1
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Zheng X, Bu Y. Hydrogen-Bonding-Assisted Substituent Engineering for Modulating Magnetic Spin Couplings and Switching in m-Phenylene Nitroxide Diradicals. J Phys Chem A 2023; 127:7443-7451. [PMID: 37658809 DOI: 10.1021/acs.jpca.3c03265] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Rational modification of the coupler for the theoretical design of molecular magnets has attracted extensive interest. Substituent insertion is a widely used strategy for adjusting molecular properties, but its effect and modulation on magnetic spin couplings have been less investigated. In this work, we predict the magnetic properties of the design m-phenylene nitroxide (NO) diradicals regulated by introducing substituents. The calculated results for those two pairs of diradicals indicate that the signs of their magnetic coupling constants J do not change, but the magnitudes remarkably change after substituent regulation in the range from 253 to 730 cm-1. Such noticeable magnetic changes induced by introducing subsituents are mainly attributed to different electronic effects of substituents, assisted by the proximity of two NO groups, good planarity, conjugation, and an intramolecular hydrogen bond. In particular, the insertion of intramolecular H-bonds not only indicates an electronic effect but also has greatly changed the spin density distribution. Further aromaticity of the coupler ring, spin densities, and molecular orbitals and energetics was evaluated to gain a better understanding of magnetic regulation. Interestingly, further protonation of some substituents (e.g., -NO2 and -CO2) can noticeably turn the spin coupling from ferromagnetic to antiferromagnetic, showing manipulable magnetic switching. This work provides a promising strategy based on substituent engineering for magnetic spin coupling modulation, not only turning the coupling magnitude but also enabling the magnetic switching, thus providing insights into molecular magnetic manipulation for spintronics applications.
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Affiliation(s)
- Xiangyun Zheng
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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2
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Malik R, Bu Y. Magnetic coupling modulation in meta-nitroxide-functionalized isoalloxazine magnets with redox-active units as efficient side-modulators. Phys Chem Chem Phys 2023. [PMID: 37335558 DOI: 10.1039/d3cp01611k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Magnetic conversion can be accomplished in a variety of ways, as organic molecules with switchable magnetic characteristics offer numerous technological applications. It is crucial to find magnetism-switchable systems because, in the field of organic magnetic materials, the redox-induced magnetic reversal is very simple to achieve and shows significant applications. Herein, we computationally design isoalloxazine-based diradicals through oxidizing N10 and adding a nitroxide to C8 as the spin source (i.e. 8-nitroxide-isoalloxazine 10-oxide, an m-phenylene-like nitroxide diradical expanded with a redox unit as a side-modulator) and its N1/N5-hydrogenated/protonated diradical derivatives and introducing substituents (-OH, -NH2, and -NO2) to C6. We demonstrate that the basically modified structure exhibits ferromagnetic (FM) characteristics with a magnetic coupling constant (J) of 561.3 cm-1 calculated at the B3LYP/6-311+G(d,p) level, obeying the meta-phenylene-mediated diradical character, and dihydrogenation can lead to an AFM diradical with considerably large J (-976.1 cm-1). Surprisingly, protonation at N1 or N5 can lead to distinctly different magnetic variations (561.3 → -1602.9 cm-1 at N1 versus 561.3 → 379.1 cm-1 at N5). Analyses indicate that small singlet-triplet energy gaps and small energy gaps between the highest occupied and lowest unoccupied molecular orbitals (HOMO, LUMO) of the closed shell singlet state are the key features of these isoalloxazine diradicals, and aromaticity variations, significant spin delocalization from the π-conjugated structure and spin polarization from the non-Kekule structure induced by modification are responsible for the magnetic conversion. Furthermore, the spin alternation rule, the singly occupied molecular orbital (SOMO) effect, and the SOMO-SOMO energy splitting of the triplet state are used to analyze these distinct variations. This work provides a novel understanding of the structures and characteristics of modified isoalloxazine diradicals, as well as essential details for the intricate design and characterization of new isoalloxazine-based potential organic magnetic switches.
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Affiliation(s)
- Rabia Malik
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
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3
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Quantum nanomagnets in on-surface metal-free porphyrin chains. Nat Chem 2023; 15:53-60. [PMID: 36280765 DOI: 10.1038/s41557-022-01061-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/09/2022] [Indexed: 01/14/2023]
Abstract
Unlike classic spins, quantum magnets are spin systems that interact via the exchange interaction and exhibit collective quantum behaviours, such as fractional excitations. Molecular magnetism often stems from d/f-transition metals, but their spin-orbit coupling and crystal field induce a significant magnetic anisotropy, breaking the rotation symmetry of quantum spins. Thus, it is of great importance to build quantum nanomagnets in metal-free systems. Here we have synthesized individual quantum nanomagnets based on metal-free multi-porphyrin systems. Covalent chains of two to five porphyrins were first prepared on Au(111) under ultrahigh vacuum, and hydrogen atoms were then removed from selected carbons using the tip of a scanning tunnelling microscope. The conversion of specific porphyrin units to their radical or biradical state enabled the tuning of intra- and inter-porphyrin magnetic coupling. Characterization of the collective magnetic properties of the resulting chains showed that the constructed S = 1/2 antiferromagnets display a gapped excitation, whereas the S = 1 antiferromagnets exhibit distinct end states between even- and odd-numbered spin chains, consistent with Heisenberg model calculations.
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4
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Sun Q, Mateo LM, Robles R, Ruffieux P, Bottari G, Torres T, Fasel R, Lorente N. Magnetic Interplay between π-Electrons of Open-Shell Porphyrins and d-Electrons of Their Central Transition Metal Ions. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105906. [PMID: 35302718 PMCID: PMC9259720 DOI: 10.1002/advs.202105906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Magnetism is typically associated with d- or f-block elements, but can also appear in organic molecules with unpaired π-electrons. This has considerably boosted the interest in such organic materials with large potential for spintronics and quantum applications. While several materials showing either d/f or π-electron magnetism have been synthesized, the combination of both features within the same structure has only scarcely been reported. Open-shell porphyrins (Pors) incorporating d-block transition metal ions represent an ideal platform for the realization of such architectures. Herein, the preparation of a series of open-shell, π-extended Pors that contain magnetically active metal ions (i.e., CuII , CoII , and FeII ) through a combination of in-solution and on-surface synthesis is reported. A detailed study of the magnetic interplay between π- and d-electrons in these metalloPors has been performed by scanning probe methods and density functional theory calculations. For the Cu and FePors, ferromagnetically coupled π-electrons are determined to be delocalized over the Por edges. For the CoPor, the authors find a Kondo resonance resulting from the singly occupied CoII dz 2 orbital to dominate the magnetic fingerprint. The Fe derivative exhibits the highest magnetization of 3.67 μB (S≈2) and an exchange coupling of 16 meV between the π-electrons and the Fe d-states.
