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Ravi S, Karthikeyan S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Deep blue emitting dual state fluorescent triphenylamine-dicyclohexylurea derivative: Multi-stimuli responsive fluorescence switching and methanol/water sensing. Spectrochim Acta A Mol Biomol Spectrosc 2024; 315:124303. [PMID: 38636429 DOI: 10.1016/j.saa.2024.124303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 04/10/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
A new deep blue emissive organic fluorophore (N-cyclohexyl-N-(cyclohexylcarbamoyl)-4-(diphenylamino)benzamide (NCDPB)) was designed and synthesized, which showed strong fluorescence both in solution and solid-state. Solid-state structural analysis of NCDPB revealed non-planar twisted molecular conformation with extended hydrogen bonding between the amide functionalities. The propeller shaped triphenylamine (TPA) and non-planar cyclohexyl unit prevented close π…π stacking and produced strong deep blue emission in the solid state (λmax = 400 nm, quantum yield (Φf) = 12.6 %). NCDPB also exhibited strong solvent polarity dependent tunable emission in solution (λmax = 402-462 nm, Φf = 1.15 (compared to quinine sulphate)). NCDPB showed reversible fluorescence switching between two fluorescence states upon mechanical crushing and heating/solvent exposure. Mechanical crushing caused red shifting of fluorescence from 400 to 447 nm and heating/solvent exposure reversed the fluorescence. Further, NCDPB also displayed off-on reversible/self-reversible fluorescence switching upon exposure to trifluoracetic acid (TFA) and NH3. The repeated fluorescence switching cycles indicated high reversibility without any significant change of fluorescence intensity. The drastically different fluorescence of NCDPB in CH3OH and EtOH was utilized to distinguish them and monitor CH3OH contamination in ethanol and benzene. It showed limit of detection (LOD) of methanol up to 0.25 % and 7 % in benzene and ethanol, respectively. The water sensitive fluorescence modulation of NCDPB in organic solvents was used to sensing water contamination in common organic solvents. Thus, integration of twisted TPA with H-bonding urea produced dual state emitting organic fluorophore with multi-responsive fluorescence switching and solvent sensing.
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Affiliation(s)
- Sasikala Ravi
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Subramanian Karthikeyan
- Department of Chemistry, Khadir Mohideen College (Affiliated to Bharathidasan University), Adirampattinam 614701, Tamil Nadu, India
| | - Mehboobali Pannipara
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia; Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G Al-Sehemi
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia; Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Korea.
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2
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Park S, Lee J, Kim B, Jung CY, Bae SE, Kang J, Moon D, Park J. Radical-Driven Crystal-Amorphous-Crystal Transition of a Metal-Organic Framework. J Am Chem Soc 2024; 146:9293-9301. [PMID: 38516847 DOI: 10.1021/jacs.4c01040] [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] [Indexed: 03/23/2024]
Abstract
Self-assembly-based structural transition has been explored for various applications, including molecular machines, sensors, and drug delivery. In this study, we developed new redox-active metal-organic frameworks (MOFs) called DGIST-10 series that comprise π-acidic 1,4,5,8-naphthalenediimide (NDI)-based ligands and Ni2+ ions, aiming to boost ligand-self-assembly-driven structural transition and study the involved mechanism. Notably, during the synthesis of the MOFs, a single-crystal-amorphous-single-crystal structural transition occurred within the MOFs upon radical formation, which was ascribed to the fact that radicals prefer spin-pairing or through-space electron delocalization by π-orbital overlap. The radical-formation-induced structural transitions were further confirmed by the postsynthetic solvothermal treatment of isolated nonradical MOF crystals. Notably, the transient amorphous phase without morphological disintegration was clearly observed, contributing to the seminal structural change of the MOF. We believe that this unprecedented structural transition triggered by the ligand self-assembly magnifies the structural flexibility and diversity of MOFs, which is one of the pivotal aspects of MOFs.
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Affiliation(s)
- Seonghun Park
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Juhyung Lee
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Bongkyeom Kim
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Chan-Yong Jung
- Nuclear Chemistry Technology Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Sang-Eun Bae
- Nuclear Chemistry Technology Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
| | - Joongoo Kang
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory/POSTECH, Pohang 37673, Republic of Korea
| | - Jinhee Park
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
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3
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Ravi S, Priyadharshini P, Deviga G, Mariappan M, Karthikeyan S, Pannipara M, G Al-Sehemi A, Moon D, Philip Anthony S. Water sensitive fluorescence tuning of V-shaped ESIPT fluorophores: Substituent effect and trace amount water sensing in DMSO. Spectrochim Acta A Mol Biomol Spectrosc 2024; 309:123838. [PMID: 38181625 DOI: 10.1016/j.saa.2024.123838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/26/2023] [Accepted: 01/01/2024] [Indexed: 01/07/2024]
Abstract
Highly sensitive nature of excited state intramolecular proton transfer (ESIPT) functionality in organic fluorophores made them potential candidates for developing environmental sensors and bioimaging applications. Herein, we report the synthesis of V-shaped Dapsone based Schiff base ESIPT derivatives (1-3) and water sensitive wide fluorescence tuning from blue to red in DMSO. Solid-state structural analysis confirmed the V-shaped molecular structure with intramolecular H-bonding and substituent dependent molecular packing in the crystal lattice. 1 showed strong solid-state fluorescence (λmax = 554 nm, Φf = 21.2 %) whereas methoxy substitution (2 and 3) produced tunable but significantly reduced fluorescence (λmax = 547 (2) and 615 nm (3), Φf = 2.1 (2) and 6.5 % (3)). Interestingly, aggregation induced emission (AIE) studies in DMSO-water mixture revealed water sensitive fluorescence tuning. The trace amount of water (less than 1 %) in DMSO converted the non-emissive 1-3 into highly emissive state due to keto tautomer formation. Further increasing water percentage produced deprotonated state of 1-3 in DMSO and enhanced the fluorescence intensity with red shifting of emission peak. At higher water fraction, 1-3 in DMSO produced aggregates and red shifted the emission with reduction of fluorescence intensity. The concentration dependent fluorescence study revealed the very low detection limit of water in DMSO. The limit of detection (LOD) of 1, 2 and 3 were 0.14, 1.04 and 0.65 % of water in DMSO. Hence, simple Schiff bases of 1-3 showed water concentration dependent keto isomer, deprotonated and aggregated state tunable fluorescence in DMSO. Further, scanning electron microscopic (SEM) studies of 1-3 showed water concentration controlled self-assembly and tunable fluorescence.
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Affiliation(s)
- Sasikala Ravi
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Prakash Priyadharshini
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | - Govindan Deviga
- Department of Chemistry, SRM IST, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - Mariappan Mariappan
- Department of Chemistry, SRM IST, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | | | - Mehboobali Pannipara
- Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia; Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G Al-Sehemi
- Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia; Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Republic of Korea.
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Jin K, Park N, Ahn Y, Seo D, Moon D, Sung J, Park J. Solvent-induced structural transformation in a one-dimensional coordination polymer. Nanoscale 2024; 16:4571-4577. [PMID: 38334421 DOI: 10.1039/d4nr00265b] [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: 02/10/2024]
Abstract
We have rationally designed a one-dimensional coordination polymer (1D CP), termed 1D-DGIST-18, that exhibits intrinsic structural flexibility. This 1D CP enables its expansion into a three-dimensional network through supramolecular interactions involving coordinated solvents and/or ligands. The strategic selection of solvents for solvent exchange, prior to drying, significantly influences the structures of 1D-DGIST-18 by removing certain coordinating solvents and modulating π-π stacking. Consequently, a hierarchical porosity emerges, ranging from micro- to meso- to macroporous structures, which is attributed to its inherent structural dynamics. Additionally, the formation of excimers endows 1D-DGIST-18, when immersed in acetone, with 'turn-on' fluorescence, as evidenced by fluorescence decay profiles. These structural transitions within 1D-DGIST-18 are further elucidated using single-crystal X-ray diffractometry. The insights from this study provide a foundation for the design of materials with structural dynamics and tunable properties.
