1
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Trindade GF, Sul S, Kim J, Havelund R, Eyres A, Park S, Shin Y, Bae HJ, Sung YM, Matjacic L, Jung Y, Won J, Jeon WS, Choi H, Lee HS, Lee JC, Kim JH, Gilmore IS. Direct identification of interfacial degradation in blue OLEDs using nanoscale chemical depth profiling. Nat Commun 2023; 14:8066. [PMID: 38052834 DOI: 10.1038/s41467-023-43840-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 11/21/2023] [Indexed: 12/07/2023] Open
Abstract
Understanding the degradation mechanism of organic light-emitting diodes (OLED) is essential to improve device performance and stability. OLED failure, if not process-related, arises mostly from chemical instability. However, the challenges of sampling from nanoscale organic layers and interfaces with enough analytical information has hampered identification of degradation products and mechanisms. Here, we present a high-resolution diagnostic method of OLED degradation using an Orbitrap mass spectrometer equipped with a gas cluster ion beam to gently desorb nanometre levels of materials, providing unambiguous molecular information with 7-nm depth resolution. We chemically depth profile and analyse blue phosphorescent and thermally-activated delayed fluorescent (TADF) OLED devices at different degradation levels. For OLED devices with short operational lifetimes, dominant chemical degradation mainly relate to oxygen loss of molecules that occur at the interface between emission and electron transport layers (EML/ETL) where exciton distribution is maximised, confirmed by emission zone measurements. We also show approximately one order of magnitude increase in lifetime of devices with slightly modified host materials, which present minimal EML/ETL interfacial degradation and show the method can provide insight for future material and device architecture development.
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Affiliation(s)
| | - Soohwan Sul
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Joonghyuk Kim
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Rasmus Havelund
- National Physical Laboratory, NiCE-MSI, Teddington, TW11 0LW, UK
| | - Anya Eyres
- National Physical Laboratory, NiCE-MSI, Teddington, TW11 0LW, UK
| | - Sungjun Park
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Youngsik Shin
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Hye Jin Bae
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Young Mo Sung
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Lidija Matjacic
- National Physical Laboratory, NiCE-MSI, Teddington, TW11 0LW, UK
| | - Yongsik Jung
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Jungyeon Won
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Woo Sung Jeon
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Hyeonho Choi
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Hyo Sug Lee
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Jae-Cheol Lee
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
- Korea Research Institute of Material Property Analysis (KRIMPA), 712, Nongseo-dong 455, Yongin, 17111, Republic of Korea
| | - Jung-Hwa Kim
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea.
| | - Ian S Gilmore
- National Physical Laboratory, NiCE-MSI, Teddington, TW11 0LW, UK.
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Sung YM, Kim TG, Yun DJ, Chae BG, Park H, Lee HS, Kim JH, Jun S, Sul S. Effect of trifluoroacetic acid on InP/ZnSe/ZnS quantum dots: mimicking the surface trap and their effects on the photophysical properties. RSC Adv 2023; 13:28160-28164. [PMID: 37753393 PMCID: PMC10518562 DOI: 10.1039/d3ra05441a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 09/18/2023] [Indexed: 09/28/2023] Open
Abstract
Understanding the precise effects of defects on the photophysical properties of quantum dots (QDs) is essential to their development with near-unity luminescence. Because of the complicated nature of defects in QDs, the origins and detailed roles of the defects still remain rarely understood. In this regard, we used detailed chemical analysis to investigate the effect of surface defects on the optical properties of InP/ZnSe/ZnS QDs by introducing shell defects through controlled trifluoroacetic acid (TFA) etching. TFA treatment on the InP/ZnSe/ZnS QDs partially removed the ZnS shell as well as ligands and reduced the quantum yield by generating energetically deep surface traps. The surface defects of QDs by TFA cause charged trap sites inducing an Auger recombination process with a rate of ca. 200 ps. Based on these results, we proposed possible trap-assisted non-radiative decay pathways between the band-edge state and surface deep traps in InP/ZnSe/ZnS QDs.
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Affiliation(s)
- Young Mo Sung
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Tae-Gon Kim
- Organic Materials Lab, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Dong-Jin Yun
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Byeong Gyu Chae
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Hyokeun Park
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Hyo Sug Lee
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Jung-Hwa Kim
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Shinae Jun
- Organic Materials Lab, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
| | - Soohwan Sul
- Analytical Engineering Group, Samsung Advanced Institute of Technology 130, Samsung-ro, Yeongtong-gu Suwon-si Gyeonggi-do 16678 South Korea
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3
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Park B, Park WW, Choi JY, Choi W, Sung YM, Sul S, Kwon OH, Song H. Pt cocatalyst morphology on semiconductor nanorod photocatalysts enhances charge trapping and water reduction. Chem Sci 2023; 14:7553-7558. [PMID: 37449064 PMCID: PMC10337723 DOI: 10.1039/d3sc01429k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 06/13/2023] [Indexed: 07/18/2023] Open
Abstract
In photocatalysis, metal-semiconductor hybrid structures have been proposed for ideal photocatalytic systems. In this study, we investigate the effect of morphology and surface nature of Pt cocatalysts on photocatalytic hydrogen evolution activity in Pt-tipped CdSe nanorods. Three distinct morphologies of Pt cocatalysts were synthesized and employed as visible light photocatalysts. The rough tips exhibit the highest activity, followed by the round and cubic tips. Kinetic investigations using transient absorption spectroscopy reveal that the cubic tips exhibit lower charge-separated states feasible for reacting with water and water reduction rates due to their defectless surface facets. In contrast, the rough tips show a similar charge-separation value but a two-fold higher surface reaction rate than the round tips, resulting in a significant enhancement of hydrogen evolution. These findings highlight the importance of rational design on metal cocatalysts in addition to the main semiconductor bodies for maximizing photocatalytic activities.
