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Roy R, Brouillac C, Jacques E, Quinton C, Poriel C. π-Conjugated Nanohoops: A New Generation of Curved Materials for Organic Electronics. Angew Chem Int Ed Engl 2024:e202402608. [PMID: 38744668 DOI: 10.1002/anie.202402608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/16/2024]
Abstract
Nanohoops, cyclic association of π-conjugated systems to form a hoop-shaped molecule, have been widely developed in the last 15 years. Beyond the synthetic challenge, the strong interest towards these molecules arises from their radially oriented π-orbitals, which provide singular properties to these fascinating structures. Thanks to their particular cylindrical arrangement, this new generation of curved molecules have been already used in many applications such as host-guest complexation, biosensing, bioimaging, solid-state emission and catalysis. However, their potential in organic electronics has only started to be explored. From the first incorporation as an emitter in a fluorescent organic light emitting diode (OLED), to the recent first incorporation as a host in phosphorescent OLEDs or as charge transporter in organic field-effect transistors and in organic photovoltaics, this field has shown important breakthroughs in recent years. These findings have revealed that curved materials can play a key role in the future and can even be more efficient than their linear counterparts. This can have important repercussions for the future of electronics. Time has now come to overview the different nanohoops used to date in electronic devices in order to stimulate the future molecular designs of functional materials based on these macrocycles.
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Affiliation(s)
- Rupam Roy
- Univ Rennes, CNRS, ISCR-UMR CNRS 6226, F-35000, Rennes, France
- Department of Chemistry, University of Florida, Gainesville, Florida, United States, 32603
| | | | | | | | - Cyril Poriel
- Univ Rennes, CNRS, ISCR-UMR CNRS 6226, F-35000, Rennes, France
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Ehjeij D, Rominger F, Bunz UHF, Freudenberg J, Müllen K. Thermolysis of Biphenylene toward Cyclo-ortho-phenylenes. Angew Chem Int Ed Engl 2024; 63:e202312040. [PMID: 38084633 DOI: 10.1002/anie.202312040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Indexed: 01/13/2024]
Abstract
The solvent and catalyst free thermolysis of biphenylenes at 350 °C furnishes [n]cyclo-ortho-phenylenes ([n]COPs, n=4-10) in one step and in high yields. At 400 °C biphenylene dimerizes into tetraphenylene, but lower reaction temperatures produce cyclooligomers. If suitably substituted, the oligomers are soluble and can be isolated and characterized. The products are exclusively cyclic. In the crystalline state, [6]COP displays an alternating crown-shaped conformation.
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Affiliation(s)
- Daniel Ehjeij
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Jan Freudenberg
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Klaus Müllen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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Fan Y, He J, Guo S, Jiang H. Host-Guest Chemistry in Binary and Ternary Complexes Utilizing π-Conjugated Carbon Nanorings. Chempluschem 2023:e202300536. [PMID: 38123532 DOI: 10.1002/cplu.202300536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 12/23/2023]
Abstract
The carbon nanorings, possessing a radial π system, have garnered significant attention primarily due to their size-dependent photophysical properties and the presence of a unique curved π-conjugated cavity. This is evidenced by the rapid proliferation of publications. Furthermore, the integration of building blocks into CPP skeletons can confer [n]CPPs with novel and exceptional photophysical and electronic characteristics, as well as chiral properties and host-guest interactions, thereby augmenting the diversity of [n]CPPs. Notably, the curved π surface structures and concave cavity of carbon nanorings enable them to host aromatic or non-aromatic guests with a complementarily curved surface, resulting in interesting binary or ternary complexes. This review provides a comprehensive treatment of literature reports on binary and ternary complexes, focusing on both their host-guest interactions and properties. It is important to note that the scope of this review is limited to host-guest chemistry in binary and ternary complexes based on π-conjugated carbon nanorings.
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Affiliation(s)
- Yanqing Fan
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Jing He
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Shengzhu Guo
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
| | - Hua Jiang
- College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China
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Grabicki N, Fisher S, Dumele O. A Fourfold Gold(I)-Aryl Macrocycle with Hyperbolic Geometry and its Reductive Elimination to a Carbon Nanoring Host. Angew Chem Int Ed Engl 2023; 62:e202217917. [PMID: 36753601 DOI: 10.1002/anie.202217917] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/10/2023]
Abstract
An ethylene glycol-decorated [6]cyclo-meta-phenylene (CMP) macrocycle was synthesized and utilized as a subunit to construct a fourfold AuI 2 -aryl metallacycle with an overall square arrangement. The corners consist of rigid dinuclear gold(I) complexes previously known to form only triangular metallacycles. The interplay between the conformational flexibility of the [6]CMP macrocycle and the rigid dinuclear gold(I) moieties enable the square geometry, as revealed by single-crystal X-ray diffraction. The formation of the gold complex shows size-selectivity compared to an alternative route using platinum(II) corner motifs. Upon reductive elimination, an all-organic ether-decorated carbon nanoring was obtained. Investigation as a host for the complexation of large guest molecules with a suitable convex π-surfaces was accomplished using isothermal NMR binding titrations. Association constants for [6]cycloparaphenylene ([6]CPP), [7]CPP, C60 , and C70 were determined.
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Affiliation(s)
- Niklas Grabicki
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Sergey Fisher
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Oliver Dumele
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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Xu K, Zhang ZY, Zhou Z, Li C. Prospering the biphen[n]arenes family by tailoring reaction modules. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.09.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Volkmann J, Kohrs D, Bernt F, Wegner HA. Synthesis of a Substituted [10]Cycloparaphenylene through [2+2+2] Cycloaddition. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jannis Volkmann
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
- Center for Material Research (ZfM/LaMa) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
| | - Daniel Kohrs
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
- Center for Material Research (ZfM/LaMa) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
| | - Felix Bernt
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
- Center for Material Research (ZfM/LaMa) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
| | - Hermann A. Wegner
- Institute of Organic Chemistry Justus Liebig University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
- Center for Material Research (ZfM/LaMa) Justus Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
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Liu A, Meng X, Shen CC, Zhang ZY, Li C. Facile synthesis of heterogeneous macrocycles for intramolecular energy transfer. Chem Commun (Camb) 2022; 58:12684-12687. [DOI: 10.1039/d2cc04673c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterogeneous macrocycles with fluorenone and fluorenol functional groups are synthesized by two facile methods involving post-modification on the macrocycles and one-pot co-cyclization from different monomers.
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Affiliation(s)
- Ao Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Xin Meng
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Chen-Chen Shen
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Zhi-Yuan Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Chunju Li
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
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Dumele O, Grabicki N. Confining the Inner Space of Strained Carbon Nanorings. Synlett 2021. [DOI: 10.1055/s-0040-1719853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractStrained aromatic macrocycles based on cycloparaphenylenes (CPPs) are the shortest repeating units of armchair single-walled carbon nanotubes. Since the development of several new synthetic methodologies for accessing these structures, their properties have been extensively studied. Besides the fundamental interest in these novel molecular scaffolds, their application in the field of materials science is an ongoing topic of research. Most of the reported CPP-type macrocycles display strong binding toward fullerenes, due to the perfect match between the convex and concave π-surfaces of fullerenes and CPPs, respectively. Highly functionalized CPP derivatives capable of supramolecular binding with other molecules are rarely reported. The synthesis of highly functionalized [n]cyclo-2,7-pyrenylenes leads to CPP-type macrocycles with a defined cavity capable of binding non-fullerene guests with high association constants.
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Wössner JS, Wassy D, Weber A, Bovenkerk M, Hermann M, Schmidt M, Esser B. [ n]Cyclodibenzopentalenes as Antiaromatic Curved Nanocarbons with High Strain and Strong Fullerene Binding. J Am Chem Soc 2021; 143:12244-12252. [PMID: 34324813 DOI: 10.1021/jacs.1c05251] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Conjugated nanohoops provide a platform to study structure-property relationships; they are attractive hosts for supramolecular chemistry as well as promising candidates as new organic materials. We herein present [n]cyclodibenzopentalenes ([n]CDBPs) as antiaromatic analogues of [n]cycloparaphenylenes. Platinum-mediated macrocyclization of dibenzopentalene boronic esters provided the trimer and tetramer with strain energies of up to 80 kcal mol-1. In the solid state, the cylindrical [4]CDBP molecules align to form columnar structures. The larger hoop [4]CDBP binds both fullerenes C60 and C70 with temperature-dependent exchange behavior, providing higher activation energies for the exchange compared to [10]CPP. The antiaromatic character of the [n]CDBPs paired with the cyclic conjugation leads to high HOMO energies and lowered LUMO energies with band gaps below 2 eV. This work presents a new class of the antiaromatic and nonalternant curved nanocarbons with intriguing supramolecular and ambipolar optoelectronic properties.
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Affiliation(s)
- Jan S Wössner
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Daniel Wassy
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Andrej Weber
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Marcel Bovenkerk
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Mathias Hermann
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Maximilian Schmidt
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany
| | - Birgit Esser
- Institute for Organic Chemistry, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.,Freiburg Materials Research Center (FMF), University of Freiburg, Stefan-Meier-Straße 21, 79104 Freiburg, Germany.,Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT), University of Freiburg, Georges-Kȯhler-Allee 105, 79110 Freiburg, Germany
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Grabicki N, Nguyen KTD, Weidner S, Dumele O. Confined Spaces in [n]Cyclo-2,7-pyrenylenes. Angew Chem Int Ed Engl 2021; 60:14909-14914. [PMID: 33887087 PMCID: PMC8251724 DOI: 10.1002/anie.202102809] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/29/2021] [Indexed: 12/14/2022]
Abstract
A set of strained aromatic macrocycles based on [n]cyclo-2,7-(4,5,9,10-tetrahydro)pyrenylenes is presented with size-dependent photophysical properties. The K-region of pyrene was functionalized with ethylene glycol groups to decorate the outer rim and thereby confine the space inside the macrocycle. This confined space is especially pronounced for n=5, which leads to an internal binding of up to 8.0×104 m-1 between the ether-decorated [5]cyclo-2,7-pyrenylene and shape-complementary crown ether-cation complexes. Both the ether-decorated [n]cyclo-pyrenylenes as well as one of their host-guest complexes have been structurally characterized by single-crystal X-ray analysis. In combination with computational methods the structural and thermodynamic reasons for the exceptionally strong binding have been elucidated. The presented rim confinement strategy makes cycloparaphenylenes an attractive supramolecular host family with a favorable, size-independent read-out signature and binding capabilities extending beyond fullerene guests.
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Affiliation(s)
- Niklas Grabicki
- Department of ChemistryHumboldt Universität zu BerlinBrook-Taylor-Strasse 212489BerlinGermany
| | - Khoa T. D. Nguyen
- Department of ChemistryHumboldt Universität zu BerlinBrook-Taylor-Strasse 212489BerlinGermany
| | - Steffen Weidner
- Bundesanstalt für MaterialprüfungFederal Institute for Material Research and TestingRichard-Willstätter-Strasse 1112489BerlinGermany
| | - Oliver Dumele
- Department of ChemistryHumboldt Universität zu BerlinBrook-Taylor-Strasse 212489BerlinGermany
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