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Thomas A, Ji C, Siddlingeshwar B, Manohar PU, Ying F, Wu W. Revealing the biradicaloid nature inherited in the derivatives of thieno[3,4- c][1,2,5]thiadiazole: a computational study. Phys Chem Chem Phys 2021; 23:1050-1061. [PMID: 33346279 DOI: 10.1039/d0cp05106c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Computational studies were performed on non-classical thieno[3,4-c][1,2,5] thiadiazole and its pi donor derivatives (TT dyes) so as to delineate the factors responsible for their near-infrared (NIR) absorption. For all dyes except the unsubstituted bare dye, adiabatic singlet-triplet energy gaps (estimated through the ΔSCF procedure using the B3LYP and M062X DFT methods and SFTDDFT with the 5050 functional) were less than 1eV. Percentage calculations of the biradicaloid character suggested a moderate biradicaloid nature in all derivatives. There was a resemblance between the frontier molecular orbital (MO) picture of the TT bicyclic ring and the degenerate non-bonding molecular orbitals of Trimethyleneethane (TME, a known biradical). Inter-fragment charge transfer analysis revealed not only a considerable donation of charge to the central ring (Acceptor, TT part) but also substantial charge redistribution within the ring itself. From these results, it was inferred that NIR absorption, in these dyes, was due to: (1) a reduced HOMO-LUMO gap (HLG) as a TME biradical substructure forms its chromophoric part; and (2) charge transfer from the donor substituents. The non-bonding nature of the S atom, in the bare dye, with its neighbouring N/C atom (of the highest occupied π-MOs), led to an examination of its electronic structure using the ab initio valence bond method. The relatively large weight and energetic stability of the biradicaloid VB structures compared to those of the ylidic structures clearly disclosed the importance of biradicaloid structures in the overall resonance of the bare dye. Their utility as singlet fission materials was screened using singlet and triplet energy-based molecular structure activity criteria. The results were encouraging, demanding experiments to reaffirm the materials' usefulness.
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Affiliation(s)
- Anup Thomas
- Center for Computational Research in Clean Energy Technologies, Sree Chitra Thirunal College of Engineering, Pappanamcode, Trivandrum 695018, India
| | - Chenru Ji
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, The State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
| | - B Siddlingeshwar
- Department of Physics, M. S. Ramaiah Institute of Technology, Bengaluru 560054, India.
| | - Prashant Uday Manohar
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India
| | - Fuming Ying
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, The State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
| | - Wei Wu
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, The State Key Laboratory of Physical Chemistry of Solid Surfaces, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China.
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Abstract
Quinoidal π-Conjugated polymers with open shell character represent an intriguing class of macromolecules in terms of both fundamental research and practical applications.
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Affiliation(s)
- Xiaozhou Ji
- Department of Chemistry
- Texas A&M University
- College Station
- USA
| | - Lei Fang
- Department of Chemistry
- Texas A&M University
- College Station
- USA
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Photoinduced electron transfer in non-covalent free-base octaethylporphyrin and 2-nitrofluorene donor-acceptor system: A combined experimental and quantum chemical study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Raychev D, Guskova O. Charge carrier mobility in one-dimensional aligned π-stacks of conjugated small molecules with a benzothiadiazole central unit. Phys Chem Chem Phys 2017; 19:8330-8339. [PMID: 28280813 DOI: 10.1039/c7cp00798a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A theoretical study is applied to gain insight into the microscopic electron and hole transport in benzothiadiazole-cored molecular semiconductors either with furan or thiophene flanks arranged in π-stacks. For the characterization of the energetics of the reduction and oxidation processes and their impact on the molecular geometry, the internal reorganization energy is defined for isolated molecules in the gas phase. The outer-shell reorganization energy is evaluated within the frequency-resolved cavity model and as an electrostatic contribution within the polarizable continuum model. The intermolecular electronic coupling interaction for the Marcus charge hopping is calculated using the energy splitting in dimer method, the generalized Mulliken-Hush approach and the fragment charge difference scheme. In order to probe the relation between the charge hopping rate/charge carrier mobility and the molecular organization within the π-stacks, different stacking modes are investigated: (i) dimers with a perfect registry, i.e. segregated stacking motif, when molecules are placed face-to-face, and (ii) dimers forming slipped cofacial orientations with longitudinal and transverse shifts, i.e. mixed stacking motif. Besides, the effects of molecular planarity and rigidity, influencing internal molecular relaxation upon charging, the effects of non-covalent interactions within stacks and the heteroatom replacement on the charge carrier mobility are studied. The results obtained in the simulations of one-dimensional aligned π-stacks of molecular semiconductors are compared with available experimental data for small conjugated benzothiadiazole-cored molecules with thiophene flanks and benzothiadiazole-quaterthiophene-based copolymers.
