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Simoens A, Kaczmarek AM, Machado IP, Van Hecke K, Stevens CV. Versatile Palladium-catalyzed intramolecular cyclization to access new luminescent azaphosphaphenalene motifs. Chemistry 2024; 30:e202303072. [PMID: 38308544 DOI: 10.1002/chem.202303072] [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: 09/21/2023] [Revised: 01/09/2024] [Accepted: 01/30/2024] [Indexed: 02/04/2024]
Abstract
Using a straightforward sequence of diphosphonylation and a Pd-catalysed concerted-metalation-deprotonation (CMD), a synthetic strategy towards polyaromatic phosphorus containing heterocycles was developed. Herein, we report the synthesis and characterization of new azaphosphaphenalenes, using easily accessible palladium catalysts and starting materials. The key tetrahydroquinoline intermediates of the reaction were synthesised via a fast and effective procedure and could be isolated as such, or further reacted towards the target polyaromatic structures. The obtained products showed interesting luminescent properties and their emission, excitation and quantum yields were evaluated.
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Affiliation(s)
- Andreas Simoens
- Department of Green Chemistry and Technology, Synthesis, Bioresources and Bioorganic Chemistry Research Group, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Anna M Kaczmarek
- NanoSensing Group, Department of Chemistry, Ghent University, Krijgslaan 281, S3, 9000, Ghent, Belgium
| | - Ian P Machado
- NanoSensing Group, Department of Chemistry, Ghent University, Krijgslaan 281, S3, 9000, Ghent, Belgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Ghent University, Krijgslaan 281, S3, 9000, Ghent, Belgium
| | - Christian V Stevens
- Department of Green Chemistry and Technology, Synthesis, Bioresources and Bioorganic Chemistry Research Group, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
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Matuszewska O, Battisti T, Ferreira RR, Biot N, Demitri N, Mézière C, Allain M, Sallé M, Mañas-Valero S, Coronado E, Fresta E, Costa RD, Bonifazi D. Tweaking the Optoelectronic Properties of S-Doped Polycyclic Aromatic Hydrocarbons by Chemical Oxidation. Chemistry 2023; 29:e202203115. [PMID: 36333273 DOI: 10.1002/chem.202203115] [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: 10/06/2022] [Revised: 11/04/2022] [Accepted: 11/04/2022] [Indexed: 11/07/2022]
Abstract
Peri-thiaxanthenothiaxanthene, an S-doped analog of peri-xanthenoxanthene, is used as a polycyclic aromatic hydrocarbon (PAH) scaffold to tune the molecular semiconductor properties by editing the oxidation state of the S-atoms. Chemical oxidation of peri-thiaxanthenothiaxanthene with H2 O2 led to the relevant sulfoxide and sulfone congeners, whereas electrooxidation gave access to sulfonium-type derivatives forming crystalline mixed valence (MV) complexes. These complexes depicted peculiar molecular and solid-state arrangements with face-to-face π-π stacking organization. Photophysical studies showed a widening of the optical bandgap upon progressive oxidation of the S-atoms, with the bis-sulfone derivative displaying the largest value (E00 =2.99 eV). While peri-thiaxanthenothiaxanthene showed reversible oxidation properties, the sulfoxide and sulfone derivatives mainly showed reductive events, corroborating their n-type properties. Electric measurements of single crystals of the MV complexes exhibited a semiconducting behavior with a remarkably high conductivity at room temperature (10-1 -10-2 S cm-1 and 10-2 -10-3 S cm-1 for the O and S derivatives, respectively), one of the highest reported so far. Finally, the electroluminescence properties of the complexes were tested in light-emitting electrochemical cells (LECs), obtaining the first S-doped mid-emitting PAH-based LECs.
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Affiliation(s)
- Oliwia Matuszewska
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Tommaso Battisti
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Ruben R Ferreira
- Institute of Organic Chemistry, University of Vienna, 1090, Vienna, Austria
| | - Nicolas Biot
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Cécile Mézière
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Magali Allain
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Marc Sallé
- MOLTECH-Anjou-UMR CNRS 6200, UNIV Angers, SFR Matrix, 2 Boulevard Lavoisier, 49045, Angers Cedex, France
| | - Samuel Mañas-Valero
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Eugenio Coronado
- Instituto de Ciencia Molecular, Universitat de València, Catedrático José Beltrán 2, 46980, Paterna, Spain
| | - Elisa Fresta
- Chair of Biogenic Functional Materials, Technical University Munich, Schulgasse 22, 94315, Straubing, Germany
| | - Rubén D Costa
- Chair of Biogenic Functional Materials, Technical University Munich, Schulgasse 22, 94315, Straubing, Germany
| | - Davide Bonifazi
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.,Institute of Organic Chemistry, University of Vienna, 1090, Vienna, Austria
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Tsurusaki A, Tahara S, Nakamura M, Matsumoto H, Kamikawa K. Synthesis, Structures, and Properties of π-Extended Phosphindolizine Derivatives. Chemistry 2023; 29:e202203321. [PMID: 36539376 DOI: 10.1002/chem.202203321] [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: 10/26/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Dibenzo[b,g]phosphindolizine oxide and three types of benzo[e]naphthophosphindolizine oxides have been synthesized by the ring-closing metathesis of benzo[b]phosphole oxide and naphthophosphole oxides with two olefin tethers. Their molecular structures and properties were revealed by X-ray crystallographic analysis, UV-vis spectroscopy, and electrochemical analysis. The number and position of the benzene rings were found to alter the structural geometry and the HOMO/LUMO energy levels, and their effects were investigated by theoretical calculations. Among the phosphindolizine oxide derivatives investigated, only benzo[e]naphtho[2,3-b]phosphindolizine oxide with the naphthalene ring fused at 2,3-positions showed weak yellow fluorescence with a large Stokes shift.
