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Shah SJ, Pandit YA, Garribba E, Ishida M, Rath SP. Stable Dication Diradicals of Triply Fused Metallo Chlorin-Porphyrin Heterodimers: Impact of the Bridge on the Control of Spin Coupling to Reactivity. Chemistry 2023; 29:e202301963. [PMID: 37602834 DOI: 10.1002/chem.202301963] [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: 06/20/2023] [Revised: 08/16/2023] [Accepted: 08/16/2023] [Indexed: 08/22/2023]
Abstract
We report an unexpected rearrangement, controlled by the nature of the bridge, leading to the formation of novel, remarkably stable triply fused dinickel(II)/dicopper(II) chlorin-porphyrin dication diradical heterodimers in excellent yields. Here, a dipyrromethene bridge gets completely fused between two porphyrin macrocycles with two new C-C and one C-N bonds. The two macrocycles exhibit extensive π-conjugation through the bridge, which results in an antiferromagnetic coupling between the two π-cation radicals. In addition, the macrocyclic distortion also favours a rare intramolecular ferromagnetic interaction between the CuII and π-cation radical spins to form a triplet state. The structural and electronic perturbation in the unconjugated dication diradical possibly enables the bridging pyrrolic nitrogen to undergo a nucleophilic attack at the nearby β-carbon of the porphyrin π-cation radical with a computed free energy barrier of >20 kcal mol-1 which was supplied in the form of reflux condition to initiate such a rearrangement process. UV-vis, EPR and ESI-MS spectroscopies were used to monitor the rearrangement process in situ in order to identify the key reactive intermediates leading to such an unusual transformation.
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Affiliation(s)
- Syed Jehanger Shah
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Younis Ahmad Pandit
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Eugenio Garribba
- Dipartimento di Medicina, Chirurgia e Farmacia, Università di Sassari, Viale San Pietro, 07100, Sassari, Italy
| | - Masatoshi Ishida
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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2
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Silber V, Jean M, Vanthuyne N, Del Rio N, Matozzo P, Crassous J, Ruppert R. Porphyrin- and Bodipy-helicene conjugates: syntheses, separation of enantiomers and chiroptical properties. Org Biomol Chem 2023; 21:8924-8935. [PMID: 37909260 DOI: 10.1039/d3ob01459b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
The synthesis of several new compounds containing a chromophore and a helicenic moiety is reported. The preparation, characterisation and some physico-chemical studies are detailed. In particular, the two enantiomers of several chiral molecules of this type were separated by chiral HPLC (both analytically and in a preparative way) and their racemisation rates were determined for short-lived species. Electronic circular dichroism (ECD) and circular polarised luminescence (CPL) measurements were performed for the compounds with a very long racemisation half-life. Chiral porphyrins and Bodipys both gave ECD and CPL responses over a large area of the visible spectrum.
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Affiliation(s)
- Vincent Silber
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France.
| | - Marion Jean
- Aix-Marseille Université, UMR CNRS 7313, Centrale Marseille, iSm2, 13397 Marseille cedex 20, France
| | - Nicolas Vanthuyne
- Aix-Marseille Université, UMR CNRS 7313, Centrale Marseille, iSm2, 13397 Marseille cedex 20, France
| | - Natalia Del Rio
- ISCR, UMR CNRS 6226, campus de Beaulieu, Université de Rennes, 35042 Rennes cedex, France.
| | - Paola Matozzo
- ISCR, UMR CNRS 6226, campus de Beaulieu, Université de Rennes, 35042 Rennes cedex, France.
| | - Jeanne Crassous
- ISCR, UMR CNRS 6226, campus de Beaulieu, Université de Rennes, 35042 Rennes cedex, France.
| | - Romain Ruppert
- Institut de Chimie, UMR CNRS 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France.
