1
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He S, Huang B, Xiao B, Chang S, Podalko M, Nau WM. Stabilization of Guest Molecules inside Cation-Lidded Cucurbiturils Reveals that Hydration of Receptor Sites Can Impede Binding. Angew Chem Int Ed Engl 2023; 62:e202313864. [PMID: 37812692 DOI: 10.1002/anie.202313864] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
Docking of alkali metal ions to water-soluble macrocyclic receptors generally reduces the affinity of guest molecules due to competitive binding. The idea that solvation water molecules could display a larger steric hindrance towards guest binding than cations has not been considered to date. We show that the docking of large cations to cucurbit[5]uril (CB5) unexpectedly increases (by a factor of 5-8) the binding of hydrophobic guests, methane and ethane. This is due to the removal of water molecules from the carbonyl portals of CB5 during cation binding, which frees up space for hydrophobe encapsulation. In contrast, smaller cations like sodium protrude deeply into the cavity of CB5 and cause the expected decrease in binding, such that the rational selection of alkali cations allows for a variation of up to a factor of 20 in binding of methane and ethane. The statistical analysis of crystallographic data shows that the cavity volume of CB5 can be enlarged by placing large alkali ions (Rb+ and Cs+ ) centro-symmetrically at the portals. The results reveal a hitherto elusive steric hindrance of solvation water molecules near receptor binding sites, which is pertinent for the design of supramolecular catalysts and the understanding of biological receptors.
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Affiliation(s)
- Suhang He
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
- Center of Single-Molecule Sciences, College of Electronic Information and Optical Engineering, Nankai University, 38 Tongyan Road, Jinnan District, 300350, Tianjin, China
| | - Bing Huang
- Faculty of Physics, University of Vienna, Kolingasse 14-16, 10905, Vienna, Austria
| | - Bohuai Xiao
- The State Key Laboratory of Refractories and Metallurgy, Faculty of Materials, Wuhan University of Science and Technology, 430081, Wuhan, Hubei, China
| | - Shuai Chang
- The State Key Laboratory of Refractories and Metallurgy, Faculty of Materials, Wuhan University of Science and Technology, 430081, Wuhan, Hubei, China
| | - Marina Podalko
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Werner M Nau
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
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2
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Wang KY, Zhang J, Hsu YC, Lin H, Han Z, Pang J, Yang Z, Liang RR, Shi W, Zhou HC. Bioinspired Framework Catalysts: From Enzyme Immobilization to Biomimetic Catalysis. Chem Rev 2023; 123:5347-5420. [PMID: 37043332 PMCID: PMC10853941 DOI: 10.1021/acs.chemrev.2c00879] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Indexed: 04/13/2023]
Abstract
Enzymatic catalysis has fueled considerable interest from chemists due to its high efficiency and selectivity. However, the structural complexity and vulnerability hamper the application potentials of enzymes. Driven by the practical demand for chemical conversion, there is a long-sought quest for bioinspired catalysts reproducing and even surpassing the functions of natural enzymes. As nanoporous materials with high surface areas and crystallinity, metal-organic frameworks (MOFs) represent an exquisite case of how natural enzymes and their active sites are integrated into porous solids, affording bioinspired heterogeneous catalysts with superior stability and customizable structures. In this review, we comprehensively summarize the advances of bioinspired MOFs for catalysis, discuss the design principle of various MOF-based catalysts, such as MOF-enzyme composites and MOFs embedded with active sites, and explore the utility of these catalysts in different reactions. The advantages of MOFs as enzyme mimetics are also highlighted, including confinement, templating effects, and functionality, in comparison with homogeneous supramolecular catalysts. A perspective is provided to discuss potential solutions addressing current challenges in MOF catalysis.
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Affiliation(s)
- Kun-Yu Wang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
(MOE) and Renewable Energy Conversion and Storage Center (RECAST),
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jiaqi Zhang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
(MOE) and Renewable Energy Conversion and Storage Center (RECAST),
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yu-Chuan Hsu
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Hengyu Lin
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Zongsu Han
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
(MOE) and Renewable Energy Conversion and Storage Center (RECAST),
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jiandong Pang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- School
of Materials Science and Engineering, Tianjin Key Laboratory of Metal
and Molecule-Based Material Chemistry, Nankai
University, Tianjin 300350, China
| | - Zhentao Yang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
(MOE) and Renewable Energy Conversion and Storage Center (RECAST),
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Rong-Ran Liang
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Wei Shi
- Department
of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry
(MOE) and Renewable Energy Conversion and Storage Center (RECAST),
College of Chemistry, Nankai University, Tianjin 300071, China
| | - Hong-Cai Zhou
- Department
of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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3
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Droguett K, Quintero GE, Santos JG, Aliaga ME. Advancement in supramolecular control of organic reactivity induced by cucurbit[n]urils. J INCL PHENOM MACRO 2022. [DOI: 10.1007/s10847-022-01172-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Rad N, Sashuk V. Effect of Na + and K + on the cucurbituril-mediated hydrolysis of a phenyl acetate. Chem Commun (Camb) 2022; 58:5249-5252. [PMID: 35388837 DOI: 10.1039/d2cc00772j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The environment around the active site affects the catalytic activity of enzymes. Studying the cucurbit[7]uril-promoted acid hydrolysis of a cationic phenyl acetate derivative, we found that the hydrophobic cavity of the macrocycle screens the reaction centre from the positively charged neighbouring group. Moreover, the chelation of alkali metal cations with the cucurbit[7]uril portal and acetyl group of the substrate reduces the hydrolysis rate of the encapsulated ester in an aqueous solution. This type of inhibition corresponds to a rare uncompetitive model in contrast to the more common competitive model that relies on substrate displacement.
