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Verspeek D, Ahrens S, Wen X, Yang Y, Li YW, Junge K, Beller M. A manganese-based catalyst system for general oxidation of unactivated olefins, alkanes, and alcohols. Org Biomol Chem 2024; 22:2630-2642. [PMID: 38456330 DOI: 10.1039/d4ob00155a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Non-noble metal-based catalyst systems consisting of inexpensive manganese salts, picolinic acid and various heterocycles enable epoxidation of the challenging (terminal) unactivated olefins, selective C-H oxidation of unactivated alkanes, and O-H oxidation of secondary alcohols with aqueous hydrogen peroxide. In the presence of the in situ generated optimal manganese catalyst, epoxides are generated with up to 81% yield from alkenes and ketone products with up to 51% yield from unactivated alkanes. This convenient protocol allows the formation of the desired products under ambient conditions (room temperature, 1 bar) by employing only a slight excess of hydrogen peroxide with 2,3-butadione as a sub-stoichiometric additive.
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Affiliation(s)
- Dennis Verspeek
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Sebastian Ahrens
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Xiandong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Yong-Wang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, China
- National Energy Center for Coal to Liquids, Synfuels China Co., Ltd, Huairou District, Beijing, 101400, China
| | - Kathrin Junge
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
| | - Matthias Beller
- Leibniz-Institute für Katalyse e.V., Albert-Einstein-Straße 29a, 18059 Rostock, Germany.
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Xia Y, Zhu C, Cao F, Shen Y, Ouyang M, Zhang Y. Host-Guest Doping in Flexible Organic Crystals for Room-Temperature Phosphorescence. Angew Chem Int Ed Engl 2023; 62:e202217547. [PMID: 36585393 DOI: 10.1002/anie.202217547] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/30/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023]
Abstract
Organic single crystals (OSCs) with excellent flexibility and unique optical properties are of great importance due to their broad applicability in optical/optoelectronic devices and sensors. Nevertheless, fabricating flexible OSCs with room-temperature phosphorescence (RTP) remains a great challenge. Herein, we propose a host-guest doping strategy to achieve both RTP and flexibility of OSCs. The single-stranded crystal is highly bendable upon external force application and can immediately return to its original straight shape after removal of the stress, impressively emitting bright deep-red phosphorescence. The theoretical and experimental results demonstrate that the bright RTP arises from Förster resonance energy transfer (FRET) from the triphenylene molecules to the dopants. This strategy is both conceptually and synthetically simple and offers a universal approach for the preparation of flexible OSCs with RTP.
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Affiliation(s)
- Yang Xia
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Yingbin Road NO.688, Jinhua, 321004, P. R. China.,College of Chemical Engineering, Zhejiang University of Technology, Chaowang Road. NO. 18, Hangzhou, 310014, P. R. China
| | - Chenfei Zhu
- College of Chemical Engineering, Zhejiang University of Technology, Chaowang Road. NO. 18, Hangzhou, 310014, P. R. China
| | - Feng Cao
- Department of Engineering Technology, Huzhou College, Xueshi Road. NO. 1, Huzhou, 313000, P. R. China
| | - Yunxia Shen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Yingbin Road NO.688, Jinhua, 321004, P. R. China
| | - Mi Ouyang
- College of Chemical Engineering, Zhejiang University of Technology, Chaowang Road. NO. 18, Hangzhou, 310014, P. R. China
| | - Yujian Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, Yingbin Road NO.688, Jinhua, 321004, P. R. China
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Bhandary S, Van Deun R, Kaczmarek AM, Van Hecke K. Deformation-induced phosphorescence shift in a 2D elastically flexible organic single crystal: role of chalcogen-centered weak interactions. Chem Sci 2022; 13:10308-10314. [PMID: 36277655 PMCID: PMC9473510 DOI: 10.1039/d2sc03729g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 08/12/2022] [Indexed: 11/30/2022] Open
Abstract
Mechanically responsive organic luminescent crystals are one of the promising choices of materials for flexible photonic devices. However, the change in phosphorescence emission as a function of the flexibility of a crystal has never been reported. Our current findings demonstrate two-dimensional (2D) and one-dimensional (1D) macroscopic elastic deformability, under mechanical stress, in elastically flexible single crystals of dibenzothiophene, and its brominated derivative, respectively. Unlike the presence of dual fluorescence (FL) and room temperature phosphorescence (RTP) in dibenzothiophene single crystals, the derivative was found to show only RTP. Interestingly, upon elastic deformation, single crystals of the dual emissive dibenzothiophene show a noticeable blue shift (∼20 nm) of RTP emission when compared to their pristine crystals (straight and naturally bent). However, their FL peaks remain nearly unchanged irrespective of the crystal deformation. A hierarchy of structure-elastic functionality to RTP modulation has been quantitatively mapped by rationalizing the role of chalcogen-involved weak interactions. In response to macroscopic elastical bending, single crystals of dual emissive dibenzothiophene depict a significant blue shift (∼20 nm) of RTP emission when compared to their pristine crystals (straight and naturally bent).![]()
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Affiliation(s)
- Subhrajyoti Bhandary
- XStruct, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Rik Van Deun
- L3 – Luminescent Lanthanide Lab, Department of Chemistry, Ghent University, Krijgslaan 281-S3, 9000 Ghent, Belgium
| | - Anna M. Kaczmarek
- 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
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