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3
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Cooper C, Paul R, Alsaleh A, Washburn S, Rackers W, Kumar S, Nesterov VN, D'Souza F, Vinogradov SA, Wang H. Naphthodithiophene-Fused Porphyrins: Synthesis, Characterization, and Impact of Extended Conjugation on Aromaticity. Chemistry 2023; 29:e202302013. [PMID: 37467466 DOI: 10.1002/chem.202302013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/21/2023]
Abstract
The fusion of tetrapyrroles with aromatic heterocycles constitutes a useful tool for manipulating their opto-electronic properties. In this work, the synthesis of naphthodithiophene-fused porphyrins was achieved through a Heck reaction-based cascade of steps followed by the Scholl reaction. The naphthodithiophene-fused porphyrins display a unique set of optical and electronic properties. Fusion of the naphtho[2,1-b:3,4-b']dithiophene to porphyrin (F2VTP) leads to a ~20% increase in the fluorescence lifetime, which is accompanied, unexpectedly, by a more than two-fold drop in the emission quantum yield (ϕ=0.018). In contrast, fusion of the isomeric naphtho[1,2-b:4,3-b']dithiophene to porphyrin (F3VPT) results in a ~1.5-fold increase in the fluorescence quantum yield (ϕ=0.13) with a concomitant ~30 % increase in the fluorescence lifetime. This behavior suggests that fusion of the porphyrin with the naphthodithiopheno-system mainly affects the radiative rate constant in the Q-state deactivation pathway, where the effects of the isomeric naphtho[2,1-b:3,4-b']dithiophene- versus naphtho[1,2-b:4,3-b']dithiophene-fusion are essentially the opposite. Interestingly, nucleus-independent chemical shifts analysis revealed a considerable difference between the aromaticities of these two isomeric systems. Our results demonstrate that subtle structural differences in the fused components of the porphyrin can be reflected in rather significant differences between the photophysical properties of the resulting systems.
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Affiliation(s)
- Courtney Cooper
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Ros Paul
- Department of Biochemistry and Biophysics, Perelman School of Medicine and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ajyal Alsaleh
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Spenser Washburn
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - William Rackers
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Siddhartha Kumar
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | | | - Francis D'Souza
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
| | - Sergei A Vinogradov
- Department of Biochemistry and Biophysics, Perelman School of Medicine and Department of Chemistry, School of Arts and Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hong Wang
- Department of Chemistry, University of North Texas, Denton, TX 76203, USA
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4
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Lv X, Morimoto H, Liu N, Kuzuhara D, Aratani N, Yamada H, Qiu F, Xue S. Bent Dithienoporphyrin(2.1.2.1): Synthesis, Structure, Optical and Electronic Properties, and Metal Complexation. J Org Chem 2023. [DOI: 10.1021/acs.joc.2c02520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Affiliation(s)
- Xiaojuan Lv
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hirofumi Morimoto
- Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Ningchao Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Daiki Kuzuhara
- Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka 020-8551, Japan
| | - Naoki Aratani
- Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Hiroko Yamada
- Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Fengxian Qiu
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Songlin Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
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Higashino T, Iizumi R, Imahori H. Rational Synthesis of Benzoheterole-fused Porphyrins and π-System Switching by Central Metal Ion. CHEM LETT 2022. [DOI: 10.1246/cl.220277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiro Higashino
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Rikiya Iizumi
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroshi Imahori
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Silber V, Gruber N, Jean M, Vanthuyne N, Ruppert R. Synthesis of a helicene-fused porphyrin leading to a π-extended chiral chromophore. Chem Commun (Camb) 2022; 58:6012-6015. [PMID: 35485612 DOI: 10.1039/d2cc01475k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation of several covalently linked [6]-helicene-porphyrins is reported. A fused [6]-helicene-porphyrin π-extended aromatic system was isolated, the enantiomers separated and the chiroptical properties determined. The oxidative cyclodehydrogenation proved to be very effective for six-membered fused helical systems, but not suited for the formation of five-membered fused systems.
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Affiliation(s)
- Vincent Silber
- Institut de Chimie, UMR CNRS 7177, Institut Le Bel, Université de Strasbourg, 4 rue Blaise Pascal, 67000, Strasbourg, France.
| | - Nathalie Gruber
- Fédération de Chimie Le Bel, FR 2010, BP 296R8, 1 rue Blaise Pascal, 67008, Strasbourg Cedex, France
| | - Marion Jean
- Aix Marseille Univ, UMR CNRS 7313, Centrale Marseille, iSm2, 13397, Marseille cedex 20, France
| | - Nicolas Vanthuyne
- Aix Marseille Univ, UMR CNRS 7313, Centrale Marseille, iSm2, 13397, Marseille cedex 20, France
| | - Romain Ruppert
- Institut de Chimie, UMR CNRS 7177, Institut Le Bel, Université de Strasbourg, 4 rue Blaise Pascal, 67000, Strasbourg, France.
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