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Affiliation(s)
- Bumjin Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Won-Woo Park
- Department of Chemistry, Ulsan National Institute of Science and Technology Ulsan 44919 Republic of Korea
| | - Ji Yong Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Woong Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
| | - Young Mo Sung
- Analytical Engineering Group, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd Suwon 16678 Republic of Korea
| | - Soohwan Sul
- Analytical Engineering Group, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd Suwon 16678 Republic of Korea
| | - Oh-Hoon Kwon
- Department of Chemistry, Ulsan National Institute of Science and Technology Ulsan 44919 Republic of Korea
| | - Hyunjoon Song
- Department of Chemistry, Korea Advanced Institute of Science and Technology Daejeon 34141 Republic of Korea
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4
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Sung YM, Kwon ES, Maruyama YM, Shin Y, Ihn SG, Kim JS, Choi H, Lee HS, Kim JH, Kim J, Sul S. Probing twisted intramolecular charge transfer of pyrene derivatives as organic emitters in OLEDs. Phys Chem Chem Phys 2022; 24:21995-21999. [DOI: 10.1039/d2cp01394k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Intramolecular charge transfer (ICT) plays a critical role in determining the photophysical properties of organic molecules, including their luminescence efficiencies. Twisted intramolecular charge transfer (TICT) is a process in which...
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Sung YM, Kim TG, Yun DJ, Lim M, Ko DS, Jung C, Won N, Park S, Jeon WS, Lee HS, Kim JH, Jun S, Sul S, Hwang S. Increasing the Energy Gap between Band-Edge and Trap States Slows Down Picosecond Carrier Trapping in Highly Luminescent InP/ZnSe/ZnS Quantum Dots. Small 2021; 17:e2102792. [PMID: 34636144 DOI: 10.1002/smll.202102792] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Non-toxic InP-based nanocrystals have been developed for promising candidates for commercial optoelectronic applications and they still require further improvement on photophysical properties, compared to Cd-based quantum dots (QDs), for better device efficiency and long-term stability. It is, therefore, essential to understand the precise mechanism of carrier trapping even in the state-of-the-art InP-based QD with near-unity luminescence. Here, it is shown that using time-resolved spectroscopic measurements of systematically size-controlled InP/ZnSe/ZnS core/shell/shell QDs with the quantum yield close to one, carrier trapping decreases with increasing the energy difference between band-edge and trap states, indicating that the process follows the energy gap law, well known in molecular photochemistry for nonradiative internal conversion between two electronic states. Similar to the molecular view of the energy gap law, it is found that the energy gap between the band-edge and trap states is closely associated with ZnSe phonons that assist carrier trapping into defects in highly luminescent InP/ZnSe/ZnS QDs. These findings represent a striking departure from the generally accepted view of carrier trapping mechanism in QDs in the Marcus normal region, providing a step forward understanding how excitons in nanocrystals interact with traps, and offering valuable guidance for making highly efficient and stable InP-based QDs.
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Affiliation(s)
- Young Mo Sung
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Tae-Gon Kim
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Dong-Jin Yun
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Mihye Lim
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Dong-Su Ko
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Changhoon Jung
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Nayoun Won
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Sungjun Park
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Woo Sung Jeon
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Hyo Sug Lee
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Jung-Hwa Kim
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Shinae Jun
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Soohwan Sul
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
| | - Sungwoo Hwang
- Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., 130 Samsung-ro, Suwon, 16678, Republic of Korea
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6
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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: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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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] [What about the content of this article? (0)] [Affiliation(s)] [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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8
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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9
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Sung YM, Sprutta N, Kim JO, Koo YH, Latos-Grażyński L, Kim D. Retrieving aromaticity of dithiadiazuliporphyrin by oxidation: illustration by experimental and theoretical investigation. RSC Adv 2017. [DOI: 10.1039/c7ra02458d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The photophysical properties of neutral, monocation radical, and dication of dithiadiazuliporphyrin have been examined with a particular focus on their aromaticity.