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Affiliation(s)
- Akihiro Tsurusaki
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka, 599-8531, Japan
| | - Sana Tahara
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka, 599-8531, Japan
| | - Makoto Nakamura
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka, 599-8531, Japan
| | - Hiroyo Matsumoto
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka, 599-8531, Japan
| | - Ken Kamikawa
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai, Osaka, 599-8531, Japan
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Regulska E, Hindenberg P, Espineira-Gutierrez A, Romero-Nieto C. Synthesis, Post-Functionalization and Properties of Diphosphapentaarenes. Chemistry 2023; 29:e202202769. [PMID: 36216778 PMCID: PMC10100039 DOI: 10.1002/chem.202202769] [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: 09/05/2022] [Indexed: 12/05/2022]
Abstract
Linearly-fused polyarenes are an important class of compounds with high relevance in materials science. While modifying the shape and size represents a common means to fine-tune their properties, the precise placement of heteroatoms is a strategy that is receiving an increasing deal of attention to overcome the intrinsic limitations of all-carbon structures. Thus, linearly-fused diphosphaarenes recently emerged as a novel family of molecules with striking optoelectronic properties and outstanding stability. However, the properties of diphosphaarenes are far from being benchmarked. Herein, we report the synthesis, phosphorus post-functionalization and properties of new diphosphapentaarene derivatives. We describe their synthetic limitations and unveil their potential for optoelectronic applications.
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Affiliation(s)
- Elzbieta Regulska
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Faculty of Pharmacy, University of Castilla-La Mancha, Calle Almansa 14 - Edif. Bioincubadora, 02008, Albacete, Spain
| | - Philip Hindenberg
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Faculty of Pharmacy, University of Castilla-La Mancha, Calle Almansa 14 - Edif. Bioincubadora, 02008, Albacete, Spain
| | - Adrian Espineira-Gutierrez
- Faculty of Pharmacy, University of Castilla-La Mancha, Calle Almansa 14 - Edif. Bioincubadora, 02008, Albacete, Spain
| | - Carlos Romero-Nieto
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany.,Faculty of Pharmacy, University of Castilla-La Mancha, Calle Almansa 14 - Edif. Bioincubadora, 02008, Albacete, Spain
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De’Ath P, Elsegood MRJ, Sanchez-Ballester NM, Smith MB. Low-Dimensional Architectures in Isomeric cis-PtCl 2{Ph 2PCH 2N(Ar)CH 2PPh 2} Complexes Using Regioselective-N(Aryl)-Group Manipulation. Molecules 2021; 26:molecules26226809. [PMID: 34833902 PMCID: PMC8618721 DOI: 10.3390/molecules26226809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/05/2021] [Accepted: 11/07/2021] [Indexed: 11/23/2022] Open
Abstract
The solid-state behaviour of two series of isomeric, phenol-substituted, aminomethylphosphines, as the free ligands and bound to PtII, have been extensively studied using single crystal X-ray crystallography. In the first library, isomeric diphosphines of the type Ph2PCH2N(Ar)CH2PPh2 [1a–e; Ar = C6H3(Me)(OH)] and, in the second library, amide-functionalised, isomeric ligands Ph2PCH2N{CH2C(O)NH(Ar)}CH2PPh2 [2a–e; Ar = C6H3(Me)(OH)], were synthesised by reaction of Ph2PCH2OH and the appropriate amine in CH3OH, and isolated as colourless solids or oils in good yield. The non-methyl, substituted diphosphines Ph2PCH2N{CH2C(O)NH(Ar)}CH2PPh2 [2f, Ar = 3-C6H4(OH); 2g, Ar = 4-C6H4(OH)] and Ph2PCH2N(Ar)CH2PPh2 [3, Ar = 3-C6H4(OH)] were also prepared for comparative purposes. Reactions of 1a–e, 2a–g, or 3 with PtCl2(η4-cod) afforded the corresponding square-planar complexes 4a–e, 5a–g, and 6 in good to high isolated yields. All new compounds were characterised using a range of spectroscopic (1H, 31P{1H}, FT–IR) and analytical techniques. Single crystal X-ray structures have been determined for 1a, 1b∙CH3OH, 2f∙CH3OH, 2g, 3, 4b∙(CH3)2SO, 4c∙CHCl3, 4d∙½Et2O, 4e∙½CHCl3∙½CH3OH, 5a∙½Et2O, 5b, 5c∙¼H2O, 5d∙Et2O, and 6∙(CH3)2SO. The free phenolic group in 1b∙CH3OH, 2f∙CH3OH,2g, 4b∙(CH3)2SO, 5a∙½Et2O, 5c∙¼H2O, and 6∙(CH3)2SO exhibits various intra- or intermolecular O–H∙∙∙X (X = O, N, P, Cl) hydrogen contacts leading to different packing arrangements.
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