1
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Sanil G, Krzeszewski M, Chaładaj W, Danikiewicz W, Knysh I, Dobrzycki Ł, Staszewska-Krajewska O, Cyrański MK, Jacquemin D, Gryko DT. Gold-Catalyzed 1,2-Aryl Shift and Double Alkyne Benzannulation. Angew Chem Int Ed Engl 2023; 62:e202311123. [PMID: 37823245 DOI: 10.1002/anie.202311123] [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: 08/02/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/13/2023]
Abstract
The tandem intramolecular hydroarylation of alkynes accompanied by a 1,2-aryl shift is described. Harnessing the unique electron-rich character of 1,4-dihydropyrrolo[3,2-b]pyrrole scaffold, we demonstrate that the hydroarylation of alkynes proceeds at the already occupied positions 2 and 5 leading to a 1,2-aryl shift. Remarkably, the reaction proceeds only in the presence of cationic gold catalyst, and it leads to heretofore unknown π-expanded, centrosymmetric pyrrolo[3,2-b]pyrroles. The utility is verified in the preparation of 13 products that bear six conjugated rings. The observed compatibility with various functional groups allows for increased tunability with regard to the photophysical properties as well as providing sites for further functionalization. Computational studies of the reaction mechanism revealed that the formation of the six-membered rings accompanied with a 1,2-aryl shift is both kinetically and thermodynamically favourable over plausible formation of products containing 7-membered rings. Steady-state UV/Visible spectroscopy reveals that upon photoexcitation, the prepared S-shaped N-doped nanographenes undergo mostly radiative relaxation leading to large fluorescence quantum yields. Their optical properties are rationalized through time-dependent density functional theory calculations. We anticipate that this chemistry will empower the creation of new materials with various functionalities.
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Affiliation(s)
- Gana Sanil
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Wojciech Chaładaj
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Iryna Knysh
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000, Nantes, France
| | - Łukasz Dobrzycki
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | | | - Michał K Cyrański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Denis Jacquemin
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000, Nantes, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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2
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Izquierdo-García P, Fernández-García JM, Perles J, Fernández I, Martín N. Electronic Control of the Scholl Reaction: Selective Synthesis of Spiro vs Helical Nanographenes. Angew Chem Int Ed Engl 2023; 62:e202215655. [PMID: 36495528 PMCID: PMC10107473 DOI: 10.1002/anie.202215655] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/07/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
Scholl oxidation has become an essential reaction in the bottom-up synthesis of molecular nanographenes. Herein, we describe a Scholl reaction controlled by the electronic effects on the starting substrate (1 a, b). Anthracene-based polyphenylenes lead to spironanographenes under Scholl conditions. In contrast, an electron-deficient anthracene substrate affords a helically arranged molecular nanographene formed by two orthogonal dibenzo[fg,ij]phenanthro-[9,10,1,2,3-pqrst]pentaphene (DBPP) moieties linked through an octafluoroanthracene core. Density Functional Theory (DFT) calculations predict that electronic effects control either the first formation of spirocycles and subsequent Scholl reaction to form spironanographene 2, or the expected dehydrogenation reaction leading solely to the helical nanographene 3. The crystal structures of four of the new spiro compounds (syn 2, syn 9, anti 9 and syn 10) were solved by single crystal X-ray diffraction. The photophysical properties of the new molecular nanographene 3 reveal a remarkable dual fluorescent emission.