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Affiliation(s)
- Young Mo Sung
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | | | - Jun Oh Kim
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Yun Hee Koo
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | | | - Dongho Kim
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
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10
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Yim D, Sung J, Kim S, Oh J, Yoon H, Sung YM, Kim D, Jang WD. Guest-Induced Modulation of the Energy Transfer Process in Porphyrin-Based Artificial Light Harvesting Dendrimers. J Am Chem Soc 2016; 139:993-1002. [DOI: 10.1021/jacs.6b11804] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Dajeong Yim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Jooyoung Sung
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Serom Kim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Juwon Oh
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Hongsik Yoon
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Young Mo Sung
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Dongho Kim
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University , 50 Yonsei-ro, Seodaemoon-Gu, Seoul 120-749, Korea
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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12
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Sung YM, Oh J, Naoda K, Lee T, Kim W, Lim M, Osuka A, Kim D. Inside Cover: A Description of Vibrational Modes in Hexaphyrins: Understanding the Aromaticity Reversal in the Lowest Triplet State (Angew. Chem. Int. Ed. 39/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201606588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Young Mo Sung
- 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
| | - Koji Naoda
- Department of Chemistry, Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Taegon Lee
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 609-735 Korea
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-electronic systems and Department of Chemistry Yonsei University Seoul 120-749 Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 609-735 Korea
| | - 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 120-749 Korea
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Sung YM, Oh J, Naoda K, Lee T, Kim W, Lim M, Osuka A, Kim D. Innentitelbild: A Description of Vibrational Modes in Hexaphyrins: Understanding the Aromaticity Reversal in the Lowest Triplet State (Angew. Chem. 39/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Young Mo Sung
- 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
| | - Koji Naoda
- Department of Chemistry, Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan
| | - Taegon Lee
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 609-735 Korea
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-electronic systems and Department of Chemistry Yonsei University Seoul 120-749 Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University Busan 609-735 Korea
| | - 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 120-749 Korea
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14
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Ishida M, Omagari T, Hirosawa R, Jono K, Sung YM, Yasutake Y, Uno H, Toganoh M, Nakanotani H, Fukatsu S, Kim D, Furuta H. Boron Difluoride Complexes of Expanded N-Confused Calix[n]phyrins That Demonstrate Unique Luminescent and Lasing Properties. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606246] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Masatoshi Ishida
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Toshihiro Omagari
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Ryuji Hirosawa
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Keisuke Jono
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Young Mo Sung
- Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Yuhsuke Yasutake
- Graduate School of Arts and Sciences; The University of Tokyo; Tokyo 153-8902 Japan
| | - Hidemitsu Uno
- Graduate School of Science and Engineering; Ehime University; Matsuyama 790-8577 Japan
| | - Motoki Toganoh
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Hajime Nakanotani
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Susumu Fukatsu
- Graduate School of Arts and Sciences; The University of Tokyo; Tokyo 153-8902 Japan
| | - Dongho Kim
- Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - 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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15
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Ishida M, Omagari T, Hirosawa R, Jono K, Sung YM, Yasutake Y, Uno H, Toganoh M, Nakanotani H, Fukatsu S, Kim D, Furuta H. Boron Difluoride Complexes of Expanded N-Confused Calix[n]phyrins That Demonstrate Unique Luminescent and Lasing Properties. Angew Chem Int Ed Engl 2016; 55:12045-9. [DOI: 10.1002/anie.201606246] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Masatoshi Ishida
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Toshihiro Omagari
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Ryuji Hirosawa
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Keisuke Jono
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Young Mo Sung
- Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Yuhsuke Yasutake
- Graduate School of Arts and Sciences; The University of Tokyo; Tokyo 153-8902 Japan
| | - Hidemitsu Uno
- Graduate School of Science and Engineering; Ehime University; Matsuyama 790-8577 Japan
| | - Motoki Toganoh
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Hajime Nakanotani
- Department of Chemistry and Biochemistry; Graduate School of Engineering and Center for Molecular Systems; Kyushu University; Fukuoka 819-0395 Japan
| | - Susumu Fukatsu
- Graduate School of Arts and Sciences; The University of Tokyo; Tokyo 153-8902 Japan
| | - Dongho Kim
- Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - 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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16
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Sung YM, Oh J, Naoda K, Lee T, Kim W, Lim M, Osuka A, Kim D. A Description of Vibrational Modes in Hexaphyrins: Understanding the Aromaticity Reversal in the Lowest Triplet State. Angew Chem Int Ed Engl 2016; 55:11930-4. [DOI: 10.1002/anie.201603631] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Young Mo Sung
- 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
| | - Koji Naoda
- Department of Chemistry, Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Taegon Lee
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 609-735 Korea
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-electronic systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 609-735 Korea
| | - 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 120-749 Korea
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17
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Sung YM, Oh J, Naoda K, Lee T, Kim W, Lim M, Osuka A, Kim D. A Description of Vibrational Modes in Hexaphyrins: Understanding the Aromaticity Reversal in the Lowest Triplet State. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603631] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Young Mo Sung
- 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
| | - Koji Naoda
