1
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Anderson A, García-Fandiño R, Piñeiro Á, O'Connor MS. Unraveling the molecular dynamics of sugammadex-rocuronium complexation: A blueprint for cyclodextrin drug design. Carbohydr Polym 2024; 334:122018. [PMID: 38553217 DOI: 10.1016/j.carbpol.2024.122018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 04/02/2024]
Abstract
Sugammadex, marketed as Bridion™, is an approved cyclodextrin (CD) based drug for the reversal of neuromuscular blockade in adults undergoing surgery. Sugammadex forms an inclusion complex with the neuromuscular blocking agent (NMBA) rocuronium, allowing rapid reversal of muscle paralysis. In silico methods have been developed for studying CD inclusion complexes, aimed at accurately predicting their structural, energetic, dynamic, and kinetic properties, as well as binding constants. Here, a computational study aimed at characterizing the sugammadex-rocuronium system from the perspective of docking calculations, free molecular dynamics (MD) simulations, and biased metadynamics simulations with potential of mean force (PMF) calculations is presented. The aim is to provide detailed information about this system, as well as to use it as a model system for validation of the methods. This method predicts results in line with experimental evidence for both the optimal structure and the quantitative value for the binding constant. Interestingly, there is a less profound preference for the orientation than might be assumed based on electrostatic interactions, suggesting that both orientations may exist in solution. These results show that this technology can efficiently analyze CD inclusion complexes and could be used to facilitate the development and optimization of novel applications for CDs.
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Affiliation(s)
- Amelia Anderson
- Cyclarity Therapeutics, 8001 Redwood Blvd Novato, CA 94945, USA; Department of Organic Chemistry, Center for Research in Biological Chemistry and Molecular Materials, Santiago de Compostela University, CIQUS, Spain; Soft Matter & Molecular Biophysics Group, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Spain.
| | - Rebeca García-Fandiño
- Department of Organic Chemistry, Center for Research in Biological Chemistry and Molecular Materials, Santiago de Compostela University, CIQUS, Spain
| | - Ángel Piñeiro
- Soft Matter & Molecular Biophysics Group, Department of Applied Physics, Faculty of Physics, University of Santiago de Compostela, Spain
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2
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Saffarionpour S, Diosady LL. Cyclodextrins and their potential applications for delivering vitamins, iron, and iodine for improving micronutrient status. Drug Deliv Transl Res 2024:10.1007/s13346-024-01586-x. [PMID: 38671315 DOI: 10.1007/s13346-024-01586-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2024] [Indexed: 04/28/2024]
Abstract
Cyclodextrins (CDs) have been investigated as potential biopolymeric carriers that can form inclusion complexes with numerous bioactive ingredients. The inclusion of micronutrients (e.g. vitamins or minerals) into cyclodextrins can enhance their solubility and provide oxidative or thermal stability. It also enables the formulation of products with extended shelf-life. The designed delivery systems with CDs and their inclusion complexes including electrospun nanofibers, emulsions, liposomes, and hydrogels, show potential in enhancing the solubility and oxidative stability of micronutrients while enabling their controlled and sustained release in applications including food packaging, fortified foods and dietary supplements. Nano or micrometer-sized delivery systems capable of controlling burst release and permeation, or moderating skin hydration have been reported, which can facilitate the formulation of several personal and skin care products for topical or transdermal delivery of micronutrients. This review highlights recent developments in the application of CDs for the delivery of micronutrients, i.e. vitamins, iron, and iodine, which play key roles in the human body, emphasizing their existing and potential applications in the food, pharmaceuticals, and cosmeceuticals industries.
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Affiliation(s)
| | - Levente L Diosady
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
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3
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Anderson AM, Manet I, Malanga M, Clemens DM, Sadrerafi K, Piñeiro Á, García-Fandiño R, O'Connor MS. Addressing the complexities in measuring cyclodextrin-sterol binding constants: A multidimensional study. Carbohydr Polym 2024; 323:121360. [PMID: 37940263 DOI: 10.1016/j.carbpol.2023.121360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/22/2023] [Accepted: 08/30/2023] [Indexed: 11/10/2023]
Abstract
A class of cyclodextrin (CD) dimers has emerged as a potential new treatment for atherosclerosis; they work by forming strong, soluble inclusion complexes with oxysterols, allowing the body to reduce and heal arterial plaques. However, characterizing the interactions between CD dimers and oxysterols presents formidable challenges due to low sterol solubility, the synthesis of modified CDs resulting in varying number and position of molecular substitutions, and the diversity of interaction mechanisms. To address these challenges and illuminate the nuances of CD-sterol interactions, we have used multiple orthogonal approaches for a comprehensive characterization. Results obtained from three independent techniques - metadynamics simulations, competitive isothermal titration calorimetry, and circular dichroism - to quantify CD-sterol binding are presented. The objective of this study is to obtain the binding constants and gain insights into the intricate nature of the system, while accounting for the advantages and limitations of each method. Notably, our findings demonstrate ∼1000× stronger affinity of the CD dimer for 7-ketocholesterol in comparison to cholesterol for the 1:1 complex in direct binding assays. These methodologies and findings not only enhance our understanding of CD dimer-sterol interactions, but could also be generally applicable to prediction and quantification of other challenging host-guest complex systems.