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Affiliation(s)
- Patricia Izquierdo-García
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avd. de la Complutense, S/N, 28040, Madrid, Spain
| | - Jesús M Fernández-García
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avd. de la Complutense, S/N, 28040, Madrid, Spain
| | - Josefina Perles
- Laboratorio de Difracción de Rayos X de Monocristal, SIdI, Universidad Autónoma de Madrid, c/Francisco Tomás y Valiente, 7 Campus de Cantoblanco, 28049, Madrid, Spain
| | - Israel Fernández
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avd. de la Complutense, S/N, 28040, Madrid, Spain
| | - Nazario Martín
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avd. de la Complutense, S/N, 28040, Madrid, Spain.,IMDEA-Nanociencia, C/Faraday, 9, Campus de Cantoblanco, 28049, Madrid, Spain
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3
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Krzeszewski M, Dobrzycki Ł, Sobolewski AL, Cyrański MK, Gryko DT. Bowl-Shaped Pentagon- and Heptagon-Embedded Nanographene Containing a Central Pyrrolo[3,2-b]pyrrole Core. Angew Chem Int Ed Engl 2021; 60:14998-15005. [PMID: 33831270 DOI: 10.1002/anie.202104092] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Indexed: 11/11/2022]
Abstract
A bowl-shaped nitrogen-doped nanographene composed of a pyrrolo[3,2-b]pyrrole core substituted with six arene rings circularly bonded with one another has been prepared via a concise synthetic strategy encompassing the multicomponent tetraarylpyrrolopyrrole (TAPP) synthesis, the Scholl reaction, and intramolecular direct arylation. This synthesis represents the first case of programmed sequential intramolecular direct arylation reactions utilizing the different reactivity of C-Br and C-Cl bonds. The target compound contains two central pentagons confined between two adjacent heptagons-the inverse Stone-Thrower-Wales topology. The presence of both five- and seven-membered rings in the final structure is responsible for interesting properties such as a perpendicularly aligned dipole moment, absorption and fluorescence in the orange-red region, weak emission originating from the charge-transfer character of a low-energy absorption band, and a high lying HOMO. In the solid state slipped convex-to-convex π-π stacking dominates.
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Affiliation(s)
- Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224, Warsaw, Poland
| | - Łukasz Dobrzycki
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Andrzej L Sobolewski
- Institute of Physics Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warsaw, Poland
| | - Michał K Cyrański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224, Warsaw, Poland
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4
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Krzeszewski M, Dobrzycki Ł, Sobolewski AL, Cyrański MK, Gryko DT. Bowl‐Shaped Pentagon‐ and Heptagon‐Embedded Nanographene Containing a Central Pyrrolo[3,2‐
b
]pyrrole Core. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104092] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Maciej Krzeszewski
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44–52 01-224 Warsaw Poland
| | - Łukasz Dobrzycki
- Faculty of Chemistry University of Warsaw Pasteura 1 02-093 Warsaw Poland
| | - Andrzej L. Sobolewski
- Institute of Physics Polish Academy of Sciences Al. Lotników 32/46 02-668 Warsaw Poland
| | - Michał K. Cyrański
- Faculty of Chemistry University of Warsaw Pasteura 1 02-093 Warsaw Poland
| | - Daniel T. Gryko
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44–52 01-224 Warsaw Poland
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5
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Tasior M, Vakuliuk O, Koga D, Koszarna B, Górski K, Grzybowski M, Kielesiński Ł, Krzeszewski M, Gryko DT. Method for the Large-Scale Synthesis of Multifunctional 1,4-Dihydro-pyrrolo[3,2- b]pyrroles. J Org Chem 2020; 85:13529-13543. [PMID: 32907329 PMCID: PMC7656515 DOI: 10.1021/acs.joc.0c01665] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
![]()
A thorough investigation has enabled
the optimization of the synthesis
of 1,4-dihydro-pyrrolo[3,2-b]pyrroles. Although salts
of such metals as vanadium, niobium, cerium, and manganese were found
to facilitate the formation of 1,4-dihydro-pyrrolo[3,2-b]pyrroles from amines, aldehydes, and diacetyl, we confirmed that
iron salts are the most efficient catalysts. The conditions identified
(first step: toluene/AcOH = 1:1, 1 h, 50 °C; second step: toluene/AcOH
= 1:1, Fe(ClO4)3·H2O, 16 h,
50 °C) resulted in the formation of tetraarylpyrrolo[3,2-b]pyrroles in a 6–69% yield. For the first time,
very electron-rich substituents (4-Me2NC6H4, 3-(OH)C6H4, pyrrol-2-yl) originating
from aldehydes and sterically hindered substituents (2-ClC6H4, 2-BrC6H4, 2-CNC6H4, 2-(CO2Me)C6H4, 2-(TMS-C≡C)C6H4) present on anilines can be appended to the
pyrrolo[3,2-b]pyrrole core. It is now also possible
to prepare 1,4-dihydropyrrolo[3,2-b]pyrroles bearing
an ordered arrangement of N-substituents and C-substituents ranging from coumarin, quinoline, phthalimide
to truxene. These advances in scope enable independent regulations
of many desired photophysical properties, including the Stokes shift
value and emission color ranging from violet-blue through deep blue,
green, yellow to red. Simultaneously, the optimized conditions have
finally allowed the synthesis of these extremely promising heterocycles
in amounts of more than 10 g per run without a concomitant decrease
in yield or product contamination. Empowered with better functional
group compatibility, novel derivatization strategies were developed.