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Affiliation(s)
- Qiang Sun
- nanotech@surfaces LaboratoryEmpa ‐ Swiss Federal Laboratories for Materials Science and TechnologyDübendorf8600Switzerland
- Materials Genome InstituteShanghai UniversityShanghai200444China
| | - Luis M. Mateo
- Departamento de Química OrgánicaUniversidad Autónoma de MadridMadrid28049Spain
- IMDEA‐NanocienciaCampus de CantoblancoMadrid28049Spain
| | - Roberto Robles
- Centro de Física de Materiales CFM/MPC (CSIC‐UPV/EHU)Paseo de Manuel de Lardizabal 5Donostia‐San Sebastián20018Spain
| | - Pascal Ruffieux
- nanotech@surfaces LaboratoryEmpa ‐ Swiss Federal Laboratories for Materials Science and TechnologyDübendorf8600Switzerland
| | - Giovanni Bottari
- Departamento de Química OrgánicaUniversidad Autónoma de MadridMadrid28049Spain
- IMDEA‐NanocienciaCampus de CantoblancoMadrid28049Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem)Universidad Autónoma de MadridMadrid28049Spain
| | - Tomás Torres
- Departamento de Química OrgánicaUniversidad Autónoma de MadridMadrid28049Spain
- IMDEA‐NanocienciaCampus de CantoblancoMadrid28049Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem)Universidad Autónoma de MadridMadrid28049Spain
| | - Roman Fasel
- nanotech@surfaces LaboratoryEmpa ‐ Swiss Federal Laboratories for Materials Science and TechnologyDübendorf8600Switzerland
- Department of ChemistryBiochemistry and Pharmaceutical SciencesUniversity of BernBern3012Switzerland
| | - Nicolás Lorente
- Centro de Física de Materiales CFM/MPC (CSIC‐UPV/EHU)Paseo de Manuel de Lardizabal 5Donostia‐San Sebastián20018Spain
- Donostia International Physics Center (DIPC)Donostia‐San Sebastián20018Spain
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5
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Ishizuka T, Kojima T. Recent Development of π-Expanded Porphyrin Derivatives by Peripheral Ring Fusion. J SYN ORG CHEM JPN 2022. [DOI: 10.5059/yukigoseikyokaishi.80.583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tomoya Ishizuka
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba
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6
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Kumar S, Chaudhri N, Osterloh WR, Kadish KM, Sankar M. Nickel(II) monobenzoporphyrins and chlorins: synthesis, electrochemistry and anion sensing properties. Dalton Trans 2021; 50:17086-17100. [PMID: 34779452 DOI: 10.1039/d1dt03122h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of nickel(II) monobenzochlorins (MBCs) and monobenzoporphyrins (MBPs) containing β-appended or meso,β-fused indanedione (IND) or malononitrile (MN) groups were synthesized and characterized for their physicochemical, electrochemical and anion sensing properties. Each investigated compound contained four meso-phenyl rings and a single β,β'-fused 4,5-di(methoxycarbonyl)benzene ring, with the chlorins represented as NiMBC(Y)2(R)4 and the porphyrins as NiMBP(YF)2, where Y is an indanedione (IND) or malononitrile (MN) group, R = H or Br and YF is a meso,β-fused IND or MN substituent. One of the investigated compounds, NiMBP(IND)2, was structurally characterized and shown to possess a ruffled macrocyclic conformation. The monobenzochlorins, NiMBC(IND)2, NiMBC(IND)2Br4 and NiMBC(MN)2, reversibly respond to basic anions such as CN-, F-, OAc- and H2PO4- through a visible color change assigned to the deprotonation of the vicinal proton on the appended IND or MN substituents. The malononitrile-fused NiII monobenzoporphyrin, NiMBP(MN)2, exhibited a selective but irreversible visual detection of cyanide ions (LOD = 2.23 ppm). This reaction afforded a tri-fused π-extended monobenzoporphyrin product represented as NiMBP(VCN)2 (where VCN = meso,β-fused vinyl cyanide) in non-aqueous media and proceeded via anion induced electron transfer (AIET). The in situ generated π-extended porphyrin was also isolated and characterized as to its physicochemical and electrochemical properties and found to possess a narrow electrochemical HOMO-LUMO gap of 1.46 V along with a near-IR (NIR) absorption band located at 861 nm.
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Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - Nivedita Chaudhri
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - W Ryan Osterloh
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.
| | - Karl M Kadish
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA.
| | - Muniappan Sankar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
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7
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Wang K, Liu P, Zhang F, Xu L, Zhou M, Nakai A, Kato K, Furukawa K, Tanaka T, Osuka A, Song J. A Robust Porphyrin-Stabilized Triplet Carbon Diradical. Angew Chem Int Ed Engl 2021; 60:7002-7006. [PMID: 33393192 DOI: 10.1002/anie.202015356] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/25/2020] [Indexed: 11/06/2022]
Abstract
The synthesis of robust high-spin carbon radicals is an important topic in organic chemistry. Toward this end, several porphyrin-stabilized radicals have been systematically explored. A singly naphthalene-fused porphyrin radical was synthesized by a reaction sequence consisting of a Suzuki-Miyaura coupling of β-borylated porphyrin with 2-bromobenzaldehyde, addition of mesityl Grignard reagent, intramolecular Friedel-Crafts alkylation, and final oxidation with DDQ or tBuOK/O2 . This strategy was also used to synthesize doubly naphthalene-fused porphyrins and syn- and anti-fused-anthracene-bridged porphyrin dimers. While singly naphthalene-fused porphyrin radical has been shown to be a stable monoradical, doubly naphthalene-fused porphyrins and anti-fused-anthracene-bridged porphyrin dimers have been shown to be closed-shell molecules. Finally, the syn-dimer was characterized as a surprisingly stable radical (t1/2 =28 days under ambient air and at 80 °C) that is storable for more than several months, despite its high-spin triplet ground-state carbon diradical.
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Affiliation(s)
- Kaisheng Wang
- College of Chemistry and Chemical Engineering, 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, Hunan Normal University, Changsha, 410081, China
| | - Pingting Liu
- College of Chemistry and Chemical Engineering, 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, Hunan Normal University, Changsha, 410081, China
| | - Fenni 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 the Assembly and Application of Organic Functional molecules of Hunan Province, 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 the Assembly and Application of Organic Functional molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
| | - Mingbo Zhou
- College of Chemistry and Chemical Engineering, 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, Hunan Normal University, Changsha, 410081, China
| | - Akito Nakai
- Department of Chemistry, Graduate School of Science Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Kenichi Kato
- Department of Chemistry, Graduate School of Science Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Ko Furukawa
- Center for Instrumental Analysis, Niigata University, Nishi-ku, Niigata, 950-2181, Japan
| | - Takayuki Tanaka
- Department of Chemistry, Graduate School of Science Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - 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 the Assembly and Application of Organic Functional molecules of Hunan Province, 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 the Assembly and Application of Organic Functional molecules of Hunan Province, Hunan Normal University, Changsha, 410081, China
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8
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Wang K, Liu P, Zhang F, Xu L, Zhou M, Nakai A, Kato K, Furukawa K, Tanaka T, Osuka A, Song J. A Robust Porphyrin‐Stabilized Triplet Carbon Diradical. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015356] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kaisheng Wang
- College of Chemistry and Chemical Engineering 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 Hunan Normal University Changsha 410081 China
| | - Pingting Liu
- College of Chemistry and Chemical Engineering 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 Hunan Normal University Changsha 410081 China
| | - Fenni 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 the Assembly and Application of Organic Functional molecules of Hunan Province 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 the Assembly and Application of Organic Functional molecules of Hunan Province Hunan Normal University Changsha 410081 China
| | - Mingbo Zhou
- College of Chemistry and Chemical Engineering 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 Hunan Normal University Changsha 410081 China
| | - Akito Nakai
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Kenichi Kato
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Ko Furukawa
- Center for Instrumental Analysis Niigata University Nishi-ku Niigata 950-2181 Japan
| | - Takayuki Tanaka
- Department of Chemistry Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - 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 the Assembly and Application of Organic Functional molecules of Hunan Province 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 the Assembly and Application of Organic Functional molecules of Hunan Province Hunan Normal University Changsha 410081 China
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9
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Wang ZY, Dai YZ, Ding L, Dong BW, Jiang SD, Wang JY, Pei J. A Stable Triplet-Ground-State Conjugated Diradical Based on a Diindenopyrazine Skeleton. Angew Chem Int Ed Engl 2021; 60:4594-4598. [PMID: 33241615 DOI: 10.1002/anie.202012989] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/24/2020] [Indexed: 01/24/2023]
Abstract
High-spin conjugated radicals have great potential in magnetic materials and organic spintronics. However, to obtain high-spin conjugated radicals is still quite challenging due to their poor stability. We report the successful synthesis and isolation of a stable triplet conjugated diradical, 10,12-diaryldiindeno[1,2-b:2',1'-e]pyrazine (m-DIP). With the m-xylylene analogue skeleton containing electron-deficient sp2 -nitrogen atoms, m-DIP displays significant aromatic character within its pyrazine ring and its spin density mainly delocalizes on the meta-pyrazine unit, making it a triplet ground state conjugated diradical. Our work provides an effective "spin density tuning" strategy for stable high-spin conjugated radicals.
