101
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Ai Q, Fu Q, Liang F. pH-Mediated Single Molecule Conductance of Cucurbit[7]uril. Front Chem 2020; 8:736. [PMID: 33195012 PMCID: PMC7477741 DOI: 10.3389/fchem.2020.00736] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 07/16/2020] [Indexed: 11/13/2022] Open
Abstract
Recognition tunneling technique owns the capability for investigating and characterizing molecules at single molecule level. Here, we investigated the conductance value of cucurbit[7]uril (CB[7]) and melphalan@CB[7] (Mel@CB[7]) complex molecular junctions by using recognition tunneling technique. The conductances of CB[7] and Mel@CB[7] with different pH values were studied in aqueous media as well as organic solvent. Both pH value and guest molecule have an impact on the conductance of CB[7] molecular junction. The conductances of CB[7] and Mel@CB[7] both showed slightly difference on the conductance under different measurement systems. This work extends the molecular conductance measurement to aqueous media and provides new insights of pH-responsive host-guest system for single molecule detection through electrical measurements.
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Affiliation(s)
- Qiushuang Ai
- The State Key Laboratory for Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, China
| | - Qiang Fu
- Jiangxi College of Traditional Chinese Medicine, Fuzhou, China
| | - Feng Liang
- The State Key Laboratory for Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, China
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102
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Tang B, Zhao J, Xu J, Zhang X. Cucurbit[
n
]urils for Supramolecular Catalysis. Chemistry 2020; 26:15446-15460. [DOI: 10.1002/chem.202003897] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/08/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Bohan Tang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Jiantao Zhao
- Key Laboratory of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Jiang‐Fei Xu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
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103
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Liu C, Zhang Z, Fan Z, He C, Tan Y, Xu H. Adaptive Se‐Te Metathesis Controlled by Cucurbituril‐Based Host‐Guest Interaction. Chem Asian J 2020; 15:4321-4326. [DOI: 10.1002/asia.202001224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 10/27/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Cheng Liu
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Zhiheng Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Zhiyuan Fan
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Chaowei He
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Yizheng Tan
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
| | - Huaping Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering Department of Chemistry Tsinghua University Beijing 100084 P. R. China
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104
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Hasanzade Z, Raissi H. Molecular mechanism for the encapsulation of the doxorubicin in the cucurbit[n]urils cavity and the effects of diameter, protonation on loading and releasing of the anticancer drug:Mixed quantum mechanical/ molecular dynamics simulations. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 196:105563. [PMID: 32531653 DOI: 10.1016/j.cmpb.2020.105563] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/06/2020] [Accepted: 05/20/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND AND OBJECTIVES Doxorubicin is a common apoptotic chemotherapeutic which has shown an obvious inhibitory effect in cancer chemotherapy. Here, cucurbit[n]urils (n = 7,10) have been proposed as a doxorubicin carrier, and the effects of diameter, protonation on loading and releasing of the anticancer drug doxorubicin has been studied. METHODS The Density Functional Theory (DFT) calculation and Molecular Dynamics (MD) simulation are performed to study the adsorption process of the (guest) Doxorubicin molecule in the neutral and protonated states within the (host) cucurbit[n]urils (n = 7,10). RESULTS DFT results show that the adsorption process in water is thermodynamically favorable. It is found that the binding energies for protonated drug encapsulation in cucurbit[n]urils are weaker than those of the neutral drug, implying the protonation of doxorubicin can promote the drug release from the adsorption situation. The electron density values and their Laplacian are evaluated to identify the nature of the intermolecular interactions through the topological parameters using the Bader's theory of atoms in molecules. Furthermore, the natural bond orbital analysis shows that the electrons aretransferred from cucurbit[n]urils to drug in all complexes. MD simulation results indicate that value of drug diffusion coefficient is small, therefore, we expect DOX to be slowly released from the CB cavity. CONCLUSIONS Based on obtained results, cucurbit[n]urils may be a prominent nano-carrier to loading and release drug on to target cells.
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Affiliation(s)
| | - Heidar Raissi
- Chemistry Department, University of Birjand, Birjand, Iran.
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105
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Xu W, Li C. Efficient synthesis of cucurbiturils and their derivatives using mechanochemical high-speed ball milling (HSBM). HIGH PERFORM POLYM 2020. [DOI: 10.1177/0954008320967057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Under solid-phase conditions, mechanical ball milling can be used to selectively prepare cucurbit[6]uril (CB[6]) and its derivatives without the use of catalysts and solvents. Using response surface method to determine the optimal conditions for the synthesis of CB[6]. The yield of CB[6] and its derivatives is 75–95%, with a high selectivity of more than 95%. In the synthesis of CB[6] using this method, the amount of acid required is significantly less, no organic solvent is needed, and the preparation of the fully aryl-substituted CB[6] is possible, which is otherwise difficult to be synthesized directly using traditional methods. Mechanical ball milling, thus, is of great significance in the synthesis and research of new cucurbituril supramolecules. Process scale-up experiments show that the yield and selectivity of the various types of cucurbiturils is higher than 95%, because of which they find good industrial applications.
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Affiliation(s)
- Wenhao Xu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
| | - Chengyu Li
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, China
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106
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Chemoresponsive polymer systems for selective molecular recognition of organic molecules in biological systems. Acta Biomater 2020; 116:32-66. [PMID: 32877717 DOI: 10.1016/j.actbio.2020.08.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/29/2020] [Accepted: 08/24/2020] [Indexed: 12/20/2022]
Abstract
Smart polymer materials that respond to a chemical stimulus are applied for the construction of biomedical devices and purification/separation systems. Small organic molecules are a particular type of stimulus. Their abnormal concentration indisputably indicates certain diseases. They are also hazardous environment contaminants. Polymer materials, which structure is selectively changed in the presence of a defined organic compound are promising in view of regulation of certain biomedical functions, as well as in view of chemical detectors construction. This review summarizes the state of the art in the self-assemblies of amphiphilic copolymers and polymer networks sensitive toward organic species, with an emphasis on the reports from the last decade. We focus on the relationship between the selectivity of introduced receptor moieties responsible for the change of material structure, the overall structure of material and its functionality.
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107
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Jayapaul J, Schröder L. Molecular Sensing with Host Systems for Hyperpolarized 129Xe. Molecules 2020; 25:E4627. [PMID: 33050669 PMCID: PMC7587211 DOI: 10.3390/molecules25204627] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/27/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022] Open
Abstract
Hyperpolarized noble gases have been used early on in applications for sensitivity enhanced NMR. 129Xe has been explored for various applications because it can be used beyond the gas-driven examination of void spaces. Its solubility in aqueous solutions and its affinity for hydrophobic binding pockets allows "functionalization" through combination with host structures that bind one or multiple gas atoms. Moreover, the transient nature of gas binding in such hosts allows the combination with another signal enhancement technique, namely chemical exchange saturation transfer (CEST). Different systems have been investigated for implementing various types of so-called Xe biosensors where the gas binds to a targeted host to address molecular markers or to sense biophysical parameters. This review summarizes developments in biosensor design and synthesis for achieving molecular sensing with NMR at unprecedented sensitivity. Aspects regarding Xe exchange kinetics and chemical engineering of various classes of hosts for an efficient build-up of the CEST effect will also be discussed as well as the cavity design of host molecules to identify a pool of bound Xe. The concept is presented in the broader context of reporter design with insights from other modalities that are helpful for advancing the field of Xe biosensors.