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Affiliation(s)
- Mariusz Tasior
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Olena Vakuliuk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Daiki Koga
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Beata Koszarna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Krzysztof Górski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Marek Grzybowski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Łukasz Kielesiński
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
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6
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Pang L, Paxton NC, Ren J, Liu F, Zhan H, Woodruff MA, Bo A, Gu Y. Development of Mechanically Enhanced Polycaprolactone Composites by a Functionalized Titanate Nanofiller for Melt Electrowriting in 3D Printing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:47993-48006. [PMID: 33044824 DOI: 10.1021/acsami.0c14831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Three-dimensional (3D) printing technologies are widely applied in various industries and research fields and are currently the subject of intensive investigation and development. However, high-performance materials that are suitable for 3D printing are still in short supply, which is a major limitation for 3D printing, particularly for biomedical applications. The physicochemical properties of single constituent materials may not be sufficient to meet the needs of modern biotechnology development and production. To enhance the materials' performance and broaden their applications, this work designed and tested a series of titanate nanofiller (nanowire and nanotube)-enhanced polycaprolactone (PCL) composites that were 3D-printable and provided superior mechanical properties. By grafting two different functional groups (phenyl- and thiol-terminated ligands), the nanofiller surface showed improved hydrophobicity, which significantly improved their dispersion in the PCL matrix. After characterizing the surface modification, we evaluated the significance of the homogeneity of the ceramic nanofiller in terms of printability, formability, and mechanical strength. Melt electrowriting additive manufacturing was used to fabricate microfibers of PCL and PCL/nanofiller composites. Improved nanofiller dispersion enabled intact and uniform sample morphology, and in contrast, nanofiller aggregation greatly varied the viscosity during the printing process, which could result in poorly printed structures. Importantly, the modified ceramic/PCL composite delivered enhanced and stable mechanical properties, where its Young's modulus was measured to be 1.67 GPa, which is more than 7 times higher compared to that of pristine PCL (0.22 GPa). Retaining the cell safety properties (comparable to PCL), the concept of enhancing biocompatible polymers with modified nanofillers shows great potential in the field of customized 3D printing for biomedicine.
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Affiliation(s)
- Le Pang
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Naomi C Paxton
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Jiongyu Ren
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Fan Liu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
- School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430305, China
| | - Haifei Zhan
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Maria A Woodruff
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Arixin Bo
- INM-Leibniz Institute for New Materials, Saarbrücken 66123, Germany
| | - Yuantong Gu
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland 4001, Australia
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7
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Dhanasekar E, Kannan T, Venkatesan R, Perumal PT, Kamalraja J. Metal-Free and Regioselective Synthesis of Substituted and Fused Chromenopyrrole Scaffolds via the Divergent Reactivity of α-Azido Ketones in Water. J Org Chem 2020; 85:9631-9649. [PMID: 32628472 DOI: 10.1021/acs.joc.0c00978] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A green and simple approach was developed for the regioselective synthesis of structurally diverse chromenopyrrole frameworks from 3-formylchromones, active methylenes, and α-azido ketones using piperidine as a catalyst in the aqueous medium through a tandem one-pot multicomponent reaction. Further, the synthesized pyrrole framework was successfully converted into biologically significant 6-azaindole derivatives in a simple synthetic transformation. An exciting feature of this synthetic protocol is that the reaction mechanism and formation of the products depend on the nature of the active methylene used. This approach has several advantages such as a transition-metal-free catalyst, a short reaction time, easy separation, an excellent yield, practically simple execution, high regioselectivity, very good atom economy, low E-factor, and no requirement of toxic solvents and chromatographic purification.