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Affiliation(s)
- Zi-Yuan Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Ya-Zhong Dai
- Beijing National Laboratory for Molecular Sciences (BNLMS), The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Li Ding
- Beijing National Laboratory for Molecular Sciences (BNLMS), The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Bo-Wei Dong
- Beijing National Laboratory for Molecular Science (BNLMS), Beijing Key Laboratory for Magnetoelectric Materials and Devices, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Shang-Da Jiang
- Beijing National Laboratory for Molecular Science (BNLMS), Beijing Key Laboratory for Magnetoelectric Materials and Devices, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jie-Yu Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jian Pei
- Beijing National Laboratory for Molecular Sciences (BNLMS), The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, Center of Soft Matter Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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10
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Wang Z, Dai Y, Ding L, Dong B, Jiang S, Wang J, Pei J. A Stable Triplet‐Ground‐State Conjugated Diradical Based on a Diindenopyrazine Skeleton. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202012989] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zi‐Yuan Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Center of Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Ya‐Zhong Dai
- Beijing National Laboratory for Molecular Sciences (BNLMS) The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Center of Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Li Ding
- Beijing National Laboratory for Molecular Sciences (BNLMS) The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Center of Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Bo‐Wei Dong
- Beijing National Laboratory for Molecular Science (BNLMS) Beijing Key Laboratory for Magnetoelectric Materials and Devices College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Shang‐Da Jiang
- Beijing National Laboratory for Molecular Science (BNLMS) Beijing Key Laboratory for Magnetoelectric Materials and Devices College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Jie‐Yu Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Center of Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
| | - Jian Pei
- Beijing National Laboratory for Molecular Sciences (BNLMS) The Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Center of Soft Matter Science and Engineering College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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11
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Ershova IV, Piskunov AV, Cherkasov VK. Complexes of diamagnetic cations with radical anion ligands. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4957] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Osterloh WR, Fang Y, Chaudhri N, Cong L, Sankar M, Kadish KM. Effect of fused indanedione (IND) groups and antipodal β-substituents on electrochemical properties of unsymmetrical metalloporphyrins. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s108842462050039x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The interacting effect of fused indanedione (IND) groups and antipodal Br [Formula: see text]-substituents on the electroreduction of free-base and transition metal tetraphenylporphyrins (TPPs) are elucidated through the use of cyclic voltammetry. A systematic study of the reduction potentials for mono- and di-fused derivatives of MTPP(IND)(R)2 and MTPP(IND)2(R)2 where R = Br or H and M = Cu[Formula: see text], Ni[Formula: see text], Zn[Formula: see text] or H2 is carried out in pyridine containing 0.1 M tetrabutylammonium perchlorate (TBAP) as supporting electrolyte and demonstrates how the overall electrochemical properties of these compounds can be tuned by systematic changes in the number of meso-[Formula: see text]fused IND groups on the molecule and the presence or absence of electron-withdrawing Br [Formula: see text]-substituents. Under these solution conditions, two reversible one-electron reductions are seen for H2TPP, while three reversible reductions are obtained for H2TPP(IND) or H2TPP(IND)Br2 and four for H2TPP(IND)2Br2. Multiple reductions also occur for the other investigated mono- and di-fused metalloporphyrins. Plots of measured [Formula: see text] values for the two ring-centered reductions of compounds in a given series vs. the number of fused IND groups are linear and with slopes varying in magnitude between 15 and 230 mV/IND depending upon the product of the electron transfer (anion radical or dianion), the specific central metal ion and the presence or absence of Br substituents on the pyrrole ring opposite the fused IND group(s). It is anticipated that the information from this study can be used for predicting the reduction potentials for yet to be synthesized compounds where a specific redox reactivity is desired.