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Affiliation(s)
| | - Leif Schröder
- Molecular Imaging, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany;
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108
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Saini M, Ghosh S, Kumar V, Roy P, Sadhu KK. Selective Release of Doxorubicin from Cucurbit[8]uril Stabilized Gold Supra-Pyramid Host at pH of Small Intestine. Chemistry 2020; 26:15150-15158. [PMID: 32463129 DOI: 10.1002/chem.202002048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Indexed: 12/14/2022]
Abstract
Gold supra-pyramid structures were obtained by the addition of acidic solution of cucurbit[8]uril (CB[8]) to an aqueous solution of citrate stabilized gold nanoparticles (AuNP). The reaction resulted in the precipitation of supra-pyramid from the solution after just 1 min of shaking. Microscopic images confirmed formation of the supra-pyramid. The stepwise structural transformation towards the supra-pyramid was examined with variable concentrations of CB[8] to AuNP solution. Anionic counter parts of these acids (Br- , NO3 - , SO4 2- and Cl- ) controlled the size of the synthesized supra-pyramids. These supra-pyramid hosts showed uptake of three anticancer drugs: oral drugs etoposide, prednisolone and intravenous drug doxorubicin. Releases of drugs from these hosts were emulated at acidic stomach pH, basic small intestinal pH and in the presence of human serum albumin (HSA). The specific release of doxorubicin was confirmed at small intestinal pH 7.4. Poor release of drugs in presence of CB[8] specific guest 1-adamantanamine confirmed the role of the supra-pyramid as the exclusive host. The release of doxorubicin from the supra-pyramid at pH 7.4 was confirmed by fluorescence microscopic imaging with prostate cancer DU-145 cell line.
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Affiliation(s)
- Meenaxi Saini
- Department of Chemistry, Indian Institution of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Souvik Ghosh
- Department of Biotechnology, Indian Institution of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Viney Kumar
- Department of Biotechnology, Indian Institution of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Partha Roy
- Department of Biotechnology, Indian Institution of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Kalyan K Sadhu
- Department of Chemistry, Indian Institution of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
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109
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Qiu D, Li M, Kang C, Wei J, Wang F, Yang R. Cucurbit[6]uril-Derived Sub-4 nm Pores-Dominated Hierarchical Porous Carbon for Supercapacitors: Operating Voltage Expansion and Pore Size Matching. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002718. [PMID: 32830405 DOI: 10.1002/smll.202002718] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/24/2020] [Indexed: 06/11/2023]
Abstract
The intrinsic properties of carbon-based material and the voltage window of electrolyte are the two key barriers to restrict the energy density of carbon-based supercapacitors (SCs). Herein, a cucurbit[6]uril-derived nitrogen-doped hierarchical porous carbon (CBCx) with unique pore structure characteristics is synthesized and successfully applied to construct SCs based on different electrolyte systems. Owing to narrow pore size distribution (0.5-4 nm), colossal ion-accessible pore volume, prominent supermesopore volume, and reasonable heteroatom configuration, the CBCx-based SCs demonstrate excellent electrochemical performances with high operating voltages in two distinct systems. The optimal SCs can output a maximum energy/power density of 18 Wh kg-1 (11.1 Wh L-1 )/20 kW kg-1 (12.3 kW L-1 ) with an operating voltage of 1.2 V in potassium hydroxide aqueous electrolyte, as well as an ultralong cycle life of up to 50 000 cycles (0.046% decay per 100 cycles). Furthermore, the optimal SCs deliver an exceptionally high energy/power density of 95 Wh kg-1 (58.4 Wh L-1 )/70 kW kg-1 (43 kW L-1 ) with an ultrahigh operating voltage of 3.5 V in 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte. This work opens up a new application field for cucurbit[6]uril and provides an alternative avenue for optimizing the performances of carbon-based materials for SCs.
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Affiliation(s)
- Daping Qiu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Min Li
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Cuihua Kang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jinying Wei
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Feng Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Ru Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing, 100029, China
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110
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Lee JS, Song IH, Shinde PB, Nimse SB. Macrocycles and Supramolecules as Antioxidants: Excellent Scaffolds for Development of Potential Therapeutic Agents. Antioxidants (Basel) 2020; 9:E859. [PMID: 32937775 PMCID: PMC7555118 DOI: 10.3390/antiox9090859] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/04/2020] [Accepted: 09/06/2020] [Indexed: 01/05/2023] Open
Abstract
Oxidative stress due to the high levels of reactive oxygen species (ROS) that damage biomolecules (lipids, proteins, DNA) results in acute inflammation. However, without proper intervention, acute inflammation progresses to chronic inflammation and then to several chronic diseases, including cancer, myocardial infarction, cardiovascular diseases, chronic inflammation, atherosclerosis, and more. There has been extensive research on the antioxidants of natural origin. However, there are myriad possibilities for the development of synthetic antioxidants for pharmacological applications. There is an increasing interest in the identification of novel synthetic antioxidants for the modulation of biochemical processes related to ROS. In this regard, derivatives of supramolecules, such as calix[n]arene, resorcinarene, calixtyrosol, calixpyrrole, cucurbit[n]uril, porphyrin etc. are gaining attention for their abilities to scavenge the free radicals. Supramolecular chemistry offers excellent scaffolds for the development of novel antioxidants that can be used to modulate free radical reactions and to improve the disorders related to oxidative stress. This review focuses on the interdisciplinary approach for the design and development of novel synthetic antioxidants based on supramolecular scaffolds, with potentially protective effects against oxidative stress.
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Affiliation(s)
- Jung-Seop Lee
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, Korea; (J.-S.L.); (I.-h.S.)
| | - In-ho Song
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, Korea; (J.-S.L.); (I.-h.S.)
| | - Pramod B. Shinde
- Natural Products & Green Chemistry Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Academy of Scientific and Innovative Research (AcSIR), Council of Scientific and Industrial Research (CSIR), Bhavnagar 364002, Gujarat, India;
| | - Satish Balasaheb Nimse
- Institute of Applied Chemistry and Department of Chemistry, Hallym University, Chuncheon 200702, Korea; (J.-S.L.); (I.-h.S.)
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111
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Hennig A, Nau WM. Interaction of Cucurbit[7]uril With Protease Substrates: Application to Nanosecond Time-Resolved Fluorescence Assays. Front Chem 2020; 8:806. [PMID: 33134264 PMCID: PMC7511663 DOI: 10.3389/fchem.2020.00806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 07/31/2020] [Indexed: 01/04/2023] Open
Abstract
We report the use of the macrocyclic host cucurbit[7]uril (CB7) as a supramolecular additive in nanosecond time-resolved fluorescence (Nano-TRF) assays for proteases to enhance the discrimination of substrates and products and, thereby, the sensitivity. A peptide substrate was labeled with 2,3-diazabicyclo[2.2.2]oct-2-ene (DBO) as a long-lived (>300 ns) fluorescent probe and 3-nitrotyrosine was established as a non-fluorescent fluorescence resonance energy transfer (FRET) acceptor that acts as a “dark quencher.” The substrate was cleaved by the model proteases trypsin and chymotrypsin and the effects of the addition of CB7 to the enzyme assay mixture were investigated in detail using UV/VIS absorption as well as steady-state and time-resolved fluorescence spectroscopy. This also allowed us to identify the DBO and nitrotyrosine residues as preferential binding sites for CB7 and suggested a hairpin conformation of the peptide, in which the guanidinium side chain of an arginine residue is additionally bound to a vacant ureido rim of one of the CB7 hosts.