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Affiliation(s)
- Amelia M Anderson
- Cyclarity Therapeutics, 8001 Redwood Blvd Novato, CA 94945, USA; Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain; Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, Campus Vida s/n, E-15782 Santiago de Compostela, Spain
| | - Ilse Manet
- Istituto per la Sintesi Organica e la Fotoreattività (ISOF), Consiglio Nazionale delle Ricerche (CNR), via P. Gobetti 101, Bologna 40129, Italy
| | - Milo Malanga
- CarboHyde, Budapest, Berlini u. 47-49, 1045, Hungary; Cyclolab Cyclodextrin Research and Development Ltd., Budapest, Illatos út 7 1097, Hungary
| | | | | | - Ángel Piñeiro
- Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain; MD.USE Innovative Solutions S.L., Edificio Emprendia, Campus Vida, Santiago de Compostela, Spain
| | - Rebeca García-Fandiño
- Departamento de Química Orgánica, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Universidade de Santiago de Compostela, Campus Vida s/n, E-15782 Santiago de Compostela, Spain; MD.USE Innovative Solutions S.L., Edificio Emprendia, Campus Vida, Santiago de Compostela, Spain
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4
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Hilton KLF, Tolley H, Ortega-Roldan JL, Thompson GS, Sutton JM, Hind CK, Hiscock JR. Phospholipid headgroup composition modulates the molecular interactions and antimicrobial effects of sulfobetaine zwitterionic detergents against the "ESKAPE" pathogen Pseudomonas aeruginosa. Chem Commun (Camb) 2023; 59:10504-10507. [PMID: 37644759 DOI: 10.1039/d3cc02320f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
We determine the efficacy for three known structurally related, membrane active detergents against multidrug resistant and wild type strains of Pseudomonas aeruginosa. Accessible solution state NMR experiments are used to quantify phospholipid headgroup composition of the microbial membranes and to gain molecular level insight into antimicrobial mode of action.
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Affiliation(s)
- Kira L F Hilton
- Division of Natural Sciences, University of Kent, Canterbury, CT2 7NH, UK.
| | - Howard Tolley
- UKHSA, Science Group, Manor Farm Road, Salisbury, SP4 0JG, UK.
| | | | - Gary S Thompson
- Division of Natural Sciences, University of Kent, Canterbury, CT2 7NH, UK.
| | - J Mark Sutton
- UKHSA, Science Group, Manor Farm Road, Salisbury, SP4 0JG, UK.
- Institute of Pharmaceutical Sciences, School of Cancer & Pharmaceutical Sciences King's College London, SE1 9NQ, UK
| | | | - Jennifer R Hiscock
- Division of Natural Sciences, University of Kent, Canterbury, CT2 7NH, UK.
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5
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Luviano AS, Figueroa-Gerstenmaier S, Sarmiento-Gómez E, Rincón-Londoño N. “Non-disruptive Mixing of Cyclodextrins and Wormlike Micelles in the non-dilute regime”. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Rutkauskaite A, White LJ, Hilton KLF, Picci G, Croucher L, Caltagirone C, Hiscock JR. Supramolecular self-associating amphiphiles: determination of molecular self-association properties and calculation of critical micelle concentration using a high-throughput, optical density based methodology. Org Biomol Chem 2022; 20:5999-6006. [PMID: 35147630 DOI: 10.1039/d2ob00066k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Supramolecular self-associating amphiphiles are a class of amphiphilic salt, the anionic component of which is 'frustrated' in nature, meaning multiple hydrogen bonding modes can be accessed simultaneously. Here we derive critical micelle concentration values for four supramolecular self-associating amphiphiles using the standard pendant drop approach and present a new high-throughput, optical density measurement based methodology, to enable the estimation of critical micelle concentrations over multiple temperatures. In addition, we characterise the low-level hydrogen bonded self-association events in the solid state, through single crystal X-ray diffraction, and in polar organic DMSO-d6 solutions using a combination of 1H NMR techniques. Moving into aqueous ethanol solutions (EtOH/H2O or EtOH/D2O (1 : 19 v/v)), we also show these amphiphilic compounds to form higher-order self-associated species through a combination of 1H NMR, dynamic light scattering and zeta potential studies.
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Affiliation(s)
| | - Lisa J White
- School of Chemistry and Forensics, University of Kent, Canterbury, Kent, CT2 7NH, UK.
| | - Kira L F Hilton
- School of Chemistry and Forensics, University of Kent, Canterbury, Kent, CT2 7NH, UK.
| | - Giacomo Picci
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, SS 554 Bivio per Sestu, 09042 Monserrato, CA, Italy.
| | - Lorraine Croucher
- BMG Labtech, 8 Bell Business Park, Aylesbury, Bucks, HP19 8JR, England, UK
| | - Claudia Caltagirone
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, SS 554 Bivio per Sestu, 09042 Monserrato, CA, Italy.
| | - Jennifer R Hiscock
- School of Chemistry and Forensics, University of Kent, Canterbury, Kent, CT2 7NH, UK.