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Affiliation(s)
- Kangwoo Jin
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
| | - Nohyoon Park
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
| | - Yongdeok Ahn
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
| | - Daeha Seo
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang 37673, the Republic of Korea.
| | - Jooyoung Sung
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
| | - Jinhee Park
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology, Daegu 42988, the Republic of Korea.
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Jin K, Moon D, Chen YP, Park J. Comprehensive Qualitative and Quantitative Colorimetric Sensing of Volatile Organic Compounds Using Monolayered Metal-Organic Framework Films. Adv Mater 2024; 36:e2309570. [PMID: 37992300 DOI: 10.1002/adma.202309570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/09/2023] [Indexed: 11/24/2023]
Abstract
Cross-responsive chemical sensors are in high demand owing to their ability to distinguish a broad range of analytes. In this study, a vapochromic sensor array based on metal-organic frameworks (MOFs), which exhibits distinct patterns when exposed to volatile organic compounds (VOCs) and humidity, is developed. Conventional sensor arrays consist of various receptors that produce different responses. The vapochromic MOF-based sensor comprises dicopper paddlewheel clusters and dimethylamine azobenzene as binary colorimetric sensing moieties. Upon exposure to VOCs, the constructed sensor encompasses a broad spectrum of colors, ranging from green to red. Furthermore, the color of the MOF is influenced by the solvent used during the pretreatment. Consequently, monolayered MOF thin films can be adapted to multicomponent array systems by immersing the MOF in different solvents. This system provides both qualitative and quantitative sensing, generating unique color patterns corresponding to specific VOC types. Notably, the sensor successfully discriminates each of 14 common VOCs and water and accurately categorizes unknown samples. Moreover, the system undergoes reversible color changes in response to humidity, obviating the need for high-temperature regeneration steps. This novel approach offers insights into the versatile applications of MOFs by creating a colorimetric sensor array capable of detecting various analytes.
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Affiliation(s)
- Kangwoo Jin
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang, 37673, Republic of Korea
| | - Ying-Pin Chen
- Electrode Engineering, Panasonic Energy of North America, Reno, NV, 89502, USA
| | - Jinhee Park
- Department of Physics and Chemistry, Daegu-Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea
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Yun B, Maulana AY, Lee D, Song J, Futalan CM, Moon D, Kim J. The Effect of Ni Doping on FeOF Cathode Material for High-Performance Sodium-Ion Batteries. Small 2023:e2308011. [PMID: 38152965 DOI: 10.1002/smll.202308011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/10/2023] [Indexed: 12/29/2023]
Abstract
Sodium-ion batteries (SIBs) have emerged as a promising alternative to lithium-ion batteries for large-scale energy storage systems due to the abundance and low price of sodium. Until recently, the low theoretical capacities of intercalation-type cathodes less than 250 mAh g-1 have limited the energy density of SIBs. On the other hand, iron oxyfluoride (FeOF) has a high theoretical capacity of ≈885 mAh g-1 as a conversion-type cathode material for SIBs. However, FeOF suffers from poor cycling stability, rate capability, and low initial Coulombic efficiency caused by its low electrical conductivity and slow ionic diffusion kinetics. To solve these problems, doping aliovalent Ni2+ on FeOF electrodes is attempted to improve the electronic conductivity without using a carbon matrix. The ionic conductivity of FeOF is also enhanced due to the formation of oxygen defects in the FeOF crystal structure. The FeOF-Ni1 electrode shows an excellent cycling performance with a reversible discharge capacity of 450.4 mAh g-1 at 100 mAh g-1 after 100 cycles with a fading rate of 0.20% per cycle. In addition, the FeOF-Ni1//hard carbon full cell exhibited a high energy density of 876.9 Wh kg-1 cathode with a good cycling stability.
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Affiliation(s)
- Boram Yun
- Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea
| | | | - Dawon Lee
- Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea
| | - Jungwook Song
- Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea
| | - Cybelle M Futalan
- Institute of Civil Engineering, University of the Philippines, Diliman, 1127, Philippines
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang, Gyeongbuk, 37673, South Korea
| | - Jongsik Kim
- Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan, 49315, South Korea
- Department of Chemistry, Dong-A University, Busan, 49315, South Korea
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7
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Jin E, Lee IS, Yang DC, Moon D, Nam J, Cho H, Kang E, Lee J, Noh HJ, Min SK, Choe W. Origamic metal-organic framework toward mechanical metamaterial. Nat Commun 2023; 14:7938. [PMID: 38040755 PMCID: PMC10692132 DOI: 10.1038/s41467-023-43647-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 11/15/2023] [Indexed: 12/03/2023] Open
Abstract
Origami, known as paper folding has become a fascinating research topic recently. Origami-inspired materials often establish mechanical properties that are difficult to achieve in conventional materials. However, the materials based on origami tessellation at the molecular level have been significantly underexplored. Herein, we report a two-dimensional (2D) porphyrinic metal-organic framework (MOF), self-assembled from Zn nodes and flexible porphyrin linkers, displaying folding motions based on origami tessellation. A combined experimental and theoretical investigation demonstrated the origami mechanism of the 2D porphyrinic MOF, whereby the flexible linker acts as a pivoting point. The discovery of the 2D tessellation hidden in the 2D MOF unveils origami mechanics at the molecular level.
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Affiliation(s)
- Eunji Jin
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - In Seong Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - D ChangMo Yang
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang, Republic of Korea
| | - Joohan Nam
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Hyeonsoo Cho
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Eunyoung Kang
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Junghye Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Hyuk-Jun Noh
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea
| | - Seung Kyu Min
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea.
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea.
| | - Wonyoung Choe
- Department of Chemistry, Ulsan National Institute of Science and Technology, 50 UNIST, Ulsan, 44919, Republic of Korea.
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology, Ulsan, 44919, Republic of Korea.
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Abstract
Siloxanes have long been known for their highly desirable properties suited for a wide range of practical applications; however, their utilization as modular building blocks for crystalline open frameworks has been limited. In this study, a simple solvothermal pathway has been found to synthesize unprecedented Zn(II)-siloxane clusters supported by acetate ligands, [(RSiO2)8Zn8(CH3CO2)8] (R = Me or Ph). The same reaction using a dicarboxylate ligand such as 1,4-benzenedicarboxylate or 2,6-naphthalenedicarboxylate produces a new type of metal-organic framework, named SiMOF here, based on the [Si8Zn8] units. With the maximum connectivity of 8, the building block is shown to form topologically interesting structures such as octahedral supercages or uninodal 8-connected frameworks. All SiMOFs synthesized possess permanent porosity and high thermal stability and are naturally hydrophobic, as demonstrated by adsorptions of toluene, ethanol, methanol, and water vapor as well as water contact angle measurements. These promising characteristics for well-defined porous solids are attributed to metal-bound siloxane groups in the structural building units.
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Affiliation(s)
- Hyungphil Chun
- Department of Chemical and Molecular Engineering, Hanyang University, Ansan 15588, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
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Muthukumar P, Arunkumar G, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. A water coordinated Ni complex and a 2D Ni-MOF: topology dependent highly enhanced electrocatalytic OER activity. Dalton Trans 2023. [PMID: 37248743 DOI: 10.1039/d3dt00976a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Metal-organic frameworks (MOFs) with their tunable topology, functionality and coordination environment have been considered as potential materials for various applications including electrocatalysis. Herein, we have synthesised a water coordinated nickel based 2D metal-organic framework (Ni-MOF) and a coordination complex (Ni-C) and investigated their electrocatalytic OER activity. The Ni-MOF showed a 2D sheet structure with one water coordination whereas a four water molecule coordinated charged complex was formed in the Ni-C. Thermogravimetric analysis (TGA) confirmed their water coordination and good thermal stability. Interestingly, electrocatalytic OER studies showed strongly enhanced activity for the Ni-MOF and that it required a low overpotential (194 mV) to produce a geometric current density of 10 mA cm-2. The Ni-C required 225 mV to produce 10 mA cm-2. The post-catalytic analysis suggested that the Ni-MOF and Ni-C are converted to nickel hydroxides/oxyhydroxides during electrocatalysis and acted as the catalytic centre. The low Tafel slope and charge transfer resistance further supported the higher activity of Ni-MOF based nickel hydroxides/oxyhydroxides. Chronoamperometric studies revealed the excellent stability of the Ni-MOF based catalyst over 72 h. The present study revealed the potential of developing highly active electrocatalysts based on Ni-MOFs by optimizing the topology and coordination environment.
