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Shi Y, Li C, Di J, Xue Y, Jia Y, Duan J, Hu X, Tian Y, Li Y, Sun C, Zhang N, Xiong Y, Jin T, Chen P. Polycationic Open-Shell Cyclophanes: Synthesis of Electron-Rich Chiral Macrocycles, and Redox-Dependent Electronic States. Angew Chem Int Ed Engl 2024; 63:e202402800. [PMID: 38411404 DOI: 10.1002/anie.202402800] [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: 02/07/2024] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 02/28/2024]
Abstract
π-Conjugated chiral nanorings with intriguing electronic structures and chiroptical properties have attracted considerable interests in synthetic chemistry and materials science. We present the design principles to access new chiral macrocycles (1 and 2) that are essentially built on the key components of main-group electron-donating carbazolyl moieties or the π-expanded aza[7]helicenes. Both macrocycles show the unique molecular conformations with a (quasi) figure-of-eight topology as a result of the conjugation patterns of 2,2',7,7'-spirobifluorenyl in 1 and triarylamine-coupled aza[7]helicene-based building blocks in 2. This electronic nature of redox-active, carbazole-rich backbones enabled these macrocycles to be readily oxidized chemically and electrochemically, leading to the sequential production of a series of positively charged polycationic open-shell cyclophanes. Their redox-dependent electronic states of the resulting multispin polyradicals have been characterized by VT-ESR, UV/Vis-NIR absorption and spectroelectrochemical measurements. The singlet (ΔES-T=-1.29 kcal mol-1) and a nearly degenerate singlet-triplet ground state (ΔES-T(calcd)=-0.15 kcal mol-1 and ΔES-T(exp)=0.01 kcal mol-1) were proved for diradical dications 12+2⋅ and 22+2⋅, respectively. Our work provides an experimental proof for the construction of electron-donating new chiral nanorings, and more importantly for highly charged polyradicals with potential applications in chirospintronics and organic conductors.
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Affiliation(s)
- Yafei Shi
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Chenglong Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Jiaqi Di
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Yuting Xue
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Yawei Jia
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Jiaxian Duan
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Xiaoyu Hu
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Yu Tian
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Yanqiu Li
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Cuiping Sun
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
| | - Niu Zhang
- Analysis and Testing Centre, Beijing Institute of Technology, 102488, Beijing, China
| | - Yan Xiong
- Analysis and Testing Centre, Beijing Institute of Technology, 102488, Beijing, China
| | - Tianyun Jin
- Center of Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography University of California, San Diego La Jolla, 92093, USA
| | - Pangkuan Chen
- Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, Key Laboratory of Medical Molecule Science, Pharmaceutical Engineering of the Ministry of Industry and Information Technology, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 102488, China
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Xinping Wang. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Xinping Wang. Angew Chem Int Ed Engl 2020; 59:20276. [DOI: 10.1002/anie.202007997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cui Y, Xu Y, Liu X, Li Y, Wang BL, Dong Y, Li W, Lei S. Field-Induced Single-Ion Magnetic Behavior in Two Mononuclear Cobalt(II) Complexes. Chem Asian J 2019; 14:2620-2628. [PMID: 31066179 DOI: 10.1002/asia.201900258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/30/2019] [Indexed: 11/08/2022]
Abstract
The employment of a new rigid N-tridentate ligand, bis(1-chloroimidazo[1,5-a]pyridin-3-yl)pyridine (bcpp), in the construction of cobalt(II) single-ion magnets is reported. Two cobalt(II) complexes, [Co(bcpp)Cl2 ] (1) and [Co(bcpp)Br2 ] (2), have been prepared and characterized. Single-crystal XRD analyses reveal that complexes 1 and 2 are isostructural. They are pentacoordinated mononuclear cobalt(II) compounds with expected trigonal bipyramidal geometry. Both analysis of the magnetic data and ab initio calculations reveal easy-plane magnetic anisotropy (D>0) for 1 and 2. Detailed alternating current magnetic susceptibility measurements reveal the occurrence of slow magnetic relaxation behavior for the cobalt(II) centers of 1 and 2; thus indicating that both complexes are field-induced single-ion magnets.