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7
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Mondal M, Basak S, Roy D, Haydar MS, Choudhury S, Ghosh B, Ghosh NN, Dutta A, Mandal P, Roy K, Kumar A, Roy MN. Probing the Molecular Assembly of a Metabolizer Drug with β-Cyclodextrin and Its Binding with CT-DNA in Augmenting Antibacterial Activity and Photostability by Physicochemical and Computational Methodologies. ACS OMEGA 2022; 7:26211-26225. [PMID: 35936474 PMCID: PMC9352218 DOI: 10.1021/acsomega.2c01902] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
The assembly of an inclusion complex in an aqueous medium using a metabolizer drug (dyphylline) as guest and β-cyclodextrin as host has been established, which is extremely appropriate for a variety of applications in modern biomedical sciences. The formation of the inclusion complex is established by 1H NMR, and surface tension and conductivity measurements demonstrate that the inclusion complex was produced with 1:1 stoichiometry. The thermodynamic parameters based on density, viscosity, and refractive index measurements were used to determine the nature of the complex. This research also forecasts how dyphylline will release in the presence of CT-DNA without any chemical modifications. The produced insertion complex (IC) has a higher photostability due to the drug dyphylline being protected by β-CD. The antibacterial activity of dyphylline greatly improved after complexation and exhibited higher toxicity against Gram-negative (highest against Escherichia coli) in comparison to Gram-positive bacteria. The encapsulation mode of the dyphylline molecule into the cavity of the β-CD was also investigated using DFT to confirm preliminary results.
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Affiliation(s)
- Modhusudan Mondal
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, India
| | - Shatarupa Basak
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, India
| | - Debadrita Roy
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, India
| | - Md Salman Haydar
- Nanobiology
and Phytotherapy Laboratory, Department of Botany, University of North Bengal, Darjeeling 734013, India
| | | | - Biswajit Ghosh
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, India
| | | | - Ankita Dutta
- Department
of Biotechnology, University of North Bengal, Darjeeling 734013, India
| | - Palash Mandal
- Nanobiology
and Phytotherapy Laboratory, Department of Botany, University of North Bengal, Darjeeling 734013, India
| | - Kanak Roy
- Department
of Chemistry, Alipurduar University, Alipurduar 736122, India
| | - Anoop Kumar
- Department
of Biotechnology, University of North Bengal, Darjeeling 734013, India
| | - Mahendra Nath Roy
- Department
of Chemistry, University of North Bengal, Darjeeling 734013, India
- Vice-Chancellor, Alipurduar University, Alipurduar 736122, India
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8
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Mondal M, Basak S, Roy D, Saha S, Ghosh B, Ali S, Ghosh NN, Dutta A, Kumar A, Roy MN. Cyclic oligosaccharides as controlled release complexes with food additives (TZ) for reducing hazardous effects. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Garrido PF, Bastos M, Velázquez-Campoy A, Amigo A, Dumas P, Piñeiro Á. Unsupervised bubble calorimetry analysis: Surface tension from isothermal titration calorimetry. J Colloid Interface Sci 2022; 606:1823-1832. [PMID: 34507173 DOI: 10.1016/j.jcis.2021.08.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/13/2021] [Accepted: 08/14/2021] [Indexed: 11/18/2022]
Abstract
HYPOTHESIS The injection of air into the sample cell of an isothermal titration calorimeter containing a liquid provides a rich-in-information signal, with a periodic contribution arising from the creation, growing and release of bubbles. The identification and analysis of such contributions allow the accurate determination of the surface tension of the target liquid. EXPERIMENTS Air is introduced at a constant rate into the sample cell of the calorimeter containing either a pure liquid or a solution. The resulting calorimetric signal is analyzed by a new algorithm, which is implemented into a computational code. FINDINGS The thermal power generated by our experiments is often noisy, thus hiding the periodic signal arising from the bubbles' formation and release. The new algorithm was tested with a range of different types of calorimetric raw data, some of them apparently being just noise. In all cases, the contribution of the bubbles to the signal was isolated and the corresponding period was successfully determined in an automated way. It is also shown that two reference measurements suffice to calibrate the instrument at a given temperature, regardless the injection rate, allowing the direct determination of surface tension values for the liquid contained in the sample cell.
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Affiliation(s)
- Pablo F Garrido
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Margarida Bastos
- CIQ-UP, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
| | - Adrián Velázquez-Campoy
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Joint Units IQFR-CSIC-BIFI, and GBsC-CSIC-BIFI, Universidad de Zaragoza, Zaragoza 50018, Spain; Department of Biochemistry and Molecular and Cell Biology, Universidad de Zaragoza, 50009 Zaragoza, