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Kim J, Oh J, Osuka A, Kim D. Porphyrinoids, a unique platform for exploring excited-state aromaticity. Chem Soc Rev 2021; 51:268-292. [PMID: 34879124 DOI: 10.1039/d1cs00742d] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Recently, Baird (anti)aromaticity has been referred to as a description of excited-state (anti)aromaticity. With the term of Baird's rule, recent studies have intensively verified that the Hückel aromatic [4n + 2]π (or antiaromatic [4n]π) molecules in the ground state are reversed to give Baird aromatic [4n]π (or Baird antiaromatic [4n + 2]π) molecules in the excited states. Since the Hückel (anti)aromaticity has great influence on the molecular properties and reaction mechanisms, the Baird (anti)aromaticity has been expected to act as a dominant factor in governing excited-state properties and processes, which has attracted intensive scientific investigations for the verification of the concept of reversed aromaticity in the excited states. In this scientific endeavor, porphyrinoids have recently played leading roles in the demonstration of the aromaticity reversal in the excited states and its conceptual development. The distinct structural and electronic nature of porphyhrinoids depending on their (anti)aromaticity allow the direct observation of excited-state aromaticity reversal, Baird's rule. The explicit experimental demonstration with porphyrinoids has contributed greatly to its conceptual development and application in novel functional organic materials. Based on the significant role of porphyrinoids in the field of excited-state aromaticity, this review provides an overview of the experimental verification of the reversal concept of excited-state aromaticity by porphyrinoids and the recent progress on its conceptual application in novel functional molecules.
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Affiliation(s)
- Jinseok Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Korea.
| | - Juwon Oh
- Department of Chemistry, Soonchunhyang University, Asan-si 31538, Korea.
| | - Atsuhiro Osuka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
| | - Dongho Kim
- Department of Chemistry, Yonsei University, Seoul 03722, Korea.
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2
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Dorazio SJ, Vogel A, Dechert S, Nevonen DE, Nemykin VN, Brückner C, Meyer F. Siamese-Twin Porphyrin Goes Platinum: Group 10 Monometallic, Homobimetallic, and Heterobimetallic Complexes. Inorg Chem 2020; 59:7290-7305. [PMID: 32374995 DOI: 10.1021/acs.inorgchem.0c00714] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A series of PtII-based monometallic (H2PtL), homobimetallic (Pt2L), and heterobimetallic (NiPtL and PdPtL) group 10 complexes of the previously established expanded twin porphyrin (H4L) were prepared. Structural characterization of the bimetallic PtII series (Pt2L, NiPtL, and PdPtL) revealed their similar general structures, with slight differences correlated to the ion size. An improvement of the metal-ion insertion process also allowed efficient preparation of the known Pd2L complex, and the novel heterobimetallic NiPdL complex was also structurally characterized. UV-vis spectroscopy, NMR spectroscopy, magnetic circular dichroism (MCD), and (spectro)electrochemistry were used to characterize the complexes; the electronic properties followed largely established lines for metal complexes of the twin porphyrin, except that the PtII-based systems exhibited more complex UV-vis spectral signatures. MCD spectra accompanied by density functional theory (DFT)/time-dependent DFT computations (TDDFT) rationalize the origins of the optical features of the twin porphyrin. The presence of the nonplanar, nonaromatic macrocyclic π system with conjugation pathways confined to each half of the molecule could be visualized. Significant pyrazole(π) → pyrrole(π*) charge-transfer character was predicted for several transitions in the visible region. This study adds to our fundamental understanding of the formation, structure, and electronic structure of bimetallic complexes of this class of expanded metalloporphyrins containing nonpyrrolic moieties.