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Affiliation(s)
- Nazar Rad
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Volodymyr Sashuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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5
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Jin Y, Li M, Liu M, Ge Q, Cong H, Tao Z. Cucurbit[7]uril‐Catalyzed Controllable Pinacol Rearrangement with Activated Hydride Migration. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ye Jin
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Min Li
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Mao Liu
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Qingmei Ge
- Guizhou University Enterprise Technology Center of Guizhou Province Huaxi district 550025 Guiyang CHINA
| | - Hang Cong
- Guizhou University Enterprise Technology Center of Guizhou Province CHINA
| | - Zhu Tao
- Guizhou University Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province CHINA
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6
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Jin YM, Cheng SY, Huang TH, Zhao WW, Jiang DF, Gao J, Yang XN, Ma PH. Study of Supramolecular Self-Assembly between Cyclopentanocucurbit[6]uril and Lithium and Sodium Ions. CRYSTALLOGR REP+ 2021. [DOI: 10.1134/s1063774521070075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Feng X, Zhao F, Qian R, Guo M, Yang J, Yang R, Meng D. Supramolecular Catalyst Functions in Catalytic Amount: Cucurbit[7]uril Accelerates Click Reaction in Water. ChemistrySelect 2021. [DOI: 10.1002/slct.202102684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xuepu Feng
- Faculty of Science Kunming University of Science and Technology Kunming 650500 P. R. China
| | - Fen Zhao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 P. R. China
| | - Rui Qian
- Faculty of Science Kunming University of Science and Technology Kunming 650500 P. R. China
| | - Mengbi Guo
- Industrial Crop Research Institute Yunnan Academy of Agricultural Sciences Kunming 650205 P. R. China
| | - Jing Yang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 P. R. China
| | - Rui Yang
- Faculty of Science Kunming University of Science and Technology Kunming 650500 P. R. China
| | - DongLing Meng
- Technology Centre China Tobacco Guangxi Industrial Co., Ltd Nanning 53001 P. R. China
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8
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Khurana R, Mohanty J, Barooah N, Bhasikuttan AC. Photoinduced emissive naphthalenediimide radical anion in the confinement of cucurbituril nanocavity; in situ generation of gold nanoparticles. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Dutta Choudhury S, Pal H. Supramolecular and suprabiomolecular photochemistry: a perspective overview. Phys Chem Chem Phys 2021; 22:23433-23463. [PMID: 33112299 DOI: 10.1039/d0cp03981k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this perspective review article, we have attempted to bring out the important current trends of research in the areas of supramolecular and suprabiomolecular photochemistry. Since the spans of the subject areas are very vast, it is impossible to cover all the aspects within the limited space of this review article. Nevertheless, efforts have been made to assimilate the basic understanding of how supramolecular interactions can significantly change the photophysical and other related physiochemical properties of chromophoric dyes and drugs, which have enormous academic and practical implications. We have discussed with reference to relevant chemical systems where supramolecularly assisted modulations in the properties of chromophoric dyes and drugs can be used or have already been used in different areas like sensing, dye/drug stabilization, drug delivery, functional materials, and aqueous dye laser systems. In supramolecular assemblies, along with their conventional photophysical properties, the acid-base properties of prototropic dyes, as well as the excited state prototautomerization and related proton transfer behavior of proton donor/acceptor dye molecules, are also largely modulated due to supramolecular interactions, which are often reflected very explicitly through changes in their absorption and fluorescence characteristics, providing us many useful insights into these chemical systems and bringing out intriguing applications of such changes in different applied areas. Another interesting research area in supramolecular photochemistry is the excitation energy transfer from the donor to acceptor moieties in self-assembled systems which have immense importance in light harvesting applications, mimicking natural photosynthetic systems. In this review article, we have discussed varieties of these aspects, highlighting their academic and applied implications. We have tried to emphasize the progress made so far and thus to bring out future research perspectives in the subject areas concerned, which are anticipated to find many useful applications in areas like sensors, catalysis, electronic devices, pharmaceuticals, drug formulations, nanomedicine, light harvesting, and smart materials.
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Affiliation(s)
- Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India. and Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India
| | - Haridas Pal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
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10
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Shusterman-Krush R, Grimm L, Avram L, Biedermann F, Bar-Shir A. Elucidating dissociation activation energies in host-guest assemblies featuring fast exchange dynamics. Chem Sci 2020; 12:865-871. [PMID: 34163853 PMCID: PMC8179218 DOI: 10.1039/d0sc05666a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The ability to mediate the kinetic properties and dissociation activation energies (E a) of bound guests by controlling the characteristics of "supramolecular lids" in host-guest molecular systems is essential for both their design and performance. While the synthesis of such systems is well advanced, the experimental quantification of their kinetic parameters, particularly in systems experiencing fast association and dissociation dynamics, has been very difficult or impossible with the established methods at hand. Here, we demonstrate the utility of the NMR-based guest exchange saturation transfer (GEST) approach for quantifying the dissociation exchange rates (k out) and activation energy (E a,out) in host-guest systems featuring fast dissociation dynamics. Our assessment of the effect of different monovalent cations on the extracted E a,out in cucurbit[7]uril:guest systems with very fast k out highlights their role as "supramolecular lids" in mediating a guest's dissociation E a. We envision that GEST could be further extended to study kinetic parameters in other supramolecular systems characterized by fast kinetic properties and to design novel switchable host-guest assemblies.
