1
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Alešković M, Šekutor M. Overcoming barriers with non-covalent interactions: supramolecular recognition of adamantyl cucurbit[ n]uril assemblies for medical applications. RSC Med Chem 2024; 15:433-471. [PMID: 38389878 PMCID: PMC10880950 DOI: 10.1039/d3md00596h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 11/30/2023] [Indexed: 02/24/2024] Open
Abstract
Adamantane, a staple in medicinal chemistry, recently became a cornerstone of a supramolecular host-guest drug delivery system, ADA/CB[n]. Owing to a good fit between the adamantane cage and the host cavity of the cucurbit[n]uril macrocycle, formed strong inclusion complexes find applications in drug delivery and controlled drug release. Note that the cucurbit[n]uril host is not solely a delivery vehicle of the ADA/CB[n] system but rather influences the bioactivity and bioavailability of drug molecules and can tune drug properties. Namely, as host-guest interactions are capable of changing the intrinsic properties of the guest molecule, inclusion complexes can become more soluble, bioavailable and more resistant to metabolic conditions compared to individual non-complexed molecules. Such synergistic effects have implications for practical bioapplicability of this complex system and provide a new viewpoint to therapy, beyond the traditional single drug molecule approach. By achieving a balance between guest encapsulation and release, the ADA/CB[n] system has also found use beyond just drug delivery, in fields like bioanalytics, sensing assays, bioimaging, etc. Thus, chemosensing in physiological conditions, indicator displacement assays, in vivo diagnostics and hybrid nanostructures are just some recent examples of the ADA/CB[n] applicability, be it for displacements purposes or as cargo vehicles.
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Affiliation(s)
- Marija Alešković
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute Bijenička 54 10 000 Zagreb Croatia
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2
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Hazarika B, Singh VP. Macrocyclic supramolecular biomaterials in anti-cancer therapeutics. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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3
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Jones LM, Super EH, Batt LJ, Gasbarri M, Coppola F, Bhebhe LM, Cheesman BT, Howe AM, Král P, Coulston R, Jones ST. Broad-Spectrum Extracellular Antiviral Properties of Cucurbit[ n]urils. ACS Infect Dis 2022; 8:2084-2095. [PMID: 36062478 PMCID: PMC9578052 DOI: 10.1021/acsinfecdis.2c00186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Viruses are microscopic pathogens capable of causing disease and are responsible for a range of human mortalities and morbidities worldwide. They can be rendered harmless or destroyed with a range of antiviral chemical compounds. Cucurbit[n]urils (CB[n]s) are a family of macrocycle chemical compounds existing as a range of homologues; due to their structure, they can bind to biological materials, acting as supramolecular "hosts" to "guests", such as amino acids. Due to the increasing need for a nontoxic antiviral compound, we investigated whether cucurbit[n]urils could act in an antiviral manner. We have found that certain cucurbit[n]uril homologues do indeed have an antiviral effect against a range of viruses, including herpes simplex virus 2 (HSV-2), respiratory syncytial virus (RSV) and SARS-CoV-2. In particular, we demonstrate that CB[7] is the active homologue of CB[n], having an antiviral effect against enveloped and nonenveloped species. High levels of efficacy were observed with 5 min contact times across different viruses. We also demonstrate that CB[7] acts with an extracellular virucidal mode of action via host-guest supramolecular interactions between viral surface proteins and the CB[n] cavity, rather than via cell internalization or a virustatic mechanism. This finding demonstrates that CB[7] acts as a supramolecular virucidal antiviral (a mechanism distinct from other current extracellular antivirals), demonstrating the potential of supramolecular interactions for future antiviral disinfectants.