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Affiliation(s)
- Pandi Muthukumar
- School of Integrated Circuits, Wuhan National Laboratory for optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, PR China
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai - 600077, Tamil Nadu, India
| | - Gunasekaran Arunkumar
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur-613401, Tamil Nadu, India.
| | - Mehboobali Pannipara
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G Al-Sehemi
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127 beongil, Nam-gu, Pohang, Gyeongbuk, Korea.
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Kim K, Oh S, Jeong D, Lee Y, Moon D, Lee S, Cho J. Systematic Electronic Tuning on the Property and Reactivity of Cobalt-(Hydro)peroxo Intermediates. Inorg Chem 2023; 62:7141-7149. [PMID: 37139810 DOI: 10.1021/acs.inorgchem.3c00826] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A series of cobalt(III)-peroxo complexes, [CoIII(R2-TBDAP)(O2)]+ (1R2; R2 = Cl, H, and OMe), and cobalt(III)-hydroperoxo complexes, [CoIII(R2-TBDAP)(O2H)(CH3CN)]2+ (2R2), bearing electronically tuned tetraazamacrocyclic ligands (R2-TBDAP = N,N'-di-tert-butyl-2,11-diaza[3.3](2,6)-p-R2-pyridinophane) were prepared from their cobalt(II) precursors and characterized by various physicochemical methods. The X-ray diffraction and spectroscopic analyses unambiguously showed that all 1R2 compounds have similar octahedral geometry with a side-on peroxocobalt(III) moiety, but the O-O bond lengths of 1Cl [1.398(3) Å] and 1OMe [1.401(4) Å] were shorter than that of 1H [1.456(3) Å] due to the different spin states. For 2R2, the O-O bond vibration energies of 2Cl and 2OMe were identical at 853 cm-1 (856 cm-1 for 2H), but their Co-O bond vibration frequencies were observed at 572 cm-1 for 2Cl and 550 cm-1 for 2OMe, respectively, by resonance Raman spectroscopy (560 cm-1 for 2H). Interestingly, the redox potentials (E1/2) of 2R2 increased in the order of 2OMe (0.19 V) < 2H (0.24 V) < 2Cl (0.34 V) according to the electron richness of the R2-TBDAP ligands, but the oxygen-atom-transfer reactivities of 2R2 showed a reverse trend (k2: 2Cl < 2H < 2OMe) with a 13-fold rate enhancement at 2OMe over 2Cl in a sulfoxidation reaction with thioanisole. Although the reactivity trend contradicts the general consideration that electron-rich metal-oxygen species with low E1/2 values have sluggish electrophilic reactivity, this could be explained by a weak Co-O bond vibration of 2OMe in the unusual reaction pathway. These results provide considerable insight into the electronic nature-reactivity relationship of metal-oxygen species.
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Affiliation(s)
- Kyungmin Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Seongmin Oh
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Donghyun Jeong
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yuri Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Sunggi Lee
- Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of Korea
| | - Jaeheung Cho
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Graduate School of Carbon Neutrality, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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Muthukumar P, Arunkumar G, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Highly enhanced electrocatalytic OER activity of water-coordinated copper complexes: effect of lattice water and bridging ligand. RSC Adv 2023; 13:12065-12071. [PMID: 37082374 PMCID: PMC10111156 DOI: 10.1039/d3ra01186k] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 04/04/2023] [Indexed: 04/22/2023] Open
Abstract
The use of metal-organic compounds as electrocatalysts for water splitting reactions has gained increased attention; however, a fundamental understanding of the structural requirement for effective catalytic activity is still limited. Herein, we synthesized water-coordinated mono and bimetallic copper complexes (CuPz-H2O·H2O, CuPz-H2O, CuBipy-H2O·H2O, and CuMorph-H2O) with varied intermetallic spacing (pyrazine/4,4'-bipyridine) and explored the structure-dependent oxygen evolution reaction (OER) activity in alkaline medium. Single crystal structural studies revealed water-coordinated monometallic complexes (CuMorph-H2O) and bimetallic complexes (CuPz-H2O·H2O, CuPz-H2O, CuBipy-H2O·H2O). Further, CuPz-H2O·H2O and CuBipy-H2O·H2O contained lattice water along with coordinated water. Interestingly, the bimetallic copper complex with lattice water and shorter interspacing between the metal centres (CuPz-H2O·H2O) showed strong OER activity and required an overpotential of 228 mV to produce a benchmark current density of 10 mA cm-2. Bimetallic copper complex (CuPz-H2O) without lattice water but the same intermetallic spacing and bimetallic complex with increased interspacing but with lattice water (CuBipy-H2O·H2O) exhibited relatively lower OER activity. CuPz-H2O and CuBipy-H2O·H2O required an overpotential of 236 and 256 mA cm-2, respectively. Monometallic CuMorph-H2O showed the lowest OER activity (overpotential 271 mV) compared to bimetallic complexes. The low Tafel slope and charge transfer resistance of CuPz-H2O·H2O facilitated faster charge transfer kinetics at the electrode surface and supported the enhanced OER activity. The chronoamperometric studies indicated good stability of the catalyst. Overall, the present structure-electrocatalytic activity studies of copper complexes might provide structural insight for designing new efficient electrocatalysts based on metal coordination compounds.
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Affiliation(s)
- Pandi Muthukumar
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University Chennai-600077 Tamil Nadu India
| | - Gunasekaran Arunkumar
- School of Chemical & Biotechnology, SASTRA Deemed University Thanjavur 613401 Tamil Nadu India
| | - Mehboobali Pannipara
- Research Center for Advanced Materials Science, King Khalid University Abha 61413 Saudi Arabia
- Department of Chemistry, King Khalid University Abha 61413 Saudi Arabia
| | - Abdullah G Al-Sehemi
- Research Center for Advanced Materials Science, King Khalid University Abha 61413 Saudi Arabia
- Department of Chemistry, King Khalid University Abha 61413 Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory 80 Jigokro-127 Beongil, Nam-gu Pohang Gyeongbuk Korea
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12
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Ravi S, Nithiasri PR, Karthikeyan S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Carbazole fluorophore with an imidazole/thiazole unit: contrasting stimuli-induced fluorescence switching, water-sensing and deep-blue emission. RSC Adv 2023; 13:12476-12482. [PMID: 37091617 PMCID: PMC10119750 DOI: 10.1039/d3ra01897k] [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: 03/23/2023] [Accepted: 04/10/2023] [Indexed: 04/25/2023] Open
Abstract
Carbazole-based, π-conjugated donor-acceptor fluorophores were synthesized by integrating imidazole/thiazole units. Then, we investigated the impact of subtle structural changes on fluorescence properties. Carbazole integrated with imidazole (Cz-I) and carbazole integrated with thiazole (Cz-T) showed strong fluorescence in solution (quantum yield (Φ f) = 0.18 (Cz-I) and 0.14 (Cz-T) compared with the standard quinine sulfate) and solid-state (Φ f = 8.0% (Cz-I) and 14.6% (Cz-T)). Cz-I showed relatively more blue-shifted emission in solution compared with the solid-state (λ max = 417 nm (CH3CN) and 460 nm (solid)). Cz-T exhibited deep-blue emission in the solid-state compared with solution (λ max = 455 nm (CH3CN) and 418 nm (solid)). Interestingly, Cz-T exhibited a drastic change in fluorescence in organic solvents (CH3CN, THF, CH3OH, DMSO) with a low percentage (1%) of water. Cz-I showed reversible fluorescence switching between two fluorescence states upon exposure to trifluoracetic acid (TFA)/ammonia (NH3). In contrast, Cz-T displayed reversible/self-reversible off-on fluorescence switching upon exposure to TFA or NH3. Mechanofluorochromic studies of Cz-I showed a slight reduction in fluorescence intensity upon crushing and reversal to the initial state upon heating. Cz-T exhibited off-on reversible/self-reversible fluorescence switching upon crushing/heating. Computational studies indicated that thiazole integration improved the electron-withdrawing characteristics compared with imidazole and contributed to contrasting fluorescence responses. Thus, a simple change of nitrogen with sulfur produced contrasting self-assembly in the solid-state that led to different functional properties and stimuli-induced fluorescence switching.