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Affiliation(s)
- Elumalai Dhanasekar
- Department of Chemistry, Pondicherry University, R.V. Nagar, Kalapet, Puducherry 605014, India
| | - Tharanikkarasu Kannan
- Department of Chemistry, Pondicherry University, R.V. Nagar, Kalapet, Puducherry 605014, India
| | - Rengarajan Venkatesan
- Department of Chemistry, Pondicherry University, R.V. Nagar, Kalapet, Puducherry 605014, India
| | | | - Jayabal Kamalraja
- Department of Chemistry, Pondicherry University, R.V. Nagar, Kalapet, Puducherry 605014, India
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8
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Grzybowski M, Sadowski B, Butenschön H, Gryko DT. Synthetic Applications of Oxidative Aromatic Coupling-From Biphenols to Nanographenes. Angew Chem Int Ed Engl 2020; 59:2998-3027. [PMID: 31342599 PMCID: PMC7027897 DOI: 10.1002/anie.201904934] [Citation(s) in RCA: 173] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 06/28/2019] [Indexed: 12/31/2022]
Abstract
Oxidative aromatic coupling occupies a fundamental place in the modern chemistry of aromatic compounds. It is a method of choice for the assembly of large and bewildering architectures. Considerable effort was also devoted to applications of the Scholl reaction for the synthesis of chiral biphenols and natural products. The ability to form biaryl linkages without any prefunctionalization provides an efficient pathway to many complex structures. Although the chemistry of this process is only now becoming fully understood, this reaction continues to both fascinate and challenge researchers. This is especially true for heterocoupling, that is, oxidative aromatic coupling with the chemoselective formation of a C-C bond between two different arenes. Analysis of the progress achieved in this field since 2013 reveals that many groups have contributed by pushing the boundary of structural possibilities, expanding into surface-assisted (cyclo)dehydrogenation, and developing new reagents.
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Affiliation(s)
- Marek Grzybowski
- Institute of Organic ChemistryPolish Academy of SciencesKasprzaka 44/5201-224WarsawPoland
| | - Bartłomiej Sadowski
- Institute of Organic ChemistryPolish Academy of SciencesKasprzaka 44/5201-224WarsawPoland
| | - Holger Butenschön
- Institut für Organische ChemieLeibniz Universität HannoverSchneiderberg 1B30167HannoverGermany
| | - Daniel T. Gryko
- Institute of Organic ChemistryPolish Academy of SciencesKasprzaka 44/5201-224WarsawPoland
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9
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Grzybowski M, Sadowski B, Butenschön H, Gryko DT. Syntheseanwendungen der oxidativen aromatischen Kupplung – von Biphenolen zu Nanographenen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904934] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Marek Grzybowski
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warschau Polen
| | - Bartłomiej Sadowski
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warschau Polen
| | - Holger Butenschön
- Institut für Organische Chemie Leibniz Universität Hannover Schneiderberg 1B 30167 Hannover Deutschland
| | - Daniel T. Gryko
- Institute of Organic Chemistry Polish Academy of Sciences Kasprzaka 44/52 01-224 Warschau Polen
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10
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Wu D, Zheng J, Xu C, Kang D, Hong W, Duan Z, Mathey F. Phosphindole fused pyrrolo[3,2-b]pyrroles: a new single-molecule junction for charge transport. Dalton Trans 2019; 48:6347-6352. [PMID: 30994138 DOI: 10.1039/c9dt01299k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of phosphindole fused ladder-type heteroacenes with a pyrrolo[3,2-b]pyrrole core were synthesized and characterized, which show good luminescence efficiency, high thermostability and tunable conductance.