- Department of Chemistry, Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Taegon Lee
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 609-735 Korea
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-electronic systems and Department of Chemistry; Yonsei University; Seoul 120-749 Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 609-735 Korea
| | - 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 120-749 Korea
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18
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Oh J, Sung YM, Kim W, Mori S, Osuka A, Kim D. Back Cover: Aromaticity Reversal in the Lowest Excited Triplet State of Archetypical Möbius Heteroannulenic Systems (Angew. Chem. Int. Ed. 22/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/anie.201603085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- 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
| | - Woojae Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Shigeki Mori
- 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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19
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Oh J, Sung YM, Kim W, Mori S, Osuka A, Kim D. Rücktitelbild: Aromaticity Reversal in the Lowest Excited Triplet State of Archetypical Möbius Heteroannulenic Systems (Angew. Chem. 22/2016). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- 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
| | - Woojae Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Shigeki Mori
- 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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20
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Oh J, Sung YM, Kim W, Mori S, Osuka A, Kim D. Aromaticity Reversal in the Lowest Excited Triplet State of Archetypical Möbius Heteroannulenic Systems. Angew Chem Int Ed Engl 2016; 55:6487-91. [DOI: 10.1002/anie.201602083] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Revised: 03/22/2016] [Indexed: 01/13/2023]
Affiliation(s)
- 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
| | - Woojae Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Shigeki Mori
- 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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21
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Oh J, Sung YM, Kim W, Mori S, Osuka A, Kim D. Aromaticity Reversal in the Lowest Excited Triplet State of Archetypical Möbius Heteroannulenic Systems. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602083] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- 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
| | - Woojae Kim
- Department of Chemistry; Spectroscopy Laboratory for Functional π-Electronic Systems; Yonsei University; Seoul 120-749 Korea
| | - Shigeki Mori
- 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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22
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Oh J, Mori H, Sung YM, Kim W, Osuka A, Kim D. Switchable π-electronic network of bis(α-oligothienyl)-substituted hexaphyrins between helical versus rectangular circuit. Chem Sci 2015; 7:2239-2245. [PMID: 29910912 PMCID: PMC5977443 DOI: 10.1039/c5sc04263a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 12/03/2015] [Indexed: 11/21/2022] Open
Abstract
The switching phenomena of conformation with π-electronic network through deprotonation–protonation processes were investigated by employing a series of 5,20-bis(α-oligothienyl) substituted hexaphyrins(1.1.1.1.1.1).
The switching phenomena of conformation with π-electronic network through deprotonation–protonation processes were investigated by employing a series of 5,20-bis(α-oligothienyl) substituted hexaphyrins(1.1.1.1.1.1). They showed significant changes in the absorption and emission spectra with deprotonation, and returned to the initial state with protonation. Through NMR measurements and single crystal X-ray diffraction analysis, we found that the 5,20-bis(α-oligothienyl) substituted hexaphyrins, which possess acyclic, helical electronic networks involving oligothienyl chains in dumbbell conformations (type-I) in a neutral form, underwent effective deprotonation upon treatment with tetrabutylammonium fluoride (TBAF) to generate the corresponding dianions, which display cyclic electronic networks with enhanced aromaticity in rectangular conformations (type-II). Our quantum calculation results provide an unambiguous description for the switchable conformation and π-conjugation, which revealed that a deprotonation-induced enhanced aromatic conjugation pathway is involved in the switchable π-electronic network.
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Affiliation(s)
- Juwon Oh
- Spectroscopy Laboratory for Functional π-Electronic Systems , Department of Chemistry , Yonsei University , 50 Yonsei-ro , Seoul 120-749 , Korea .
| | - Hirotaka Mori
- Department of Chemistry , Graduated School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 , Japan .
| | - Young Mo Sung
- Spectroscopy Laboratory for Functional π-Electronic Systems , Department of Chemistry , Yonsei University , 50 Yonsei-ro , Seoul 120-749 , Korea .
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems , Department of Chemistry , Yonsei University , 50 Yonsei-ro , Seoul 120-749 , Korea .
| | - Atsuhiro Osuka
- Department of Chemistry , Graduated School of Science , Kyoto University , Sakyo-ku , Kyoto 606-8502 , Japan .
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems , Department of Chemistry , Yonsei University , 50 Yonsei-ro , Seoul 120-749 , Korea .
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23
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Jiang HW, Tanaka T, Kim T, Sung YM, Mori H, Kim D, Osuka A. Synthesis of [n]Cyclo-5,15-porphyrinylene-4,4′-biphenylenes Displaying Size-Dependent Excitation-Energy Hopping. Angew Chem Int Ed Engl 2015; 54:15197-201. [DOI: 10.1002/anie.201507822] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Indexed: 11/08/2022]
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24
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Jiang HW, Tanaka T, Kim T, Sung YM, Mori H, Kim D, Osuka A. Synthesis of [n]Cyclo-5,15-porphyrinylene-4,4′-biphenylenes Displaying Size-Dependent Excitation-Energy Hopping. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507822] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Sung YM, Oh J, Kim W, Mori H, Osuka A, Kim D. Switching between Aromatic and Antiaromatic 1,3-Phenylene-Strapped [26]- and [28]Hexaphyrins upon Passage to the Singlet Excited State. J Am Chem Soc 2015; 137:11856-9. [PMID: 26340352 DOI: 10.1021/jacs.5b04047] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have demonstrated aromaticity reversal in the singlet excited states of internally 1,3-phenylene-strapped [26]- and [28]hexaphyrins (P26H and P28H). P26H displays a broad and reduced singlet-excited-state absorption spectrum, whereas P28H exhibits a sharp and intense singlet-excited-state absorption spectrum; both are in contrast to the ground-state absorption spectra, strongly indicating aromaticity reversal in the singlet excited state. Furthermore, magnetic and topological indices of aromaticity such as nucleus-independent chemical shift and harmonic oscillator model of aromaticity values for P26H and P28H also suggest that their singlet excited states become antiaromatic and aromatic, respectively.