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Affiliation(s)
- Sarina J Dorazio
- Institute for Inorganic Chemistry, University of Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany.,Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Anastasia Vogel
- Institute for Inorganic Chemistry, University of Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Sebastian Dechert
- Institute for Inorganic Chemistry, University of Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
| | - Dustin E Nevonen
- Department of ChemistryUniversity of Manitoba, 360 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
| | - Victor N Nemykin
- Department of ChemistryUniversity of Manitoba, 360 Parker Building, Winnipeg, Manitoba R3T 2N2, Canada
| | - Christian Brückner
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Franc Meyer
- Institute for Inorganic Chemistry, University of Göttingen, Tammannstraße 4, D-37077 Göttingen, Germany
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Basumatary B, Mitsuno K, Ishida M, Furuta H. Bis-palladium(II) complex of doubly N-confused octaphyrin(1.1.1.1.1.1.1.1): Möbius aromaticity and chiroptical properties. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501116] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A novel bis-palladium(II) complex of doubly N-confused octaphyrin (Pd[Formula: see text]-2) adopting a Möbius-twisted topological structure was synthesized and characterized. Due to the effective 36[Formula: see text]-electronic delocalization over the Möbius-twisted octaphyrin scaffold, characteristic Soret and Q-like absorption features were observed in the near-infrared (NIR) region. However, the complex Pd[Formula: see text]-2 exhibited weak aromatic character attributed to the distinct cross-conjugated resonance contribution as inferred from the 1H NMR chemical shifts as well as theoretical assessments ([Formula: see text] nucleus-independent chemical shift (NICS)). Since the bis-palladium(II) complexation of doubly N-confused octaphyrin 2 imparted significant conformational stability, topologically chiral enantiomers of Pd[Formula: see text]-2 were successfully separated as ([Formula: see text]- and ([Formula: see text]-twisted forms. The resulting isomers revealed relatively large circular dichroism (CD) responses with an absorption anisotropy factor of [Formula: see text] [Formula: see text] 0.009 in the NIR region ([Formula: see text] 823 nm). In addition, the cyclic voltammogram of Pd[Formula: see text]-2 revealed redox-rich properties due to its large [Formula: see text]-conjugated system.
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Affiliation(s)
- Biju Basumatary
- Department of Chemistry and Biochemistry, Graduate School of Engineering and Center for Molecular Systems, Kyushu University, Fukuoka, 819-0395 Japan
| | - Koki Mitsuno
- Department of Chemistry and Biochemistry, Graduate School of Engineering and Center for Molecular Systems, Kyushu University, Fukuoka, 819-0395 Japan
| | - Masatoshi Ishida
- Department of Chemistry and Biochemistry, Graduate School of Engineering and Center for Molecular Systems, Kyushu University, Fukuoka, 819-0395 Japan
| | - Hiroyuki Furuta
- Department of Chemistry and Biochemistry, Graduate School of Engineering and Center for Molecular Systems, Kyushu University, Fukuoka, 819-0395 Japan
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4
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Ke XS, Kim T, He Q, Lynch VM, Kim D, Sessler JL. Three-Dimensional Fully Conjugated Carbaporphyrin Cage. J Am Chem Soc 2018; 140:16455-16459. [PMID: 30452259 DOI: 10.1021/jacs.8b11158] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A fully conjugated three-dimensional (3D) expanded carbaporphyrin (2) was prepared in a one-pot procedure that involves a [2+4] condensation reaction between a dibenzo[ g, p]chrysene-bearing tetrapyrrole precursor (1) and pentafluorobenzaldehyde, followed by oxidation. Single crystal X-ray diffraction analysis revealed that 2 possesses a cage-like structure consisting of four dipyrromethenes and two bridging dibenzo[ g, p]chrysene units. As prepared, 2 is nonaromatic as inferred from UV-vis-NIR and 1H NMR spectroscopy and a near-zero (-1.75) nucleus-independent chemical shift (NICS) value. In contrast, after protonation with trifluoroacetic acid (TFA), the cage gains global aromatic character as inferred from the large negative NICS value (-11.63) and diatropic ring current observed in the anisotropy of the induced current density (ACID) plot, as well as the ca. 8-fold increase in the excited state lifetime. In addition, the size of the cavity increases to ca. 143 Å3 upon protonation as deduced from a single crystal X-ray diffraction analysis. To our knowledge, this is the largest carbaporphyrin prepared to date and the first with a fully conjugated 3D cage structure whose size and electronic features may be tuned through protonation.