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Affiliation(s)
- Luke M. Jones
- Department
of Materials and The Henry Royce Institute, The University of Manchester, Manchester M19 3PL, United
Kingdom
| | - Elana H. Super
- Department
of Materials and The Henry Royce Institute, The University of Manchester, Manchester M19 3PL, United
Kingdom
| | - Lauren J. Batt
- Department
of Materials and The Henry Royce Institute, The University of Manchester, Manchester M19 3PL, United
Kingdom
| | - Matteo Gasbarri
- Institute
of Materials, Interfaculty Bioengineering
Institute, MXG 030 Lausanne, Switzerland
| | - Francesco Coppola
- Department
of Chemistry, University of Illinois at
Chicago, Chicago, Illinois 60607, United States
| | - Lorraine M. Bhebhe
- Department
of Materials and The Henry Royce Institute, The University of Manchester, Manchester M19 3PL, United
Kingdom
| | - Benjamin T. Cheesman
- Aqdot
Limited, Iconix Park,
London Road, Pampisford, Cambridge CB22 3EG, United Kingdom
| | - Andrew M. Howe
- Aqdot
Limited, Iconix Park,
London Road, Pampisford, Cambridge CB22 3EG, United Kingdom
| | - Petr Král
- Department
of Chemistry, University of Illinois at
Chicago, Chicago, Illinois 60607, United States,Department
of Physics and Department of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Roger Coulston
- Aqdot
Limited, Iconix Park,
London Road, Pampisford, Cambridge CB22 3EG, United Kingdom
| | - Samuel T. Jones
- Department
of Materials and The Henry Royce Institute, The University of Manchester, Manchester M19 3PL, United
Kingdom,
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4
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Wang Z, Sun C, Yang K, Chen X, Wang R. Cucurbituril‐Based Supramolecular Polymers for Biomedical Applications. Angew Chem Int Ed Engl 2022; 61:e202206763. [DOI: 10.1002/anie.202206763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ziyi Wang
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences University of Macau Macau 999078 China
| | - Chen Sun
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences University of Macau Macau 999078 China
| | - Kuikun Yang
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences University of Macau Macau 999078 China
| | - Xiaoyuan Chen
- Departments of Diagnostic Radiology, Surgery Chemical and Biomolecular Engineering and Biomedical Engineering Yong Loo Lin School of Medicine and Faculty of Engineering National University of Singapore Singapore 119074 Singapore
- Clinical Imaging Research Centre Centre for Translational Medicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117599 Singapore
- Nanomedicine Translational Research Program NUS Center for Nanomedicine Yong Loo Lin School of Medicine National University of Singapore Singapore 117597 Singapore
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical Sciences University of Macau Macau 999078 China
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5
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Wang Z, Sun C, Yang K, Chen X, Wang R. Cucurbituril‐based Supramolecular Polymers for Biomedical Applications. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ziyi Wang
- University of Macau School of Pharmacy MACAU
| | - Chen Sun
- University of Macau School of Pharmacy MACAU
| | - Kuikun Yang
- University of Macau School of Pharmacy MACAU
| | - Xiaoyuan Chen
- National University of Singapore School of Medicine and Faculty of Engineering 10 Medical Dr 117597 Singapore SINGAPORE
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Kanth P C, Trivedi MU, Patel K, Misra NM, Pandey MK. Cucurbituril-Functionalized Nanocomposite as a Promising Industrial Adsorbent for Rapid Cationic Dye Removal. ACS OMEGA 2021; 6:3024-3036. [PMID: 33553920 PMCID: PMC7860087 DOI: 10.1021/acsomega.0c05400] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 01/05/2021] [Indexed: 05/27/2023]
Abstract
A supramolecular cucurbit[6]uril (CB[6])-enriched magnetic montmorillonite (CBCM) nanocomposite was prepared and characterized. CB[6] played a prominent role as a capping agent, helping in better distribution of the nanoparticles, and as a binder between nanoparticles. Montmorillonite provided structural stability and fortified ultrafast adsorption toward dyes. Its application in the removal of cationic dyes from wastewater was systematically assessed. Process parameters such as pH, initial dye concentration, dosage, temperature, and time were optimized. Kinetics and isotherms of the process were described using pseudo-second-order kinetics and the Langmuir isotherm, respectively. CBCM exhibited rapid dye removal capacity in short reaction times with q max of 199.20, 78.31, and 55.62 mg g-1 and K2 of 0.0281, 0.0.0823, and 0.0953 L mg-1 min-1 for crystal violet, methylene blue, and rhodamine B, respectively. Benefiting from the synergetic effects of montmorillonite surface hydrophobicity, abundant carbonyl groups of CB[6], and magnetic properties of copper ferrite, CBCM demonstrated outstanding dye removal capacity, negligible leaching at saturation, and high tolerance toward harsh conditions. This intrinsic nature is expedient in prolonged industrial operations. To demonstrate industrial viability, syringe filtration and continuous flow fixed-bed column operations were validated. The CBCM fixed-bed column demonstrated stable dye removal efficiency with 10-100 mg mL-1 dye at 10-50 mL min-1 flow rates. Utilizing the magnetic and catalytic activities of the copper ferrite nanoparticles, CBCM was recycled using a magnet, regenerated, and reused for several cycles. CB[6] remarkably improved the performance of the nanocomposite and made it suitable for different effluent treatment techniques. This may pave a sustainable way toward the efficient onsite treatment of effluent at the industrial scale.