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Affiliation(s)
- Young Mo Sung
- 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
| | - Woojae Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 120-749, Korea
| | - Hirotaka Mori
- 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
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems and Department of Chemistry, Yonsei University , Seoul 120-749, Korea
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26
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Huang W, Lee SK, Sung YM, Peng F, Yin B, Ma M, Chen B, Liu S, Kirk SR, Kim D, Song J. Azobenzene-Bridged Porphyrin Nanorings: Syntheses, Structures, and Photophysical Properties. Chemistry 2015; 21:15328-38. [DOI: 10.1002/chem.201502296] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Indexed: 01/28/2023]
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27
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Oh J, Yoon H, Sung YM, Kang P, Choi MG, Jang WD, Kim D. Modulation of Axial-Ligand Binding and Releasing Processes onto the Triazole-Bearing Nickel(II) Picket-Fence Porphyrins: Steric Repulsion versus Hydrogen-Bonding Effects. J Phys Chem B 2015; 119:7053-61. [DOI: 10.1021/acs.jpcb.5b03033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Juwon Oh
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Hongsik Yoon
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Young Mo Sung
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Philjae Kang
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Moon-Gun Choi
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Woo-Dong Jang
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Dongho Kim
- Spectroscopy
Laboratory for Functional π-Electronic Systems
and Department of Chemistry, ‡Biopolymer Laboratory and Department of Chemistry, and §Molecular Structure
Laboratory and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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28
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Fimmel B, Son M, Sung YM, Grüne M, Engels B, Kim D, Würthner F. Phenylene Ethynylene-Tethered Perylene Bisimide Folda-Dimer and Folda-Trimer: Investigations on Folding Features in Ground and Excited States. Chemistry 2014; 21:615-30. [DOI: 10.1002/chem.201405231] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 11/10/2022]
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29
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Yoneda T, Sung YM, Lim JM, Kim D, Osuka A. PdIIComplexes of [44]- and [46]Decaphyrins: The Largest Hückel Aromatic and Antiaromatic, and Möbius Aromatic Macrocycles. Angew Chem Int Ed Engl 2014; 53:13169-73. [DOI: 10.1002/anie.201408506] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Indexed: 11/12/2022]
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30
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Yoneda T, Sung YM, Lim JM, Kim D, Osuka A. PdIIComplexes of [44]- and [46]Decaphyrins: The Largest Hückel Aromatic and Antiaromatic, and Möbius Aromatic Macrocycles. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408506] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Davis CM, Lim JM, Larsen KR, Kim DS, Sung YM, Lyons DM, Lynch VM, Nielsen KA, Jeppesen JO, Kim D, Park JS, Sessler JL. Ion-Regulated Allosteric Binding of Fullerenes (C60 and C70) by Tetrathiafulvalene-Calix[4]pyrroles. J Am Chem Soc 2014; 136:10410-7. [DOI: 10.1021/ja504077f] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Christina M. Davis
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street-Stop A5300, Austin, Texas 78712-1224, United States
| | - Jong Min Lim
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Karina R. Larsen
- Department
of Physics, Chemistry, and Pharmacy, University of Southern Denmark, 5320 Odense M, Denmark
| | - Dong Sub Kim
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street-Stop A5300, Austin, Texas 78712-1224, United States
| | - Young Mo Sung
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Dani M. Lyons
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street-Stop A5300, Austin, Texas 78712-1224, United States
| | - Vincent M. Lynch
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street-Stop A5300, Austin, Texas 78712-1224, United States
| | - Kent A. Nielsen
- Department
of Physics, Chemistry, and Pharmacy, University of Southern Denmark, 5320 Odense M, Denmark
| | - Jan O. Jeppesen
- Department
of Physics, Chemistry, and Pharmacy, University of Southern Denmark, 5320 Odense M, Denmark
| | - Dongho Kim
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Jung Su Park
- Department
of Chemistry, Sookmyung Women’s University, Seoul 140-742, Korea
| | - Jonathan L. Sessler
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street-Stop A5300, Austin, Texas 78712-1224, United States
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
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32
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Ho IT, Zhang Z, Ishida M, Lynch VM, Cha WY, Sung YM, Kim D, Sessler JL. A Hybrid Macrocycle with a Pyridine Subunit Displays Aromatic Character upon Uranyl Cation Complexation. J Am Chem Soc 2014; 136:4281-6. [DOI: 10.1021/ja412520g] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- I-Ting Ho
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224 United States
| | - Zhan Zhang
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224 United States
| | - Masatoshi Ishida
- Education
Center for Global Leaders in Molecular Systems for Devices, Kyushu University, Fukuoka 819-0395, Japan
| | - Vincent M. Lynch
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224 United States
| | - Won-Young Cha
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Young Mo Sung
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Dongho Kim
- Department
of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Jonathan L. Sessler
- Department
of Chemistry, The University of Texas at Austin, 105 East 24th
Street, Stop A5300, Austin, Texas 78712-1224 United States
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33
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Fukuoka T, Uchida K, Sung YM, Shin JY, Ishida S, Lim JM, Hiroto S, Furukawa K, Kim D, Iwamoto T, Shinokubo H. Near-IR Absorbing Nickel(II) Porphyrinoids Prepared by Regioselective Insertion of Silylenes into Antiaromatic Nickel(II) Norcorrole. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309921] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Fukuoka T, Uchida K, Sung YM, Shin JY, Ishida S, Lim JM, Hiroto S, Furukawa K, Kim D, Iwamoto T, Shinokubo H. Near-IR Absorbing Nickel(II) Porphyrinoids Prepared by Regioselective Insertion of Silylenes into Antiaromatic Nickel(II) Norcorrole. Angew Chem Int Ed Engl 2014; 53:1506-9. [DOI: 10.1002/anie.201309921] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Indexed: 11/06/2022]
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35
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Son M, Sung YM, Tokuji S, Fukui N, Yorimitsu H, Osuka A, Kim D. Control of the conformational dynamics of meso–meso vinylene-bridged Zn(ii) porphyrin dimers through diamine coordination. Chem Commun (Camb) 2014; 50:3078-80. [DOI: 10.1039/c4cc00126e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two meso–meso vinylene-bridged Zn(ii) porphyrin dimers 1 and 2 were analyzed in terms of the control of their conformational dynamics induced by the rotation around the double bond bridge.