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Affiliation(s)
| | - Laura Grimm
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Liat Avram
- Department of Chemical Research Support, Weizmann Institute of Science Rehovot 7610001 Israel
| | - Frank Biedermann
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Amnon Bar-Shir
- Department of Organic Chemistry, Weizmann Institute of Science Rehovot 7610001 Israel
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11
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Yang R, Deng X, Huang Y, Zhang Y, Tao Z. Recognition of Lanthanide Metal Cations by
t
‐DSMI@Alkyl‐Substituted Cucurbit[6]uril Probes. ChemistrySelect 2020. [DOI: 10.1002/slct.202000021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Rui‐Yu Yang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou ProvinceGuizhou University Guiyang 550025 China
| | - Xin‐Yu Deng
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou ProvinceGuizhou University Guiyang 550025 China
| | - Ying Huang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of National Education Ministry of ChinaGuizhou University Guiyang 550025 China
| | - Yun‐Qian Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou ProvinceGuizhou University Guiyang 550025 China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou ProvinceGuizhou University Guiyang 550025 China
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12
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Luis ET, Day AI, König B, Beves JE. Photophysical Activity and Host-Guest Behavior of Ruthenium Polypyridyl Catalysts Encapsulated in Cucurbit[10]uril. Inorg Chem 2020; 59:9135-9142. [PMID: 32578987 DOI: 10.1021/acs.inorgchem.0c00986] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This work outlines a strategy to combine the use of visible light and confined spaces to form a supramolecular photocatalyst system. Polypyridyl ruthenium(II) complexes [Ru(bpy)3]2+ (bpy = 2,2'-bipyridine), [Ru(bpy)2(bpm)]2+ (bpm = 2,2'-bipyrimidine), and [Ru(bpy)2(bpz)]2+ (bpz = 2,2'-bipyrazine) are encapsulated in cucurbit[10]uril to form host-guest systems in aqueous solution. The photophysical properties of the complexes are altered by encapsulation, with improved emissive behavior for the heteroleptic complexes. Oxidative quenching of the photocatalyst's excited state via intermolecular charge transfer to methyl viologen can occur within the internal cavity, which acts to preorganize the reagents. The host-guest system containing [Ru(bpy)3]2+ can bind suitable substrates, and essential criteria for its use as a supramolecular photocatalyst are investigated.
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Affiliation(s)
- Ena T Luis
- School of Chemistry, UNSW Sydney, Sydney, Australia
| | - Anthony I Day
- School of Physical, Environmental and Mathematical Sciences, UNSW Canberra, Canberra, Australia
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, Regensburg, Germany
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13
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Miskolczy Z, Megyesi M, Biczók L, Prabodh A, Biedermann F. Kinetics and Mechanism of Cation-Induced Guest Release from Cucurbit[7]uril. Chemistry 2020; 26:7433-7441. [PMID: 31943402 PMCID: PMC7318709 DOI: 10.1002/chem.201905633] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Indexed: 12/11/2022]
Abstract
The release of two organic guests from cucurbit[7]uril (CB7) was selectively monitored by the stopped‐flow method in aqueous solutions of inorganic salts to reveal the mechanistic picture in detail. Two contrasting mechanisms were identified: The symmetric dicationic 2,7‐dimethyldiazapyrenium shows a cation‐independent complex dissociation mechanism coupled to deceleration of the ingression in the presence of alkali and alkaline earth cations (Mn+) due to competitive formation of CB7–Mn+ complexes. A much richer, unprecedented kinetic behaviour was observed for the ingression and egression of the monocationic and non‐symmetric berberine (B+). The formation of ternary complex B+–CB7–Mn+ was unambiguously revealed. A difference of more than two orders of magnitude was found in the equilibrium constants of Mn+ binding to B+–CB7 inclusion complex. Large cations, such as K+ and Ba2+, also promoted B+ expulsion from the ternary complex in a bimolecular process. This study reveals a previously hidden mechanistic picture and motivates systematic kinetic investigations of other host–guest systems.
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Affiliation(s)
- Zsombor Miskolczy
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, P.O. Box 286, 1519, Budapest, Hungary
| | - Mónika Megyesi
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, P.O. Box 286, 1519, Budapest, Hungary
| | - László Biczók
- Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, P.O. Box 286, 1519, Budapest, Hungary
| | - Amrutha Prabodh
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Frank Biedermann
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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14
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Prabodh A, Sinn S, Grimm L, Miskolczy Z, Megyesi M, Biczók L, Bräse S, Biedermann F. Teaching indicators to unravel the kinetic features of host–guest inclusion complexes. Chem Commun (Camb) 2020; 56:12327-12330. [DOI: 10.1039/d0cc03715j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Three new, practically convenient methods are introduced for measuring kinetic parameters of supramolecular host–guest and protein–ligand complexes. Combined with thermodynamic data, this allows for an in-depth of the binding mechanism.
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Affiliation(s)
- Amrutha Prabodh
- Karlsruhe Institute of Technology (KIT)
- Institute of Nanotechnology (INT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Stephan Sinn
- Karlsruhe Institute of Technology (KIT)
- Institute of Nanotechnology (INT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Laura Grimm
- Karlsruhe Institute of Technology (KIT)
- Institute of Nanotechnology (INT)
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Zsombor Miskolczy
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences
- 1117 Budapest
- Hungary
| | - Mónika Megyesi
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences
- 1117 Budapest
- Hungary
| | - László Biczók
- Institute of Materials and Environmental Chemistry Research Centre for Natural Sciences
- 1117 Budapest
- Hungary
| | - Stefan Bräse
- Karlsruhe Institute of Technology (KIT)
- Institute of Organic Chemistry (IOC)
- 76131 Karlsruhe
- Germany
- Institute of Biological and Chemical Systems – Functional Molecular Systems (IBCS-FMS)
| | - Frank Biedermann
- Karlsruhe Institute of Technology (KIT)
- Institute of Nanotechnology (INT)
- 76344 Eggenstein-Leopoldshafen
- Germany
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15
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16
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Basílio N, Pessêgo M, Acuña A, García‐Río L. Sulfonatocalixarene Counterion Exchange Binding Model in Action: Metal‐Ion Catalysis Through Host‐Guest Complexation. ChemCatChem 2019. [DOI: 10.1002/cctc.201901254] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Nuno Basílio
- LAQV-REQUIMTEDepartamento de Química Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa Caparica 2829-516 Portugal
| | - Márcia Pessêgo
- LAQV-REQUIMTEDepartamento de Química Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa Caparica 2829-516 Portugal
| | - Angel Acuña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química FísicaUniversidad de Santiago Santiago 15782 Spain
| | - Luis García‐Río
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química FísicaUniversidad de Santiago Santiago 15782 Spain
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17
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Sales A, de Oliveira e Castro IA, de Menezes FD, Selva TMG, Vilar M. Cucurbit[5]uril-mediated electrochemical hydrogenation of α,β-unsaturated ketones. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00944-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Yin H, Cheng Q, Rosas R, Viel S, Monnier V, Charles L, Siri D, Gigmes D, Ouari O, Wang R, Kermagoret A, Bardelang D. A Cucurbit[8]uril 2:2 Complex with a Negative pK a Shift. Chemistry 2019; 25:12552-12559. [PMID: 31286592 DOI: 10.1002/chem.201902057] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/13/2019] [Indexed: 12/22/2022]
Abstract
A viologen derivative carrying a benzimidazole group (V-P-I 2+ ; viologen-phenylene-imidazole V-P-I) can be dimerized in water using cucurbit[8]uril (CB[8]) in the form of a 2:2 complex resulting in a negative shift of the guest pKa , by more than 1 pH unit, contrasting with the positive pKa shift usually observed for CB-based complexes. Whereas 2:2 complex protonation is unclear by NMR, silver cations have been used for probing the accessibility of the imidazole groups of the 2:2 complexes. The protonation capacity of the buried imidazole groups is reduced, suggesting that CB[8] could trigger proton release upon 2:2 complex formation. The addition of CB[8] to a solution containing V-P- I3+ indeed released protons as monitored by pH-metry and visualized by a coloured indicator. This property was used to induce a host/guest swapping, accompanied by a proton transfer, between V-P-I 3+ ⋅CB[7] and a CB[8] complex of 1-methyl-4-(4-pyridyl)pyridinium. The origin of this negative pKa shift is proposed to stand in an ideal charge state, and in the position of the two pH-responsive fragments inside the two CB[8] which, alike residues engulfed in proteins, favour the deprotonated form of the guest molecules. Such proton release triggered by a recognition event is reminiscent of several biological processes and may open new avenues toward bioinspired enzyme mimics catalyzing proton transfer or chemical reactions.