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Affiliation(s)
- Xian-Sheng Ke
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712-1224 , United States
| | - Taeyeon Kim
- Department of Chemistry , Yonsei University , Seoul 03722 , Korea
| | - Qing He
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712-1224 , United States
| | - Vincent M Lynch
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712-1224 , United States
| | - Dongho Kim
- Department of Chemistry , Yonsei University , Seoul 03722 , Korea
| | - Jonathan L Sessler
- Department of Chemistry , The University of Texas at Austin , Austin , Texas 78712-1224 , United States
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Oh J, Sung YM, Hong Y, Kim D. Spectroscopic Diagnosis of Excited-State Aromaticity: Capturing Electronic Structures and Conformations upon Aromaticity Reversal. Acc Chem Res 2018; 51:1349-1358. [PMID: 29508985 DOI: 10.1021/acs.accounts.7b00629] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Aromaticity, the special energetic stability derived from cyclic [4 n + 2]π-conjugated electronic structures, has been the topic of intense interest in chemistry because it plays a critical role in rationalizing molecular stability, reactivity, and physical/chemical properties. Recently, the pioneering work by Colin Baird on aromaticity reversal, postulating that aromatic (antiaromatic) character in the ground state reverses to antiaromatic (aromatic) character in the lowest excited triplet state, has attracted much scientific attention. The completely reversed aromaticity in the excited state provides direct insight into understanding the photophysical/chemical properties of photoactive materials. In turn, the application of aromatic molecules to photoactive materials has led to numerous studies revealing this aromaticity reversal. However, most studies of excited-state aromaticity have been based on the theoretical point of view. The experimental evaluation of aromaticity in the excited state is still challenging and strenuous because the assessment of (anti)aromaticity with conventional magnetic, energetic, and geometric indices is difficult in the excited state, which practically restricts the extension and application of the concept of excited-state aromaticity. Time-resolved optical spectroscopies can provide a new and alternative avenue to evaluate excited-state aromaticity experimentally while observing changes in the molecular features in the excited states. Time-resolved optical spectroscopies take advantage of ultrafast laser pulses to achieve high time resolution, making them suitable for monitoring ultrafast changes in the excited states of molecular systems. This can provide valuable information for understanding the aromaticity reversal. This Account presents recent breakthroughs in the experimental assessment of excited-state aromaticity and the verification of aromaticity reversal with time-resolved optical spectroscopic measurements. To scrutinize this intriguing and challenging scientific issue, expanded porphyrins have been utilized as the ideal testing platform for investigating aromaticity because they show distinct aromatic and antiaromatic characters with aromaticity-specific spectroscopic features. Expanded porphyrins exhibit perfect aromatic and antiaromatic congener pairs having the same molecular framework but different numbers of π electrons, which facilitates the study of the pure effect of aromaticity by comparative analyses. On the basis of the characteristics of expanded porphyrins, time-resolved electronic and vibrational absorption spectroscopies capture the changes in electronic structure and molecular conformations driven by the change in aromaticity and provide clear evidence for aromaticity reversal in the excited states. The approaches described in this Account pave the way for the development of new and alternative experimental indices for the evaluation of excited-state aromaticity, which will enable overarching and fundamental comprehension of the role of (anti)aromaticity in the stability, dynamics, and reactivity in the excited states with possible implications for practical applications.
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Affiliation(s)
- Juwon Oh
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Young Mo Sung
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Yongseok Hong
- 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
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7
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Naoda K, Shimizu D, Kim JO, Furukawa K, Kim D, Osuka A. Thienylquinonoidal Porphyrins and Hexaphyrins with Singlet Diradical Ground States. Chemistry 2017; 23:8969-8979. [DOI: 10.1002/chem.201701355] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Koji Naoda
- 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
| | - Jun Oh Kim
- Spectroscopy Laboratory for 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
| | - 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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8
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Naoda K, Osuka A. Structural and Aromaticity Control of [34]Octaphyrin(1.1.1.0.1.1.1.0) by Protonation and Deprotonation. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Koji Naoda
- 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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9
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Hong Y, Oh J, Sung YM, Tanaka Y, Osuka A, Kim D. The Extension of Baird's Rule to Twisted Heteroannulenes: Aromaticity Reversal of Singly and Doubly Twisted Molecular Systems in the Lowest Triplet State. Angew Chem Int Ed Engl 2017; 56:2932-2936. [DOI: 10.1002/anie.201611431] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 12/26/2016] [Indexed: 12/30/2022]
Affiliation(s)
- Yongseok Hong
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Juwon Oh
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Young Mo Sung
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Yasuo Tanaka
- Department of Chemistry; Graduated School of Science; Kyoto University; Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry; Graduated School of Science; Kyoto University; Kyoto 606-8502 Japan
| | - Dongho Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
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10
