1
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Song Y, Zhu J. Spin population determines whether antiaromaticity can increase or decrease radical stability. Phys Chem Chem Phys 2024; 26:21213-21221. [PMID: 39073087 DOI: 10.1039/d4cp01031k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
Aromaticity, as a classical and fundamental concept in chemistry, can enhance thermodynamic stability. In sharp contrast, a previous study showed that antiaromaticity rather than aromaticity can enhance the radical stability of α-methyl heterocyclic compounds. Here, we demonstrate a similar antiaromaticity-promoted radical stability when the methyl group is replaced by five-membered (alkyl)(amino)cyclics (AACs). More interestingly, when an AAC is fused with an antiaromatic ring, the radical stability could be either reduced or enhanced, depending on the spin population. Specifically, when the spin density is populated on an incoming antiaromatic 1,4-dihydro-1,4-diborinine moiety, the radical stability is enhanced whereas when the spin density is maintained on the original five-membered ring, the radical stability is reduced. Our findings highlight the importance of spin density in tuning the radical stability, inviting experimental chemists' verification.
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Affiliation(s)
- Yanlin Song
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jun Zhu
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, 518172, People's Republic of China.
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2
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Xu Y, Zhu B, Zhang L, Baryshnikov G, Sha F, Nishimoto E, Takano H, Li C, Wu X, Ågren H, Shinokubo H, Xie Y, Li Q. Syntheses of Thiophene-Thiophene-Linked Corrorin Dimers with Tunable Near-Infrared Absorption and Distinctive Reactivity. Org Lett 2024. [PMID: 38190656 DOI: 10.1021/acs.orglett.3c04323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Thiahexaphyrinone 1 and thia-dipyrrin-appended corrorin 2 have been synthesized. Surprisingly, further oxidation of compound 2 with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in dichloromethane afforded dimer 3 with two molecules of compound 2 linked at the α-carbon atoms of the thienyl units. Treatment of compound 3 with DDQ in MeOH and SnCl2 in tetrahydrofuran/H2O afforded the dimethoxy-attached dimer 4 and hydrogenated dihydroxy-attached dimer 5, respectively. These results provide the first examples for synthesizing thiophene-linked porphyrinoid dimers with tunable near-infrared absorption and chirality.
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Affiliation(s)
- Yue Xu
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Bin Zhu
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Lingfang Zhang
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Glib Baryshnikov
- Department of Science and Technology, Laboratory of Organic Electronics, Linköping University, SE-601 74 Norrköping, Sweden
| | - Feng Sha
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Emiko Nishimoto
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Hideaki Takano
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Chengjie Li
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Xinyan Wu
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Hans Ågren
- Department of Physics and Astronomy, Uppsala University, SE-751 20 Uppsala, Sweden
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Yongshu Xie
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
| | - Qizhao Li
- Key Laboratory for Advanced Materials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
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3
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Di Zazzo L, Nardis S, Caroleo F, Pizzoli F, Fronczek FR, Smith KM, Berna BB, Paolesse R. 5- and 10-oxocorroles from β-octaalkylcorroles. Chem Commun (Camb) 2023; 60:102-105. [PMID: 38019678 DOI: 10.1039/d3cc05204d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
The reaction of Zn ions with β-octaalkylcorroles leads to the air oxidation of the macrocycle, with the formation of a mixture of 5- and 10-oxocorroles. Spectroscopic characterization confirms the antiaromatic character of these macrocycles. A simple synthetic protocol opens the way for more detailed studies of oxocorrole chemistry.
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Affiliation(s)
- Lorena Di Zazzo
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy.
| | - Sara Nardis
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy.
| | - Fabrizio Caroleo
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy.
| | - Francesco Pizzoli
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy.
| | - Frank R Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Kevin M Smith
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Beatrice Berionni Berna
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Roberto Paolesse
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Rome 00133, Italy.