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Affiliation(s)
- Sasikala Ravi
- School of Chemical & Biotechnology, SASTRA Deemed University Thanjavur 613401 Tamil Nadu India
| | - P R Nithiasri
- School of Chemical & Biotechnology, SASTRA Deemed University Thanjavur 613401 Tamil Nadu India
| | - Subramanian Karthikeyan
- PG and Research Department of Chemistry, Khadir Mohideen College (Affiliated to Bharathidasan Univ.) Adirampattinam Tamil Nadu India
| | - Mehboobali Pannipara
- Research Center for Advanced Materials Science, King Khalid University Abha 61413 Saudi Arabia
- Department of Chemistry, King Khalid University Abha 61413 Saudi Arabia
| | - Abdullah G Al-Sehemi
- Research Center for Advanced Materials Science, King Khalid University Abha 61413 Saudi Arabia
- Department of Chemistry, King Khalid University Abha 61413 Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory 80 Jigokro-127 Beongil, Nam-gu Pohang Gyeongbuk South Korea
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13
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Gayathri P, Ravi S, Karthikeyan S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Synthesis of ESIPT fluorophores with two intramolecular H-bonding functionalities: Reversible mechanofluorochromism and conformation controlled solid state fluorescence efficiency. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135429] [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] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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14
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Gayathri P, Nantheeswaran P, Mariappan M, Karthikeyan S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Methoxy substituent facilitated wide solvatofluorochromism, white light emission, polymorphism and stimuli-responsive fluorescence switching in donor-π-acceptor. Spectrochim Acta A Mol Biomol Spectrosc 2023; 286:121989. [PMID: 36323083 DOI: 10.1016/j.saa.2022.121989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 08/21/2022] [Revised: 10/03/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Introducing methoxy substituent into triphenylamine-acetophenone based donor-π-acceptor fluorophore, 3-(4-(diphenylamino)phenyl)-1-phenylprop-2-en-1-one (1), produced strong solvatofluorochromism including white light emission, fluorescent polymorphs and mechano-responsive fluorescence switching. The unsubstituted and methoxy substituted compounds displayed strong solvent polarity mediated tunable emission in the solution. Interestingly, 3-(4-(diphenylamino)phenyl)-1-(4-methoxyphenyl)prop-2-en-1-one (2) and 3-(4-(diphenylamino)-2-methoxyphenyl)-1-(4-methoxyphenyl)prop-2-en-1-one (3) showed single molecule white light emission in DMSO and ethanol, respectively. 1-3 exhibited strong green/yellow fluorescence in the solid-state (Quantum yield (Φf) = 10 to 23%). 2 produced fluorescent polymorphs (green (2-G) and yellow (2-Y). Single crystal structural analysis revealed that donor and acceptor phenyl units adopted coplanar conformation in 2-G and 3 whereas twisted molecular conformation in 1 and 2-Y. Further, 2-G exhibited π…π interactions facilitated isolated dimers whereas 2-Y showed well separated molecules in the crystal lattice. Aggregation induced emission (AIE) studies showed morphological transformation induced fluorescence tuning for 2. The intramolecular charge transfer (ICT) from TPA to acetophenone was confirmed by computational studies. Mechanofluorochromic (MFC) studies of 1 showed only slight reduction of intensity without modulating fluorescence wavelength significantly but 2 and 3 exhibited visible emissive colour change from yellow to green and vice versa by crushing and heating. Both 2 and 3 also exhibited self-reversible fluorescence switching that was confirmed by PXRD pattern. Thus, methoxy group introduction resulted in obtaining white light emitting fluorescence molecules in the solution state and self-reversible fluorescence switching materials.
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Affiliation(s)
- Parthasarathy Gayathri
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur 613401, Tamil Nadu, India
| | | | - Mariappan Mariappan
- Department of Chemistry, SRM IST, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - Subramanian Karthikeyan
- Department of Chemistry, Khadir Mohideen College (Affiliated to Bharathidasan University), Adirampattinam, Tamil Nadu, India
| | - Mehboobali Pannipara
- Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia; Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G Al-Sehemi
- Research Center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia; Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Republic of Korea.
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15
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Sharma G, Shah M, Ahluwalia P, Gautam G, Dasgupta P, Challacombe B, Bhandari M, Ahlawat R, Rawal S, Buffi N, Sivaraman A, Porter J, Rogers C, Mottire, Abaza R, Rha K, Moon D, Yuvaraja T, Parekh D, Capitanio U, Maes K, Porpiglia F, Turkeri L. Off-clamp versus on-clamp robot-assisted partial nephrectomy: A propensity-matched analysis. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)01060-6] [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] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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16
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Kang S, Park BY, Moon D, Han MS. High-Throughput Approach for Facile Access to Hetero-Dinuclear Synergistic Metal Complex for H 2O 2 Activation and Its Implications. ACS Appl Mater Interfaces 2023; 15:4175-4183. [PMID: 36622965 DOI: 10.1021/acsami.2c21955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hetero-dinuclear synergic catalysis is a promising approach for improving catalytic performance. However, employing it is challenging because the design principles for the metal complex are still not well understood. Further, these complexes have a broader set of possibilities than mononuclear or homometallic systems, increasing the time and effort required to understand them. In this study, we explored a high-throughput approach to obtain a new hetero-dinuclear synergistic metal complex for H2O2 activation. From the 1152 combinations of metal complex candidates obtained by changing three variables (metal ions, unsymmetrical dinucleating ligands, and pH), the lead complex (L3-(Ni, Co)), which has the highest peroxidase activity, was derived using colorimetric parallel analysis. A series of control experiments revealed that L3 plays a crucial role in the formation of active L3-(Ni, Co) complexes, Co2+ acts as a catalytic center, and Ni2+ serves as an assistant catalytic site within L3-(Ni, Co). In addition, the catalytic efficiency of L3-(Ni, Co), which was 125 times that of the homo-bimetallic complex (L3-(Co, Co)), revealed clear hetero-bimetallic synergism in the buffer. The ultraviolet-visible study and electron paramagnetic resonance-based spin-trap experiment provided mechanistic insight into H2O2 activation by the intermediate, which was found to be induced by the reaction of L3-(Ni, Co) and H2O2. Moreover, the intermediate could act as a donor of the hydroperoxyl radical (•OOH) in the buffer. Furthermore, L3-(Ni, Co) demonstrated potential for application as a signal transducer for H2O2 in an enzyme-coupled cascade assay that can be used for the colorimetric detection of glucose.
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Affiliation(s)
- Seungyoon Kang
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Byoung Yong Park
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang 37673, Republic of Korea
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
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17
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Gayathri P, Ravi S, Karthikeyan S, Mohitkar AS, Jayanty S, Pannippara M, Al-Sehemi AG, Moon D, Anthony SP. Triphenylamine-boron complexes: Molecular thermometer and alkyl chain controlled molecular fluorescent liquids. NEW J CHEM 2023. [DOI: 10.1039/d2nj04474a] [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: 03/09/2023]
Abstract
Molecular structural tailoring is one of the versatile approaches for developing functional organic fluorescence molecules with desired properties for practical applications. In this manuscript, we report the synthesis of triphenylamine...