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Affiliation(s)
- Deyan Raychev
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden (TUD), Dresden D-01062, Germany. and Institute Theory of Polymers, Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, Dresden D-01069, Germany
| | - Olga Guskova
- Dresden Center for Computational Materials Science (DCMS), Technische Universität Dresden (TUD), Dresden D-01062, Germany. and Institute Theory of Polymers, Leibniz Institute of Polymer Research Dresden, Hohe Str. 6, Dresden D-01069, Germany
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Thomas A, Chitumalla RK, Puyad AL, Mohan K, Jang J. Computational studies of hole/electron transport in positional isomers of linear oligo-thienoacenes: Evaluation of internal reorganization energies using density functional theory. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Shaik B, Han JH, Song DJ, Kang HM, Lee SG. Synthesis and characterization of acceptor–donor–acceptor-based low band gap small molecules containing benzoselenadiazole. CAN J CHEM 2016. [DOI: 10.1139/cjc-2015-0542] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Acceptor–donor–acceptor-type compounds 5′,5″-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3′-dodecyl-2,2′-bithiophene-5-carbonitrile) (9) and 4,4′-(5,5′-(benzo[c][1,2,5]selenadiazole-4,7-diyl)bis(3-dodecylthiophene-5,2-diyl))dibenzonitrile (10) were designed and synthesized. These compounds differ in terminal positions, compound 9 with a thiophene-containing nitrile group and compound 10 with a phenyl-containing nitrile group. Both compounds have shown good thermal stability and low band gap. The band gaps of compounds 9 and 10 were 1.74 and 1.83 eV, respectively. These results indicate that they are promising materials for use in optoelectronics.
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Affiliation(s)
- Baji Shaik
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
| | - Jin-Hee Han
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
| | - Dong Jin Song
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
| | - Hun-Min Kang
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
| | - Sang-Gyeong Lee
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
- Department of Chemistry, Research Institute of Natural Science (RINS), Graduate School for Molecular Materials and Nanochemistry, Gyeongsang National University, Jinju 660-701, Korea
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Yuen JD, Wang M, Fan J, Sheberla D, Kemei M, Banerji N, Scarongella M, Valouch S, Pho T, Kumar R, Chesnut EC, Bendikov M, Wudl F. Importance of unpaired electrons in organic electronics. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27321] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jonathan D. Yuen
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Mingfeng Wang
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Jian Fan
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Dennis Sheberla
- Department of Organic Chemistry; The Weizmann Institute of Science; Rehovot 76100 Israel
| | - Moureen Kemei
- Materials Department; University of California; Santa Barbara California 93106
| | - Natalie Banerji
- Institute of Chemical Sciences & Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL); SB ISIC GR-MO, Station 6 CH-1015 Lausanne Switzerland
| | - Mariateresa Scarongella
- Institute of Chemical Sciences & Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL); SB ISIC GR-MO, Station 6 CH-1015 Lausanne Switzerland
| | - Sebastian Valouch
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Toan Pho
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Rajeev Kumar
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Eneida C. Chesnut
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
| | - Michael Bendikov
- Department of Organic Chemistry; The Weizmann Institute of Science; Rehovot 76100 Israel
| | - Fred Wudl
- Center for Polymers and Organic Solids, University of California; Santa Barbara California 93106
- Materials Department; University of California; Santa Barbara California 93106
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Affiliation(s)
- Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University (HIRODAI), 1-3-1 Kagamiyama, Higashi-Hiroshima,
Hiroshima 739-8526, Japan
- Institute for Molecular Science (IMS), Okazaki, Aichi 444-8787,
Japan
- JST-CREST, 5
Sanbancho,
Chiyodaku, Tokyo 102-0075, Japan
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Neto BAD, Corrêa JR, Silva RG. Selective mitochondrial staining with small fluorescent probes: importance, design, synthesis, challenges and trends for new markers. RSC Adv 2013. [DOI: 10.1039/c2ra21995f] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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