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4
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Bhattacharya S, Nevonen DE, Auty AJ, Graf A, Appleby M, Chaudhri N, Chekulaev D, Brückner C, Chauvet AAP, Nemykin VN. Photophysical Exploration of Two Isomers of Octaethyltrioxopyrrocorphin. J Phys Chem A 2023; 127:7694-7706. [PMID: 37690121 DOI: 10.1021/acs.jpca.3c03184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
The introduction of three β-oxosubstituents to octaethylporphyrin by means of an oxidation/rearrangement reaction generates the trioxopyrrocorphin chromophore. Pyrrocorphins (hexahydroporphyrins) are generally nonaromatic, but we recently demonstrated trioxopyrrocorphins to possess considerable aromatic character. This contribution explores the photophysical characteristics of these unusual chromophores. In agreement with density functional theory modeling, the UV-vis and magnetic circular dichroism spectra of the two─out of the four possible─triketone regioisomers investigated conform to the Gouterman model of porphyrinoid optical spectra, in alignment with their aromaticity. Their excited-state dynamics shed further light on the degree to which β-oxo substitutions tune the photophysical properties of porphyrinoids. Introduction of β-oxo functionalities increases the rate and yield of intersystem crossing and shortens the triplet state lifetime. Unexpectedly, the singlet oxygen generation yield of both pyrrocorphins remains relatively high, with modes of distortion from planarity likely enhancing triplet energy transfer. This work thus expands our understanding of a rare class of porphyrinoids and further characterizes them as sustaining aromatic porphyrinic π-systems. Our findings suggest triple β-oxo substitution as a viable route toward the development of novel, high-singlet oxygen yield porphyrinic photosensitizers.
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Affiliation(s)
- Sayantan Bhattacharya
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Dustin E Nevonen
- Department of Chemistry, University of Tennessee, 1420 Circle Dr., Knoxville, Tennessee 37996-1600, United States
| | - Alexander J Auty
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Arthur Graf
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Martin Appleby
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Nivedita Chaudhri
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Dimitri Chekulaev
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Christian Brückner
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Adrien A P Chauvet
- Department of Chemistry, University of Sheffield, Dainton Building, Sheffield S3 7HF, U.K
| | - Victor N Nemykin
- Department of Chemistry, University of Tennessee, 1420 Circle Dr., Knoxville, Tennessee 37996-1600, United States
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5
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Imagawa T, Okazawa K, Yoshizawa K, Yoshida H, Shang R, Yamamoto Y, Nakamoto M. Complexation-Triggered Fluctuation of π-Conjugation on an Antiaromatic Dicyanoanthracene Dianion. Chemistry 2023:e202302550. [PMID: 37643995 DOI: 10.1002/chem.202302550] [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: 08/06/2023] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 08/31/2023]
Abstract
The formation of Lewis pairs is an important chemical concept. Recently, the complexation of Lewis acidic tris(pentafluorophenyl)borane with Lewis basic moieties and subsequent reduction has emerged as a fascinating strategy for designing novel reactions and structures. The impact of the complexation and subsequent reduction of antiaromatic systems bearing Lewis base moieties has been investigated. We found how Lewis adduct formation stabilizes an antiaromatic system consisting of 9,10-dicyanoanthracene and tris(pentafluorophenyl)borane by using synthesis, X-ray crystallography, spectroscopic analysis, and quantum chemical calculations.
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Affiliation(s)
- Taiki Imagawa
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Kazuki Okazawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering and IRCCS, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Hiroto Yoshida
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Rong Shang
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Yohsuke Yamamoto
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
| | - Masaaki Nakamoto
- Department of Chemistry, Graduate School of Advanced Engineering and Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi, Hiroshima, 739-8526, Japan
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6
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Lv X, Gao H, Wu F, Liu N, Ueno S, Yang X, Zhang T, Aratani N, Yamada H, Qiu F, Shen Z, Xue S. Highly Robust and Antiaromatic Rhenium(I) Rosarin. Inorg Chem 2023; 62:4747-4751. [PMID: 36920034 DOI: 10.1021/acs.inorgchem.3c00061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
1ReH•Cl, a highly robust and antiaromatic rhenium(I) complex of triarylrosarin, is synthesized. The 1H NMR spectrum of 1ReH•Cl shows upfield-shifted pyrrole protons and highly downfield-shifted inner protons that confirm its antiaromatic nature, with density functional theory calculations strongly supporting this interpretation. Antiaromatic 1ReH•Cl absorbs from the UV to near-IR region of the optical spectrum; cyclic voltammetry, thin-layer UV-vis spectroelectrochemistry, and spin-density distributions clearly reveal that the rosarin backbone of 1ReH•Cl undergoes redox chemistry. The X-ray structure of 1ReH•Cl shows a fully coordinated and protonated inner cavity that effectively prevents proton-coupled electron transfer when treated with an acid. A remarkably negative NICS(0) value, clockwise anisotropy of the induced current density ring current, and the aromatic shielded inner cavity in the 2D ICSS(0) map reveal that the T1 state of 1ReH•Cl is aromatic based on Baird's rule.