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18
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Lee B, Moon D, Park J. Solvent‐mediated single‐crystal‐to‐single‐crystal transformation of metal–organic cage self‐assembly. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12637] [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: 11/16/2022]
Affiliation(s)
- Byeongchan Lee
- Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory Pohang Republic of Korea
| | - Jinhee Park
- Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu Republic of Korea
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19
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Kwon Y, Lee H, Ryu K, Moon D, Chung H. Paid Sick Leave and Sickness Benefits for employees’ economic and job security: A Scoping Review. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.550] [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] [Indexed: 11/12/2022] Open
Abstract
Abstract
In health emergencies, such as in the COVID-19 pandemic, the need to expand or introduce the Paid sick leave(PSL) and Sickness benefits(SB) increases. They are key components of the universal health coverage(UHC) and active labor market policies(ALMPs) that enable workers to take care of their health and guarantee return-to-work after recovery. This study examines effects those policies in achieving economic stability and job security of covered workers through a scoping review. Studies were selected using the search terms ‘paid sick leave', ‘sickness benefits', ‘paid sick day', and ‘earned sick leave’ in PubMed and Web of Science. Our search conducted on 6th April 2021 yielded 1,030 articles, of which 22 articles were included in the review. All articles were analyzed by the 4 sub-groups(employees, families, employers, and government) and we investigated indicators of socio-economic impacts on their lives. Articles are largely PSL(90.9%)-focused. PSL guarantees not only workers’ job security by securing employment agreement, but also their income security by promising part of wages enough to afford healthcare and living expenses during the medical treatment and recovery. Additionally, PSL attenuates employers’ financial risk, as it reduces presenteeism while increasing the return-to-work rate. Moreover, PSL and SB reduce the total healthcare and social security expenditures of the government. To sum up, PSL and SB guarantee health and labor rights by ensuring income and job security to employees while assuring financial stability to both employers, and the government. However, as the previous studies paid less attention on the equity of these impacts at the system levels, future research should more focus on the dimension.
Key messages
• PSL and SB guarantee health and labour rights by ensuring income and job security for employees, while assuring financial stability for both employers and the government.
• The previous studies that examined the effects of PSL and SB paid less attention on the equity of ensuring income and employment security, therefore future studies should focus more on this dimension.
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Affiliation(s)
- Y Kwon
- Department of Public Health Sciences, Graduate School, Korea University , Seoul, South Korea
- BK21 FOUR Learning Health Systems, Korea University , Seoul, South Korea
| | - H Lee
- Department of Public Health Sciences, Graduate School, Korea University , Seoul, South Korea
- BK21 FOUR Learning Health Systems, Korea University , Seoul, South Korea
| | - K Ryu
- Department of Public Health Sciences, Graduate School, Korea University , Seoul, South Korea
- BK21 FOUR Learning Health Systems, Korea University , Seoul, South Korea
| | - D Moon
- People’s Health Institute , Seoul, South Korea
| | - H Chung
- BK21 FOUR Learning Health Systems, Korea University , Seoul, South Korea
- School of Health Policy and Management, Korea University , Seoul, South Korea
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20
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Yu S, Moon D, Sohn M, Kim J, Chung H. A Sick Benefit Scheme Reduces Unmet Healthcare Needs: An Natural Experiment in Seoul. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac131.271] [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] [Indexed: 11/14/2022] Open
Abstract
Abstract
South Korea experiences four times more unmet healthcare needs than OECD countries (11.6% and 2.6% respectively). Unmet healthcare needs are caused by the double burden of direct and indirect costs including income loss, and OECD countries operate a sickness benefit scheme to resolve sudden loss of pay. Seoul introduced the first sickness benefit system, Seoul-Type Paid Sick Leave Support (hereinafter Seoul Sick Leave), for self-employed national healthcare insurance subscribers to reduce the rate of unmet healthcare needs. By comparing the amount of increasing medical expenses between the beneficiary and non-beneficiary before (2018) and after (2019-2020) the introduction of the system, the study was intended to confirm the reduced unmet healthcare needs. This study used data from the National Health Information Database (NHID) and the difference in differences (DID) analytic framework. 96 and 121 patients were included in benefit and non-benefit cohorts, respectively. As a result, the beneficiary group’s expenses were smaller than those of the non-beneficiary group (coef.=-1.24, p = 0.026). However, the beneficiary group had a greater amount of increase in hospitalization expenses before and after the introduction than the non-beneficiary group did (coef.=1.66, p = 0.005). Our finding showed that the Seoul Sick Leave helped the precarious workers as they were able to use inpatient services when they needed. If it is to be scaled up to the national level, it should be applied all people to enhance universal health insurance in Korea.
Key messages
• Identified the effectiveness of the first sickness benefit system as it helped the precarious workers as they were able to use inpatient services when they needed.
• By financially supporting them, the Seoul Sick Leave support can achieve health promotion through early detection and treatment.
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Affiliation(s)
- S Yu
- BK21FOUR R&E Center for Learning Health Systems, Korea University , Seoul, South Korea
- Health Policy and Management, Korea University , Seoul, South Korea
| | - D Moon
- Center for Labour and Health, People’s Health Institute , Seoul, South Korea
| | - M Sohn
- Division of Health and Medical Sciences, The Cyber University of Korea , Seoul, South Korea
| | - J Kim
- Health Policy and Management, Korea University , Seoul, South Korea
| | - H Chung
- BK21FOUR R&E Center for Learning Health Systems, Korea University , Seoul, South Korea
- Health Policy and Management, Korea University , Seoul, South Korea
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Hong Y, Yeon S, Jeong J, Moon D, You T. Rare earth
metal‐doped Zintl phase thermoelectric materials: The
Yb
5−
x
RE
x
Al
2
Sb
6
(
RE
=Pr, Nd, Sm) system. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12609] [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: 11/11/2022]
Affiliation(s)
- Yeongjin Hong
- Department of Chemistry and BK21 Four Research Team Chungbuk National University Cheongju Republic of Korea
| | - Seongbeom Yeon
- Department of Chemistry and BK21 Four Research Team Chungbuk National University Cheongju Republic of Korea
| | - Jiwon Jeong
- Department of Chemistry and BK21 Four Research Team Chungbuk National University Cheongju Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory Pohang Republic of Korea
| | - Tae‐Soo You
- Department of Chemistry and BK21 Four Research Team Chungbuk National University Cheongju Republic of Korea
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22
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Kim M, Park S, Song D, Moon D, You Y, Lim M, Lee HI. Visible-light NO photolysis of ruthenium nitrosyl complexes with N 2O 2 ligands bearing π-extended rings and their photorelease dynamics. Dalton Trans 2022; 51:11404-11415. [PMID: 35822310 DOI: 10.1039/d2dt01019d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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
NO photorelease and its dynamics for two {RuNO}6 complexes, Ru(salophen)(NO)Cl (1) and Ru(naphophen)(NO)Cl (2), with salen-type ligands bearing π-extended systems (salophenH2 = N,N'-(1,2-phenylene)-bis(salicylideneimine) and naphophenH2 = N,N'-1,2-phenylene-bis(2-hydroxy-1-naphthylmethyleneimine)) were investigated. NO photolysis was performed under white room light and monitored by UV/Vis, EPR, and NMR spectroscopies. NO photolysis was also performed under 459 and 489 nm irradiation for 1 and 2, respectively. The photochemical quantum yields of the NO photolysis (ΦNO) of both 1 and 2 were determined to be 9% at the irradiation wavelengths. The structural and spectroscopic characteristics of the complexes before and after the photolysis confirmed the conversion of diamagnetic Ru(II)(L)(Cl)-NO+ to paramagnetic S = ½ Ru(III)(L)(Cl)-solvent by photons (L = salophen2- and naphophen2-). The photoreleased NO radicals were detected by spin-trapping EPR. DFT and TDDFT calculations found that the photoactive bands are configured as mostly the ligand-to-ligand charge transfer (LLCT) of π(L) → π*(Ru-NO), suggesting that the NO photorelease was initiated by the LLCT. Dynamics of NO photorelease from the complexes in DMSO under 320 nm excitation were investigated by femtosecond (fs) time-resolved mid-IR spectroscopy. The primary photorelease of NO occurred for less than 0.32 ps after the excitation. The rate constants (k-1) of the geminate rebinding of NO to the photolyzed 1 and 2 were determined to be (15 ps)-1 and (13 ps)-1, respectively. The photochemical quantum yields of NO photolysis (ΦNO, λ = 320 nm) were estimated to be no higher than 14% for 1 and 11% for 2, based on the analysis of the fs time-resolved IR data. The results of fs time-resolved IR spectroscopy and theoretical calculations provided some insight into the overall kinetic reaction pathway, localized electron pathway or resonance pathway, of the NO photolysis of 1 and 2. Overall, our study found that the investigated {RuNO}6 complexes, 1 and 2, with planar N2O2 ligands bearing π-extended rings effectively released NO under visible light.
