Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate
Herein, we report the preparation of chiral, one-dimensional coordination polymers based on trinuclear paddlewheel helices [M3(dpa)4]2+ (M = Co(II) and Ni(II); dpa = the anion of 2,2′-dipyridylamine). Enantiomeric resolution of a racemic mixture of [M3(dpa)4]2+ complexes was achieved by chiral recog...
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| Format: | Article |
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MDPI AG
2018-03-01
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| Series: | Polymers |
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| Online Access: | http://www.mdpi.com/2073-4360/10/3/311 |
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| author | Ángela Valentín-Pérez Ahmad Naim Elizabeth A. Hillard Patrick Rosa Miguel Cortijo |
| author_facet | Ángela Valentín-Pérez Ahmad Naim Elizabeth A. Hillard Patrick Rosa Miguel Cortijo |
| author_sort | Ángela Valentín-Pérez |
| collection | DOAJ |
| description | Herein, we report the preparation of chiral, one-dimensional coordination polymers based on trinuclear paddlewheel helices [M3(dpa)4]2+ (M = Co(II) and Ni(II); dpa = the anion of 2,2′-dipyridylamine). Enantiomeric resolution of a racemic mixture of [M3(dpa)4]2+ complexes was achieved by chiral recognition of the respective enantiomer by [Δ-As2(tartrate)2]2− or [Λ-As2(tartrate)2]2− in N,N-dimethylformamide (DMF), affording crystalline coordination polymers formed from [(Δ-Co3(dpa)4)(Λ-As2(tartrate)2)]·3DMF (Δ-1), [(Λ-Co3(dpa)4)(Δ-As2(tartrate)2)]·3DMF (Λ-1), [(Δ-Ni3(dpa)4)(Λ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Δ-2) or [(Λ-Ni3(dpa)4)(Δ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Λ-2) repeating units. UV-visible circular dichroism spectra of the complexes in DMF solutions demonstrate the efficient isolation of optically active species. The helicoidal [M3(dpa)4]2+ units that were obtained display high stability towards racemization as shown by the absence of an evolution of the dichroic signals after several days at room temperature and only a small decrease of the signal after 3 h at 80 °C. |
| first_indexed | 2024-04-13T14:31:21Z |
| format | Article |
| id | doaj.art-0af5565341ab47d6a8c5a277e4503214 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-04-13T14:31:21Z |
| publishDate | 2018-03-01 |
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| record_format | Article |
| series | Polymers |
| spelling | doaj.art-0af5565341ab47d6a8c5a277e45032142022-12-22T02:43:10ZengMDPI AGPolymers2073-43602018-03-0110331110.3390/polym10030311polym10030311Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl TartrateÁngela Valentín-Pérez0Ahmad Naim1Elizabeth A. Hillard2Patrick Rosa3Miguel Cortijo4Centre National de la Recherche Scientifique, Centre de Recherche Paul Pascal, UMR 5031, 33600 Pessac, FranceCentre National de la Recherche Scientifique, Institut de Chimie de la Matière Condensée de Bordeaux, UMR 5026, 33600 Pessac, FranceCentre National de la Recherche Scientifique, Centre de Recherche Paul Pascal, UMR 5031, 33600 Pessac, FranceCentre National de la Recherche Scientifique, Institut de Chimie de la Matière Condensée de Bordeaux, UMR 5026, 33600 Pessac, FranceCentre National de la Recherche Scientifique, Centre de Recherche Paul Pascal, UMR 5031, 33600 Pessac, FranceHerein, we report the preparation of chiral, one-dimensional coordination polymers based on trinuclear paddlewheel helices [M3(dpa)4]2+ (M = Co(II) and Ni(II); dpa = the anion of 2,2′-dipyridylamine). Enantiomeric resolution of a racemic mixture of [M3(dpa)4]2+ complexes was achieved by chiral recognition of the respective enantiomer by [Δ-As2(tartrate)2]2− or [Λ-As2(tartrate)2]2− in N,N-dimethylformamide (DMF), affording crystalline coordination polymers formed from [(Δ-Co3(dpa)4)(Λ-As2(tartrate)2)]·3DMF (Δ-1), [(Λ-Co3(dpa)4)(Δ-As2(tartrate)2)]·3DMF (Λ-1), [(Δ-Ni3(dpa)4)(Λ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Δ-2) or [(Λ-Ni3(dpa)4)(Δ-As2(tartrate)2)]·(4 − n)DMF∙nEt2O (Λ-2) repeating units. UV-visible circular dichroism spectra of the complexes in DMF solutions demonstrate the efficient isolation of optically active species. The helicoidal [M3(dpa)4]2+ units that were obtained display high stability towards racemization as shown by the absence of an evolution of the dichroic signals after several days at room temperature and only a small decrease of the signal after 3 h at 80 °C.http://www.mdpi.com/2073-4360/10/3/311chiral coordination polymersenantiomeric resolutionextended metal atom chainscircular dichroismX-ray crystallography |
| spellingShingle | Ángela Valentín-Pérez Ahmad Naim Elizabeth A. Hillard Patrick Rosa Miguel Cortijo Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate Polymers chiral coordination polymers enantiomeric resolution extended metal atom chains circular dichroism X-ray crystallography |
| title | Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate |
| title_full | Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate |
| title_fullStr | Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate |
| title_full_unstemmed | Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate |
| title_short | Enantiopure Chiral Coordination Polymers Based on Polynuclear Paddlewheel Helices and Arsenyl Tartrate |
| title_sort | enantiopure chiral coordination polymers based on polynuclear paddlewheel helices and arsenyl tartrate |
| topic | chiral coordination polymers enantiomeric resolution extended metal atom chains circular dichroism X-ray crystallography |
| url | http://www.mdpi.com/2073-4360/10/3/311 |
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