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Affiliation(s)
- Minjung Son
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | - Young Mo Sung
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | - Sumito Tokuji
- Department of Chemistry and Graduate School of Science
- Kyoto University
- Kyoto 606-8502, Japan
| | - Norihito Fukui
- Department of Chemistry and Graduate School of Science
- Kyoto University
- Kyoto 606-8502, Japan
| | - Hideki Yorimitsu
- Department of Chemistry and Graduate School of Science
- Kyoto University
- Kyoto 606-8502, Japan
| | - Atsuhiro Osuka
- Department of Chemistry and Graduate School of Science
- Kyoto University
- Kyoto 606-8502, Japan
| | - Dongho Kim
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
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36
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Sung YM, Szyszko B, Myśliborski R, Stępień M, Oh J, Son M, Latos-Grażyński L, Kim D. The effect of π-conjugation in the macrocyclic ring on the photophysical properties of a series of thiaaceneporphyrinoids. Chem Commun (Camb) 2014; 50:8367-9. [DOI: 10.1039/c4cc03855j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In a series of thiaaceneporphyrinoids, their conformers exhibit macrocyclic π-conjugation pathways controlled by a dihedral angle between the porphyrin framework and acene planes.
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Affiliation(s)
- Young Mo Sung
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | | | | | - Marcin Stępień
- Department of Chemistry
- University of Wrocław
- Wrocław, Poland
| | - Juwon Oh
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | - Minjung Son
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | | | - Dongho Kim
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
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37
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Bill NL, Ishida M, Kawashima Y, Ohkubo K, Sung YM, Lynch VM, Lim JM, Kim D, Sessler JL, Fukuzumi S. Long-lived charge-separated states produced in supramolecular complexes between anionic and cationic porphyrins. Chem Sci 2014. [DOI: 10.1039/c4sc00803k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Photoinduced electron transfer in a porphyrin supramolecule occurs to produce an 83 ms CS state.
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Affiliation(s)
- Nathan L. Bill
- Department of Chemistry
- The University of Texas at Austin
- Austin, USA
| | - Masatoshi Ishida
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
- Education Centre for Global Leaders in Molecular Systems for Devices
- Kyushu University
| | - Yuki Kawashima
- Department of Material and Life Science
- Graduate School of Engineering
- Osaka University
- Suita, Japan
| | - Kei Ohkubo
- Department of Material and Life Science
- Graduate School of Engineering
- Osaka University
- Suita, Japan
| | - Young Mo Sung
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | - Vincent M. Lynch
- Department of Chemistry
- The University of Texas at Austin
- Austin, USA
| | - Jong Min Lim
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | - Dongho Kim
- Department of Chemistry
- Yonsei University
- Seoul 120-749, Korea
| | | | - Shunichi Fukuzumi
- Department of Material and Life Science
- Graduate School of Engineering
- Osaka University
- Suita, Japan
- Department of Bioinspired Chemistry (WCU)
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38
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Lim JM, Ganesan K, Sung YM, Srinivasan A, Chandrashekar TK, Kim D. Photophysical properties of bridged core-modified hexaphyrins: conjugational perturbation of thiophene bridges. Chem Commun (Camb) 2014; 50:4358-60. [DOI: 10.1039/c4cc00309h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of thiophene bridges in determining the photophysical properties of bridged core-modified hexaphyrins is investigated.