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Affiliation(s)
- Chandra Kanth P
- Department of Science, School
of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, India
| | - Maitrayee U. Trivedi
- Department of Science, School
of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, India
| | - Khushali Patel
- Department of Science, School
of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, India
| | - Nirendra M. Misra
- Department of Science, School
of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, India
| | - Manoj Kumar Pandey
- Department of Science, School
of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, India
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7
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Selective Recognition of Amino Acids and Peptides by Small Supramolecular Receptors. Molecules 2020; 26:molecules26010106. [PMID: 33379401 PMCID: PMC7796322 DOI: 10.3390/molecules26010106] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/14/2020] [Accepted: 12/22/2020] [Indexed: 12/30/2022] Open
Abstract
To this day, the recognition and high affinity binding of biomolecules in water by synthetic receptors remains challenging, while the necessity for systems for their sensing, transport and modulation persists. This problematic is prevalent for the recognition of peptides, which not only have key roles in many biochemical pathways, as well as having pharmacological and biotechnological applications, but also frequently serve as models for the study of proteins. Taking inspiration in nature and on the interactions that occur between several receptors and peptide sequences, many researchers have developed and applied a variety of different synthetic receptors, as is the case of macrocyclic compounds, molecular imprinted polymers, organometallic cages, among others, to bind amino acids, small peptides and proteins. In this critical review, we present and discuss selected examples of synthetic receptors for amino acids and peptides, with a greater focus on supramolecular receptors, which show great promise for the selective recognition of these biomolecules in physiological conditions. We decided to focus preferentially on small synthetic receptors (leaving out of this review high molecular weight polymeric systems) for which more detailed and accurate molecular level information regarding the main structural and thermodynamic features of the receptor biomolecule assemblies is available.
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8
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Cheng S, Shen H, Zhao S, Zhang Y, Xu H, Wang L, Di B, Xu L, Hu C. Orally administered mesoporous silica capped with the cucurbit[8]uril complex to combat colitis and improve intestinal homeostasis by targeting the gut microbiota. NANOSCALE 2020; 12:15348-15363. [PMID: 32648873 DOI: 10.1039/d0nr03037f] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
RATIONALE Inflammatory bowel diseases (IBDs) are still awaiting innovative treatments that can maximize the efficiency of site-specific drug release in the colon while enhancing intestinal homeostasis. METHODS Herein, we present multilayer-coated mesoporous silica (MSs) which release payload drugs specifically in the colon tract in the presence of azoreductase produced by the gut microbiota, and simultaneously rejuvenate the tryptophan metabolism of the microbiome to induce activation of the aryl hydrocarbon receptor (AHR) for increased anti-inflammatory effects. The MSs were prepared by using cucurbit[8]uril (CB[8]) as a supramolecular "handcuff" to assemble chitosan/hyaluronic acid multilayers on the periphery of a mesoporous silica core. RESULTS Strikingly, although MSs remained fairly stable in both acidic and neutral pH, they exhibited excellent responsiveness towards dithionite, an azo-reducing agent employed as a substitute to mimic the specific azoreductase environment in vitro. In comparison with the drug in its free form, hydrocortisone-loaded MSs showed optimized accumulation of therapeutics in the colonic mucosa with minimized premature release in the upper gastrointestinal tract in in vivo imaging and biodistribution studies. The enhanced therapeutic effects of MSs were confirmed in dextran sodium sulfate-induced colitis in mice with promoted colonic epithelial barrier integrity, elevated level of AHR agonists and modulated production of inflammatory cytokines. Furthermore, 16S rRNA analysis showed that the disrupted gut homeostasis of colitic mice was partly corrected by MSs. CONCLUSION This novel drug delivery system using self-assembly of tryptophan-functionalized chitosan, which was precomplexed with CB[8], and azobenzene-functionalized hyaluronic acid on the surface of mesoporous silica nanoparticles provides a synergistic gut microbiota-targeting approach for IBD therapy.