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Affiliation(s)
- Minyoung Kim
- Department of Chemistry and Green-Nano Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Seongchul Park
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea.
| | - Dayoon Song
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dohyun Moon
- Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Youngmin You
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Manho Lim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 46241, Republic of Korea.
| | - Hong-In Lee
- Department of Chemistry and Green-Nano Research Center, Kyungpook National University, Daegu 41566, Republic of Korea.
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Zilli T, Siva S, Heikkilä R, Dirix P, Liefhooghe N, Otte F, Gomez-Iturriaga A, Everaerts W, Shelan M, Conde- Moreno A, López Campos F, Papachristofilou A, Guckenberger M, Scorsetti M, Zapatero A, Villafranca Iturre A, Eito C, Couñago F, Muto P, Van De Voorde L, Fonteyne V, Moon D, Thon K, Mercier C, Achard V, Stellamans K, Goetghebeur E, Reynders D, Ost P. OC-0603 PEACE V – STORM randomized phase II trial for oligorecurrent nodal prostate cancer: acute toxicity. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02625-1] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Park S, Lee J, Jeong H, Bae S, Kang J, Moon D, Park J. Multi-stimuli-engendered radical-anionic MOFs: Visualization of structural transformation upon radical formation. Chem 2022. [DOI: 10.1016/j.chempr.2022.03.023] [Citation(s) in RCA: 2] [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: 01/03/2023]
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25
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Doan P, Counter W, Sheehan-Dare G, Papa N, Ho B, Lee J, Liu V, Thompson J, Agrawal S, Roberts M, Algharzo O, Buteau J, Hofman M, Moon D, Murphy D, Stricker P, Emmett L. Diagnostic accuracy, concordance and certainty with 68Ga-PSMA-11 PET/MRI fusion compared to mpMRI and 68Ga-PSMA-11 PET/CT alone for prostate cancer diagnosis: A PRIMARY trial sub-study. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00822-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Chen K, O'Brien J, Jenjitranant P, Alghazo O, Kelly B, Murphy D, Moon D. Robotic partial nephrectomy for complex hilar renal masses - key techniques for a successful outcome. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)01356-2] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Xue A, Kalapara A, Ballok Z, Levy S, Sivaratnam D, Moon D, Grummet J, Frydenberg M. 68Ga-PSMA PET SUVmax predicts adverse pathology and pathologic upgrading in intermediate risk prostate cancer. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00557-7] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Xue A, Kalapara A, Ballok Z, Levy S, Sivaratnam D, Moon D, Grummet J, Frydenberg M. 68Ga-PSMA PET SUVmax predicts gleason pattern 4 at biopsy in intermediate risk prostate cancer. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00555-3] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Jeong S, Sim Y, Kim JK, Shin S, Lim J, Seong J, Lee S, Moon D, Baek SB, Kim CU, Ryu JH, Lah MS. Creating Tunable Mesoporosity by Temperature-Driven Localized Crystallite Agglomeration. Small 2022; 18:e2107006. [PMID: 35006648 DOI: 10.1002/smll.202107006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/13/2021] [Revised: 12/07/2021] [Indexed: 06/14/2023]
Abstract
A new synthetic approach for tunable mesoporous metal-organic frameworks (MeMs) is developed. In this approach, mesopores are created in the process of heat conversion of highly mosaic metal-organic framework (MOF) crystals with non-interpenetrated low-density nanocrystallites into MOF crystals with two-fold interpenetrated high-density nanocrystallites. The two-fold interpenetration reduces the volume of the nanocrystallites in the mosaic crystal, and the accompanying localized agglomeration of the nanocrystallites results in the formation of mesopores among the localized crystallite agglomerates. The pore size can be easily modulated from 7 to 90 nm by controlling the heat treatment conditions, that is, the aging temperature and aging time. Various proteins can be encapsulated in the MeM, and immobilized enzymes show catalyst activity comparable to that of the free native enzymes. Immobilized β-galactosidase is recyclable and the enzyme activity of the immobilized catalase is maintained after exposure to high temperatures and various organic solvents.
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Affiliation(s)
- Seok Jeong
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Youjung Sim
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Jin Kyun Kim
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Sunyoung Shin
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Jaewoong Lim
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Junmo Seong
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Seonghwan Lee
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Dohyun Moon
- Pohang Accelerator Laboratory, Pohang, 37673, Korea
| | - Seung Bin Baek
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Chae Un Kim
- Department of Physics, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Ja-Hyoung Ryu
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
| | - Myoung Soo Lah
- Department of Chemistry, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea
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Muthukumar P, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Disordered spinel cobalt oxide electrocatalyst for highly enhanced HER activity in an alkaline medium. NEW J CHEM 2022. [DOI: 10.1039/d2nj01879a] [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] [Indexed: 11/21/2022]
Abstract
Calcination of commercial cobalt salts at 800 °C produced a disordered spinel structure with more crystal strain and exhibited highly enhanced HER activity.
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Affiliation(s)
- Pandi Muthukumar
- Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - Mehboobali Pannipara
- Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G. Al-Sehemi
- Department of Chemistry, King Khalid University, Abha 61413, Saudi Arabia
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Korea
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Gayathri P, Subramaniyan SB, Veerappan A, Anwarhussaini S, Jayanty S, Pannipara M, Al-Sehemi AG, Moon D, Anthony SP. Dark to bright fluorescence state by inter-connecting fluorophores: concentration-dependent blue to NIR emission and live cell imaging applications. NEW J CHEM 2022. [DOI: 10.1039/d2nj03457c] [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] [Indexed: 11/21/2022]
Abstract
Interconnected AIEgens produced concentration dependent tunable emission from blue to NIR.
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Affiliation(s)
- Parthasarathy Gayathri
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur – 613401, Tamil Nadu, India
| | - Siva Bala Subramaniyan
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur – 613401, Tamil Nadu, India
| | - Anbazhagan Veerappan
- School of Chemical & Biotechnology, SASTRA Deemed University, Thanjavur – 613401, Tamil Nadu, India
| | - Syed Anwarhussaini
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Hyderabad – 500078, India
| | - Subbalakshmi Jayanty
- Department of Chemistry, Birla Institute of Technology and Science, Pilani-Hyderabad Campus, Hyderabad – 500078, India
| | - Mehboobali Pannipara
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Abdullah G. Al-Sehemi
- Department of chemistry, King Khalid University, Abha 61413, Saudi Arabia
- Research center for Advanced Materials Science, King Khalid University, Abha 61413, Saudi Arabia
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127beongil, Nam-gu, Pohang, Gyeongbuk, Korea
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Gayathri P, Ravi S, Karthikeyan S, Pannippara M, Al-Sehemi AG, Moon D, Anthony SP. Pyridine Nitrogen Position Controlled Molecular Packing and Stimuli-responsive Solid-State Fluorescence Switching: Supramolecular Complexation Facilitated Turn-on Fluorescence. CrystEngComm 2022. [DOI: 10.1039/d1ce01688a] [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
Fluorophore structure and supramolecular interactions plays important role on the molecular conformation and packing in the solid state that strongly influenced on the solid-state fluorescence properties. Herein, we report the...
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Gayathri P, Ravi S, Karthikeyan S, Pannippara M, Al-Sehemi AG, Moon D, Anthony SP. Hexagon and network structured organic geometrical isomers with distinct intramolecular H-bonding and stimuli-induced self-reversible fluorescence switching. CrystEngComm 2022. [DOI: 10.1039/d2ce01361d] [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: 12/12/2022]
Abstract
The structural assembly of organic fluorescence molecules exert significant influence on the solid-state fluorescence properties including fluorescence tuning and switching. Herein, we have synthesized a Schiff base based organic fluorophore,...