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Affiliation(s)
- Andreas Hennig
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH, Bremen, Germany.,Institute of Chemistry of New Materials, School of Biology/Chemistry, Universität Osnabrück, Osnabrück, Germany.,Center of Cellular Nanoanalytics (CellNanOs), Universität Osnabrück, Osnabrück, Germany
| | - Werner M Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen gGmbH, Bremen, Germany
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112
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Yang X, Wang R, Kermagoret A, Bardelang D. Oligomeric Cucurbituril Complexes: from Peculiar Assemblies to Emerging Applications. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xue Yang
- 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, Taipa Macau China
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113
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Yang X, Wang R, Kermagoret A, Bardelang D. Oligomeric Cucurbituril Complexes: from Peculiar Assemblies to Emerging Applications. Angew Chem Int Ed Engl 2020; 59:21280-21292. [PMID: 32567745 DOI: 10.1002/anie.202004622] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Indexed: 12/16/2022]
Abstract
Proteins are an endless source of inspiration. By carefully tuning the amino-acid sequence of proteins, nature made them evolve from primary to quaternary structures, a property specific to protein oligomers and often crucial to accomplish their function. On the other hand, the synthetic macrocycles cucurbiturils (CBs) have shown outstanding recognition properties in water, and a growing number of (host)n :(guest)n supramolecular polymers involving CBs have been reported. However, the burgeoning field of discrete (n:n) host:guest oligomers has just started to attract attention. While 2:2 complexes are the major oligomers, 3:3 and up to 6:6 oligomers have been described, some associated with emerging applications, specific to the (n:n) arrangements. Design rules to target (n:n) host:guest oligomers are proposed toward new advanced host:guest systems.
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Affiliation(s)
- Xue Yang
- 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, Taipa, Macau, China
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114
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Mutihac RC, Bunaciu AA, Buschmann HJ, Mutihac L. A brief overview on supramolecular analytical chemistry of cucurbit[n]urils and hemicucurbit[n]urils. J INCL PHENOM MACRO 2020. [DOI: 10.1007/s10847-020-01019-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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115
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Kircheva N, Dobrev S, Dasheva L, Koleva I, Nikolova V, Angelova S, Dudev T. Complexation of biologically essential (mono- and divalent) metal cations to cucurbiturils: a DFT/SMD evaluation of the key factors governing the host-guest recognition. RSC Adv 2020; 10:28139-28147. [PMID: 35519129 PMCID: PMC9055741 DOI: 10.1039/d0ra04387g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 07/20/2020] [Indexed: 01/31/2023] Open
Abstract
Supramolecular complexes based on classical synthetic macrocyclic host molecules such as cyclodextrins and calixarenes have received much attention recently due to their broad applications as biological and chemical sensors, bioimaging agents, drug delivery carriers, light-emitting materials, etc. Cucurbit[n]urils comprise another group of cavitands known for their high affinity for various guest molecules. Nonetheless, some aspects of their coordination chemistry remain enigmatic. Although they are recognized as potential biomimetic scaffolds, they are still not tested as metalloenzyme models and not much is known about their metal-binding properties. Furthermore, there is no systematic study on the key factors controlling the processes of metal coordination to these systems. In the computational study herein, DFT molecular modeling has been employed in order to investigate the interactions of biologically essential (mono- and divalent) metal cations to cucurbit[n]urils and evaluate the major determinants shaping the process. The thermodynamic descriptors (Gibbs energies in the gas phase and in a water medium) of the corresponding complexation reactions have been estimated. The results obtained shed light on the mechanism of host-guest recognition and disclose which factors more specifically affect the metal binding process.
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Affiliation(s)
- Nikoleta Kircheva
- Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences 1113 Sofia Bulgaria
| | - Stefan Dobrev
- Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences 1113 Sofia Bulgaria
| | - Lyubima Dasheva
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl. Ohridski" 1164 Sofia Bulgaria
| | - Iskra Koleva
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl. Ohridski" 1164 Sofia Bulgaria
| | - Valya Nikolova
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl. Ohridski" 1164 Sofia Bulgaria
| | - Silvia Angelova
- Institute of Optical Materials and Technologies "Acad. J. Malinowski", Bulgarian Academy of Sciences 1113 Sofia Bulgaria
| | - Todor Dudev
- Faculty of Chemistry and Pharmacy, Sofia University "St. Kl. Ohridski" 1164 Sofia Bulgaria
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116
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Pashkina E, Aktanova A, Blinova E, Mirzaeva I, Kovalenko E, Knauer N, Ermakov A, Kozlov V. Evaluation of the Immunosafety of Cucurbit[n]uril on Peripheral Blood Mononuclear Cells In Vitro. Molecules 2020; 25:E3388. [PMID: 32726898 PMCID: PMC7435832 DOI: 10.3390/molecules25153388] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 07/09/2020] [Accepted: 07/23/2020] [Indexed: 12/19/2022] Open
Abstract
Cucurbiturils (CB[n]s) are nanoscale macrocyclic compounds capable of encapsulating a molecule or part of a molecule by forming host-guest complexes. Integration of drugs with CB[n] is used for the following purposes: controlling clearance; protection of the drug from biodegradation; targeted delivery to specific organs, tissues, or cells; reduction of toxicity; and improving solubility. One of the major problems encountered in the application of new drug delivery systems is lack of knowledge of their biological properties. CB[n], unlike many other often toxic nanoparticles, has extremely low toxicity, even at high doses. However, many aspects of the biological actions of these nanoscale cavitands remain unclear, including the immunotropic properties. In this study, we investigated the immunotoxicity and immunomodulation properties of CB[n]. It was found that CB[7] and CB[6] did not decrease the viability of mononuclear cells at all tested concentrations from 0.1-1 mM. Overall, the results indicated an immunomodulatory effect of different concentrations of CB[n]. In the case of a longer cultivation time, CB[n] had an immunostimulating effect, which was indicated by an enhancement of the proliferative activity of cells and increased expression of HLA-DR on lymphocytes.
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Affiliation(s)
- Ekaterina Pashkina
- Research Institute of Fundamental and Clinical Immunology, 14, Yadrintsevskaya st., 630099 Novosibirsk, Russia; (A.A.); (E.B.); (N.K.); (V.K.)
- Novosibirsk State Medical University, 52, Krasny Prospect, 630091 Novosibirsk, Russia;
- Institute of Chemical Biology and Fundamental Medicine SB RAS, 8, Lavrentiev ave., 630090 Novosibirsk, Russia
| | - Alina Aktanova
- Research Institute of Fundamental and Clinical Immunology, 14, Yadrintsevskaya st., 630099 Novosibirsk, Russia; (A.A.); (E.B.); (N.K.); (V.K.)