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Affiliation(s)
- W. Ryan Osterloh
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| | - Yuanyuan Fang
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| | - Nivedita Chaudhri
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India
| | - Lei Cong
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
| | - Muniappan Sankar
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee-247667, India
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, TX, 77204-5003, USA
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13
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Sun Q, Mateo LM, Robles R, Ruffieux P, Lorente N, Bottari G, Torres T, Fasel R. Inducing Open-Shell Character in Porphyrins through Surface-Assisted Phenalenyl π-Extension. J Am Chem Soc 2020; 142:18109-18117. [DOI: 10.1021/jacs.0c07781] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Qiang Sun
- nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Materials Genome Institute, Shanghai University, 200444 Shanghai, China
| | - Luis M. Mateo
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- IMDEA-Nanociencia, Campus
de Cantoblanco, 28049 Madrid, Spain
| | - Roberto Robles
- Centro de Fı́sica de Materiales, CFM/MPC (CSIC-UPV/EHU), Paseo de Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain
| | - Pascal Ruffieux
- nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Nicolas Lorente
- Centro de Fı́sica de Materiales, CFM/MPC (CSIC-UPV/EHU), Paseo de Manuel de Lardizabal 5, 20018 Donostia-San Sebastián, Spain
- Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain
| | - Giovanni Bottari
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- IMDEA-Nanociencia, Campus
de Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Tomás Torres
- Departamento de Quı́mica Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- IMDEA-Nanociencia, Campus
de Cantoblanco, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Roman Fasel
- nanotech@surfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Department of Chemistry and Biochemistry, University of Bern, 3012 Bern, Switzerland
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14
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Zhao Y, Jiang K, Li C, Liu Y, Xu C, Zheng W, Guan D, Li Y, Zheng H, Liu C, Luo W, Jia J, Zhuang X, Wang S. Precise Control of π-Electron Magnetism in Metal-Free Porphyrins. J Am Chem Soc 2020; 142:18532-18540. [DOI: 10.1021/jacs.0c07791] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yan Zhao
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kaiyue Jiang
- The meso-Entropy Matter Lab, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Can Li
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yufeng Liu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chengyang Xu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Wenna Zheng
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dandan Guan
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Yaoyi Li
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Hao Zheng
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Canhua Liu
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Weidong Luo
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Natural Sciences, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jinfeng Jia
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Xiaodong Zhuang
- The meso-Entropy Matter Lab, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shiyong Wang
- Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education), Shenyang National Laboratory for Materials Science, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
- Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, 200240, China
- Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
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15
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Chaudhri N, Cong L, Bulbul AS, Grover N, Osterloh WR, Fang Y, Sankar M, Kadish KM. Structural, Photophysical, and Electrochemical Properties of Doubly Fused Porphyrins and Related Fused Chlorins. Inorg Chem 2020; 59:1481-1495. [PMID: 31889445 DOI: 10.1021/acs.inorgchem.9b03329] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electrochemical and physicochemical properties of tetraphenylporphyrins and tetraphenylchlorins with two fused indanedione (IND) or malononitrile (MN) groups and two antipodal Br, Ph, or H β-substituents are investigated in nonaqueous media. These compounds were synthesized by oxidative fusion of free-base trans-chlorins, followed by metalation. The corresponding free-base di-fused chlorins were also isolated as intermediates and characterized for comparisons. The examined di-fused porphyrins (DFP) and di-fused chlorins (DFC) are represented as MDFP(Y)2(R)2 and H2DFC(Y)2(R)2, where M = 2H, CuII, NiII, ZnII, and CoII, Y is a fused indanedione (IND) or malononitrile group (MN), and R = H, Br, or Ph. The IND- and MN-appended compounds in both series exhibit the expected two one-electron oxidations but quite different redox behavior is observed upon reduction, where the free-base IND-appended chlorins show four reversible one-electron reductions, compared to only two for the related free-base MN-appended chlorins. Although porphyrin trianions and tetraanions have been recently described for derivatives with highly electron-withdrawing and/or π-extending substituents, this seems not to be the case for the doubly fused IND-chlorins, where the first two one-electron additions are proposed to be located at the conjugated macrocycle and the last two at the fused IND groups, each of which is reduced at a different potential, consistent with the behavior expected for two equivalent and interacting redox centers. Unlike the examined chlorins, which are all stable in their electroreduced forms, the electrogenerated anionic forms of the di-fused porphyrins are all highly reactive and characterized by cyclic voltammograms having reduction peaks not only for the synthesized compounds added to solution but also for one or more new redox active species formed at the electrode surface in homogeneous chemical reactions following electron transfer. Comparisons are made between electrochemical behavior of the structurally related porphyrins and chlorins and the sites of electron transfer assigned on the basis of known electrochemical diagnostic criteria. One of the compounds, ZnDFP(MN)2, was also structurally characterized as having a ruffled and twisted macrocyclic conformation.
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Affiliation(s)
- Nivedita Chaudhri
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247667 , India
| | - Lei Cong
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
| | - Amir Sohel Bulbul
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247667 , India
| | - Nitika Grover
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247667 , India
| | - W Ryan Osterloh
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
| | - Yuanyuan Fang
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
| | - Muniappan Sankar
- Department of Chemistry , Indian Institute of Technology Roorkee , Roorkee 247667 , India
| | - Karl M Kadish
- Department of Chemistry , University of Houston , Houston , Texas 77204-5003 , United States
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16
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Yamamoto T, Kato K, Shimizu D, Tanaka T, Osuka A. Phenylene-bridged Porphyrin meso-Oxy Radical Dimers. Chem Asian J 2019; 14:4031-4034. [PMID: 31419053 DOI: 10.1002/asia.201901033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Indexed: 02/05/2023]
Abstract
Stable meta- and para-phenylene bridged porphyrin meso-oxy radical dimers and their NiII and ZnII complexes were synthesized. All the dimers exhibited optical and electrochemical properties similar to the corresponding porphyrin meso-oxy radical monomers, indicating small electronic interaction between the two spins. Intramolecular spin-spin interaction through the π-spacer was determined to be J/kB =-15.9 K for m-phenylene bridged ZnII porphyrin dimer. The observed weak antiferromagnetic interaction has been attributed to less effective conjugation between the porphyrin radical and linking π-spacer due to large dihedral angle. In the case of ZnII complexes, both para- and meta-phenylene bridged dimers formed 1D-chain in solutions and in the solid states through Zn-O coordination.
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Affiliation(s)
- Takayuki Yamamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Kenichi Kato
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Daiki Shimizu
- 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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17
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Piskunov AV, Meshcheryakova IN, Piskunova MS, Somov NV, Bogomyakov AS, Kubrin SP. Diradical hexacoordinated tin(IV) bis-o-iminobenzosemiquinonates: synthesis, structure and magnetic properties. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.126] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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18
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Wang Q, Song M, Song X, Bu Y. Unexpected diradical character and large magnetic spin coupling in modified porphyrins induced by inverting pyrrole rings. Phys Chem Chem Phys 2019; 21:17209-17220. [PMID: 31343647 DOI: 10.1039/c9cp02691f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Porphyrin derivatives with inverted pyrrole rings have been experimentally synthesized, and their relevant electronic and magnetic properties have great application prospects in terms of electronic devices. In this work, we rationally design the structures and computationally investigate the electronic properties of porphine and Mg/Zn-porphyrin derivatives with two inverted pyrrole rings, i.e. the dipyrrole-inverted porphine and Mg/Zn-porphyrin analogues (1NN-2H, 2NN-2H, 1NN-Mg, 2NN-Mg, 1NN-Zn and 2NN-Zn), at the B3LYP/6-311G(d,p) level. The main structural characters of these porphyrin derivatives are that the [double bond splayed left]NH units of two pyrrole rings are inverted outwards and the porphyrin-like macrocycles are distorted from square to diamond shapes. More interestingly, these dipyrrole-inverted porphyrin derivatives present diradical characters with noticeably large antiferromagnetic spin coupling constants, i.e.-982.2/-936.3 cm-1 for 1NN-2H/2NN-2H, -796.3/-764.2 cm-1 for 1NN-Mg/2NN-Mg and -1044.5/-1055.2 cm-1 for 1NN-Zn/2NN-Zn, but their monopyrrole-inverted counterparts do not. Examinations of the orbital properties featuring large occupation numbers of the lowest unoccupied natural orbitals and two singly occupied molecular orbitals that are polarized in opposite directions also confirm these findings. These porphyrin derivatives have small singlet-triplet energy gaps and small energy gaps between the highest occupied molecular orbital and lowest unoccupied molecular orbital of the closed-shell singlet states. These are conducive to the emergence of diradical character and large spin coupling constants. Furthermore, the spin-alternation analyses show that each dipyrrole-inverted porphyrin derivative has two resonant structures featuring two spin-opposite single electrons, in agreement with the observed antiferromagnetic spin couplings. This work provides novel insights into the electronic structures and properties of the porphyrin derivatives with modified structures and also provides helpful information for the rational design, synthesis and characterization of new porphyrin-based magnets.
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Affiliation(s)
- Qi Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, People's Republic of China.
| | - Meiyu Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, People's Republic of China.
| | - Xinyu Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, People's Republic of China.
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, People's Republic of China.