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Gayathri P, Ravi S, Akshaya K, Karthikeyan S, Pannippara M, Al-Sehemi AG, Moon D, Anthony SP. ESIPT geometrical isomers with distinct mechanofluorochromism and intra/intermolecular H-bonding controlled tunable fluorescence. CrystEngComm 2022. [DOI: 10.1039/d2ce01210c] [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
Integrating intramolecular H-bonding functionality in organic fluorophore produces excited state intramolecular proton transfer (ESIPT) mechanism facilitated large Stokes shifted fluorescent materials. The tunable and environmental sensitive fluorescence of ESIPT molecules...
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Sher D, Avkshtol V, Moon D, Wang J, Chen L, Dohopolski M, Hughes R, Vo D. Recurrence and Quality-of-Life Following Involved Node Radiotherapy for Head and Neck Squamous Cell Carcinoma: Initial Results From the Phase II INRT-Air Trial. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1155] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moon D, Jeon J, Choi JH. Two exodentate conformations, spectroscopic properties, and Hirshfeld surface analysis of new macrocyclic compounds with tetrabromide and tetraperchlorate. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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37
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Burningham K, Moore W, Moon D, Avkshtol V, Day A, Sumer B, Vo D, Bishop J, Hughes R, Sher D. Prognostic Impact of Matted Lymphadenopathy in Oropharynx Cancer Treated With Chemoradiotherapy. Int J Radiat Oncol Biol Phys 2021. [DOI: 10.1016/j.ijrobp.2021.07.1168] [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] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jang D, Lee S, Lee J, Moon D, Rhee YH. Frontispiece: Palladium‐Catalyzed Asymmetric Decarboxylative Addition of β‐Keto Acids to Heteroatom‐Substituted Allenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/anie.202184161] [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)
- Dong‐Jin Jang
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Juyeol Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory 80 Jigokro-127-beongil, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
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Jang D, Lee S, Lee J, Moon D, Rhee YH. Frontispiz: Palladium‐Catalyzed Asymmetric Decarboxylative Addition of β‐Keto Acids to Heteroatom‐Substituted Allenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202184161] [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)
- Dong‐Jin Jang
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Juyeol Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory 80 Jigokro-127-beongil, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
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Jang DJ, Lee S, Lee J, Moon D, Rhee YH. Palladium-Catalyzed Asymmetric Decarboxylative Addition of β-Keto Acids to Heteroatom-Substituted Allenes. Angew Chem Int Ed Engl 2021; 60:22166-22171. [PMID: 34278680 DOI: 10.1002/anie.202107990] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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: 06/15/2021] [Indexed: 11/06/2022]
Abstract
The Pd-catalyzed asymmetric addition reaction of β-keto acids to heteroatom-substituted allene is reported. This reaction generates β-substituted ketones in an asymmetric manner through a branch-selective decarboxylative allylation pathway. The reaction accommodates various alkoxyallenes as well as amidoallenes.
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Affiliation(s)
- Dong-Jin Jang
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Juyeol Lee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-ro 77, Nam-gu, Pohang, Gyeongbuk, 37673, Republic of Korea
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41
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Jang D, Lee S, Lee J, Moon D, Rhee YH. Palladium‐Catalyzed Asymmetric Decarboxylative Addition of β‐Keto Acids to Heteroatom‐Substituted Allenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107990] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dong‐Jin Jang
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Sukhyun Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Juyeol Lee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory 80 Jigokro-127-beongil, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry Pohang University of Science and Technology Cheongam-ro 77, Nam-gu Pohang Gyeongbuk 37673 Republic of Korea
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42
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Sa H, Lee J, Jo H, Moon D, Kim M, Ok KM, You TS. p-Type Double Doping and the Diamond-like Morphology Shift of the Zintl Phase Thermoelectric Materials: The Ca 11-xA xSb 10-yGe z (A = Na, Li; 0.06(3) ≤ x ≤ 0.17(5), 0.19(1) ≤ y ≤ 0.55(1), 0.13(1) ≤ z ≤ 0.22(1)) System. Inorg Chem 2021; 60:10124-10136. [PMID: 34100596 DOI: 10.1021/acs.inorgchem.0c03705] [Citation(s) in RCA: 3] [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: 11/30/2022]
Abstract
Five ternary and quaternary Zintl phases in the solid-solution Ca11-xAxSb10-yGez (A = Na, Li; 0.06(3) ≤ x ≤ 0.17(5), 0.19(1) ≤ y ≤ 0.55(1), 0.13(1) ≤ z ≤ 0.22(1)) system have been successfully synthesized by both of the arc-melting and the molten Pb metal-flux reactions. The crystal structure of these title compounds was characterized by powder and single-crystal X-ray diffractions analyses, and all title compounds crystallized in the Ho11Ge10-type phase in the tetragonal space group I4/mmm (Z = 4, Pearson code tI84). The complex crystal structure can be described as an assembly of 1) three kinds of cationic polyhedra centered by three different Sb and 2) the cage-shaped anionic frameworks built through the connection of two types of Sb. The newly substituted p-type double dopants of the cationic (Na and Li) and anionic (Ge) elements displayed particular site preferences, which were successfully explained by either the size-factor criterion based on the atomic size or the electronic-factor criterion based on the electronegativity of an element. Quite interestingly, as the reaction conditions were changed, the morphology shift of single crystals in Ca10.94(3)Na0.06Sb9.58(1)Ge0.21 occurred from a cubic-shaped to a hummocky-type, to a hopper-type, and eventually to an octahedral-shaped crystal, just like the Yakutian kimberlite diamonds. Moreover, we firmly believe that the inclusion of the p-type Ge dopant for Sb was crucial to trigger this type of morphology shift and complete the octahedral-shaped morphology in the overall crystal-growth mechanism. The theoretical calculations using a DFT method rationalized the observed site preference of Na and the electronic effect of the p-type Ge dopants. The Seebeck coefficient measurements for Ca10.88(4)Li0.12Sb9.45(1)Ge0.21 indicated that some portions of electron charge carriers were effectively eliminated by the p-type double dopants using Li and Ge.
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Affiliation(s)
- Hayeon Sa
- Department of Chemistry and BK21Four Research Team, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Junsu Lee
- Department of Chemistry and BK21Four Research Team, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Hongil Jo
- Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Min Kim
- Department of Chemistry and BK21Four Research Team, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Kang Min Ok
- Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Tae-Soo You
- Department of Chemistry and BK21Four Research Team, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
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Moon D, Jeon S, Lim WT, Ryoo KS, Choi JH. Crystal structure of di-aqua-(3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.0 7,12]docosa-ne)copper(II) (3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo[16.4.0.0 7,12]docosa-ne)copper(II) tetra-bromide dihydrate, [Cu(C 22H 44N 4)(H 2O) 2][Cu(C 22H 44N 4)]Br 4·2H 2O. Acta Crystallogr E Crystallogr Commun 2021; 77:677-680. [PMID: 34164151 PMCID: PMC8183443 DOI: 10.1107/s205698902100551x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 05/26/2021] [Indexed: 11/26/2022]
Abstract
The crystal structure of the new double CuII complex salt, [Cu(L)(H2O)2][Cu(L)]Br4·2H2O (L = 3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.07,12]docosane, C22H44N4) has been determined using synchrotron radiation. The asymmetric unit contains one half of a [Cu(L)(H2O)2]2+ cation, one half of a [Cu(L)]2+ cation (both completed by crystallographic inversion symmetry), two bromide anions and one water solvent mol-ecule. The CuII atom in the first complex exists in a tetra-gonally distorted octa-hedral environment with the four N atoms of the macrocyclic ligand in equatorial and two aqua ligands in axial positions, whereas the CuII atom in the second complex exists in a square-planar environment defined by the four nitro-gen atoms of the macrocyclic ligand. The two macrocyclic rings adopt the most stable trans-III configuration with normal Cu-N bond lengths from 2.016 (3) to 2.055 (3) Å and an axial Cu-O bond length of 2.658 (4) Å. The crystal structure is stabilized by inter-molecular hydrogen bonds involving the macrocycle N-H or C-H groups and the O-H groups of water mol-ecules as donor groups, and the O atoms of water mol-ecules and bromide anions as acceptor groups, giving rise to a one-dimensional network extending parallel to [100].