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Affiliation(s)
- Di Wu
- International Phosphorus Laboratory, International Joint Research Laboratory for Functional Organophosphorus Materials of Henan Province, College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
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11
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Wei Z, Wu XH, Luo P, Wang JY, Li K, Zang SQ. Matrix Coordination Induced Emission in a Three-Dimensional Silver Cluster-Assembled Material. Chemistry 2019; 25:2750-2756. [PMID: 30536452 DOI: 10.1002/chem.201805381] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/24/2018] [Indexed: 01/18/2023]
Abstract
Developing highly luminescent and extensively stable silver cluster-assembled materials (SCAMs) from the inferior luminogens and unstable silver cluster is an important and challenging issue. Herein, a new luminescent three-dimensional SCAM (Ag12 CPPP, [Ag12 (StBu)6 (CF3 COO)6 (CPPP)2 (DMAc)12 ]n ; CPPP=2,5-bis(4-cyanophenyl)-1,4-bis(4-(pyridine-4-yl)-phenyl)-1,4-dihydropyrrolo[3,2-b]pyrrole, DMAc=dimethylacetamide) was designed and synthesized with a quadridentate rigid emission ligand (CPPP) and a silver-chalcogenolate cluster (SCC) containing 12 AgI atoms. The luminescence study indicates that CPPP is an aggregation-caused quenching (ACQ) molecule with twisted intramolecular charge transfer (TICT) character. Benefiting from the strong immobilization effect in the robust framework, the quantum yield of CPPP is greatly enhanced in Ag12 CPPP compared with that of CPPP in solution or in the solid state. As a result, Ag12 CPPP exhibits typical matrix coordination induced emission (MCIE) effect. Such efficient rigidifying methodology provides a promising approach for enhancing luminescence of ACQ molecules in an aggregated state and strengthening the silver cluster in an unstable state.
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Affiliation(s)
- Zhong Wei
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Xiao-Hui Wu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Peng Luo
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Jia-Yin Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Kai Li
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Shuang-Quan Zang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
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12
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Mishra S, Krzeszewski M, Pignedoli CA, Ruffieux P, Fasel R, Gryko DT. On-surface synthesis of a nitrogen-embedded buckybowl with inverse Stone-Thrower-Wales topology. Nat Commun 2018; 9:1714. [PMID: 29712921 PMCID: PMC5928119 DOI: 10.1038/s41467-018-04144-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/06/2018] [Indexed: 12/02/2022] Open
Abstract
Curved π-conjugated polycyclic aromatic hydrocarbons, buckybowls, constitute an important class of materials with wide applications in materials science. Heteroatom doping of buckybowls is a viable route to tune their intrinsic physicochemical properties. However, synthesis of heteroatom-doped buckybowls is a challenging task. We report on a combined in-solution and on-surface synthetic strategy toward the fabrication of a buckybowl containing two fused nitrogen-doped pentagonal rings. We employ ultra-high-resolution scanning tunneling microscopy and spectroscopy, in combination with density functional theory calculations to characterize the final compound. The buckybowl contains a unique combination of non-hexagonal rings at its core, identified as the inverse Stone–Thrower–Wales topology, resulting in a distinctive bowl-opening-down conformation of the buckybowl on the surface. Our controlled design of non-alternant, heteroatom-doped polycyclic aromatic frameworks with established bottom-up fabrication techniques opens new opportunities in the synthesis of carbon nanostructures with the perspective of engineering properties of graphene-based devices. Heteroatom doping of buckybowls is a viable route to tune their intrinsic physico-chemical properties, but their synthesis remains challenging. Here, the authors report on a combined in-solution and on-surface synthetic strategy towards the fabrication of a buckybowl containing two fused nitrogen-doped pentagonal rings.
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Affiliation(s)
- Shantanu Mishra
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, Warsaw, 01-224, Poland
| | - Carlo A Pignedoli
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Pascal Ruffieux
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland
| | - Roman Fasel
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf, 8600, Switzerland. .,Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern, 3012, Switzerland.
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, Warsaw, 01-224, Poland.