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Affiliation(s)
- Hang Yin
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | - Qian Cheng
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | - Roselyne Rosas
- Aix Marseille Univ, CNRS, Spectropole, FR 1739, Marseille, France
| | - Stéphane Viel
- Aix Marseille Univ, CNRS, ICR, Marseille, France.,Institut Universitaire de France, Paris, France
| | - Valérie Monnier
- Aix Marseille Univ, CNRS, Spectropole, FR 1739, Marseille, France
| | | | - Didier Siri
- Aix Marseille Univ, CNRS, ICR, Marseille, France
| | | | | | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
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19
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Xu L, Fang G, Yu Y, Ma Y, Ye Z, Li Z. Molecular mechanism of heterogeneous supramolecular catalysis of metal-free cucurbituril solid for epoxide alcoholysis. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.01.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Deng XY, Chen K, Chen MD, Lü LB, Tao Z. Recognition of Different Metal Cations by a trans
-4-[4-(Dimethylamino)styryl]-1-methylpyridinium Iodide@Tetramethylcucurbit[6]uril Probe. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801398] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xin Yu Deng
- Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province; Guizhou University; 550025 Guiyang China
| | - Kai Chen
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control; School of Environmental Science and Engineering; Nanjing University of Information Science & Technology; 210044 Nanjing China
| | - Ming-Dong Chen
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control; School of Environmental Science and Engineering; Nanjing University of Information Science & Technology; 210044 Nanjing China
| | - Li Bin Lü
- Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province; Guizhou University; 550025 Guiyang China
| | - Zhu Tao
- Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province; Guizhou University; 550025 Guiyang China
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21
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Mouarrawis V, Plessius R, van der Vlugt JI, Reek JNH. Confinement Effects in Catalysis Using Well-Defined Materials and Cages. Front Chem 2018; 6:623. [PMID: 30622940 PMCID: PMC6308152 DOI: 10.3389/fchem.2018.00623] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 11/30/2018] [Indexed: 11/28/2022] Open
Abstract
This review focuses on the effects that confinement of molecular and heterogeneous catalysts with well-defined structure has on the selectivity and activity of these systems. A general introduction about catalysis and how the working principles of enzymes can be used as a source of inspiration for the preparation of catalysts with enhanced performance is provided. Subsequently, relevant studies demonstrate the importance of second coordination sphere effects in a broad sense (in homogeneous and heterogeneous catalysis). Firstly, we discuss examples involving zeolites, MOFs and COFs as heterogeneous catalysts with well-defined structures where confinement influences catalytic performance. Then, specific cases of homogeneous catalysts where non-covalent interactions determine the selectivity and activity are treated in detail. This includes examples based on cyclodextrins, calix[n]arenes, cucurbit[n]urils, and self-assembled container molecules. Throughout the review, the impact of confined spaces is emphasized and put into context, in order to get a better understanding of the effects of confinement on catalyst performance. In addition, this analysis intends to showcase the similarities between homogeneous and heterogeneous catalysts, which may aid the development of novel strategies.