- Institute of Chemical Biology and Fundamental Medicine SB RAS, 8, Lavrentiev ave., 630090 Novosibirsk, Russia
| | - Elena Blinova
- Research Institute of Fundamental and Clinical Immunology, 14, Yadrintsevskaya st., 630099 Novosibirsk, Russia; (A.A.); (E.B.); (N.K.); (V.K.)
| | - Irina Mirzaeva
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Lavrentiev ave., 630090 Novosibirsk, Russia; (I.M.); (E.K.)
| | - Ekaterina Kovalenko
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3, Lavrentiev ave., 630090 Novosibirsk, Russia; (I.M.); (E.K.)
| | - Nadezhda Knauer
- Research Institute of Fundamental and Clinical Immunology, 14, Yadrintsevskaya st., 630099 Novosibirsk, Russia; (A.A.); (E.B.); (N.K.); (V.K.)
- Institute of Chemical Biology and Fundamental Medicine SB RAS, 8, Lavrentiev ave., 630090 Novosibirsk, Russia
| | - Aleksandr Ermakov
- Novosibirsk State Medical University, 52, Krasny Prospect, 630091 Novosibirsk, Russia;
| | - Vladimir Kozlov
- Research Institute of Fundamental and Clinical Immunology, 14, Yadrintsevskaya st., 630099 Novosibirsk, Russia; (A.A.); (E.B.); (N.K.); (V.K.)
- Novosibirsk State Medical University, 52, Krasny Prospect, 630091 Novosibirsk, Russia;
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117
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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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118
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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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119
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Li L, Liu M, Yue L, Wang R, Zhang N, Liang Y, Zhang L, Cheng L, Xia J, Wang R. Host-Guest Protein Assembly for Affinity Purification of Methyllysine Proteomes. Anal Chem 2020; 92:9322-9329. [PMID: 32510198 DOI: 10.1021/acs.analchem.0c01643] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Protein-protein interactions drive self-assembly of biomacromolecules and thus enable important physiological functions at a cellular level. Supramolecular chemists have developed artificial host-guest interactions that are similar with, yet distinct from and orthogonal to, the natural protein-protein interactions. For instance, cucurbit[n]urils are synthetic receptors that can specifically recognize proteins with N-terminal aromatic residues with high affinities, yet this interaction can be reversed by the competition of small molecules such as amantadine. Herein, we develop a site-specific, oriented protein-display method by combining the host-guest interaction based on cucurbit[7]uril and a covalent protein-peptide reaction. A methyllysine-binding protein HP1β chromodomain (CD) is immobilized via host-guest interactions and used as the "bait" to capture methyllysine proteomes from cancer cells. The captured "fish"-methyllysine-containing proteins-can be released via competitive displacement by amantadine in a nondenaturing and traceless manner. This affinity purification method found 73 novel methyllysine sites from 101 identified sites among 66 methylated proteins from 255 HP1β CD-binding proteins in cancer cells via subsequent mass spectrometric analysis. This work thereby presents a new strategy of artificial host-guest protein assembly in affinity purification of methyllysine proteins in coupling to mass spectrometry.
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Affiliation(s)
- Linting Li
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China
| | - Min Liu
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China
| | - Ludan Yue
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, P. R. China
| | - Rui Wang
- Pingshan Translational Medicine Center, Shenzhen Bay Laboratory, Shenzhen 518000, P. R. China
| | - Ning Zhang
- Department of Critical Care Medicine, Shenzhen People's Hospital, The Second Clinical Medicine College of Jinan University, Shenzhen 518000, P. R. China
| | - Yujie Liang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China
| | - Liang Zhang
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong, P. R. China
| | - Lixin Cheng
- Department of Critical Care Medicine, Shenzhen People's Hospital, The Second Clinical Medicine College of Jinan University, Shenzhen 518000, P. R. China
| | - Jiang Xia
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, P. R. China
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120
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Tang X, Yang Y, Kang Y, Wu H, Xu JF, Wang Z. Efficient Fenton Degradation of Perylene Diimide Dye Promoted by a Catalytic Amount of Cucurbit[8]uril. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:5954-5959. [PMID: 32397717 DOI: 10.1021/acs.langmuir.0c00806] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Herein, we propose a new method for promoting the degradation of a perylene diimide (PDI) dye, through a Fenton reaction with cucurbit[8]uril (CB[8]) as a supramolecular catalyst. The CB[8] can encapsulate the hydrophobic moiety of the PDI dye and inhibit its aggregation in aqueous solutions, thus increasing the collision frequency between the PDI and oxidants to accelerate the reaction. As a result, the encapsulated PDI molecule is preferentially degraded, followed by freeing the cavity of CB[8] and enabling it to encapsulate another PDI molecule to realize a catalytic cycle. Hence, a catalytic amount of CB[8] is sufficient to accelerate the the Fenton degradation. It is anticipated that this work will extend the realm of supramolecular catalysis systems and enrich the field of degradation of polycyclic aromatic dyes.
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Affiliation(s)
- Xiaoyan Tang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yuchong Yang
- 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
| | - Han Wu
- 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
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121
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Xie Z, Yang M, Luo L, Lv Y, Song K, Liu S, Chen D, Wang J. Nanochannel sensor for sensitive and selective adamantanamine detection based on host-guest competition. Talanta 2020; 219:121213. [PMID: 32887115 DOI: 10.1016/j.talanta.2020.121213] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 05/16/2020] [Accepted: 05/21/2020] [Indexed: 01/01/2023]
Abstract
The abuse of adamantanamine (ADA) and its derivatives as veterinary drugs in the poultry industry could cause severe health problems for humans. It is of great need to develop a rapid, cheap and ultrasensitive method for ADA detection. In this study, a sensitive conical nanochannel sensor was established for the rapid quantitative detection of ADA with the distinctive design of the host-guest competition. The sensor was constructed by functionalizing the nanochannel surface with p-toluidine and was then assembled with Cucurbit [7]uril (CB [7]). When ADA is added, it could occupy the cavity of CB [7] due to the host-guest competition and makes CB [7] to release from the CB [7]-p-toluidine complex, resulting in a distinct change of hydrophobicity of the nanochannel, which could be determined by the ionic current. Under the optimal conditions, the strategy permitted sensitive detection of ADA in a linear range of 10-1000 nM. The nanochannel based ADA sensing platform showed both high sensitivity and excellent reproducibility and the limit of detection was 4.54 nM. For the first time, the rapid and sensitive recognition of an illegal medicine was realized based on the host-guest competition method with the nanochannel system and the principle and feasibility of this method were described at length. This strategy provides a simple, reliable, and effective way to apply host-guest system in the development of nanochannel sensor for small-molecule drug detection.
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Affiliation(s)
- Zhipeng Xie
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China; The State Key Laboratory of Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Mingfeng Yang
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Le Luo
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Yiping Lv
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Kangjin Song
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Simin Liu
- The State Key Laboratory of Refractories and Metallurgy, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan, 430081, China
| | - Daqi Chen
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China.
| | - Jiahai Wang
- School of Chemistry and Chemical Engineering, School of Mechanical and Electrical Engineering, Guangzhou University, Guangzhou, 510006, China.