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13
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Krzeszewski M, Sahara K, Poronik YM, Kubo T, Gryko DT. Unforeseen 1,2-Aryl Shift in Tetraarylpyrrolo[3,2-b]pyrroles Triggered by Oxidative Aromatic Coupling. Org Lett 2018. [DOI: 10.1021/acs.orglett.8b00223] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Keisuke Sahara
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yevgen M. Poronik
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Takashi Kubo
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Daniel T. Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Krzeszewski M, Gryko D, Gryko DT. The Tetraarylpyrrolo[3,2-b]pyrroles-From Serendipitous Discovery to Promising Heterocyclic Optoelectronic Materials. Acc Chem Res 2017; 50:2334-2345. [PMID: 28795799 DOI: 10.1021/acs.accounts.7b00275] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Progress in organic optoelectronics requires compounds possessing a suitable combination of photophysical and electronic properties. Another key constraint encompasses the availability of feasible, and hopefully scalable, synthetic procedures for preparing the molecular scaffolds of interest. A multicomponent reaction of aromatic aldehydes, aromatic amines, and butane-2,3-dione that was discovered in 2013 gives straightforward access to previously unavailable 1,2,4,5-tetraarylpyrrolo[3,2-b]pyrroles. These dyes are examples of heteropentalenes-a class of 10-π-electron aromatic compounds. The unsurpassed variety of aromatic aldehydes and primary aromatic amines, which are commercially available or easy to prepare, allows for potential routes to thousands of 1,2,4,5-tetraarylpyrrolo[3,2-b]pyrroles that are currently unknown. This synthetic procedure offers a means for preparing the pyrrolopyroles in gram quantities and isolating them by simple filtration. Typically, the construction of an aromatic core is merely the first phase in a long procedure toward multistep functionalization. Conversely, the synthesis of 1,2,4,5-tetraarylpyrrolo[3,2-b]pyrroles leads to preinstalled substituents in frames with C2 symmetry, which "opens Sesame" to a wealth of structural possibilities. In addition, steric hindrance of the aldehyde components, rather than presenting a problem, is beneficial for increasing the yields of the products. This feature provides invaluable routes for the synthesis of a broad range of π-extended systems possessing the pyrrolo[3,2-b]pyrrole core in just a few steps. Indeed, this approach has enabled the preparation of a large number of previously unknown ladder-type heteroacenes possessing additional rings based on carbon-carbon, carbon-nitrogen, and nitrogen-nitrogen double bonds as well as nitrogen-boron single bonds. This set of chromophores includes planar and curved structures bearing up to 14 conjugated rings. 1,2,4,5-Tetraarylpyrrolo[3,2-b]pyrroles manifest broad absorption bands between about 300 and 450 nm, strong violet-blue or blue fluorescence with typical quantum yields of ∼60%, significant Stokes shifts ranging between 3000 and 5800 cm-1, and emission while in the solid state. Should the two peripheral aryl groups have an electron-deficient character, the two-photon absorption cross section also becomes pronounced, i.e., ∼400 GM. Perhaps the most important feature of these dyes is their strong solvatofluorochromism, which predestines their value as environment-sensitive probes. Extension of the π-conjugation of 1,2,4,5-tetraarylpyrrolo[3,2-b]pyrroles enables further modifications of their photophysical properties, such as shifting the emission bathochromically, increasing the Stokes shift beyond 10 000 cm-1, and attaining solvatofluorochromism for curved, butterfly-shaped analogues without a decrease in emission intensity when the solvent polarity is increased. Common features of these chromophores include a significant difference between the geometries of their relaxed ground and relaxed excited states as well as strong electronic coupling through their aromatic cores. Past and future intense exploration of the wide chemical space built around the pyrrolo[3,2-b]pyrrole skeleton offers unprecedented opportunities for comprehensive elucidation of how photoexcitation increases the electronic coupling through biaryl linkages.
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Affiliation(s)
- Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Daniel T. Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
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15
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Shi X, Soulé JF, Doucet H. Synthesis of Phenanthrothiazoles and 1,2-Di(heteroaryl)benzenes through Successive Pd-Catalyzed Direct Arylations. J Org Chem 2017; 82:3886-3894. [DOI: 10.1021/acs.joc.6b03023] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xinzhe Shi
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”, Campus de Beaulieu, 35042 Rennes, France
| | - Jean-François Soulé
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”, Campus de Beaulieu, 35042 Rennes, France
| | - Henri Doucet
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”, Campus de Beaulieu, 35042 Rennes, France
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