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Zeplichal M, Gies J, Bernd J, Winslaws DK, Chang T, Chen YS, Strauss SH, Boltalina OV, Terfort A. Fluorinated Azaacenes: Efficient Syntheses, Structures, and Electrochemical Properties. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.109960] [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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Solel E, Pappo D, Reany O, Mejuch T, Gershoni-Poranne R, Botoshansky M, Stanger A, Keinan E. Flat corannulene: when a transition state becomes a stable molecule. Chem Sci 2020; 11:13015-13025. [PMID: 34094486 PMCID: PMC8163244 DOI: 10.1039/d0sc04566g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/16/2020] [Indexed: 12/17/2022] Open
Abstract
Flat corannulene has been considered so far only as a transition state of the bowl-to-bowl inversion process. This study was driven by the prediction that substituents with strong steric repulsion could destabilize the bowl-shaped conformation of this molecule to such an extent that the highly unstable planar geometry would become an isolable molecule. To examine the substituents' effect on the corannulene bowl depth, optimized structures for the highly-congested decakis(t-butylsulfido)corannulene were calculated. The computations, performed with both the M06-2X/def2-TZVP and the B3LYP/def2-TZVP methods (the latter with and without Grimme's D3 dispersion correction), predict that this molecule can achieve two minimum structures: a flat carbon framework and a bowl-shaped structure, which are very close in energy. This rather unusual compound was easily synthesized from decachlorocorannulene under mild reaction conditions, and X-ray crystallographic studies gave similar results to the theoretical predictions. This compound crystallized in two different polymorphs, one exhibiting a completely flat corannulene core and the other having a bowl-shaped conformation.
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Affiliation(s)
- Ephrath Solel
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
| | - Doron Pappo
- Department of Chemistry, Ben-Gurion University of the Negev Beer-Sheva 84105 Israel
| | - Ofer Reany
- Avinoam Adam Department of Natural Sciences, The Open University of Israel 1 University Road, P.O. Box 808 Ra'anana 4353701 Israel
| | - Tom Mejuch
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
| | - Renana Gershoni-Poranne
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
| | - Mark Botoshansky
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
| | - Amnon Stanger
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
| | - Ehud Keinan
- The Schulich Faculty of Chemistry, Technion - Israel Institute of Technology Technion City Haifa 3200001 Israel
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Barát V, Budanovic M, Tam SM, Huh J, Webster RD, Stuparu MC. Corannulene-Based Electron Acceptors: Combining Modular and Practical Synthesis with Electron Affinity and Solubility. Chemistry 2020; 26:3231-3235. [PMID: 31975463 DOI: 10.1002/chem.201905521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/20/2020] [Indexed: 11/07/2022]
Abstract
It is shown in this work that high electron affinity can be combined with high solubility and practical accessibility in corannulene-based electron acceptors. The electron affinity originates from the presence of three different types of electron-withdrawing groups (imide, sulfone, and trifluoromethyl) on the aromatic scaffold. The imide substituent further hosts a long alkyl chain (C18 H37 ) to boast solubility in a wide range of organic solvents. The synthesis is modular and consists of three simple steps from a commonly available corannulene derivative with an overall isolated yield of 22-27 %.
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Affiliation(s)
- Viktor Barát
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore, 21-Nanyang Link, 637371, Singapore, Singapore
| | - Maja Budanovic
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore, 21-Nanyang Link, 637371, Singapore, Singapore
| | - Si Man Tam
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore, 21-Nanyang Link, 637371, Singapore, Singapore
| | - June Huh
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, South Korea
| | - Richard D Webster
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore, 21-Nanyang Link, 637371, Singapore, Singapore
| | - Mihaiela C Stuparu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University Singapore, 21-Nanyang Link, 637371, Singapore, Singapore.,School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore, Singapore
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Rogachev AY, Alkan M, Li J, Liu S, Spisak SN, Filatov AS, Petrukhina MA. Mono-reduced Corannulene: To Couple and Not to Couple in One Crystal. Chemistry 2019; 25:14140-14147. [PMID: 31390107 DOI: 10.1002/chem.201902992] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Indexed: 11/07/2022]
Abstract
One-electron reduction of corannulene, C20 H10 , with Li metal in diglyme resulted in crystallization of [{Li+ (diglyme)2 }4 (C20 H10 .- )2 (C20 H10 -C20 H10 )2- ] (1), as revealed by single-crystal X-ray diffraction. This hybrid product contains two corannulene monoanion-radicals along with a dianionic dimer, crystallized with four Li+ ions wrapped by diglyme molecules. The dimeric (C20 H10 -C20 H10 )2- anion provides the first crystallographically confirmed example of spontaneous radical dimerization for C20 H10 .- . The C-C bond length between the two C20 H10 .- bowls of 1.588(5) Å is consistent with the single σ-bond character of the linker. The trans-disposition of two bowls in the centrosymmetric (C20 H10 -C20 H10 )2- dimer is observed with the torsion angle around the central C-C bond of 180°. Comprehensive theoretical analysis of formation/decomposition processes of the dimeric dianion has been carried out in order to evaluate the nature of bonding and energetics of the C20 H10 .- coupling. It is found that such σ-bonded dimers are thermodynamically unstable due to large preparation energy and repulsive Pauli component of the bonding, but kinetically persistent due to a high energy barrier provided by the existing spin-crossing point.