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123
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Sinawang G, Osaki M, Takashima Y, Yamaguchi H, Harada A. Biofunctional hydrogels based on host–guest interactions. Polym J 2020. [DOI: 10.1038/s41428-020-0352-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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124
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Liang J, Nuhnen A, Millan S, Breitzke H, Gvilava V, Buntkowsky G, Janiak C. Encapsulation of a Porous Organic Cage into the Pores of a Metal-Organic Framework for Enhanced CO 2 Separation. Angew Chem Int Ed Engl 2020; 59:6068-6073. [PMID: 31912916 PMCID: PMC7187261 DOI: 10.1002/anie.201916002] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Indexed: 12/25/2022]
Abstract
We present a facile approach to encapsulate functional porous organic cages (POCs) into a robust MOF by an incipient-wetness impregnation method. Porous cucurbit[6]uril (CB6) cages with high CO2 affinity were successfully encapsulated into the nanospace of Cr-based MIL-101 while retaining the crystal framework, morphology, and high stability of MIL-101. The encapsulated CB6 amount is controllable. Importantly, as the CB6 molecule with intrinsic micropores is smaller than the inner mesopores of MIL-101, more affinity sites for CO2 are created in the resulting CB6@MIL-101 composites, leading to enhanced CO2 uptake capacity and CO2 /N2 , CO2 /CH4 separation performance at low pressures. This POC@MOF encapsulation strategy provides a facile route to introduce functional POCs into stable MOFs for various potential applications.
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Affiliation(s)
- Jun Liang
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic7098 Liuxian BlvdNanshan DistrictShenzhen518055China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Alexander Nuhnen
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Simon Millan
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Hergen Breitzke
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität DarmstadtAlarich-Weiss-Straße 464287DarmstadtGermany
| | - Vasily Gvilava
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität DarmstadtAlarich-Weiss-Straße 464287DarmstadtGermany
| | - Christoph Janiak
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic7098 Liuxian BlvdNanshan DistrictShenzhen518055China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf40204DüsseldorfGermany
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125
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Sinawang G, Osaki M, Takashima Y, Yamaguchi H, Harada A. Supramolecular self-healing materials from non-covalent cross-linking host-guest interactions. Chem Commun (Camb) 2020; 56:4381-4395. [PMID: 32249859 DOI: 10.1039/d0cc00672f] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The introduction of non-covalent bonds is effective for achieving self-healing properties because they can be controlled reversibly. One approach to introduce these bonds into supramolecular materials is use of host-guest interactions. This feature article summarizes the development of supramolecular materials constructed by non-covalent cross-linking through several approaches, such as host-guest interactions between host polymers and guest polymers, 1 : 2-type host-guest interactions, and host-guest interactions from the polymerization of host-guest inclusion complexes. Host-guest interactions show self-healing functions while also enabling stimuli-responsiveness (redox, pH, and temperature). The self-healing function of supramolecular materials is achieved by stress dispersion arising from host-guest interactions when stress is applied. Reversible bonds based on host-guest interactions have tremendous potential to expand the variety of functional materials.
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Affiliation(s)
- Garry Sinawang
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
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126
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Ahmadian N, Mehrnejad F, Amininasab M. Molecular Insight into the Interaction between Camptothecin and Acyclic Cucurbit[4]urils as Efficient Nanocontainers in Comparison with Cucurbit[7]uril: Molecular Docking and Molecular Dynamics Simulation. J Chem Inf Model 2020; 60:1791-1803. [PMID: 31944098 DOI: 10.1021/acs.jcim.9b01087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Cucurbit[n]urils (CB[n], n = 5, 6, 7, 8, 10, 14) and their derivatives due to the hydrophobic cavities and polar carbonyl portals have been considerably explored for their potential uses as drug delivery systems. It is important to understand how these macrocyclic compounds interact with guests. Camptothecin (CPT), as a natural alkaloid, is a topoisomerase inhibitor with antitumor activity against breast, pancreas, and lung cancers. The application of this drug in cancer therapy is restricted due to its low aqueous solubility and high toxicity. Recently, the complex formation between the cucurbit[7]uril (CB[7])/acyclic cucurbit[4]uril (aCB[4]) nanocontainers and CPT have been evaluated to overcome the potential drawbacks of the related drug. Herein, using computational methods, we identified the interaction mechanism of CPT with CB[7]/aCB[4]s, which consist of benzene and naphthalene sidewalls (aCB[4]benzene and aCB[4]naphthalene, respectively) since the experimental approaches have not completely provided information at the molecular level. Our molecular docking and molecular dynamics (MD) simulations show that CB[7] and its two acyclic derivatives form stable inclusion complexes with CPT especially through hydrophobic interactions. We also found that aCB[4]s with the aromatic sidewalls can attach to CPT through π-π interactions. This investigation highlights aCB[4]s due to the structural properties and flexible nature as better nanocontainers for controlled release delivery of pharmaceutical agents in comparison with the CB[7] nanocontainer.
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Affiliation(s)
- Nasim Ahmadian
- Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, P.O. Box: 14395-1561, Tehran, Iran
| | - Faramarz Mehrnejad
- Department of Life Sciences Engineering, Faculty of New Sciences and Technologies, University of Tehran, P.O. Box: 14395-1561, Tehran, Iran
| | - Mehriar Amininasab
- Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, P.O. Box: 14155-6455, Tehran, Iran
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127
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Highly Selective Separation of Minimum‐Boiling Azeotrope Toluene/Pyridine by Nonporous Adaptive Crystals of Cucurbit[6]uril. Angew Chem Int Ed Engl 2020; 59:5355-5358. [DOI: 10.1002/anie.201916041] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Indexed: 12/14/2022]
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128
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Gao Y, Yang X, Wang Z, Zhong Z, Hu Y, Wang Y. Supramolecular Nano-Encapsulation of Anabasine Reduced Its Developmental Toxicity in Zebrafish. Front Chem 2020; 8:134. [PMID: 32185162 PMCID: PMC7058803 DOI: 10.3389/fchem.2020.00134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 02/13/2020] [Indexed: 11/25/2022] Open
Abstract
Anabasine (ANA), a major piperidine alkaloid originally isolated from wild tobacco trees (Nicotiana glauca), has been known to induce serious developmental toxicities such as skeletal deformities in livestock and humans. In this study, we thoroughly investigated the supramolecular nano-encapsulations of ANA by an artificial nanocontainer, cucurbit[7] uril (CB[7]), and examined the influences of the nano-encapsulation on ANA's inherent developmental toxicities on a zebrafish model. We have shown that CB[7] formed 1:1 host-guest inclusion complexes with ANA via a relatively high binding strength [Ka of (7.45 ± 0.31) × 104 M−1] in an aqueous solution, via UV-vis and 1H nuclear magnetic resonance spectroscopic titrations, as well as isothermal titration calorimetry titration. As a consequence, CB[7] significantly attenuated the developmental toxicity of ANA on zebrafish in vivo. In contrast, for a comparative purpose, β-CD didn't exert any influence on the toxicity of ANA due to its weak binding with ANA, which was not even measurable via either spectroscopic methods or ITC titration. This is the first head-to-head comparison of this pair of nanocontainers, CB[7] and β-CD, on their potential roles in influencing the toxicity of guest molecules and the results suggested that CB[7] could become a more promising functional excipient for reducing the inherent toxicities of active pharmaceutical ingredients, particularly alkaloids that may form relatively strong host-guest binding species with the host.
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Affiliation(s)
- Yan Gao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Xue Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Ziyi Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Zhangfeng Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yuanjia Hu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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129
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Lin RL, Li R, Shi H, Zhang K, Meng D, Sun WQ, Chen K, Liu JX. Symmetrical-Tetramethyl-Cucurbit[6]uril-Driven Movement of Cucurbit[7]uril Gives Rise to Heterowheel [4]Pseudorotaxanes. J Org Chem 2020; 85:3568-3575. [PMID: 32041407 DOI: 10.1021/acs.joc.9b03283] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Two novel heterowheel [4]pseudorotaxanes consisting of cucurbit[7]uril (Q[7]) and symmetrical-tetramethyl-cucurbit[6]uril (TMeQ[6]) were constructed via the multirecognition mechanism, in which Q[7] can rotate freely around the horizontal axis, while TMeQ[6] cannot. In the construction process, due to strong repulsive forces between carbonyl portals of two neighboring wheels, the dethreading and movement of the wheels along the axle was observed. The dissociation of the [4]pseudorotaxanes was also discussed.
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Affiliation(s)
- Rui-Lian Lin
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, China
| | - Ran Li
- 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 and Technology, Nanjing 210044, China
| | - Hao Shi
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, China
| | - Kun Zhang
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, China
| | - Di Meng
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, China
| | - Wen-Qi Sun
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, 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 and Technology, Nanjing 210044, China
| | - Jing-Xin Liu
- College of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243001, China
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130
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Li FZ, Mei L, An SW, Hu KQ, Chai ZF, Liu N, Shi WQ. Kinked-Helix Actinide Polyrotaxanes from Weakly Bound Pseudorotaxane Linkers with Variable Conformations. Inorg Chem 2020; 59:4058-4067. [PMID: 32129613 DOI: 10.1021/acs.inorgchem.0c00037] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The incorporation of a mechanically interlocked molecule such as pseudorotaxane into metal-organic coordination polymers has afforded plenty of new hybrid materials with special structures and unique properties. In this work, we employ a weakly bound cucurbit[6]uril (CB[6])-bipyridinium pseudorotaxane as a supramolecular precursor to assemble with uranyl, aiming to construct uranyl-rotaxane coordination polymers (URCPs) with intriguing structures. By adjusting the synthetic conditions, a new kinked-helix uranyl rotaxane compound (URCP3), together with three other compounds URCP1, URCP2, and URCP4 varying from 1D chains to 2D interwoven networks, was obtained. Detailed structural analyses indicate that the pseudorotaxane ligand (C8BPCA@CB[6]) shows great configuration diversity in the construction of URCPs, which is most probably due to the weak binding strength between the host and guest molecules. Specifically, based on the monodentate coordination of the end carboxyl groups of C8BPCA forced by the surrounding unilaterally-chelated oxalate, the entire flexible pseudorotaxane linker will be more likely to undergo conformational change, thereby binding to the uranyl center from both sides of the uranyl equatorial plane and promoting the formation of a kinked helix structure of URCP3 that is shaped like a Chinese knot along [001]. This work enriches the library of actinide-rotaxane compounds and provides a new approach to construct metal-organic compounds with complicated structures using weakly bonded pseudorotaxanes as well.
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Affiliation(s)
- Fei-Ze Li
- Key Laboratory of Radiation Physics and Technology (Sichuan University); Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, P. R. China.,Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Lei Mei
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Shu-Wen An
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Kong-Qiu Hu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.,Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, P. R. China
| | - Ning Liu
- Key Laboratory of Radiation Physics and Technology (Sichuan University); Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, P. R. China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
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131
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Preferential encapsulation of different conformers of ethyl 5-(4-dimethylaminophenyl)-3-amino-2,4-dicyanobenzoate in γ-cyclodextrins. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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132
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Jayapaul J, Schröder L. Probing Reversible Guest Binding with Hyperpolarized 129Xe-NMR: Characteristics and Applications for Cucurbit[ n]urils. Molecules 2020; 25:E957. [PMID: 32093412 PMCID: PMC7070628 DOI: 10.3390/molecules25040957] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 02/14/2020] [Accepted: 02/18/2020] [Indexed: 01/01/2023] Open
Abstract
Cucurbit[n]urils (CB[n]s) are a family of macrocyclic host molecules that find various applications in drug delivery, molecular switching, and dye displacement assays. The CB[n]s with n = 5-7 have also been studied with 129Xe-NMR. They bind the noble gas with a large range of exchange rates. Starting with insights from conventional direct detection of bound Xe, this review summarizes recent achievements with chemical exchange saturation transfer (CEST) detection of efficiently exchanging Xe in various CB[n]-based supramolecular systems. Unprecedented sensitivity has been reached by combining the CEST method with hyperpolarized Xe, the production of which is also briefly described. Applications such as displacement assays for enzyme activity detection and rotaxanes as emerging types of Xe biosensors are likewise discussed in the context of biomedical applications and pinpoint future directions for translating this field to preclinical studies.
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Affiliation(s)
| | - Leif Schröder
- Molecular Imaging, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany;
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133
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Wu H, Chen H, Tang B, Kang Y, Xu JF, Zhang X. Host-Guest Interactions between Oxaliplatin and Cucurbit[7]uril/Cucurbit[7]uril Derivatives under Pseudo-Physiological Conditions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:1235-1240. [PMID: 31941282 DOI: 10.1021/acs.langmuir.9b03325] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Compared with conventional drug delivery systems (DDSs), DDSs based on host-guest interactions possess unique advantages, such as high selectivity, tunable binding ability, and controllable release of drugs. It is important to study the host-guest interactions between the carrier and drug under physiological conditions for constructing DDSs. In this work, we have studied the host-guest interaction between cucurbit[7]uril (CB[7]) and oxaliplatin (OxPt), a clinical antitumor drug, in the cell culture medium. The results show that amino acids such as phenylalanine in the 1640 culture medium can partially occupy the cavity of CB[7], which leads to the decrease of enthalpy changes of the host-guest interaction between OxPt and CB[7]. In addition, inorganic salts such as NaCl in the medium reduce the enthalpy change and increase the entropy change of the binding because of the preorganization of the portal of CB[7] and sodium cation. As a result, the binding constant of CB[7] with OxPt in the 1640 culture medium is 1/20 of that in pure water. When CB[7] is modified at the terminal of star-type PEG to construct the star-PEGylated CB[7], it is shown that the molecular weight and topological structure of the PEG polymer backbone exhibit little effect on the host-guest interactions between CB[7] and OxPt. This study enriches the host-guest chemistry of cucurbiturils and may provide guidance for constructing novel DDSs based on host-guest interactions with high loading and releasing efficiency.