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Affiliation(s)
- Jong Min Lim
- Department of Chemistry
- Yonsei University
- Seodaemoon-gu, Korea
| | - Karthik Ganesan
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Odisha, India
| | - Young Mo Sung
- Department of Chemistry
- Yonsei University
- Seodaemoon-gu, Korea
| | - Alagar Srinivasan
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- Odisha, India
| | | | - Dongho Kim
- Department of Chemistry
- Yonsei University
- Seodaemoon-gu, Korea
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39
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Zeng W, Ishida M, Lee S, Sung YM, Zeng Z, Ni Y, Chi C, Kim D, Wu J. A
p
‐Quinodimethane‐Bridged Porphyrin Dimer. Chemistry 2013; 19:16814-24. [DOI: 10.1002/chem.201302023] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/02/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Wangdong Zeng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 (Singapore), Fax: (+65) 6779‐1691
| | - Masatoshi Ishida
- Department of Chemistry, Yonsei University, Seoul 120‐749 (Korea), Fax: (+82) 2‐2123‐2434
| | - Sangsu Lee
- Department of Chemistry, Yonsei University, Seoul 120‐749 (Korea), Fax: (+82) 2‐2123‐2434
| | - Young Mo Sung
- Department of Chemistry, Yonsei University, Seoul 120‐749 (Korea), Fax: (+82) 2‐2123‐2434
| | - Zebing Zeng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 (Singapore), Fax: (+65) 6779‐1691
| | - Yong Ni
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 (Singapore), Fax: (+65) 6779‐1691
| | - Chunyan Chi
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 (Singapore), Fax: (+65) 6779‐1691
| | - Dongho Kim
- Department of Chemistry, Yonsei University, Seoul 120‐749 (Korea), Fax: (+82) 2‐2123‐2434
| | - Jishan Wu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 (Singapore), Fax: (+65) 6779‐1691
- Institute of Materials Research and Engineering, A*STAR, 3 Research Link, 117602 (Singapore)
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40
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Moon BH, Chaoumead A, Sung YM. Fundamental electrochemiluminescence characteristics of fluorine-doped tin oxides synthesized by sol-gel combustion. J Nanosci Nanotechnol 2013; 13:7188-7190. [PMID: 24245225 DOI: 10.1166/jnn.2013.7912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Fluorine-doped tin oxide (FTO) materials synthesized by sol-gel combustion method were investigated for electrochemical luminescence (ECL) application. Effects of sol-gel combustion conditions on the structures and morphology of the porous FTO (p-FTO) materials were studied. ECL efficiency of p-FTO-based cell was about 251 cd/m2 at 4 V bias, which is higher than the sell using only FTO electrodes (102.8 cd/m2). The highest intensity of the emitting light was obtained at the wavelength of about 610 nm. The porous FTO layer was effective for increasing ECL intensities.
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Affiliation(s)
- B H Moon
- Electrical Engineering, Kyungsung University, Busan 608-736, Korea
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41
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Saga S, Hayashi SY, Yoshida K, Tsurumaki E, Kim P, Sung YM, Sung J, Tanaka T, Kim D, Osuka A. Subporphyrins with an axial B-C bond. Chemistry 2013; 19:11158-61. [PMID: 23857881 DOI: 10.1002/chem.201302454] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Indexed: 11/09/2022]
Abstract
Axial fabrications of subporphyrins have been conveniently accomplished by the reaction of B(methoxo)triphenylsubporphyrin with Grignard reagents such as aryl-, heteroaryl-, ferrocenyl-, β-styryl-, phenylethynyl-, and ethylmagnesium bromides. The axial groups thus introduced are not conjugated with the subporphyrin core. This situation leads to effective fluorescence quenching of subporphyrins when the axial group is strongly electron donating such as 4-dimethylaminophenyl and ferrocenyl groups.
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Affiliation(s)
- Shun Saga
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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42
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Sung YM. 1074Myocardial T1 and T2 Mappings with Automatic Motion
Correction at 3 Tesla MR: Comparison of T1 and T2 Measurements by Breathhold,
Free-Breathing and Cardiac Cycle. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet070bn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Sung YM. 1075Shortened Modified Look-Locker Inversion Recovery for
Myocardial T1 Mapping in Healthy Volunteers: Determination of Reference T1
Relaxation Times at 3 Tesla MR According to Different Contrast Injection
Methods. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet070l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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44
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Zeng Z, Ishida M, Zafra JL, Zhu X, Sung YM, Bao N, Webster RD, Lee BS, Li RW, Zeng W, Li Y, Chi C, López Navarrete JT, Ding J, Casado J, Kim D, Wu J. Pushing extended p-quinodimethanes to the limit: stable tetracyano-oligo(N-annulated perylene)quinodimethanes with tunable ground states. J Am Chem Soc 2013; 135:6363-71. [PMID: 23560651 DOI: 10.1021/ja402467y] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
p-Quinodimethane (p-QDM) is a fundamental building block for the design of π-conjugated systems with low band gap and open-shell biradical character. However, synthesis of extended p-QDMs has usually suffered from their intrinsic high reactivity and poor solubility. In this work, benzannulation together with terminal cyano-substitution was demonstrated to be an efficient approach for the synthesis of a series of soluble and stable tetracyano-oligo(N-annulated perylene)quinodimethanes nPer-CN (n = 1-6), with the longest molecule having 12 para-linked benzenoid rings! The geometry and electronic structures of these oligomers were investigated by steady-state and transient absorption spectroscopy, nuclear magnetic resonance, electron spin resonance, superconducting quantum interference device, and FT Raman spectroscopy assisted by density functional theory calculations. They showed tunable ground states, varying from a closed-shell quinoidal structure for monomer, to a singlet biradical for dimer, trimer, and tetramer, and to a triplet biradical for pentamer and hexamer. Large two-photon absorption cross-section values were observed in the near-infrared range, which also exhibited a clear chain-length dependence.