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Affiliation(s)
- Andrey Yu Rogachev
- Department of Chemistry, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - Melisa Alkan
- Department of Chemistry, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - Jingbai Li
- Department of Chemistry, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - Shuyang Liu
- Department of Chemistry, Illinois Institute of Technology, Chicago, IL 60616, USA
| | - Sarah N Spisak
- Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA
| | - Alexander S Filatov
- Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA
| | - Marina A Petrukhina
- Department of Chemistry, University at Albany, State University of New York, Albany, NY, 12222, USA
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Castro KP, Bukovsky EV, Kuvychko IV, DeWeerd NJ, Chen Y, Deng SHM, Wang X, Popov AA, Strauss SH, Boltalina OV. PAH/PAH(CF 3 ) n Donor/Acceptor Charge-Transfer Complexes in Solution and in Solid-State Co-Crystals. Chemistry 2019; 25:13547-13565. [PMID: 31381207 PMCID: PMC6916568 DOI: 10.1002/chem.201902712] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Indexed: 11/16/2022]
Abstract
A solution, solid-state, and computational study is reported of polycyclic aromatic hydrocarbon PAH/PAH(CF3 )n donor/acceptor (D/A) charge-transfer complexes that involve six PAH(CF3 )n acceptors with known gas-phase electron affinities that range from 2.11(2) to 2.805(15) eV and four PAH donors, including seven CT co-crystal X-ray structures that exhibit hexagonal arrays of mixed π-stacks with 1/1, 1/2, or 2/1 D/A stoichiometries (PAH=anthracene, azulene, coronene, perylene, pyrene, triphenylene; n=5, 6). These are the first D/A CT complexes with PAH(CF3 )n acceptors to be studied in detail. The nine D/A combinations were chosen to allow several structural and electronic comparisons to be made, providing new insights about controlling D/A interactions and the structures of CT co-crystals. The comparisons include, among others, CT complexes of the same PAH(CF3 )n acceptor with four PAH donors and CT complexes of the same donor with four PAH(CF3 )n acceptors. All nine CT complexes exhibit charge-transfer bands in solution with λmax between 467 and 600 nm. A plot of E(λmax ) versus [IE(donor)-EA(acceptor)] for the nine CT complexes studied is linear with a slope of 0.72±0.03 eV eV-1 . This plot is the first of its kind for CT complexes with structurally related donors and acceptors for which precise experimental gas-phase IEs and EAs are known. It demonstrates that conclusions based on the common assumption that the slope of a CT E(λmax ) versus [IE-EA] plot is unity may be incorrect in at least some cases and should be reconsidered.