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Affiliation(s)
- Shujie Cheng
- Department of Food Quality and Safety, School of Engineering, China Pharmaceutical University, Nanjing 210009, PR China and National R&D Center for Chinese Herbal Medicine Processing, China Pharmaceutical University, Nanjing 210009, PR China
| | - Haowen Shen
- Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Ministry of Education, Nanjing 210009, PR China. and Jiangsu Institute of Medical Device Testing, Nanjing 210019, PR China
| | - Sibo Zhao
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing 211198, PR China.
| | - Yuanxin Zhang
- Department of Food Quality and Safety, School of Engineering, China Pharmaceutical University, Nanjing 210009, PR China and National R&D Center for Chinese Herbal Medicine Processing, China Pharmaceutical University, Nanjing 210009, PR China
| | - Hui Xu
- Department of Food Quality and Safety, School of Engineering, China Pharmaceutical University, Nanjing 210009, PR China and National R&D Center for Chinese Herbal Medicine Processing, China Pharmaceutical University, Nanjing 210009, PR China
| | - Lancheng Wang
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing 211198, PR China.
| | - Bin Di
- Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Ministry of Education, Nanjing 210009, PR China.
| | - Lili Xu
- Key Laboratory of Drug Quality Control and Pharmacovigilance, China Pharmaceutical University, Ministry of Education, Nanjing 210009, PR China.
| | - Chi Hu
- Department of Pharmaceutical Engineering, School of Engineering, China Pharmaceutical University, Nanjing 211198, PR China.
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9
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Zheng Y, Kaifer AE. Kinetics and Thermodynamics of Binding between Zwitterionic Viologen Guests and the Cucurbit[7]uril Host. J Org Chem 2020; 85:10240-10244. [DOI: 10.1021/acs.joc.0c01201] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yeting Zheng
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124, United States
| | - Angel E. Kaifer
- Department of Chemistry, University of Miami, Coral Gables, Florida 33124, United States
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10
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Wu G, Szabó I, Rosta E, Scherman OA. Cucurbit[8]uril-mediated pseudo[2,3]rotaxanes. Chem Commun (Camb) 2019; 55:13227-13230. [PMID: 31631210 DOI: 10.1039/c9cc07144j] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Pseudo[2,3]rotaxanes have been successfully fabricated by the complexation of cucurbit[8]uril (CB[8]) macrocycles with extended viologen derivatives. Two design rules enable the incorporation of a third CB[8] onto a recently reported pseudo[2,2]rotaxane. Incorporation of a third macrocycle confines the dimeric stacking of chromophores into specific alignment, leading to effective electron-delocalisation along their long molecular axis.
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Affiliation(s)
- Guanglu Wu
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
| | - István Szabó
- Department of Chemistry, King's College London, 7 Trinity Street, London, SE1 1DB, UK
| | - Edina Rosta
- Department of Chemistry, King's College London, 7 Trinity Street, London, SE1 1DB, UK
| | - Oren A Scherman
- Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.
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11
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Liu H, Noh GS, Luan Y, Qiao Z, Koo B, Jang YO, Shin Y. A Sample Preparation Technique Using Biocompatible Composites for Biomedical Applications. Molecules 2019; 24:E1321. [PMID: 30987247 PMCID: PMC6479572 DOI: 10.3390/molecules24071321] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 04/02/2019] [Accepted: 04/03/2019] [Indexed: 12/12/2022] Open
Abstract
Infectious diseases, especially pathogenic infections, are a growing threat to public health worldwide. Since pathogenic bacteria usually exist in complex matrices at very low concentrations, the development of technology for rapid, convenient, and biocompatible sample enrichment is essential for sensitive diagnostics. In this study, a cucurbit[6]uril (CB) supermolecular decorated amine-functionalized diatom (DA) composite was fabricated to support efficient sample enrichment and in situ nucleic acid preparation from enriched pathogens and cells. CB was introduced to enhance the rate and effectiveness of pathogen absorption using the CB-DA composite. This novel CB-DA composite achieved a capture efficiency of approximately 90% at an Escherichia coli concentration of 10⁶ CFU/mL within 3 min. Real-time PCR analyses of DNA samples recovered using the CB-DA enrichment system showed a four-fold increase in the early amplification signal strength, and this effective method for capturing nucleic acid might be useful for preparing samples for diagnostic systems.
