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Sharma V, Khan H, Walker M, Ahmad H, Thanai A, Marszalek T, Schollmeyer D, Baumgarten M, Evans EW, Keerthi A. Peri-Alkylated Terrylenes and Ternaphthalenes Building-Blocks Towards Multi-Edge Nanographenes. Chemistry 2024; 30:e202401462. [PMID: 38664199 DOI: 10.1002/chem.202401462] [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: 04/15/2024] [Indexed: 06/04/2024]
Abstract
Since its first synthesis by Clar in 1948, terrylene - a fully connected ternaphthalene oligomer via naphthalene's peri-positions - has gained special focus within the rylene family, drawing interest for its unique chemical, structural, optoelectronic and single photon emission properties. In this study, we introduce a novel synthetic pathway that enhances the solubility of terrylene derivatives through complete peri-alkylation, while also facilitating extensions at the bay-positions. This approach not only broadens the scope of terrylene's chemical versatility but also opens new avenues for developing solution processable novel multi-edge nanographenes and tailoring electronic energy levels through topological edge structures. Our findings include a comprehensive structural and spectroscopic characterization along with transient absorption spectroscopy and photophysics of both the synthesized peri-alkylated terrylene and its phenylene-fused derivative.
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Affiliation(s)
- Vikas Sharma
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Hassan Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Michael Walker
- Department of Chemistry, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
- Centre for Integrative Semiconductor Materials, Swansea University, Fabian Way, Swansea, SA1 8EN, UK
| | - Hamid Ahmad
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, D-55128, Germany
| | - Anmol Thanai
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Tomasz Marszalek
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, D-55128, Germany
| | - Dieter Schollmeyer
- Department of Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Martin Baumgarten
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, D-55128, Germany
| | - Emrys W Evans
- Department of Chemistry, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
- Centre for Integrative Semiconductor Materials, Swansea University, Fabian Way, Swansea, SA1 8EN, UK
| | - Ashok Keerthi
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- National Graphene Institute, The University of Manchester, Manchester, M13 9PL, UK
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Bao ST, Louie S, Jiang H, Jiang Q, Sun S, Steigerwald ML, Nuckolls C, Jin Z. Near-Infrared, Organic Chiroptic Switch with High Dissymmetry Factors. J Am Chem Soc 2024; 146:51-56. [PMID: 38110244 DOI: 10.1021/jacs.3c10578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Here we unveil a chiral molecular redox switch derived from PDI-based twistacenes─chPDI[2] that has the remarkable attributes of high-intensity and a broadband chiral response. This material exhibits facile, stable, and reversible multistate chiroptical switching behavior over a broad active wavelength range close to 700 nm, encompassing ultraviolet, visible, and near-infrared regions. Upon reduction, chPDI[2] exhibits a substantial increase in the amplitude of its circular dichroic response, with an outstanding |ΔΔε| > 300 M-1 cm-1 and a high dissymmetry factor of 3 × 10-2 at 960 nm. DFT calculations suggest that the long wavelength CD signal for doubly reduced chPDI[2] originates from excitation of the PDI backbone to the π* orbital of the bridging alkene. Importantly, the dimer's molecular contortion facilitates ionic diffusion, enabling chiral switching in solid state films. The high dissymmetry factors and near-infrared response establish chPDI[2] as a unique chiroptic switch.
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Affiliation(s)
- Si Tong Bao
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shayan Louie
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Haoyu Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Qifeng Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shantao Sun
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Michael L Steigerwald
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Zexin Jin
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310030, China
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Saal F, Swain A, Schmiedel A, Holzapfel M, Lambert C, Ravat P. Push-pull [7]helicene diimide: excited-state charge transfer and solvatochromic circularly polarised luminescence. Chem Commun (Camb) 2023; 59:14005-14008. [PMID: 37941499 DOI: 10.1039/d3cc04470j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
In this communication we describe a helically chiral push-pull molecule named 9,10-dimethoxy-[7]helicene diimide, displaying fluorescence (FL) and circularly polarised luminescence (CPL) over nearly the entire visible spectrum dependent on solvent polarity. The synthesised molecule exhibits an unusual solvent polarity dependence of FL quantum yield and nonradiative rate constant, as well as remarkable gabs and glum values along with high configurational stability.
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Affiliation(s)
- Fridolin Saal
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
| | - Asim Swain
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
| | - Alexander Schmiedel
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
| | - Marco Holzapfel
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
| | - Christoph Lambert
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
| | - Prince Ravat
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany.
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