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19
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Affiliation(s)
- Kenichi Kato
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
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20
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Kato K, Osuka A. Platforms for Stable Carbon‐Centered Radicals. Angew Chem Int Ed Engl 2019; 58:8978-8986. [DOI: 10.1002/anie.201900307] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Kenichi Kato
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of ChemistryGraduate School of ScienceKyoto University Oiwake-cho, Kitashirakawa, Sakyo-ku Kyoto 606-8502 Japan
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21
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Abstract
A family of push-pull quinoidal porphyrin monomers has been prepared from a meso-formyl porphyrin by bromination, thioacetal formation, palladium-catalyzed coupling with malononitrile and oxidation with DDQ. Attempts at extending this synthesis to a push-pull quinoidal/cumulenic porphyrin dimer were not successful. The crystal structures of the quinoidal porphyrins indicate that there is no significant contribution from singlet biradical or zwitterionic resonance forms. The crystal structure of an ethyne-linked porphyrin dimer shows that the torsion angle between the porphyrin units is only about 3°, in keeping with crystallographic results on related compounds, but contrasting with the torsion angle of about 35° predicted by computational studies. The free-base quinoidal porphyrin monomers form tightly π-stacked layer structures, despite their curved geometries and bulky aryl substituents.
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Affiliation(s)
- Martin J Smith
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford OX1 3TA, UK.
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22
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Ooi S, Shimizu D, Furukawa K, Tanaka T, Osuka A. Stable Face-to-Face Singlet Diradicaloids: Triply Linked Corrole Dimer Gallium(III) Complexes with Two μ
-Hydroxo-Bridges. Angew Chem Int Ed Engl 2018; 57:14916-14920. [DOI: 10.1002/anie.201810200] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Shota Ooi
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Daiki Shimizu
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Ko Furukawa
- Center for Coordination of Research Facilities; Niigata University; Nishi-ku Niigata 950-2181 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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23
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Ooi S, Shimizu D, Furukawa K, Tanaka T, Osuka A. Stable Face-to-Face Singlet Diradicaloids: Triply Linked Corrole Dimer Gallium(III) Complexes with Two μ
-Hydroxo-Bridges. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810200] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shota Ooi
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Daiki Shimizu
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Ko Furukawa
- Center for Coordination of Research Facilities; Niigata University; Nishi-ku Niigata 950-2181 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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24
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Yamane M, Kishi R, Tonami T, Okada K, Nagami T, Kitagawa Y, Nakano M. Open-Shell Characters, Aromaticities and Third-Order Nonlinear Optical Properties of Carbon Nanobelts Composed of Five- and Six-Membered Rings. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masaki Yamane
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Ryohei Kishi
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Takayoshi Tonami
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Kenji Okada
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Takanori Nagami
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
- Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science; Osaka University; Toyonaka, Osaka 560-8531 Japan
| | - Masayoshi Nakano
- Department of Materials Engineering Science, Graduate School of Engineering Science; Osaka University; 1-3 Machikaneyama Toyonaka, Osaka 560-8531 Japan
- Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science; Osaka University; Toyonaka, Osaka 560-8531 Japan
- Institute for Molecular Science (IMS); 38 Nishigo-Naka Myodaiji, Okazaki 444-8585 Japan
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25
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Thiophene and its sulfur inhibit indenoindenodibenzothiophene diradicals from low-energy lying thermal triplets. Nat Chem 2018; 10:1134-1140. [PMID: 30224686 DOI: 10.1038/s41557-018-0133-5] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 08/02/2018] [Indexed: 11/08/2022]
Abstract
Many qualitative structure-property correlations between diradical character and emerging molecular properties are known. For example, the increase of diradical character further decreases the singlet-triplet energy gap. Here we show that inclusion of thiophenes within a quinoidal polycyclic hydrocarbon imparts appreciable diradical character yet retains the large singlet-triplet energy gap, a phenomenon that has no precedent in the literature. The low aromatic character of thiophene and its electron-rich nature are the key properties leading to these unique findings. A new indenoindenodibenzothiophene scaffold has been prepared and fully characterized by several spectroscopies, magnetic measurements, solid-state X-ray and state-of-the-art quantum chemical calculations, all corroborating this unique dichotomy between the diradical input and the emerging magnetic properties. New structure-property relationships such as these are not only extremely important in the field of diradical chemistry and organic electronics, but also provide new insights into the versatility of π-electron chemical bonding.
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26
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Rana A, Hong Y, Gopalakrishna TY, Phan H, Herng TS, Yadav P, Ding J, Kim D, Wu J. Stable Expanded Porphycene-Based Diradicaloid and Tetraradicaloid. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807411] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anup Rana
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Yongseok Hong
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | | | - Hoa Phan
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Tun Seng Herng
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Priya Yadav
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Jun Ding
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Jishan Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
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27
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Rana A, Hong Y, Gopalakrishna TY, Phan H, Herng TS, Yadav P, Ding J, Kim D, Wu J. Stable Expanded Porphycene-Based Diradicaloid and Tetraradicaloid. Angew Chem Int Ed Engl 2018; 57:12534-12537. [DOI: 10.1002/anie.201807411] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Anup Rana
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Yongseok Hong
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | | | - Hoa Phan
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Tun Seng Herng
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Priya Yadav
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Jun Ding
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Jishan Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
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28
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Messelberger J, Grünwald A, Pinter P, Hansmann MM, Munz D. Carbene derived diradicaloids - building blocks for singlet fission? Chem Sci 2018; 9:6107-6117. [PMID: 30090299 PMCID: PMC6053972 DOI: 10.1039/c8sc01999a] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/25/2018] [Indexed: 12/13/2022] Open
Abstract
Organic singlet diradicaloids promise application in non-linear optics, electronic devices and singlet fission. The stabilization of carbon allotropes/cumulenes (C1, C2, C4) by carbenes has been equally an area of high activity. Combining these fields, we showed recently that carbene scaffolds allow as well for the design of diradicaloids. Herein, we report a comprehensive computational investigation (CASSCF/NEVPT2; fractional occupation DFT) on the electronic properties of carbene-bridge-carbene type diradicaloids. We delineate how to adjust the properties of these ensembles through the choice of carbene and bridge and show that already a short C2 bridge results in remarkable diradicaloid character. The choice of the carbene separately tunes the energies of the S1 and T1 excited states, whereas the bridge adjusts the overall energy level of the excited states. Accordingly, we develop guidelines on how to tailor the electronic properties of these molecules. Of particular note, fractional occupation DFT is an excellent tool to predict singlet-triplet gaps.
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Affiliation(s)
- Julian Messelberger
- Friedrich-Alexander Universität Erlangen-Nürnberg , Anorganische und Allgemeine Chemie , Egerlandstr. 1 , 91058 Erlangen , Germany .
| | - Annette Grünwald
- Friedrich-Alexander Universität Erlangen-Nürnberg , Anorganische und Allgemeine Chemie , Egerlandstr. 1 , 91058 Erlangen , Germany .
| | - Piermaria Pinter
- Technische Universität Dresden, Physikalische Organische Chemie , Bergstr. 66 , 01069 Dresden , Germany
| | - Max M Hansmann
- Georg-August Universität Göttingen , Institut für Organische und Biomolekulare Chemie , Tammannstraße 2 , 37073 Göttingen , Germany
| | - Dominik Munz
- Friedrich-Alexander Universität Erlangen-Nürnberg , Anorganische und Allgemeine Chemie , Egerlandstr. 1 , 91058 Erlangen , Germany .