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Affiliation(s)
- Xiaojuan Lv
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Hu Gao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Fan Wu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Ningchao Liu
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - So Ueno
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Xiaoliang Yang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Tao Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Naoki Aratani
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Hiroko Yamada
- Division of Materials Science, Nara Institute of Science and Technology (NAIST), 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
| | - Zhen Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Songlin Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
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7
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Deng W, Liu Y, Shimizu D, Tanaka T, Nakai A, Rao Y, Xu L, Zhou M, Osuka A, Song J. Facile Formation of Stable Neutral Radicals and Cations from [22]Smaragdyrin BF 2 Complexes. Chemistry 2023; 29:e202203484. [PMID: 36422469 DOI: 10.1002/chem.202203484] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 11/25/2022]
Abstract
meso-Trimesityl-substituted [20]smaragdyrin freebase was synthesized by p-toluenesulfonic acid catalyzed reaction of 5-mesityldipyrromethane and 2,14-dibromodipyrrin in an improved yield of 63 %. Unexpectedly, treatment of the [20]smaragdyrin freebase with BF3 ⋅ OEt2 and triethylamine (TEA) gave a stable radical species, in which the BF2 unit is coordinated at the tripyrrin site, probably by ready release of a hydrogen atom of a [22]smaragdyrin BF2 complex. Similar treatment of [22]smaragdyrin free base produced another [22]smaragdyrin BF2 complex, in which the BF2 unit is coordinated at the dipyrrin site. The tripyrrin site coordinated neutral radical was oxidized with AgSbF6 to give a stable antiaromatic cation; this was reduced with NaBH4 to its 22π congener, which was easily oxidized back to the neutral radical in the air and rearranged to thermodynamically stable dipyrrin site coordinated [22]smaragdyrin BF2 complex upon treatment with BF3 ⋅ OEt2 and TEA. Further, the dipyrrin site coordinated [22]smaragdyrin BF2 complex was similarly oxidized to a stable neutral radical and a stable cation in a stepwise manner. This work demonstrates a rare ability of smaragdyrin BF2 complexes to exist in multiple redox states, particularly forming a stable neutral radical by facile release of a hydrogen atom.
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Affiliation(s)
- Weikang Deng
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Yang Liu
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Daiki Shimizu
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takayuki Tanaka
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Akito Nakai
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yutao Rao
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Ling Xu
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Mingbo Zhou
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Atsuhiro Osuka
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
| | - Jianxin Song
- Key Laboratory of Chemical Biology and, Traditional Chinese Medicine Research (Ministry of Education of China), Key Laboratory of the Assembly and Application of, Organic Functional molecules of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha, 410081, P. R. China
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8
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Kumar A, Kim D, Kumar S, Mahammed A, Churchill DG, Gross Z. Milestones in corrole chemistry: historical ligand syntheses and post-functionalization. Chem Soc Rev 2023; 52:573-600. [PMID: 36537842 DOI: 10.1039/d1cs01137e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Corroles are synthetic porphyrin analogs that contain one meso carbon atom lesser and bear a trianionic N4 metal-chelating core. They require in-depth preparative chemistry, demonstrate unique coordination chemistry and have impressive and diverse physical properties, and these are commonly compared to their respective porphyrins. The corrole's macrocyclic system is inherently electron rich and chelates metal ions in a more compact, less symmetric tetranitrogen cavity compared to that of porphyrins. Herein, we cover the highlights of the corrole research through the decades by first reviewing, in a chronological sense, multi-step syntheses; some routes have since been discontinued. This is followed by describing post-functionalization of already formed corroles via reactions performed on either the macrocycle's periphery or the inner nitrogen atoms or on the existing substituents. We do also mention milestones in literature reviewing, publication of encyclopedias, and the creation of professional organizations and conferences (ICPP) which make up the corrole/porphyrin research landscape. Also highlighted are still existing challenges and future perspectives.
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Affiliation(s)
- Anil Kumar
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel. .,Department of Applied Chemistry, Delhi Technological University, Delhi 110042, India
| | - Donghyeon Kim
- Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
| | - Sachin Kumar
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel.
| | - Atif Mahammed
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel.
| | - David G Churchill
- Department of Chemistry, Molecular Logic Gate Laboratory, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea. .,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Republic of Korea
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel.
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9
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Passadis S, Hadjithoma S, Fairbairn NJ, Hedley GJ, Bandeira NAG, Tsipis AC, Miras HN, Keramidas AD, Kabanos TA. Hafnium(IV) Chemistry with Imide-Dioxime and Catecholate-Oxime Ligands: Unique {Hf 5} and Metalloaromatic {Hf 6}-Oxo Clusters Exhibiting Fluorescence. Inorg Chem 2022; 61:20253-20267. [PMID: 36461927 PMCID: PMC9768755 DOI: 10.1021/acs.inorgchem.2c01768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Hafnium(IV) molecular species have gained increasing attention due to their numerous applications ranging from high-resolution nanolithography, heterogeneous catalysis, and electronics to the design of molecule-based building blocks in metal-organic frameworks (MOFs), with applications in gas separation, sorption, luminescence sensing, and interim storage of radioactive waste. Despite great potential, their chemistry is relatively underdeveloped. Here, we use strong chelators (2Z-6Z)-piperidine-2,6-dione (H3pidiox) and 2,3-dihydroxybenzaldehyde oxime (H3dihybo) to synthesize the first ever reported pentanuclear {Hf5/H3pidiox} and hexanuclear {Hf6/H3dihybo} clusters (HfOCs). The {Hf6} clusters adopt unique core structures [Hf6IV(μ3-O)2(μ-O)3] with a trigonal-prismatic arrangement of the six hafnium atoms and have been characterized via single-crystal X-ray diffraction analysis, UV-vis spectroscopy in the solid state, NMR, fluorescence spectroscopy, and high-resolution mass spectrometry in solution. One-dimensional (1D) and two-dimensional (2D) 1H NMR and mass spectroscopies reveal the exceptional thermodynamic stability of the HfOCs in solution. Interestingly, the conjunction of the oxime group with the catechol resulted in the remarkable reduction of the clusters' band gap, below 2.51 eV. Another prominent feature is the occurrence of pronounced metalloaromaticity of the triangular {Hf3} metallic component revealed by its NICSzz scan curve calculated by means of density functional theory (DFT). The NICSzz(1) value of -44.6 ppm is considerably higher than the -29.7 ppm found at the same level of theory for the benzene ring. Finally, we investigated the luminescence properties of the clusters where 1 emits light in the violet region despite the lack of fluorescence of the free H3pidiox ligand, whereas the {Hf6} 3 shifts the violet-emitting light of the H3dihybo to lower energy. DFT calculations show that this fluorescence behavior stems from ligand-centered molecular orbital transitions and that HfIV coordination has a modulating effect on the photophysics of these HfOCs. This work not only represents a significant milestone in the construction of stable low-band-gap multinuclear HfIV clusters with unique structural features and metal-centered aromaticity but also reveals the potential of Hf(IV) molecule-based materials with applications in sensing, catalysis, and electronic devices.
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Affiliation(s)
- Stamatis
S. Passadis
- Section
of Inorganic and Analytical Chemistry, University
of Ioannina, Ioannina45110, Greece
| | - Sofia Hadjithoma
- Department
of Chemistry, University of Cyprus, Nicosia1678, Cyprus
| | | | - Gordon J. Hedley
- WestCHEM,
School of Chemistry, University of Glasgow, GlasgowG12 8QQ, U.K.
| | - Nuno A. G. Bandeira
- BioISI—BioSystems
and Integrative Sciences Institute, Faculdade
de Ciências da Universidade de Lisboa, Campo Grande, 1749-016Lisboa, Portugal,
| | - Athanassios C. Tsipis
- Section
of Inorganic and Analytical Chemistry, University
of Ioannina, Ioannina45110, Greece,
| | - Haralampos N. Miras
- WestCHEM,
School of Chemistry, University of Glasgow, GlasgowG12 8QQ, U.K.,
| | | | - Themistoklis A. Kabanos
- Section
of Inorganic and Analytical Chemistry, University
of Ioannina, Ioannina45110, Greece,
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10
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Protonation‐Induced Antiaromaticity in Octaaza[8]circulenes: Cyclooctatetraene Scaffolds Constrained with Four Amidine Moieties. Chem Asian J 2022; 17:e202200244. [DOI: 10.1002/asia.202200244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/04/2022] [Indexed: 11/07/2022]
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11
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Zhang Z, Wen B, Rao Y, Xu L, Osuka A, Song J. Meso‐Monoaryl‐Substituted Neo‐confused Calixsmaragdyrins and Meso‐monoaryl Substituted Smaragdyrins: Synthesis, Structures and Properties. ChemistrySelect 2022. [DOI: 10.1002/slct.202200619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zheng Zhang
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
| | - Bin Wen
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
| | - Yutao Rao
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
| | - Ling Xu
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
| | - Atsuhiro Osuka
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
| | - Jianxin Song
- College of Chemistry and Chemical Engineering Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China) Key Laboratory of Application and Assemble of Organic Functional Molecules Hunan Normal University Changsha 410081 China
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12
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Chen QC, Fite S, Fridman N, Tumanskii B, Mahammed A, Gross Z. Hydrogen Evolution Catalyzed by Corrole-Chelated Nickel Complexes, Characterized in all Catalysis-Relevant Oxidation States. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05243] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qiu-Cheng Chen
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
| | - Shachar Fite
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
| | - Boris Tumanskii
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
| | - Atif Mahammed
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion−Israel Institute of Technology, Haifa 32000, Israel
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13
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Gao H, Wu F, Zhao Y, Zhi X, Sun Y, Shen Z. Highly Stable Neutral Corrole Radical: Amphoteric Aromatic-Antiaromatic Switching and Efficient Photothermal Conversion. J Am Chem Soc 2022; 144:3458-3467. [PMID: 35170957 DOI: 10.1021/jacs.1c11716] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The preparation of novel stable radical systems that survive and may be manipulated under harsh conditions is essential for their practical applications, such as energy storage and conversion materials. Here, we present a facile synthesis of an electrically neutral benzo-fused nickel corrole radical that shows remarkable photo- and thermal stability. The carbon-based organic radical character was confirmed using electron spin resonance and spin population analyses. This radical may be reversibly converted to its aromatic or antiaromatic ion via a one-electron redox process, as indicated by nuclear magnetic resonance chemical shifts and theoretical calculations. Notably, the antiaromatic state is stable, showing intense ring currents with complex pathways. The spectroscopic characteristics and calculated molecular orbitals of the corrole radical exhibit a combination of aromatic and antiaromatic features. On the basis of the aromatic light-harvesting property and antiaromatic emission-free character, the corrole radical exhibits highly robust, efficient photothermal energy conversion in water after encapsulation within nanoparticles, with the unpaired spin simultaneously retained. These results provide a fundamental understanding of the relationship between the (anti)aromaticity and photophysical properties of a porphyrinoid radical and a promising platform for the design of radical-based functional materials.
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Affiliation(s)
- Hu Gao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Fan Wu
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yue Zhao
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xu Zhi
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yufen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zhen Shen
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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14
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Takase M, Ueno A, Oki K, Matsumoto H, Mori S, Okujima T, Uno H. Tropo(thio)ne-Embedded HomoHPHACs: Does the Tropylium Cation Induce Global Antiaromaticity in Expanded Hexapyrrolohexaazacoronene? Chem Commun (Camb) 2022; 58:3366-3369. [DOI: 10.1039/d1cc07152a] [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
Tropo(thio)ne-embedded homoHPHACs and their dications were synthesised by an electrophilic annulation of secoHPHAC and successive oxidation. 13C NMR spectra of the dications represented global 22π homoaromaticity via homoconjugation, while alkylation...