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Affiliation(s)
- Yanfeng Cui
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China.,Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, P.R. China
| | - Yameng Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Xin Liu
- Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, P.R. China
| | - Yahong Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Bao-Lin Wang
- Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, P.R. China
| | - Yaping Dong
- Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, P.R. China
| | - Wu Li
- Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, P.R. China
| | - Shiming Lei
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
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Abbenseth J, Delony D, Neben MC, Würtele C, de Bruin B, Schneider S. Interconversion of Phosphinyl Radical and Phosphinidene Complexes by Proton Coupled Electron Transfer. Angew Chem Int Ed Engl 2019; 58:6338-6341. [PMID: 30840783 PMCID: PMC6519162 DOI: 10.1002/anie.201901470] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Indexed: 12/04/2022]
Abstract
The isolable complex [Os(PHMes*)H(PNP)] (Mes*=2,4,6-t Bu3 C6 H3 ; PNP=N{CHCHPt Bu2 }2 ) exhibits high phosphinyl radical character. This compound offers access to the phosphinidene complex [Os(PMes*)H(PNP)] by P-H proton coupled electron transfer (PCET). The P-H bond dissociation energy (BDE) was determined by isothermal titration calorimetry and supporting DFT computations. The phosphinidene product exhibits electrophilic reactivity as demonstrated by intramolecular C-H activation.
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Affiliation(s)
- Josh Abbenseth
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Daniel Delony
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Marc C. Neben
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Christian Würtele
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098XHAmsterdamThe Netherlands
| | - Sven Schneider
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
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Abbenseth J, Delony D, Neben MC, Würtele C, de Bruin B, Schneider S. Interconversion of Phosphinyl Radical and Phosphinidene Complexes by Proton Coupled Electron Transfer. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901470] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Josh Abbenseth
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Daniel Delony
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Marc C. Neben
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Christian Würtele
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA) Science Park 904 1098 XH Amsterdam The Netherlands
| | - Sven Schneider
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
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Chandrasena L, Samedov K, McKenzie I, Mozafari M, West R, Gates DP, Percival PW. Free Radical Reactivity of a Phosphaalkene Explored Through Studies of Radical Isotopologues. Angew Chem Int Ed Engl 2019; 58:297-301. [PMID: 30450733 DOI: 10.1002/anie.201810967] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/15/2018] [Indexed: 12/13/2022]
Abstract
Muonium (Mu), an H atom analogue, is employed to probe the addition of free radicals to the P=C bond of a phosphaalkene. Specifically, two unprecedented muoniated free radicals, MesP. -CMu(Me)2 (1 a, minor product) and MesPMu-C. Me2 (1 b, major product), were detected by muon spin spectroscopy (μSR) when a solution of MesP=CMe2 (1: Mes=2,4,6-trimethylphenyl) was exposed to a beam of positive muons (μ+ ). The μ+ serves as a source of Mu (that is, Mu=μ+ +e- ). To confirm the identity of the major product 1 b, its spectral features were compared to its isotopologue, MesPH-C. (Me)CH2 Mu (2 a). Conveniently, 2 a is the sole product of the reaction of MesPH(CMe=CH2 ) (2) with Mu. For all observed radicals, muon, proton, and phosphorus hyperfine coupling constants were determined by μSR and compared to DFT-calculated values.
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Affiliation(s)
- Lalangi Chandrasena
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - Kerim Samedov
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Iain McKenzie
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.,Centre for Molecular and Materials Science, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, V6T 2A3, Canada
| | - Mina Mozafari
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - Robert West
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI, 53706, USA
| | - Derek P Gates
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1, Canada
| | - Paul W Percival
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
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Chandrasena L, Samedov K, McKenzie I, Mozafari M, West R, Gates DP, Percival PW. Free Radical Reactivity of a Phosphaalkene Explored Through Studies of Radical Isotopologues. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810967] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Lalangi Chandrasena
- Department of Chemistry; Simon Fraser University; 8888 University Drive Burnaby BC V5A 1S6 Canada
| | - Kerim Samedov
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Iain McKenzie
- Department of Chemistry; Simon Fraser University; 8888 University Drive Burnaby BC V5A 1S6 Canada
- Centre for Molecular and Materials Science; TRIUMF; 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada
| | - Mina Mozafari
- Department of Chemistry; Simon Fraser University; 8888 University Drive Burnaby BC V5A 1S6 Canada
| | - Robert West
- Department of Chemistry; University of Wisconsin-Madison; 1101 University Avenue Madison WI 53706 USA
| | - Derek P. Gates
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver BC V6T 1Z1 Canada
| | - Paul W. Percival
- Department of Chemistry; Simon Fraser University; 8888 University Drive Burnaby BC V5A 1S6 Canada
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Fang Y, Zhang L, Cheng C, Zhao Y, Abe M, Tan G, Wang X. Experimental Observation of Thermally Excited Triplet States of Heavier Group 15 Element Centered Diradical Dianions. Chemistry 2018; 24:3156-3160. [DOI: 10.1002/chem.201706060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Yong Fang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
| | - Li Zhang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
| | - Cheng Cheng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
| | - Manabu Abe
- Department of Chemistry, Graduate School of Science; Hiroshima University; 1-3-1 Kagamiyama Higashi-Hiroshima Japan
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures; Nanjing University; Nanjing 210023 P. R. China
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