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Affiliation(s)
| | | | - Jarl Ivar van der Vlugt
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Netherlands
| | - Joost N. H. Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group, Van 't Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Amsterdam, Netherlands
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22
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Scorsin L, Roehrs JA, Campedelli RR, Caramori GF, Ortolan AO, Parreira RLT, Fiedler HD, Acuña A, García-Río L, Nome F. Cucurbituril-Mediated Catalytic Hydrolysis: A Kinetic and Computational Study with Neutral and Cationic Dioxolanes in CB7. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03605] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Leandro Scorsin
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
| | - Juliano A. Roehrs
- Instituto Federal de Educação Ciência e Tecnologia Sul-rio-grandense - IFSul, Pelotas, Rio Grande do Sul 96015-360, Brazil
| | - Roberta R. Campedelli
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
| | - Giovanni F. Caramori
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
| | - Alexandre O. Ortolan
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
| | - Renato L. T. Parreira
- Núcleo de Pesquisa em Ciências Exatas e Tecnológicas, Universidade de Franca, Franca, São Paulo 14404-600, Brazil
| | - Haidi D. Fiedler
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
| | - Angel Acuña
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Física, Universidade de Santiago, 15782 Santiago, Spain
| | - Luis García-Río
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Física, Universidade de Santiago, 15782 Santiago, Spain
| | - Faruk Nome
- Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis Santa Catarina 88040-900, Brazil
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23
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Tang X, Huang Z, Chen H, Kang Y, Xu J, Zhang X. Supramolecularly Catalyzed Polymerization: From Consecutive Dimerization to Polymerization. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803749] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Xiaoyan Tang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Zehuan Huang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Hao Chen
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yuetong Kang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jiang‐Fei Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
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24
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Tang X, Huang Z, Chen H, Kang Y, Xu J, Zhang X. Supramolecularly Catalyzed Polymerization: From Consecutive Dimerization to Polymerization. Angew Chem Int Ed Engl 2018; 57:8545-8549. [DOI: 10.1002/anie.201803749] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Xiaoyan Tang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Zehuan Huang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Hao Chen
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yuetong Kang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jiang‐Fei Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
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25
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Atashkar B, Zolfigol MA, Mallakpour S. Applications of biological urea-based catalysts in chemical processes. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.03.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Jiao Y, Tang B, Zhang Y, Xu J, Wang Z, Zhang X. Highly Efficient Supramolecular Catalysis by Endowing the Reaction Intermediate with Adaptive Reactivity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713351] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yang Jiao
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Bohan Tang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yucheng Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jiang‐Fei Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Zhiqiang Wang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 China
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27
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Jiao Y, Tang B, Zhang Y, Xu JF, Wang Z, Zhang X. Highly Efficient Supramolecular Catalysis by Endowing the Reaction Intermediate with Adaptive Reactivity. Angew Chem Int Ed Engl 2018; 57:6077-6081. [PMID: 29644773 DOI: 10.1002/anie.201713351] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Indexed: 12/17/2022]
Abstract
A new strategy of highly efficient supramolecular catalysis is developed by endowing the reaction intermediate with adaptive reactivity. The supramolecular catalyst, prepared by host-guest complexation between 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) and cucurbit[7]uril (CB[7]), was used for biphasic oxidation of alcohols. Cationic TEMPO+ , the key intermediate, was stabilized by the electrostatic effect of CB[7] in aqueous phase, thus promoting the formation of TEMPO+ and inhibiting side reactions. Moreover, through the migration into the organic phase, TEMPO+ was separated from CB[7] and recovered the high reactivity to drive a fast oxidation of substrates. The adaptive reactivity of TEMPO+ induced an integral optimization of the catalytic cycle and greatly improved the conversion of the reaction. This work highlights the unique advantages of dynamic noncovalent interactions on modulating the activity of reaction intermediates, which may open new horizons for supramolecular catalysis.
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Affiliation(s)
- Yang Jiao
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Bohan Tang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Yucheng Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Jiang-Fei Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Zhiqiang Wang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China
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28
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Affiliation(s)
- Eric Masson
- Department of Chemistry and Biochemistry Ohio University Athens, Ohio 45701 USA
| | - Mersad Raeisi
- Department of Chemistry and Biochemistry Ohio University Athens, Ohio 45701 USA
| | - Kondalarao Kotturi
- Department of Chemistry and Biochemistry Ohio University Athens, Ohio 45701 USA
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29
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Wang CH, Tang Q, Zhang J, Yao YQ, Xiao X, Huang Y, Tao Z. Alkaline earth cation-mediated photoluminescent complexes of thioflavin T with twisted cucurbit[14]uril. NEW J CHEM 2018. [DOI: 10.1039/c7nj04115b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The introduction of alkaline earth metal cations into the tQ[14]–ThT interaction system leds to the precipitation of solid tQ[14]/ThT/AE2+ interaction products, which emitted strong blue fluorescence.
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Affiliation(s)
- Cheng-Hui Wang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of the National Education Ministry of China
- Guizhou University
- Guiyang 550025
- China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
| | - Qing Tang
- College of Tobacco of Guizhou University
- Guizhou University
- Guiyang 550025
- China
| | - Jing Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Yu-Qing Yao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Xin Xiao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
| | - Ying Huang
- The Engineering and Research Center for Southwest Bio-Pharmaceutical Resources of the National Education Ministry of China
- Guizhou University
- Guiyang 550025
- China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang 550025
- China
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30
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Assaf KI, Florea M, Antony J, Henriksen NM, Yin J, Hansen A, Qu ZW, Sure R, Klapstein D, Gilson MK, Grimme S, Nau WM. HYDROPHOBE Challenge: A Joint Experimental and Computational Study on the Host-Guest Binding of Hydrocarbons to Cucurbiturils, Allowing Explicit Evaluation of Guest Hydration Free-Energy Contributions. J Phys Chem B 2017; 121:11144-11162. [PMID: 29140701 DOI: 10.1021/acs.jpcb.7b09175] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The host-guest complexation of hydrocarbons (22 guest molecules) with cucurbit[7]uril was investigated in aqueous solution using the indicator displacement strategy. The binding constants (103-109 M-1) increased with guest size, pointing to the hydrophobic effect and dispersion interactions as driving forces. The measured affinities provide unique benchmark data for the binding of neutral guest molecules. Consequently, a computational blind challenge, the HYDROPHOBE challenge, was conducted to allow a comparison with state-of-the-art computational methods for predicting host-guest affinity constants. In total, three quantum-chemical (QM) data sets and two explicit-solvent molecular dynamics (MD) submissions were received. When searching for sources of uncertainty in predicting the host-guest affinities, the experimentally known hydration energies of the investigated hydrocarbons were used to test the employed solvation models (explicit solvent for MD and COSMO-RS for QM). Good correlations were obtained for both solvation models, but a rather constant offset was observed for the COSMO data, by ca. +2 kcal mol-1, which was traced back to a required reference-state correction in the QM submissions (2.38 kcal mol-1). Introduction of the reference-state correction improved the predictive power of the QM methods, particularly for small hydrocarbons up to C5.