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Affiliation(s)
- Han Wu
- 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
| | - Bohan Tang
- 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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134
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Li Q, Jie K, Huang F. Highly Selective Separation of Minimum‐Boiling Azeotrope Toluene/Pyridine by Nonporous Adaptive Crystals of Cucurbit[6]uril. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916041] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Qing Li
- State Key Laboratory of Chemical EngineeringCenter for Chemistry of High-Performance & Novel MaterialsDepartment of ChemistryZhejiang University Hangzhou 310027 P. R. China
| | - Kecheng Jie
- State Key Laboratory of Chemical EngineeringCenter for Chemistry of High-Performance & Novel MaterialsDepartment of ChemistryZhejiang University Hangzhou 310027 P. R. China
| | - Feihe Huang
- State Key Laboratory of Chemical EngineeringCenter for Chemistry of High-Performance & Novel MaterialsDepartment of ChemistryZhejiang University Hangzhou 310027 P. R. China
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135
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Liang J, Nuhnen A, Millan S, Breitzke H, Gvilava V, Buntkowsky G, Janiak C. Encapsulation of a Porous Organic Cage into the Pores of a Metal–Organic Framework for Enhanced CO
2
Separation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jun Liang
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic 7098 Liuxian Blvd Nanshan District Shenzhen 518055 China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Alexander Nuhnen
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Simon Millan
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Hergen Breitzke
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Vasily Gvilava
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Gerd Buntkowsky
- Eduard-Zintl-Institut für Anorganische und Physikalische ChemieTechnische Universität Darmstadt Alarich-Weiss-Straße 4 64287 Darmstadt Germany
| | - Christoph Janiak
- Hoffmann Institute of Advanced MaterialsShenzhen Polytechnic 7098 Liuxian Blvd Nanshan District Shenzhen 518055 China
- Institut für Anorganische Chemie und StrukturchemieHeinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
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136
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Grishaeva TN, Masliy AN, Kuznetsov AM. Structural Features of the Inclusion Compound Based on the trans-[Co(en)2Cl2]+ Complex and Cucurbit[8]Uril: A DFT Study. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476619120035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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137
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Wu G, Clarke DE, Wu C, Scherman OA. Oligopeptide-CB[8] complexation with switchable binding pathways. Org Biomol Chem 2020; 17:3514-3520. [PMID: 30892363 DOI: 10.1039/c9ob00592g] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Host-guest complexes exhibiting a 1 : 1 binding stoichiometry need not consist of a single host and guest. A series of oligopeptides, which were previously reported to have abnormally high binding enthalpies were investigated to deduce whether they exist as a 2 : 2 quaternary or a 1 : 1 binary complex with cucurbit[8]uril (CB[8]). Through a systematic study of the sequence-specific binding pathways of peptide-CB[8] association, a phenylalanine-leucine dipeptide was found to be capable of switching from a 1 : 1 stoichiometric complex to a 2 : 1 complex. By studying the differences in size-based diffusion properties of these two binding modes, the presence of a 1 : 1 pairwise inclusion complex was verified for the regime where CB[8] is in excess. Findings in this study can be utilised to 'customise' the precise CB[8]-oligopeptide self-assembly pathway, acting as a useful toolbox in the design of supramolecular systems.
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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.
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138
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An SW, Mei L, Hu KQ, Zhang ZH, Xia CQ, Chai ZF, Shi WQ. Noncomplexed Cucurbituril-Mediated Structural Evolution of Layered Uranyl Terephthalate Compounds. Inorg Chem 2020; 59:943-955. [PMID: 31815447 DOI: 10.1021/acs.inorgchem.9b03215] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Template synthesis is one of the most feasible ways to explore new uranyl compounds with intriguing structures and properties. Here we demonstrate the preparation of six novel "sandwichlike" uranyl coordination polymers (UCPs) based on two-dimensional uranyl-terephthalate acid (H2TP) networks using CBn (n = 5, 6, 8) as template ligands in the presence of different cations (Na+, K+, Cs+, or H2N(CH3)2+). Compound 1 ([UO2(TP)2][Na2(CB5)(H2O)](H2O)5) is composed of layered uranyl-TP networks with the complex of CB5 and sodium cations as template ligands. In compound 2 ([(UO2)2(TP)3]2(CB6)(H2O)10), CB6 located between uranyl-TP networks contacts them by π-π interactions and hydrogen bonds. Compound 3 ([(UO2)2(TP)3]2[Na2(H2O)10(CB6)]) is the same as compound 2 except for sodium cations bonding with CB6. Similarly in compound 4 ([(UO2)2(TP)3][Cs(H2O)3(CB6)]), CB6 is a capsulelike structure capped with two cesium cations and interacts with uranyl-TP networks through π-π and C-H···π interactions. Compound 5 ([(UO2)2(TP)3(HCOO)2][K(H2O)2(CB5)]2[H2N(CH3)2]2(CB6)(H2O)6) consists of both templates of CB6 and CB5 in which each CB5 is capped with one potassium cation while the H2N(CH3)2+ cation is held at CB6 portals. In compound 6 ([(UO2)2(TP)3]2[UO2(TP)2(H2O)2][Cs(CB8)3(H2O)4](H2O)16), CB8 ligands are connected by cesium cations to form a triangle motif and are further located between the uranyl-TP networks as template agents. All of the 2D layered structures with free CBn or cation-anchored CBn intercalate into the laminates of uranyl-terephthalate and shows a cucurbituril-mediated structural evolution. The regulating role of CBn as structure-directing template agents for the construction of layered UCPs through outer-surface interactions with layers of uranyl terephthalate is demonstrated, especially for the case of CB6 with contractive interlayer spacing.
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Affiliation(s)
- Shu-Wen An
- College of Chemistry , Sichuan University , Chengdu 610064 , China.,Laboratory of Nuclear Energy Chemistry , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Lei Mei
- Laboratory of Nuclear Energy Chemistry , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Kong-Qiu Hu
- Laboratory of Nuclear Energy Chemistry , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Zhi-Hui Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center , Changzhou University , 213164 Changzhou , China
| | - Chuan-Qin Xia
- College of Chemistry , Sichuan University , Chengdu 610064 , China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China.,Engineering Laboratory of Advanced Energy Materials , Ningbo Institute of Industrial Technology, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry , Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
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139
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Costa AL, Gomes AC, Lopes AD, Da Silva JP, Pillinger M, Gonçalves IS, Seixas de Melo JS. Evaluation of the supramolecular interaction of Congo red with cucurbiturils using mass spectrometry and spectroscopic methods. NEW J CHEM 2020. [DOI: 10.1039/c9nj05706d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cucurbit[n]urils decolourise aqueous solutions of Congo red by forming outer-surface adducts, which are also detected in gas-phase ESI-MS studies.
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Affiliation(s)
- Ana L. Costa
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - Ana C. Gomes
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - André D. Lopes
- CCMar, and Department of Chemistry and Pharmacy
- FCT
- University of the Algarve
- P-8005-039 Faro
- Portugal
| | - José P. Da Silva
- CCMar, and Department of Chemistry and Pharmacy
- FCT
- University of the Algarve
- P-8005-039 Faro
- Portugal
| | - Martyn Pillinger
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - Isabel S. Gonçalves
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
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140
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141
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Abstract
Crystallization-driven self-assembly of three macrocyclic members of the cucurbit[n]uril family is explained by the cumulative effect of multiple C–H⋯O hydrogen bonds.