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Affiliation(s)
- Dohyun Moon
- Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea
| | - Sunghwan Jeon
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
| | - Woo Taik Lim
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
| | - Keon Sang Ryoo
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
| | - Jong-Ha Choi
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
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Moon D, Jeon S, Choi JH. Crystal structure, endo/exodentate conformations, spectroscopic properties, and Hirshfeld surface analysis of two constrained cyclam compounds with bromides and hydrates. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Moon D, Choi JH. Crystal structure of di-aqua-(3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.0 7,12]docosa-ne)copper(II) dichloride tetra-hydrate. Acta Crystallogr E Crystallogr Commun 2021; 77:569-572. [PMID: 34026267 PMCID: PMC8100274 DOI: 10.1107/s2056989021004382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 04/24/2021] [Indexed: 11/10/2022]
Abstract
The crystal structure of the novel hydrated CuII salt, [Cu(L)(H2O)2]Cl2·4H2O (L = 3,14-diethyl-2,6,13,17-tetra-aza-tri-cyclo-[16.4.0.07,12]docosane, C22H44N4) has been determined using synchrotron radiation. The asymmetric unit contains one half of the [Cu(L)(H2O)2]2+ cation (completed by crystallographic inversion symmetry), one chloride anion and two lattice water mol-ecules. The copper(II) atom exists in a tetra-gonally distorted octa-hedral environment with the four N atoms of the macrocyclic ligand in equatorial and two O atoms from water mol-ecules in axial positions. The latter exhibit a long axial Cu-O bond length of 2.7866 (16) Å due to the Jahn-Teller distortion. The macrocyclic ring adopts a stable trans-III conformation with typical Cu-N bond lengths of 2.0240 (11) and 2.0441 (3) Å. The complex is stabilized by hydrogen bonds formed between the O atoms of coordinated water mol-ecules and the NH groups as donors, and chloride anions as acceptors. The chloride anions are further connected to the lattice water solvent molecules through O-H⋯Cl hydrogen bonds, giving rise to a three-dimensional network structure.
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Affiliation(s)
- Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea
| | - Jong-Ha Choi
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
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Moon D, Jeon S, Choi JH. Crystal structure of 3,14-dimethyl-2,13-di-aza-6,17-diazo-niatri-cyclo-[16.4.0.0 7,12]docosane bis-(per-chlorate) from synchrotron X-ray data. Acta Crystallogr E Crystallogr Commun 2021; 77:551-554. [PMID: 34026263 PMCID: PMC8100260 DOI: 10.1107/s2056989021004278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 04/20/2021] [Indexed: 11/10/2022]
Abstract
The crystal structure of the title salt, C20H42N4 2+·2ClO4 -, has been determined using synchrotron radiation at 220 (2) K. The structure determination reveals that protonation has occurred at diagonally opposite amine N atoms. The asymmetric unit comprises one half of the organic dication, which lies about a center of inversion, and one perchlorate anion. The macrocyclic dication adopts the most stable endodentate trans-III conformation. The crystal structure is stabilized by intra-molecular N-H⋯N, and inter-molecular N-H⋯O and C-H⋯O hydrogen bonds involving the macrocycle N-H and C-H groups as donors and the O atoms of perchlorate anions as acceptors, giving rise to a three-dimensional network.
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Affiliation(s)
- Dohyun Moon
- Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea
| | - Sunghwan Jeon
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
| | - Jong-Ha Choi
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
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Moon D, Choi JH. Crystal structure and anti/syn-conformational isomers of trans-bis[dibromobis(2,2-dimethyl-1,3-propanediamine)chromium(III)] tetrabromozincate. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120259] [Citation(s) in RCA: 3] [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: 11/27/2022]
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Kang T, Kim H, Jeoung S, Moon D, Moon HR, Lee D. Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions. Chem Sci 2021; 12:6378-6384. [PMID: 34084437 PMCID: PMC8115244 DOI: 10.1039/d1sc01163d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Indexed: 01/15/2023] Open
Abstract
With small molecules, it is not easy to create large void spaces. Flat aromatics stack tightly, while flexible chains fold to fill the cavities. As an intuitive design to make open channels inside molecularly constructed solids, we employed propeller-shaped bicyclic triazoles to prepare a series of aromatic-rich three-dimensional (3D) building blocks. This modular approach has no previous example, but is readily applicable to build linear, bent, and branched arrays of non-stackable architectural motifs from existing flat aromatics by single-pot reactions. A letter H-shaped molecule thus prepared self-assembles into porous crystals, the highly unusual stepwise gas sorption behaviour of which prompted in-depth studies. A combination of single-crystal and powder X-ray diffraction analysis revealed multiple polymorphs, and sterically allowed pathways for their reversible interconversions that open and close the pores in response to external stimuli. Like non-collapsible open voids within stacks of steel H-beams, a non-covalent assembly of three-dimensional aromatics produces porous crystals. Concerted motions of the molecular H-beams open and close the cavities in response to external stimuli.![]()
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Affiliation(s)
- Taewon Kang
- Department of Chemistry, Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea
| | - Hongsik Kim
- Department of Chemistry, Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea
| | - Sungeun Jeoung
- Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil, Eonyang-eup, Ulji-gun Ulsan 44919 Korea
| | - Dohyun Moon
- Pohang Accelerator Laboratory 80 Jigokro-127-beongil, Nam-gu Pohang 37673 Korea
| | - Hoi Ri Moon
- Ulsan National Institute of Science and Technology (UNIST) 50 UNIST-gil, Eonyang-eup, Ulji-gun Ulsan 44919 Korea
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea
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Lee J, Hong Y, Yeon S, Moon D, You T. Effect of Cationic and Anionic Doping in the Quinary Zintl Phase Thermoelectric Material
Ca
5‐
x
Yb
x
Al
2‐
y
In
y
Sb
6‐
z
Sn
z
System. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Junsu Lee
- Department of Chemistry and BK21Four Research Team Chungbuk National University Cheongju Chungbuk 28644 Republic of Korea
| | - Yeongjin Hong
- Department of Chemistry and BK21Four Research Team Chungbuk National University Cheongju Chungbuk 28644 Republic of Korea
| | - Seongbeom Yeon
- Department of Chemistry and BK21Four Research Team Chungbuk National University Cheongju Chungbuk 28644 Republic of Korea
| | - Dohyun Moon
- Beamline Department Pohang Accelerator Laboratory Pohang Gyeongbuk 37673 Republic of Korea
| | - Tae‐Soo You
- Department of Chemistry and BK21Four Research Team Chungbuk National University Cheongju Chungbuk 28644 Republic of Korea
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Moon D, Choi JH. Crystal structure of cis-(1,4,8,11-tetra-aza-cyclo-tetra-decane-κ 4 N)bis-(thio-cyanato-κ N)chromium(III) bromide from synchrotron X-ray diffraction data. Acta Crystallogr E Crystallogr Commun 2021; 77:222-225. [PMID: 33953940 PMCID: PMC8061105 DOI: 10.1107/s2056989021001055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 01/28/2021] [Indexed: 11/23/2022]
Abstract
The crystal structure of the title complex, cis-[Cr(NCS)2(cyclam)]Br (cyclam = 1,4,8,11-tetra-aza-cyclo-tetra-decane, C10H24N4), has been determined from synchrotron X-ray data. The asymmetric unit contains one [Cr(NCS)2(cyclam)]+ cation and one bromide anion. The CrIII ion of the complex cation is coordinated by the four N atoms of the cyclam ligand and by two N-coordinating NCS groups in a cis arrangement, displaying a distorted octa-hedral coordination sphere. The Cr-N(cyclam) bond lengths are in the range 2.075 (3) to 2.081 (3) Å while the average Cr-N(NCS) bond length is 1.996 (16) Å. The macrocyclic cyclam moiety adopts the most stable cis-V conformation. The crystal structure is stabilized by inter-molecular hydrogen bonds involving the cyclam N-H groups as donor groups, and the bromide anion and the S atom of one of the NCS ligands as acceptor groups.
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Affiliation(s)
- Dohyun Moon
- Beamline Department, Pohang Accelerator Laboratory, POSTECH, Pohang 37673, Republic of Korea
| | - Jong-Ha Choi
- Department of Chemistry, Andong National University, Andong 36729, Republic of Korea
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