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Affiliation(s)
- Khaleel I Assaf
- Department of Life Sciences and Chemistry, Jacobs University Bremen , Campus Ring 1, 28759 Bremen, Germany
| | - Mara Florea
- Department of Life Sciences and Chemistry, Jacobs University Bremen , Campus Ring 1, 28759 Bremen, Germany
| | - Jens Antony
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn , Beringstr. 4, D-53115 Bonn, Germany
| | - Niel M Henriksen
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego , 9500 Gilman Drive, MC 0736, La Jolla, California 92093-0736, United States
| | - Jian Yin
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego , 9500 Gilman Drive, MC 0736, La Jolla, California 92093-0736, United States
| | - Andreas Hansen
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn , Beringstr. 4, D-53115 Bonn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn , Beringstr. 4, D-53115 Bonn, Germany
| | - Rebecca Sure
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn , Beringstr. 4, D-53115 Bonn, Germany
| | - Dieter Klapstein
- Department of Chemistry, St. Francis Xavier University , P.O. Box 5000, Antigonish, Nova Scotia, Canada B2G 2W5
| | - Michael K Gilson
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego , 9500 Gilman Drive, MC 0736, La Jolla, California 92093-0736, United States
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn , Beringstr. 4, D-53115 Bonn, Germany
| | - Werner M Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen , Campus Ring 1, 28759 Bremen, Germany
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31
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Wiemann M, Jonkheijm P. Stimuli-Responsive Cucurbit[n]uril-Mediated Host-Guest Complexes on Surfaces. Isr J Chem 2017. [DOI: 10.1002/ijch.201700109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Maike Wiemann
- Bioinspired Molecular Engineering Laboratory of the MIRA Institute of Biomedical Technology and Technical Medicine and the Molecular Nanofabrication Group of the MESA Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
| | - Pascal Jonkheijm
- Bioinspired Molecular Engineering Laboratory of the MIRA Institute of Biomedical Technology and Technical Medicine and the Molecular Nanofabrication Group of the MESA Institute for Nanotechnology; University of Twente; P.O. Box 217 7500 AE Enschede The Netherlands
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32
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Chakraborty D, Chattaraj PK. Confinement induced thermodynamic and kinetic facilitation of some Diels-Alder reactions inside a CB[7] cavitand. J Comput Chem 2017; 39:151-160. [PMID: 29094421 DOI: 10.1002/jcc.25094] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 10/16/2017] [Indexed: 01/07/2023]
Abstract
The effect of geometrical confinement on the Diels-Alder reactions between some model dienes viz. furan, thiophene, cyclopentadiene, benzene, and a classic dienophile, ethylene has been explored by performing density functional theory-based calculations. The effect of confinement has been imposed by a rigid macrocyclic molecule cucurbit[7]uril (CB[7]). Results indicate that all the reactions become thermodynamically more favorable at 298.15 K temperature and one atmospheric pressure inside CB[7] as compared to the corresponding free gaseous state reactions. Moreover, the rate constants associated with the reactions experience manifold enhancement inside CB[7] as compared to the "unconfined" reactions. Suitable contribution from the entropy factor makes the concerned reactions more facile inside CB[7]. The energy gap between the frontier molecular orbitals of the dienes and dienophiles decrease inside CB[7] as compared to that in the free state reactions thereby allowing facile orbital interactions. The nature of interaction as well as bonding has been analyzed with the help of atoms-in-molecules, noncovalent interaction, natural bond orbital as well as energy decomposition analyses. Results suggest that all the guests bind with CB[7] in an attractive fashion. Primarily, noncovalent interactions stabilize the host-guest systems. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Debdutta Chakraborty
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, West Bengal, 721302, India
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33
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Cucurbit[n]uril-based host–guest-metal ion chemistry: an emerging branch in cucurbit[n]uril chemistry. J INCL PHENOM MACRO 2017. [DOI: 10.1007/s10847-017-0733-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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34
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Qu YX, Zhang YQ, Zhou KZ, Wei LT, Zhan LL, Cheng SY, Tao Z, Ma PH. Interaction of Cyclopentano Cucurbit[6]uril with Alkaline Earth Cations and Supramolecular Assemblies with Aid of [ZnCl 4
] 2-. ChemistrySelect 2017. [DOI: 10.1002/slct.201700699] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yun Xia Qu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Yun Qian Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Kai Zhi Zhou
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Lian Tong Wei
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Lin Ling Zhan
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Si Yuan Cheng
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Zhu Tao
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
| | - Pei Hua Ma
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University; Guizhou University; Guiyang 550025 China
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35
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Carvalho CP, Domínguez Z, Domínguez C, El‐Sheshtawy HS, Silva JPD, Arteaga JF, Pischel U. Five-Component Self-Assembly of Cucurbituril-Based Hetero-pseudorotaxanes. ChemistryOpen 2017; 6:288-294. [PMID: 28413766 PMCID: PMC5390802 DOI: 10.1002/open.201600173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Indexed: 12/16/2022] Open
Abstract
[5]Pseudorotaxanes can be obtained by self-sorting using heteroditopic guests and various cucurbituril homologues as hosts. The assembly and chemically induced disassembly of the pseudorotaxanes can be monitored by measuring the fluorescence of the anthracene guest in solution. Mass spectral evidence for the supramolecular assemblies is obtained in the gas phase. The disassembly in the gas phase can be achieved by collision-induced dissociation leading to the corresponding [2]- and [3]pseudorotaxanes.
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Affiliation(s)
- Cátia Parente Carvalho
- CIQSO—Center for Research in Sustainable Chemistry and Department of ChemistryUniversity of Huelva, Campus de El Carmen21071HuelvaSpain
| | - Zoe Domínguez
- CIQSO—Center for Research in Sustainable Chemistry and Department of ChemistryUniversity of Huelva, Campus de El Carmen21071HuelvaSpain
| | - Cristina Domínguez
- CIQSO—Center for Research in Sustainable Chemistry and Department of ChemistryUniversity of Huelva, Campus de El Carmen21071HuelvaSpain
| | - Hamdy S. El‐Sheshtawy
- Chemistry Department, Faculty of ScienceKafrelsheikh University33516Kafr ElSheikhEgypt
| | - José Paulo Da Silva
- Meditbio—Faculty of Sciences and TechnologyUniversity of Algarve, Campus de Gambelas8005-139FaroPortugal
| | - Jesús F. Arteaga
- CIQSO—Center for Research in Sustainable Chemistry and Department of ChemistryUniversity of Huelva, Campus de El Carmen21071HuelvaSpain
| | - Uwe Pischel
- CIQSO—Center for Research in Sustainable Chemistry and Department of ChemistryUniversity of Huelva, Campus de El Carmen21071HuelvaSpain
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36
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Li TT, Wen LL, Ji HL, Liu FY, Sun SG. Bromination of N -phenyloxypropyl- N ′-ethyl-4,4′-bipyridium in cucurbit[8]uril molecular reactor. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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37
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Chandra F, Mallick S, Koner AL. Spectroscopic investigation of bio-mimetic solvolysis of 6-(N,N-dimethylamino)-2,3-naphthalic anhydride in confined nanocavities. Phys Chem Chem Phys 2017; 19:4337-4344. [DOI: 10.1039/c6cp08009j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Enzymes are biological catalysts that can vastly accelerate the reaction rate of a substrate by accommodating it within the active site.