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Affiliation(s)
- Oksana Danylyuk
- Institute of Physical Chemistry, Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Volodymyr Sashuk
- Institute of Physical Chemistry, Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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142
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Lin RL, Liu JX, Chen K, Redshaw C. Supramolecular chemistry of substituted cucurbit[ n]urils. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00529k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review covers important advances in the field of substituted cucurbit[n]urils.
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Affiliation(s)
- Rui-Lian Lin
- College of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002
- P. R. China
| | - Jing-Xin Liu
- College of Chemistry and Chemical Engineering
- Anhui University of Technology
- Maanshan 243002
- P. R. 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
- Nanjing 210044
| | - Carl Redshaw
- Department of Chemistry & Biochemistry
- University of Hull
- Hull HU6 7RX
- UK
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143
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Brady KG, Gilberg L, Sigwalt D, Bistany-Riebman J, Murkli S, Klemm J, Kulhánek P, Šindelář V, Isaacs L. Conformationally Mobile Acyclic Cucurbit[n]uril-Type Receptors Derived from an S-shaped Methylene Bridged Glycoluril Pentamer. Supramol Chem 2020; 32:479-494. [PMID: 33731981 DOI: 10.1080/10610278.2020.1795173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report the synthesis of the conformationally mobile S-shaped glycoluril pentamer building block 3a and two new acyclic CB[n]-type receptors P1 and P2. P1 (9 mM) and P2 (11 mM) have moderate aqueous solubility but their host•guest complexes are poorly soluble. Host P1 does not undergo intermolecular self-association whereas P2 does (Ks = 189±27 M-1). 1H NMR titrations show that P1 and P2 are poor hosts toward hydrophobic (di)cations 6 - 11 (P1: Ka = 375-1400 M-1; P2: Ka = 1950-19800 M-1) compared to Tet1 and Tet2 (Tet1: Ka = 3.09 × 106 to 4.69 × 108 M-1; Tet2: Ka = 4.59 × 108 to 1.30 × 1010 M-1). Molecular modelling shows that P1 and P2 exist as a mixture of three different conformers due to the two S-shaped methylene bridged glycoluril dimer subunits that each possess two different conformations. The lowest energy conformers of P1 and P2 do not feature a well-defined central cavity. In the presence of guests, P2 adapts its conformation to form 1:1 P2•guest complexes; the binding free energy pays the energetic price of conformer selection. This energetically unfavorable conformer selection results in significantly decreased Ka values of P1 and P2 compared to Tet1 and Tet2.
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Affiliation(s)
- Kimberly G Brady
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Laura Gilberg
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States.,Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - David Sigwalt
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Joshua Bistany-Riebman
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Steven Murkli
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Jared Klemm
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Petr Kulhánek
- CEITEC - Central European Institute of Technology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Vladimír Šindelář
- Department of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Lyle Isaacs
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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144
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Zhang J, Hou S, Chen Y, Zhou J, Chen H, Tan Y. Dual-cross-linked dynamic hydrogels with cucurbit[8]uril and imine linkages. SOFT MATTER 2019; 15:9797-9804. [PMID: 31746924 DOI: 10.1039/c9sm01597c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The strategy of dual cross-linking was investigated by enhancing the performance of dynamic hydrogels. To this end, phenylalanine modified ε-polylysine was synthesized and employed as the polymer backbone of hydrogels. The phenylalanine moieties and amine groups of the polymer could be cross-linked with cucurbit[8]uril (CB[8]) and the dialdehyde cross-linker, respectively. Single CB[8] linkage with fast dynamics led to an increase in the viscosity of the polymer solution, and single imine linkage with slow dynamics led to the formation of weak and brittle hydrogels. However, the two linkages were combined together to form a dual-cross-linked hydrogel and the performance of the hydrogel could be well enhanced. Compared with the single imine cross-linked hydrogel, the dual-cross-linked hydrogel demonstrated a higher mechanical strength, better extensibility and faster self-healing rate. It is anticipated that this line of research could provide a useful method to enhance the performance of dynamic hydrogels.
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Affiliation(s)
- Jin Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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145
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Zheng Y, Kaifer AE. Ternary Complex Formation by Cucurbit[7]uril Leads to Large Shifts in the Reduction Potentials of Suitable Viologens. ChemElectroChem 2019. [DOI: 10.1002/celc.201901641] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yeting Zheng
- Department of Chemistry University of Miami Coral Gables FL 33124 U.S.A. E-mail
| | - Angel E. Kaifer
- Department of Chemistry University of Miami Coral Gables FL 33124 U.S.A. E-mail
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146
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Wu D, Cao M, You H, Zhao C, Cao R. N-Doped holey carbon materials derived from a metal-free macrocycle cucurbit[6]uril assembly as an efficient electrocatalyst for the oxygen reduction reaction. Chem Commun (Camb) 2019; 55:13832-13835. [PMID: 31681921 DOI: 10.1039/c9cc06939a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of the preparation of nitrogen-doped holey carbon (NHC) with abundant in-plane holes derived from a rigid macrocycle cucurbit[6]uril self-assembly is reported. The NHC shows comparable activity, better stability and higher methanol tolerance towards the oxygen reduction reaction compared to the use of commercial Pt/C.
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Affiliation(s)
- Dongshuang Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy Sciences, Fuzhou, 350002, China.
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147
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148
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Ghosh SK, Dhamija A, Ko YH, An J, Hur MY, Boraste DR, Seo J, Lee E, Park KM, Kim K. Superacid-Mediated Functionalization of Hydroxylated Cucurbit[n]urils. J Am Chem Soc 2019; 141:17503-17506. [DOI: 10.1021/jacs.9b09639] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Suman Kr Ghosh
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | - Avinash Dhamija
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | - Young Ho Ko
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | | | - Moon Young Hur
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | - Deepak Ramdas Boraste
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | | | - Eunsung Lee
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | - Kyeng Min Park
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
| | - Kimoon Kim
- Center for Self-assembly and Complexity, Institute for Basic Science, Pohang 37673, Republic of Korea
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149
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Xiao B, Wang Q, Zhang S, Li XY, Long SQ, Xiao Y, Xiao S, Ni XL. Cucurbit[7]uril-anchored polymer vesicles enhance photosensitization in the nucleus. J Mater Chem B 2019; 7:5966-5971. [PMID: 31524915 DOI: 10.1039/c9tb01526d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effective photosensitizers (PSs) are highly desirable in many applications, such as photodynamic therapy and catalytic chemistry. Here, we demonstrated that vesicles of cucurbit[7]uril (Q[7] or CB[7])-anchored polymers enhanced photosensitization in the nucleus. The polyacrylic acid chain spacer triggered Q[7] polymers on the surfaces of the vesicles at a regular distance, thus not only leading to efficient inhibition of the aggregation induced self-quenching of the porphyrin based cationic PS in aqueous solution but also maintaining the PS at high concentration on the nanoscale via stable host-guest interactions. Further experiments indicated that Q[7] polymer based vesicles as a PS loading vehicle had a high penetration depth, entering the nuclei of cancer cells. Therefore, highly enhanced photosensitization and efficient anticancer effects were achieved.
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Affiliation(s)
- Bo Xiao
- Department of Chemistry, School of Basic Medical Science, Guizhou Medical University, Guiyang 550025, China.
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150
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Electrogenerated chemiluminescence of cucurbit[n]urils modified electrode and its sensing application. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113404] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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