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Hong Y, Oh J, Sung YM, Tanaka Y, Osuka A, Kim D. The Extension of Baird's Rule to Twisted Heteroannulenes: Aromaticity Reversal of Singly and Doubly Twisted Molecular Systems in the Lowest Triplet State. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611431] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yongseok Hong
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Juwon Oh
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Young Mo Sung
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Yasuo Tanaka
- Department of Chemistry; Graduated School of Science; Kyoto University; Kyoto 606-8502 Japan
| | - Atsuhiro Osuka
- Department of Chemistry; Graduated School of Science; Kyoto University; Kyoto 606-8502 Japan
| | - Dongho Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
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Mallick A, Oh J, Majewski MA, Stępień M, Kim D, Rath H. Protonation Dependent Topological Dichotomy of Core Modified Hexaphyrins: Synthesis, Characterization, and Excited State Dynamics. J Org Chem 2016; 82:556-566. [DOI: 10.1021/acs.joc.6b02576] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Abhijit Mallick
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, 2A/2B Raja
S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Juwon Oh
- Department
of Chemistry, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
| | - Marcin A. Majewski
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Marcin Stępień
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Dongho Kim
- Department
of Chemistry, Yonsei University, Seodaemun-gu, Seoul 120-749, Korea
| | - Harapriya Rath
- Department of Inorganic
Chemistry, Indian Association for the Cultivation of Science, 2A/2B Raja
S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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12
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Sung YM, Oh J, Cha WY, Kim W, Lim JM, Yoon MC, Kim D. Control and Switching of Aromaticity in Various All-Aza-Expanded Porphyrins: Spectroscopic and Theoretical Analyses. Chem Rev 2016; 117:2257-2312. [DOI: 10.1021/acs.chemrev.6b00313] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Young Mo Sung
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Juwon Oh
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Won-Young Cha
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Woojae Kim
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
| | - Jong Min Lim
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
- Physical
and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Min-Chul Yoon
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
- Manufacturing
Engineering Team, Memory Manufacturing Operation Center, Samsung Electronics, Samsungjeonja-ro 1, Hwasung-si, Gyeonggi-do 18448, South Korea
| | - Dongho Kim
- Spectroscopy
Laboratory for Functional π-Electronic Systems and Department
of Chemistry, Yonsei University, Seoul 120-749, South Korea
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Abstract
The use of cyclic polyene perimeter-model approaches, such as Gouterman's four-orbital model and Michl's perimeter model, to analyze trends in the electronic structures and optical properties of expanded, contracted, and isomeric porphyrins is described with an emphasis on the use of magnetic circular dichroism (MCD) spectroscopy to validate the results of TD-DFT calculations. Trends in the electronic structures and optical properties of isomeric porphyrins are examined by comparing the properties of porphycenes, corrphycenes, hemiporphycenes, isoporphycenes, N-confused and neoconfused porphyrins, and norroles, whereas those of ring-contracted porphyrins are examined by comparing the properties of subporphyrins, triphyrins, and vacataporphyrins. The ring-expanded compounds that are examined include cyclo[n]pyrroles, [22]pentaphyrins(1.1.1.1.1), sapphyrins, smaragdyrins, isosmaragdyrins, orangarins, ozaphyrins, [26]hexaphyrins(1.1.1.1.1.1), rubyrins, rosarins, amethyrins, isoamethyrins, bronzaphyrins, and doubly N-confused hexaphyrins.
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Affiliation(s)
- John Mack
- Department of Chemistry, Rhodes University , Grahamstown 6140, South Africa
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14
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Mallick A, Oh J, Kim D, Rath H. Aromatic Fused [30] Heteroannulenes with NIR Absorption and NIR Emission: Synthesis, Characterization, and Excited-State Dynamics. Chemistry 2016; 22:8026-31. [DOI: 10.1002/chem.201600917] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Indexed: 01/07/2023]
Affiliation(s)
- Abhijit Mallick
- Department of Inorganic Chemistry; Indian Association for the Cultivation of Science; 2A/2B Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India), Fax
| | - Juwon Oh
- Department of Chemistry; Yonsei University, Seodaemun-gu; Seoul 120-749 Korea
| | - Dongho Kim
- Department of Chemistry; Yonsei University, Seodaemun-gu; Seoul 120-749 Korea
| | - Harapriya Rath
- Department of Inorganic Chemistry; Indian Association for the Cultivation of Science; 2A/2B Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India), Fax
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Cha WY, Soya T, Tanaka T, Mori H, Hong Y, Lee S, Park KH, Osuka A, Kim D. Multifaceted [36]octaphyrin(1.1.1.1.1.1.1.1): deprotonation-induced switching among nonaromatic, Möbius aromatic, and Hückel antiaromatic species. Chem Commun (Camb) 2016; 52:6076-8. [DOI: 10.1039/c6cc02051h] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Deprotonation of a nonaromatic octaphyrin with TBAF affords a monoanionic twisted Möbius aromatic species or a dianionic square Hückel antiaromatic species, depending upon the amount of TBAF.
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Affiliation(s)
- Won-Young Cha
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Takanori Soya
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto
- Japan
| | - Takayuki Tanaka
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto
- Japan
| | - Hirotaka Mori
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto
- Japan
| | - Yongseok Hong
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Sangsu Lee
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Kyu Hyung Park
- 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
- Kyoto
- Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
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