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Affiliation(s)
- Karlee P. Castro
- Department of ChemistryColorado State UniversityFort CollinsCO80523USA
| | - Eric V. Bukovsky
- Department of ChemistryColorado State UniversityFort CollinsCO80523USA
| | - Igor V. Kuvychko
- Department of ChemistryColorado State UniversityFort CollinsCO80523USA
| | | | - Yu‐Sheng Chen
- ChemMatCARSUniversity of Chicago, Advanced Photon SourceArgonneIL 60439USA
| | - Shihu H. M. Deng
- Physical Sciences DivisionPacific Northwest National Laboratory, MS K8 88P.O. Box 999RichlandWashington99352USA
| | - Xue‐Bin Wang
- Physical Sciences DivisionPacific Northwest National Laboratory, MS K8 88P.O. Box 999RichlandWashington99352USA
| | - Alexey A. Popov
- Leibniz Institute for Solid State and Materials ResearchDresden01069Germany
| | - Steven H. Strauss
- Department of ChemistryColorado State UniversityFort CollinsCO80523USA
| | - Olga V. Boltalina
- Department of ChemistryColorado State UniversityFort CollinsCO80523USA
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DeWeerd NJ, Bukovsky EV, Castro KP, Kuvychko IV, Popov AA, Strauss SH, Boltalina OV. Steric and electronic effects of CF3 conformations in acene(CF3) derivatives. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.02.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Haupt A, Lentz D. Corannulenes with Electron-Withdrawing Substituents: Synthetic Approaches and Resulting Structural and Electronic Properties. Chemistry 2018; 25:3440-3454. [PMID: 30238526 DOI: 10.1002/chem.201803927] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Indexed: 11/10/2022]
Abstract
Corannulene is a multifaceted polyaromatic compound. It has many interesting properties; for example, it has a bowl-shaped molecular structure that, in addition, undergoes a dynamic inversion process. It has attracted much attention within the last decades. This is not only due to its structural properties but also its electronic properties and its various potential applications to materials chemistry. Here, synthetic approaches towards corannulene derivatives with electron-withdrawing substituents are summarized. This includes both selective and unselective methods. Further, the electrochemical properties, that is, the reduction potentials, are analyzed and compared. As a main conclusion, one can state that the electron affinity depends roughly linearly on the number of substituents. Finally, the structural behavior of the substituted buckybowls in the solid state is highlighted. This also allows a general statement about the influence of the electronic and steric nature of substituents on the molecular structures and the solid-state packing of the corannulene derivatives.
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Affiliation(s)
- Axel Haupt
- Freie Universität Berlin, Fachbereich Biologie, Chemie, Pharmazie, Institut für Chemie und Biochemie, Fabeckstrasse 34-36, D-14195, Berlin, Germany
| | - Dieter Lentz
- Freie Universität Berlin, Fachbereich Biologie, Chemie, Pharmazie, Institut für Chemie und Biochemie, Fabeckstrasse 34-36, D-14195, Berlin, Germany
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Rippy KC, DeWeerd NJ, Kuvychko IV, Chen YS, Strauss SH, Boltalina OV. Fluorination-Induced Evolution of Columnar Packing in Fluorous Triphenylenes and Benzotriphenylenes. Chempluschem 2018; 83:1067-1077. [PMID: 31950709 DOI: 10.1002/cplu.201800451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Indexed: 01/29/2023]
Abstract
Use of D3h -symmetrical triphenylene (TRPH) as a substrate for high-temperature radical reactions with C4 F8 I2 under varying conditions resulted in the introduction of four types of fluorinated substituents: ω-C4 F8 H, c-C4 F8 , c-C4 F4 , and c-C4 HF3 . In contrast to the previous work on direct (poly)substitutions with RF groups in polycyclic aromatic hydrocarbons (PAHs), in this work regiospecificity, selectivity, and high yield were achieved for TRPH(C4 F8 ) and TRPH(C4 F8 )3 . New single-crystal structural data for seven compounds combined with literature crystallographic data allowed for the first detailed and precise analysis of the effects of fluorous substituent types, their number, and their position(s) on the TRPH core on the solid-state packing, and more specifically, the degree of π-π overlap between neighboring molecules, which is linked to charge transport properties. Comparison of isostructural partially fluorinated benzotriphenylenes, 2,3-TRPH(C4 F4 ) and 2,3-TRPH(C4 HF3 ), revealed an unexpectedly large (30 %) drop of π-π overlap, when only one fluorine atom was replaced with the hydrogen atom in a C4 F4 moiety. Theoretical and potentially practical implications of this work may include further testing and elaboration of computational methods describing solid-state interactions and predictions of transport properties of organic semiconductors, and further advances in the molecular design of high-performing TRPH-based organic materials and supramolecular architectures for organic optoelectronics.
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Affiliation(s)
- Kerry C Rippy
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Nicholas J DeWeerd
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Igor V Kuvychko
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Yu-Sheng Chen
- ChemMatCARS, University of Chicago Advanced Photon Source, Argonne, IL 60439, USA
| | - Steven H Strauss
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Olga V Boltalina
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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