- Maria A Castellanos
- Department of Chemistry, University of Rochester , 120 Trustee Road, Rochester, New York 14627, United States
- Department of Chemistry, Universidad Icesi , Cali, Colombia
| | - Pengfei Huo
- Department of Chemistry, University of Rochester , 120 Trustee Road, Rochester, New York 14627, United States
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48
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Mukhopadhyay T, Musser AJ, Puttaraju B, Dhar J, Friend RH, Patil S. Is the Chemical Strategy for Imbuing "Polyene" Character in Diketopyrrolopyrrole-Based Chromophores Sufficient for Singlet Fission? J Phys Chem Lett 2017; 8:984-991. [PMID: 28112521 DOI: 10.1021/acs.jpclett.6b02919] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we have rationally designed and synthesized a novel thiophene-diketopyrrolopyrrole (TDPP)-vinyl-based dimer. We have investigated the optical and electronic properties and have probed the photophysical dynamics using transient absorption to investigate the possibility of singlet exciton fission. These revealed extremely rapid decay to the ground state (<50 ps), which we confirm is due to intramolecular excitonic processes rather than large-scale conformational change enabled by the vinyl linker. In all cases, the main excited state appears to be "dark", suggesting rapid internal conversion into a dark 2Ag-type singlet state. We found no evidence of triplet formation in TDPP-V-TDPP under direct photoexcitation. This may be a consequence of significant singlet stabilization in the dimer, bringing it below the energy needed to form two triplets. Our studies on this model compound set valuable lessons for design of novel triplet-forming materials and highlight the need for more broadly applicable design principles.
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Affiliation(s)
- Tushita Mukhopadhyay
- Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore 560012, India
| | - Andrew J Musser
- Department of Physics and Astronomy, University of Sheffield , Sheffield, United Kingdom
- Cavendish Laboratory, Department of Physics, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Boregowda Puttaraju
- Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore 560012, India
| | - Joydeep Dhar
- Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore 560012, India
| | - Richard H Friend
- Cavendish Laboratory, Department of Physics, University of Cambridge , Cambridge CB3 0HE, United Kingdom
| | - Satish Patil
- Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore 560012, India
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50
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Li X, Tang ML. Triplet transport in thin films: fundamentals and applications. Chem Commun (Camb) 2017; 53:4429-4440. [DOI: 10.1039/c7cc00861a] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An overview of experimental and theoretical work on triplet energy transfer, with a focus on triplet transport in thin films.
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Affiliation(s)
- Xin Li
- Chemistry Department
- University of California
- Riverside
- USA
| | - Ming Lee Tang
- Chemistry Department
- University of California
- Riverside
- USA
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