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Affiliation(s)
- Huifang Liu
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Geun Su Noh
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Yange Luan
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Zhen Qiao
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Bonhan Koo
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Yoon Ok Jang
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
| | - Yong Shin
- Department of Convergence Medicine, Asan Medical Institute of Convergence Science and Technology (AMIST), University of Ulsan College of Medicine, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
- Biomedical Engineering Research Center, Asan Institute of Life Sciences, Asan Medical Center, 88 Olympicro-43gil, Songpa-gu, Seoul 05505, Korea.
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Miskolczy Z, Megyesi M, Toke O, Biczók L. Change of the kinetics of inclusion in cucurbit[7]uril upon hydrogenation and methylation of palmatine. Phys Chem Chem Phys 2019; 21:4912-4919. [DOI: 10.1039/c8cp07231k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The negative activation entropy of tetrahydropalmatine inclusion makes the entry into cucurbit[7]uril significantly slower than in the case of dehydrocorydaline.
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Affiliation(s)
- Zsombor Miskolczy
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - Mónika Megyesi
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - Orsolya Toke
- Laboratory for NMR Spectroscopy
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
| | - László Biczók
- Institute of Materials and Environmental Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1519 Budapest
- Hungary
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Olea Ulloa C, Ponce-Vargas M, Muñoz-Castro A. Nature of cucurbituril-halogen encapsulation. Structural and interaction energy consideration in the X 2@CB[n] (X = Cl, Br, I, n = 6, 7, 8) from relativistic DFT calculations. Phys Chem Chem Phys 2018; 20:29325-29332. [PMID: 30444253 DOI: 10.1039/c8cp04936j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of host-guest species is a relevant issue in the obtaining of supramolecular arrays. In this work, the encapsulation of dihalogen molecules into different cucurbituril hosts allows further evaluation of the role of size and interaction energy for the stabilization of host-guest species. Our results for the X2@CB[n] (X = Cl, Br, I, n = 6, 7, 8) series, allow exploration of the hosts providing increasing cavity sizes, resulting in different host-guest scenarios. It is found that the interaction is mostly given by London type interactions (59% to 65%), followed by the electrostatic character of the interaction (31-27%). For species with a packing coefficient (PC) within the suggested favorable range (PC = 55-68%), and lower, the strength of the stabilizing electrostatic interaction and covalent character, and the repulsive Pauli term, remain similar. Moreover, the dispersion term varies to a large extent, owing to its relation to the available interacting internal face of CB[n], which is less in n = 7 and 8 counterparts. Hence, greater host flexibility is able to maximize the host-guest interactions, where this feature can be viewed as an interesting characteristic towards molecular recognition capabilities, which can be further studied in other related species such as cyclodextrins, pillararenes and other supramolecular hosts.
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Affiliation(s)
- Carolina Olea Ulloa
- Laboratorio de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaceaux 2801, San Miguel, Santiago, Chile.
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Zou H, Liu J, Li Y, Li X, Wang X. Cucurbit[8]uril-Based Polymers and Polymer Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1802234. [PMID: 30168673 DOI: 10.1002/smll.201802234] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/23/2018] [Indexed: 06/08/2023]
Abstract
Cucurbit[8]uril (CB[8]) is unique and notable in the cucurbit[n]uril family, since it has a relatively large cavity and thus is able to simultaneously accommodate two guest molecules. Typically, an electron-deficient first guest and an electron-rich second guest can be bound by CB[8] to form a stable 1:1:1 heteroternary supramolecular complex. Additionally, two homo guests can also be strongly dimerized inside the cavity of CB[8] to form a 2:1 homoternary supramolecular complex. During the past decade, by combining polymer science and CB[8] host-guest chemistry, a variety of systems have been established to construct supramolecular polymers with polymer chains typically at the nanoscale/sub-microscale, and CB[8]-based micro/nanostructured polymer materials in the form of polymer networks and hydrogels, microcapsules, micelles, vesicles, and colloidal particles, normally in solution and occasionally on surfaces. This Review summarizes the noncovalent interactions and strategies used for the preparation of CB[8]-based polymers and polymer materials with a focus on the representative and latest developments, followed by a brief discussion of their characterization, properties, and applications.
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Affiliation(s)
- Hua Zou
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China
| | - Jing Liu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China
| | - Ying Li
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China
| | - Xiaoyan Li
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China
| | - Xia Wang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China
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