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Affiliation(s)
- Zebing Zeng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
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45
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Jana A, Ishida M, Cho K, Ghosh SK, Kwak K, Ohkubo K, Sung YM, Davis CM, Lynch VM, Lee D, Fukuzumi S, Kim D, Sessler JL. Tetrathiafulvalene-annulated [28]hexaphyrin(1.1.1.1.1.1): a multi-electron donor system subject to conformational control. Chem Commun (Camb) 2013; 49:8937-9. [DOI: 10.1039/c3cc44934c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Sung YM, Vasiliu M, Dixon DA, Bonizzoni M, Kim D, Vaid TP. Electronic structure and photophysics of (CC)tetra-p-tolylporphyrin2+. Photochem Photobiol Sci 2013; 12:1774-9. [DOI: 10.1039/c3pp50155h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Jana A, Ishida M, Kwak K, Sung YM, Kim DS, Lynch VM, Lee D, Kim D, Sessler JL. Comparative electrochemical and photophysical studies of tetrathiafulvalene-annulated porphyrins and their Zn(II) complexes: the effect of metalation and structural variation. Chemistry 2012. [PMID: 23180557 DOI: 10.1002/chem.201202727] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A series of tetrathiafulvalene (TTF)-annulated porphyrins, and their corresponding Zn(II) complexes, have been synthesized. Detailed electrochemical, photophysical, and theoretical studies reveal the effects of intramolecular charge-transfer transitions that originate from the TTF fragments to the macrocyclic core. The incremental synthetic addition of TTF moieties to the porphyrin core makes the species more susceptible to these charge-transfer (CT) effects as evidenced by spectroscopic studies. On the other hand, regular positive shifts in the reduction signals are seen in the square-wave voltammograms as the number of TTF subunits increases. Structural studies that involve the tetrakis-substituted TTF-porphyrin (both free-base and Zn(II) complex) reveal only modest deviations from planarity. The effect of TTF substitution is thus ascribed to electronic overlap between annulated TTF subunits rather than steric effects. The directly linked thiafulvalene subunits function as both π acceptors as well as σ donors. Whereas σ donation accounts for the substituent-dependent charge-transfer transitions, it is the π-acceptor nature of the appended tetrathiafulvalene groups that dominates the redox chemistry. Interactions between the subunits are also reflected in the square-wave voltammograms. In the case of the free-base derivatives that bear multiple TTF subunits, the neighboring TTF units, as well as the TTF(⋅+) generated through one-electron oxidation, can interact with each other; this gives rise to multiple signals in the square-wave voltammograms. On the other hand, after metalation, the electronic communication between the separate TTF moieties becomes restricted and they act as separate redox centers under conditions of oxidation. Thus only two signals, which correspond to TTF(⋅+) and TTF(2+), are observed. The reduction potentials are also seen to shift towards more negative values after metalation, a finding that is considered to reflect an increased HOMO-LUMO gap. To probe the excited-state dynamics and internal CT character, transient absorption spectral studies were performed. These analyses revealed that all the TTF-porphyrins of this study display relatively short excited-state lifetimes, which range from 1 to 20 ps. This reflects a very fast decay to the ground state and is consistent with the proposed intramolecular charge-transfer effects inferred from the ground-state studies. Complementary DFT calculations provide a mechanistic rationale for the electron flow within the TTF-porphyrins and support the proposed intramolecular charge-transfer interactions and π-acceptor effects.
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Affiliation(s)
- Atanu Jana
- Department of Chemistry, Yonsei University, Seoul 120 749, South Korea
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48
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Mori H, Sung YM, Lee BS, Kim D, Osuka A. Antiaromatic Hexaphyrins and Octaphyrins Stabilized by the Hydrogen-Bonding Interactions ofmeso-Imidazolyl Groups. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207212] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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49
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Mori H, Sung YM, Lee BS, Kim D, Osuka A. Antiaromatic Hexaphyrins and Octaphyrins Stabilized by the Hydrogen-Bonding Interactions ofmeso-Imidazolyl Groups. Angew Chem Int Ed Engl 2012; 51:12459-63. [DOI: 10.1002/anie.201207212] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Indexed: 01/13/2023]
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50
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Cha WY, Lim JM, Yoon MC, Sung YM, Lee BS, Katsumata S, Suzuki M, Mori H, Ikawa Y, Furuta H, Osuka A, Kim D. Deprotonation-Induced Aromaticity Enhancement and New Conjugated Networks inmeso-Hexakis(pentafluorophenyl)[26]hexaphyrin. Chemistry 2012; 18:15838-44. [DOI: 10.1002/chem.201200991] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Revised: 07/31/2012] [Indexed: 11/10/2022]
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