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29
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Zeng W, Hong Y, Medina Rivero S, Kim J, Zafra JL, Phan H, Gopalakrishna TY, Herng TS, Ding J, Casado J, Kim D, Wu J. Stable Nitrogen-Centered Bis(imino)rylene Diradicaloids. Chemistry 2018; 24:4944-4951. [PMID: 29396877 DOI: 10.1002/chem.201706041] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Indexed: 12/11/2022]
Abstract
The synthesis of stable open-shell singlet diradicaloids is critical for their practical material application. So far, most reported examples are based on carbon-centered radicals, which are intrinsically reactive, and there are very few examples of stable nitrogen-centered diradicaloids. In this full paper, a series of soluble and stable bis(imino)rylenes up to octarylene were synthesized on the basis of newly developed dibromorylene intermediates. It was found that from hexarylene onward, these quinoidal rylenes showed open-shell singlet ground states and could be thermally populated to paramagnetic triplet aminyl diradicals. They are stable due to efficient spin delocalization onto the rylene backbone as well as kinetic blocking of the aminyl sites by the bulky and electron-deficient 2,4,6-trichlorophenyl groups. They exhibited very different electronic structures, diradical character, excited-state dynamics, one-photon absorption, two-photon absorption, and electrochemical properties from their respective aromatic rylene counterparts. These bis(imino)rylenes represent a rare class of stable, neutral, nitrogen-centered aminyl diradicaloids.
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Affiliation(s)
- Wangdong Zeng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore.,Institute of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, 411201, P. R. China
| | - Yongseok Hong
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea
| | - Samara Medina Rivero
- Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 229071, Malaga, Spain
| | - Jinseok Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea
| | - José L Zafra
- Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 229071, Malaga, Spain
| | - Hoa Phan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Tullimilli Y Gopalakrishna
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Tun Seng Herng
- Department of Materials Science & Engineering, National University of Singapore, 119260, Singapore, Singapore
| | - Jun Ding
- Department of Materials Science & Engineering, National University of Singapore, 119260, Singapore, Singapore
| | - Juan Casado
- Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, 229071, Malaga, Spain
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 03722, Korea
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
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30
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Rausch R, Schmidt D, Bialas D, Krummenacher I, Braunschweig H, Würthner F. Stable Organic (Bi)Radicals by Delocalization of Spin Density into the Electron-Poor Chromophore Core of Isoindigo. Chemistry 2018; 24:3420-3424. [DOI: 10.1002/chem.201706002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Rodger Rausch
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry; Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
| | - David Schmidt
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry; Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
| | - David Bialas
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry; Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Frank Würthner
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
- Center for Nanosystems Chemistry; Universität Würzburg; Theodor-Boveri-Weg 97074 Würzburg Germany
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31
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Shimizu D, Osuka A. Porphyrinoids as a platform of stable radicals. Chem Sci 2018; 9:1408-1423. [PMID: 29675188 PMCID: PMC5892410 DOI: 10.1039/c7sc05210c] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 01/05/2018] [Indexed: 12/15/2022] Open
Abstract
The non-innocent ligand nature of porphyrins was observed for compound I in enzymatic cycles of cytochrome P450. Such porphyrin radicals were first regarded as reactive intermediates in catabolism, but recent studies have revealed that porphyrinoids, including porphyrins, ring-contracted porphyrins, and ring-expanded porphyrins, display excellent radical-stabilizing abilities to the extent that radicals can be handled like usual closed-shell organic molecules. This review surveys four types of stable porphyrinoid radical and covers their synthetic methods and properties such as excellent redox properties, NIR absorption, and magnetic properties. The radical-stabilizing abilities of porphyrinoids stem from their unique macrocyclic conjugated systems with high electronic and structural flexibilities.
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Affiliation(s)
- Daiki Shimizu
- Department of Chemistry , Graduate School of Science , Kyoto University , Kyoto 606-8502 , Japan .
| | - Atsuhiro Osuka
- Department of Chemistry , Graduate School of Science , Kyoto University , Kyoto 606-8502 , Japan .
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32
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Abstract
The facile synthesis and physical characterization of a meso-fluorenyl smaragdyrin monoradical 4, which is stable due to efficient spin delocalization and kinetic blocking, is reported. It has a small energy gap and can be oxidized and reduced into the respective cation and anion, showing different charge distribution and electronic absorption properties.
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Affiliation(s)
- Hemanta Kalita
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
| | | | - Jishan Wu
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
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33
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Zhang H, Phan H, Herng TS, Gopalakrishna TY, Zeng W, Ding J, Wu J. Conformationally Flexible Bis(9-fluorenylidene)porphyrin Diradicaloids. Angew Chem Int Ed Engl 2017; 56:13484-13488. [DOI: 10.1002/anie.201707480] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Hejian Zhang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Hoa Phan
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Tun Seng Herng
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | | | - Wangdong Zeng
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Jun Ding
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Jishan Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
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34
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Zhang H, Phan H, Herng TS, Gopalakrishna TY, Zeng W, Ding J, Wu J. Conformationally Flexible Bis(9-fluorenylidene)porphyrin Diradicaloids. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707480] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hejian Zhang
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Hoa Phan
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Tun Seng Herng
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | | | - Wangdong Zeng
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
| | - Jun Ding
- Department of Materials Science and Engineering; National University of Singapore; 119260 Singapore Singapore
| | - Jishan Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Singapore
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35
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Lu X, Lee S, Hong Y, Phan H, Gopalakrishna TY, Herng TS, Tanaka T, Sandoval-Salinas ME, Zeng W, Ding J, Casanova D, Osuka A, Kim D, Wu J. Fluorenyl Based Macrocyclic Polyradicaloids. J Am Chem Soc 2017; 139:13173-13183. [DOI: 10.1021/jacs.7b07335] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuefeng Lu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Sangsu Lee
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Yongseok Hong
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 03722, Korea
| | - Hoa Phan
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | | | - Tun Seng Herng
- Department of Materials Science & Engineering, National University of Singapore, 119260 Singapore
| | - Takayuki Tanaka
- Department
of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - María Eugenia Sandoval-Salinas
- Departament
de Ciència de Materials i Química Física, Institut
de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain
- Kimika Fakultatea, Euskal Herriko Unibertsitatea & Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastián, Euskadi, Spain
| | - Wangdong Zeng
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Jun Ding
- Department of Materials Science & Engineering, National University of Singapore, 119260 Singapore
| | - David Casanova
- Kimika Fakultatea, Euskal Herriko Unibertsitatea & Donostia International Physics Center, Paseo Manuel de Lardizabal, 4, 20018 Donostia-San Sebastián, Euskadi, Spain
- IKERBASQUE - Basque Foundation for Science, Bilbao 48013, Euskadi, Spain
| | - Atsuhiro Osuka
- 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 03722, Korea
| | - Jishan Wu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
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36
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Mukherjee A, Sau SC, Mandal SK. Exploring Closed-Shell Cationic Phenalenyl: From Catalysis to Spin Electronics. Acc Chem Res 2017; 50:1679-1691. [PMID: 28665582 DOI: 10.1021/acs.accounts.7b00141] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The odd alternant hydrocarbon phenalenyl (PLY) can exist in three different forms, a closed-shell cation, an open-shell radical, and a closed-shell anion, using its nonbonding molecular orbital (NBMO). The chemistry of PLY-based molecules began more than five decades ago, and so far, the progress has mainly involved the open-shell neutral radical state. Over the last two decades, we have witnessed the evolution of a range of PLY-based radicals generating an array of multifunctional materials. However, it has been admitted that the practical applications of PLY radicals are greatly challenged by the low stability of the open-shell (radical) state. Recently, we took a different route to establish the utility of these PLY molecules using the closed-shell cationic state. In such a design, the closed-shell unit of PLY can readily accept free electrons, stabilizing in its NBMO upon generation of the open-shell state of the molecule. Thus, one can synthetically avoid the unstable open-shell state but still take advantage of this state by in situ generating the radical through external electron transfer or spin injection into the empty NBMO. It is worth noting that such approaches using closed-shell phenalenyl have been missing in the literature. This Account focuses on our recent developments using the closed-shell cationic state of the PLY molecule and its application in broad multidisciplinary areas spanning from catalysis to spin electronics. We describe how this concept has been utilized to develop a variety of homogeneous catalysts. For example, this concept was used in designing an iron(III) PLY-based electrocatalyst for a single-compartment H2O2 fuel cell, which delivered the best electrocatalytic activity among previously reported iron complexes, organometallic catalysts for various homogeneous organic transformations (hydroamination and polymerization), an organic Lewis acid catalyst for the ring opening of epoxides, and transition-metal-free C-H functionalization catalysts. Moreover, this concept of using the empty NBMO present in the closed-shell cationic state of the PLY moiety to capture electron(s) was further extended to an entirely different area of spin electronics to design a PLY-based spin-memory device, which worked by a spin-filtration mechanism using an organozinc compound based on a PLY backbone deposited over a ferromagnetic substrate. In this Account, we summarize our recent efforts to understand how this unexplored closed-shell state of the phenalenyl molecule, which has been known for over five decades, can be utilized in devising an array of materials that not only are important from an organometallic chemistry or organic chemistry point of view but also provide new understanding for device physics.