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Affiliation(s)
- Falguni Chandra
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal-462066
- India
| | - Suman Mallick
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal-462066
- India
| | - Apurba L. Koner
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal-462066
- India
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38
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Chandra F, Pal K, Koner AL. Tailoring Emission Properties Using Macrocyclic NanocavitiesviaGuest Interplay in Aqueous Solution. ChemistrySelect 2016. [DOI: 10.1002/slct.201601533] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Falguni Chandra
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal ByPass Road, Bhauri Bhopal, Madhya Pradesh 462066 INDIA
| | - Kaushik Pal
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal ByPass Road, Bhauri Bhopal, Madhya Pradesh 462066 INDIA
| | - Apurba L. Koner
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal ByPass Road, Bhauri Bhopal, Madhya Pradesh 462066 INDIA
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39
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Gong W, Yang X, Zavalij PY, Isaacs L, Zhao Z, Liu S. From Packed "Sandwich" to "Russian Doll": Assembly by Charge-Transfer Interactions in Cucurbit[10]uril. Chemistry 2016; 22:17612-17618. [PMID: 27862408 DOI: 10.1002/chem.201604149] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Indexed: 12/12/2022]
Abstract
As the host possessing the largest cavity in the cucurbit[n]uril (CB[n]) family, CB[10] has previously displayed unusual recognition and assembly properties with guests but much remains to be explored. Herein, we present the recognition properties of CB[10] toward a series of bipyridinium guests including the tetracationic cyclophane known as blue box along with electron-rich guests and detail the influence of encapsulation on the charge-transfer interactions between guests. For the mono-bipyridinium guest (methylviologen, MV2+ ), CB[10] not only forms 1:1 and 1:2 inclusion complexes, but also enhances the charge-transfer interactions between methylviologen and dihydroxynaphthalene (HN) by mainly forming the 1:2:1 packed "sandwich" complex (CB[10]⋅2 MV2+ ⋅HN). For guest 1 with two bipyridinium units, an interesting conformational switching from linear to "U" shape is observed by adding catechol to the solution of CB[10] and the guest. For the tetracationic cyclophane-blue box, CB[10] forms a stable 1:1 inclusion complex; the two bipyridinium units tilt inside the cavity of CB[10] according to the X-ray crystal structure. Finally, a supramolecular "Russian doll" was built up by threading a guest through the cavities of both blue box and CB[10].
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Affiliation(s)
- Wanjun Gong
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China
| | - Xiran Yang
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China
| | - Peter Y Zavalij
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - Lyle Isaacs
- Department of Chemistry and Biochemistry, University of Maryland, College Park, MD, 20742, USA
| | - Zhiyong Zhao
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China
| | - Simin Liu
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China.,The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China
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40
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Sashuk V, Butkiewicz H, Fiałkowski M, Danylyuk O. Triggering autocatalytic reaction by host-guest interactions. Chem Commun (Camb) 2016; 52:4191-4. [PMID: 26906073 DOI: 10.1039/c5cc10063a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The acceleration of a sequential reaction through electrostatic alteration of substrate basicity within a supramolecular host is demonstrated. In the presence of the host, the reaction, which is autocatalytic, starts much sooner and exhibits substrate size selectivity.
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Affiliation(s)
- Volodymyr Sashuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Helena Butkiewicz
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Marcin Fiałkowski
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Oksana Danylyuk
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
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41
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Mallick S, Pal K, Chandra F, Koner AL. Investigation of the effect of cucurbit[7]uril complexation on the photophysical and acid–base properties of the antimalarial drug quinine. Phys Chem Chem Phys 2016; 18:30520-30529. [DOI: 10.1039/c6cp04931a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Tuning the physico-chemical properties of an anti-malarial drug upon cucurbit[7]uril encapsulation.
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Affiliation(s)
- Suman Mallick
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhauri
- India
| | - Kaushik Pal
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhauri
- India
| | - Falguni Chandra
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhauri
- India
| | - Apurba L. Koner
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhauri
- India
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42
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Chandra F, Pal K, Lathwal S, Koner AL. Supramolecular guest relay using host-protein nanocavities: an application of host-induced guest protonation. MOLECULAR BIOSYSTEMS 2016; 12:2859-66. [DOI: 10.1039/c6mb00423g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Small drug molecules and other important metabolites are delivered via a suitable carrier protein-mediated transport through a specific receptor.
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Affiliation(s)
- Falguni Chandra
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal
- India
| | - Kaushik Pal
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal
- India
| | - Sushil Lathwal
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal
- India
| | - Apurba L. Koner
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal
- India
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43
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Yu H, He C, Xu J, Duan C, Reek JNH. Metal–organic redox vehicles to encapsulate organic dyes for photocatalytic protons and carbon dioxide reduction. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00211k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By encapsulation of an organic dye, a supramolecular nickel–organic macrocycle for the photocatalytic reduction of protons and CO2 has been reported.