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15
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Nakai A, Kim J, Tanaka T, Kim D, Osuka A. Tetrabromo[36]octaphyrin: A Promising Precursor of Directly Fused Porphyrin(2.1.1.1) Dimer and
meso‐α
Fused N‐Confused Porphyrin Dimer. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202112023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Akito Nakai
- Department of Chemistry Graduate School of Science Kyoto University, Sakyo-ku Kyoto 606-8502 Japan
| | - Jinseok Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry Yonsei University Seoul 120-749 Korea
| | - Takayuki Tanaka
- Department of Chemistry Graduate School of Science Kyoto University, Sakyo-ku Kyoto 606-8502 Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry Yonsei University Seoul 120-749 Korea
| | - Atsuhiro Osuka
- Department of Chemistry Graduate School of Science Kyoto University, Sakyo-ku Kyoto 606-8502 Japan
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16
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Nakai A, Kim J, Tanaka T, Kim D, Osuka A. Tetrabromo[36]octaphyrin: A Promising Precursor of Directly Fused Porphyrin(2.1.1.1) Dimer and meso-α Fused N-Confused Porphyrin Dimer. Angew Chem Int Ed Engl 2021; 60:26540-26544. [PMID: 34609777 DOI: 10.1002/anie.202112023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/23/2021] [Indexed: 11/09/2022]
Abstract
3,7,23,27-Tetrabromo[36]octaphyrin 2 was synthesized as a novel octaphyrin bearing two meso-free positions. Surprisingly, its ZnII and NiII complexation reactions produced a directly fused porphyrin(2.1.1.1) dimer 6, and a meso-α fused N-confused porphyrin (NCP) dimer 7, as the first example of NCP tape, respectively, via transannular C-C bond formation. While 6 exhibits a diatropic ring-current effect owing to the global 36π Möbius aromaticity, 7 shows a paratropic ring-current effect due to the global Hückel 36π antiaromaticity. In addition, the oxidation of 7 with PbO2 allowed for formation of its two-electron oxidized species 9 that exhibited a diatropic ring-current effect due to the global Hückel 34π aromaticity. This work has demonstrated that meso-free large expanded porphyrins can be a promising platform to produce novel fused porphyrinoids.
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Affiliation(s)
- Akito Nakai
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Jinseok Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 120-749, Korea
| | - Takayuki Tanaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 120-749, Korea
| | - Atsuhiro Osuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
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17
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Tanaka T, Ueto K, Osuka A. Development of Peripheral Functionalization Chemistry of meso-Free Corroles. Chemistry 2021; 27:15605-15615. [PMID: 34363279 DOI: 10.1002/chem.202102267] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Indexed: 11/06/2022]
Abstract
In contrast to the extensive development of meso functionalization of porphyrins, that of corroles has been only rarely explored until the development of practical synthetic methods of meso -free corroles in 2015. Ready availability of meso -free corroles opened up meso -functionalization chemistry of corroles, giving rise to successful synthesis of various meso-substituted corroles such as meso -halogen, meso -nitro, meso -amino, meso -oxo, and meso iminocorroles as well as meso-meso linked corrole dimers and corrole tapes. In some cases, 2NH corroles existed as stable or transient radical species. The impacts of meso -functionalization on the structures, electronic properties, optical characteristics, and aromaticity are highlighted in this Minireview.
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Affiliation(s)
- Takayuki Tanaka
- Kyoto University, Graduate School of Science, Department of Chemistry, JAPAN
| | - Kento Ueto
- Kyoto University, Graduate School of Science, Department of Chemistry, JAPAN
| | - Atsuhiro Osuka
- Kyoto University, Graduate School of Science, Department of Chemistry, Kita-shirakawa Oiwake-cho, Sakyo-ku, 606-8502, Kyoto, JAPAN
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18
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Ueta K, Nakai A, Tanaka T, Osuka A. Synthesis of 8,12-Dibromocorrole and Its Transformation to Antiaromatic 8,10-Fused Iminoisocorrole with a Polarized Resonance Contribution. Chem Asian J 2021; 16:2253-2256. [PMID: 34124860 DOI: 10.1002/asia.202100577] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/11/2021] [Indexed: 11/10/2022]
Abstract
8,12-Dibromo-5,15-bis(pentafluorophenyl)corrole and its Ag(III) complex were prepared via intramolecular oxidative coupling of a 8,12-dibromobilane precursor. The Ag(III) complex was allowed for further transformation via Suzuki coupling reaction. Thus, 2-aminophenyl group was coupled at one of the β-positions, and subsequent demetalation followed by oxidation with MnO2 afforded 8,10-fused iminoisocorrole in good yields. The iminoisocorrole exhibited weak antiaromaticity due to the C(+)-N(-) polarized resonance contribution as evidenced by 1 H NMR spectrum, UV/vis absorption spectra, cyclic voltammetry, and theoretical calculations.
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Affiliation(s)
- Kento Ueta
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Akito Nakai
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Takayuki Tanaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Atsuhiro Osuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
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