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Affiliation(s)
- Arup Mukherjee
- Department
of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - Samaresh Chandra Sau
- Department
of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
| | - Swadhin K. Mandal
- Department
of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741246, India
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37
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Reddy BK, Basavarajappa A, Ambhore MD, Anand VG. Isophlorinoids: The Antiaromatic Congeners of Porphyrinoids. Chem Rev 2016; 117:3420-3443. [DOI: 10.1021/acs.chemrev.6b00544] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- B. Kiran Reddy
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune − 411008, Maharashtra, India
| | - Ashokkumar Basavarajappa
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune − 411008, Maharashtra, India
| | - Madan D. Ambhore
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune − 411008, Maharashtra, India
| | - Venkataramanarao G. Anand
- Department of Chemistry, Indian Institute of Science Education and Research, Dr. Homi Bhabha Road, Pune − 411008, Maharashtra, India
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38
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Tanaka T, Osuka A. Chemistry of meso-Aryl-Substituted Expanded Porphyrins: Aromaticity and Molecular Twist. Chem Rev 2016; 117:2584-2640. [DOI: 10.1021/acs.chemrev.6b00371] [Citation(s) in RCA: 283] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takayuki Tanaka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Kyoto 606-8501, Japan
| | - Atsuhiro Osuka
- Department of Chemistry,
Graduate School of Science, Kyoto University, Kyoto 606-8501, Japan
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39
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Fukui N, Cha W, Shimizu D, Oh J, Furukawa K, Yorimitsu H, Kim D, Osuka A. Highly planar diarylamine-fused porphyrins and their remarkably stable radical cations. Chem Sci 2016; 8:189-199. [PMID: 28451165 PMCID: PMC5308406 DOI: 10.1039/c6sc02721k] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 07/30/2016] [Indexed: 11/23/2022] Open
Abstract
Oxidative fusion of a meso-phenoxazino Ni(ii) porphyrin at high temperature gave a doubly phenoxazine-fused porphyrin as a highly planar diarylamine-fused porphyrin. One-electron oxidation of the corresponding β,β-dichlorinated compound gave a remarkably stable radical cation.
Oxidative fusion reactions of meso-phenoxazino Ni(ii) porphyrin were found to be temperature dependent, giving rise to either a doubly phenylene-fused product at room temperature or a singly phenoxazine-fused product at 70 °C. The latter was further oxidized to a doubly phenoxazine-fused Ni(ii) porphyrin, which was subsequently converted to the corresponding free base porphyrin and Zn(ii) porphyrin. Compared to previously reported diphenylamine-fused porphyrins that displayed a molecular twist, doubly phenoxazine-fused porphyrins exhibited distinctly different properties owing to their highly planar structures, such as larger fluorescence quantum yields, formation of an offset face-to-face dimer both in solution and the solid state, and the generation of a mixed-valence π-radical cation dimer upon electrochemical oxidation. One-electron oxidation of the phenoxazine-fused Ni(ii) porphyrin with Magic Blue gave the corresponding radical cation, which was certainly stable and could be isolated by separation over a silica gel column but slowly chlorinated at the reactive β-positions in the solid state. This finding led to us to examine β,β′-dichlorinated phenoxazine-fused and diphenylamine-fused Ni(ii) porphyrins, which, upon treatment with Magic Blue, provided remarkably stable radical cations to an unprecedented level. It is actually possible to purify these radical cations by silica gel chromatography, and they can be stored for over 6 months without any sign of deterioration. Moreover, they exhibited no degradation even after the CH2Cl2 solution was washed with water. However, subtle structural differences (planar versus partly twisted) led to different crystal packing structures and solid-state magnetic properties.
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Affiliation(s)
- Norihito Fukui
- Department of Chemistry , Graduate School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 , Japan . ;
| | - Wonhee Cha
- Spectroscopy Laboratory of Functional π-Electronic Systems and Department of Chemistry , Yonsei University , Seoul 120-749 , Korea .
| | - Daiki Shimizu
- Department of Chemistry , Graduate School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 , Japan . ;
| | - Juwon Oh
- Spectroscopy Laboratory of Functional π-Electronic Systems and Department of Chemistry , Yonsei University , Seoul 120-749 , Korea .
| | - Ko Furukawa
- Center for Instrumental Analysis , Niigata University , Nishi-ku , Niigata 950-2181 , Japan .
| | - Hideki Yorimitsu
- Department of Chemistry , Graduate School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 , Japan . ;
| | - Dongho Kim
- Spectroscopy Laboratory of 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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40
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Ghosh A, Srinivasan A, Suresh CH, Chandrashekar TK. [40]π Fused and Nonfused Core-Modified Nonaphyrins: Syntheses and Structural Diversity. Chemistry 2016; 22:11152-5. [DOI: 10.1002/chem.201602245] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Arindam Ghosh
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), Bhubaneswar -; 751005 Odisha India
| | - A. Srinivasan
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), Bhubaneswar -; 751005 Odisha India
| | - Cherumuttathu H. Suresh
- Inorganic & Theoretical Chemistry Section; Chemical Sciences and Technology Division; CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum -; 695019 Kerala India
| | - Tavarekere K. Chandrashekar
- School of Chemical Sciences; National Institute of Science Education and Research (NISER), Bhubaneswar -; 751005 Odisha India
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41
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Stępień M, Gońka E, Żyła M, Sprutta N. Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds: Synthetic Routes, Properties, and Applications. Chem Rev 2016; 117:3479-3716. [PMID: 27258218 DOI: 10.1021/acs.chemrev.6b00076] [Citation(s) in RCA: 865] [Impact Index Per Article: 108.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two-dimensionally extended, polycyclic heteroaromatic molecules (heterocyclic nanographenes) are a highly versatile class of organic materials, applicable as functional chromophores and organic semiconductors. In this Review, we discuss the rich chemistry of large heteroaromatics, focusing on their synthesis, electronic properties, and applications in materials science. This Review summarizes the historical development and current state of the art in this rapidly expanding field of research, which has become one of the key exploration areas of modern heterocyclic chemistry.
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Affiliation(s)
- Marcin Stępień
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Elżbieta Gońka
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Marika Żyła
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Natasza Sprutta
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
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42
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Umetani M, Naoda K, Tanaka T, Lee SK, Oh J, Kim D, Osuka A. Synthesis of Di-peri-dinaphthoporphyrins by PtCl2 -Mediated Cyclization of Quinodimethane-type Porphyrins. Angew Chem Int Ed Engl 2016; 55:6305-9. [PMID: 27073133 DOI: 10.1002/anie.201601303] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 03/21/2016] [Indexed: 01/23/2023]
Abstract
Di-peri-dinaphthoporphyrins can be regarded as a key and common substructure of fused porphyrinoids. PtCl2 -mediated cycloisomerization reaction of quinodimethane-type porphyrins provided these doubly fused porphyrins, which exhibit characteristic paratropic ring currents that presumably arise from 24π antiaromatic circuit as a dominant resonance contributor. UV/Vis absorption spectra, cyclic voltammetry, and excited-state dynamics as well as theoretical calculation support this conclusion.
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Affiliation(s)
- Masataka Umetani
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Koji Naoda
- 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
| | - Seung-Kyu Lee
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 120-749, Korea
| | - Juwon Oh
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul, 120-749, Korea
| | - 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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43
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Umetani M, Naoda K, Tanaka T, Lee SK, Oh J, Kim D, Osuka A. Synthesis of Di-peri
-dinaphthoporphyrins by PtCl2
-Mediated Cyclization of Quinodimethane-type Porphyrins. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Masataka Umetani
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Koji Naoda
- 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
| | - Seung-Kyu Lee
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Juwon Oh
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - 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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44
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Karthik G, Cha WY, Ghosh A, Kim T, Srinivasan A, Kim D, Chandrashekar TK. Phenylene-Bridged Core-Modified Planar Aromatic Octaphyrin: Aromaticity, Photophysical and Anion Receptor Properties. Chem Asian J 2016; 11:1447-53. [DOI: 10.1002/asia.201600177] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Ganesan Karthik
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Bhubaneswar 752-050 Odisha India
| | - Won-Young Cha
- Department of Chemistry; Yonsei University; Shinchon-dong 134, Seodaemoon-gu Seoul 120-749 Korea
| | - Arindam Ghosh
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Bhubaneswar 752-050 Odisha India
| | - Taeyeon Kim
- Department of Chemistry; Yonsei University; Shinchon-dong 134, Seodaemoon-gu Seoul 120-749 Korea
| | - A. Srinivasan
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Bhubaneswar 752-050 Odisha India
| | - Dongho Kim
- Department of Chemistry; Yonsei University; Shinchon-dong 134, Seodaemoon-gu Seoul 120-749 Korea
| | - Tavarekere K. Chandrashekar
- School of Chemical Sciences; National Institute of Science Education and Research (NISER); Bhubaneswar 752-050 Odisha India
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45
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Diev VV, Femia D, Zhong Q, Djurovich PI, Haiges R, Thompson ME. A quinoidal bis-phenalenyl-fused porphyrin with supramolecular organization and broad near-infrared absorption. Chem Commun (Camb) 2016; 52:1949-52. [DOI: 10.1039/c5cc09128d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A concise synthesis is disclosed for a quinoidal bis-phenalenyl-fused porphyrin that displays near-infrared absorption and supramolecular organization in the solid state.
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Affiliation(s)
| | - Denise Femia
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | - Qiwen Zhong
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | | | - Ralf Haiges
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
| | - Mark E. Thompson
- Department of Chemistry
- University of Southern California
- Los Angeles
- USA
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46
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Fukuzumi S, Ohkubo K, Ishida M, Preihs C, Chen B, Borden WT, Kim D, Sessler JL. Formation of Ground State Triplet Diradicals from Annulated Rosarin Derivatives by Triprotonation. J Am Chem Soc 2015. [PMID: 26203891 DOI: 10.1021/jacs.5b05309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Annulated rosarins, β,β'-bridged hexaphyrin(1.0.1.0.1.0) derivatives 1-3, are formally 24 π-electron antiaromatic species. At low temperature, rosarins 2 and 3 are readily triprotonated in the presence of trifluoroacetic acid in dichloromethane to produce ground state triplet diradicals, as inferred from electron paramagnetic resonance (EPR) spectral studies. From an analysis of the fine structure in the EPR spectrum of triprotonated rosarin H₃3(3+), a distance of 3.6 Å between the two unpaired electrons was estimated. The temperature dependence of the singlet-triplet equilibrium was determined by means of an EPR titration. Support for these experimental findings came from calculations carried out at the (U)B3LYP/6-31G* level, which served to predict a very low-lying triplet state for the triprotonated form of a simplified model system 1.
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Affiliation(s)
- Shunichi Fukuzumi
- †Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology (JST), Suita, Osaka 565-0871, Japan.,‡Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea.,§Faculty of Science and Engineering, ALCA, SENTAN, Japan Science and Technology Agency (JST), Meijo University, Nagoya, Aichi 468-0073, Japan
| | - Kei Ohkubo
- †Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA and SENTAN, Japan Science and Technology (JST), Suita, Osaka 565-0871, Japan.,‡Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Masatoshi Ishida
- ∥Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Christian Preihs
- ⊥Department of Chemistry, The University of Texas, Austin, Texas 78712-1224, United States
| | - Bo Chen
- #Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5070, United States
| | - Weston Thatcher Borden
- #Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5070, United States
| | - Dongho Kim
- ∥Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Jonathan L Sessler
- ∥Department of Chemistry, Yonsei University, Seoul 120-749, Korea.,⊥Department of Chemistry, The University of Texas, Austin, Texas 78712-1224, United States
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47
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Yu C, Jiao L, Li T, Wu Q, Miao W, Wang J, Wei Y, Mu X, Hao E. Fusion and planarization of bisBODIPY: a new family of photostable near infrared dyes. Chem Commun (Camb) 2015; 51:16852-5. [DOI: 10.1039/c5cc07304a] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of directly-fused bisBODIPY BBP was developed by fusion and planarization of bisBODIPY 4 through a FeCl3-mediated intramolecular oxidative cyclodehydrogenation reaction, showing intriguing electrochemical and spectroscopic properties.
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Affiliation(s)
- Changjiang Yu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Lijuan Jiao
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Tingting Li
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Qinghua Wu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Wei Miao
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Jun Wang
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Yun Wei
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Xiaolong Mu
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
| | - Erhong Hao
- The Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- School of Chemistry and Materials Science
- Anhui Normal University
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