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Affiliation(s)
- Hao Yu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology Dalian
- China
| | - Cheng He
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology Dalian
- China
| | - Jing Xu
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology Dalian
- China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals
- Dalian University of Technology Dalian
- China
| | - Joost N. H. Reek
- Homogeneous and Supramolecular Catalysis Group
- Van't Hoff Institute for Molecular Science
- University of Amsterdam
- 1098 XH Amsterdam
- The Netherlands
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44
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Barrow SJ, Kasera S, Rowland MJ, del Barrio J, Scherman OA. Cucurbituril-Based Molecular Recognition. Chem Rev 2015; 115:12320-406. [DOI: 10.1021/acs.chemrev.5b00341] [Citation(s) in RCA: 1188] [Impact Index Per Article: 132.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Steven J. Barrow
- Melville
Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Setu Kasera
- Melville
Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Matthew J. Rowland
- Melville
Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Jesús del Barrio
- Melville
Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Oren A. Scherman
- Melville
Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
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45
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Zheng L, Sonzini S, Ambarwati M, Rosta E, Scherman OA, Herrmann A. Turning Cucurbit[8]uril into a Supramolecular Nanoreactor for Asymmetric Catalysis. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 127:13199-13203. [PMID: 27478269 PMCID: PMC4955226 DOI: 10.1002/ange.201505628] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/10/2015] [Indexed: 11/06/2022]
Abstract
Chiral macromolecules have been widely used as synthetic pockets to mimic natural enzymes and promote asymmetric reactions. An achiral host, cucurbit[8]uril (CB[8]), was used for an asymmetric Lewis acid catalyzed Diels-Alder reaction. We achieved a remarkable increase in enantioselectivity and a large rate acceleration in the presence of the nanoreactor by using an amino acid as the chiral source. Mechanistic and computational studies revealed that both the amino acid-Cu2+ complex and the dienophile substrate are included inside the macrocyclic host cavity, suggesting that contiguity and conformational constraints are fundamental to the catalytic process and rate enhancement. These results pave the way towards new studies on asymmetric reactions catalyzed in confined achiral cavities.
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Affiliation(s)
- Lifei Zheng
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Silvia Sonzini
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Masyitha Ambarwati
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Edina Rosta
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB (UK)
| | - Oren A. Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Andreas Herrmann
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
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46
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Saleh N, Al-Handawi MB, Bufaroosha MS, Assaf KI, Nau WM. Tuning protonation states of tripelennamine antihistamines by cucurbit[7]uril. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3504] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Na'il Saleh
- Chemistry Department, College of Science; United Arab Emirates University; Al-Ain United Arab Emirates
| | - Marieh B. Al-Handawi
- Chemistry Department, College of Science; United Arab Emirates University; Al-Ain United Arab Emirates
| | - Muna S. Bufaroosha
- Chemistry Department, College of Science; United Arab Emirates University; Al-Ain United Arab Emirates
| | - Khaleel I. Assaf
- Department of Life Sciences and Chemistry; Jacobs University Bremen; Campus Ring 1 D-28759 Bremen Germany
| | - Werner M. Nau
- Department of Life Sciences and Chemistry; Jacobs University Bremen; Campus Ring 1 D-28759 Bremen Germany
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47
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Zheng L, Sonzini S, Ambarwati M, Rosta E, Scherman OA, Herrmann A. Turning Cucurbit[8]uril into a Supramolecular Nanoreactor for Asymmetric Catalysis. Angew Chem Int Ed Engl 2015; 54:13007-11. [PMID: 26383272 PMCID: PMC4643185 DOI: 10.1002/anie.201505628] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/10/2015] [Indexed: 12/14/2022]
Abstract
Chiral macromolecules have been widely used as synthetic pockets to mimic natural enzymes and promote asymmetric reactions. An achiral host, cucurbit[8]uril (CB[8]), was used for an asymmetric Lewis acid catalyzed Diels–Alder reaction. We achieved a remarkable increase in enantioselectivity and a large rate acceleration in the presence of the nanoreactor by using an amino acid as the chiral source. Mechanistic and computational studies revealed that both the amino acid–Cu2+ complex and the dienophile substrate are included inside the macrocyclic host cavity, suggesting that contiguity and conformational constraints are fundamental to the catalytic process and rate enhancement. These results pave the way towards new studies on asymmetric reactions catalyzed in confined achiral cavities.
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Affiliation(s)
- Lifei Zheng
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Silvia Sonzini
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK)
| | - Masyitha Ambarwati
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Edina Rosta
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB (UK)
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, Cambridge University, Lensfield Road, Cambridge CB2 1EW (UK).
| | - Andreas Herrmann
- Department of Polymer Chemistry, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands).
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48
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Cong H, Chen Q, Geng Q, Tao Z, Yamato T. IBX Oxidation of Benzenedimethanols in the Presence of Cucurbit[8]uril. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201400886] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Jing X, He C, Yang Y, Duan C. A metal-organic tetrahedron as a redox vehicle to encapsulate organic dyes for photocatalytic proton reduction. J Am Chem Soc 2015; 137:3967-74. [PMID: 25738748 DOI: 10.1021/jacs.5b00832] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The design of artificial systems that mimic highly evolved and finely tuned natural photosynthetic systems is a subject of intensive research. We report herein a new approach to constructing supramolecular systems for the photocatalytic generation of hydrogen from water by encapsulating an organic dye molecule into the pocket of a redox-active metal-organic polyhedron. The assembled neutral Co4L4 tetrahedron consists of four ligands and four cobalt ions that connect together in alternating fashion. The cobalt ions are coordinated by three thiosemicarbazone NS chelators and exhibit a redox potential suitable for electrochemical proton reduction. The close proximity between the redox site and the photosensitizer encapsulated in the pocket enables photoinduced electron transfer from the excited state of the photosensitizer to the cobalt-based catalytic sites via a powerful pseudo-intramolecular pathway. The modified supramolecular system exhibits TON values comparable to the highest values reported for related cobalt/fluorescein systems. Control experiments based on a smaller tetrahedral analogue of the vehicle with a filled pocket and a mononuclear compound resembling the cobalt corner of the tetrahedron suggest an enzymatic dynamics behavior. The new, well-elucidated reaction pathways and the increased molarity of the reaction within the confined space render these supramolecular systems superior to other relevant systems.
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Affiliation(s)
- Xu Jing
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Cheng He
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Yang Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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50
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Phosphate ester hydrolysis catalyzed by a dinuclear cobalt(II) complex equipped with intramolecular β-cyclodextrins. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2014.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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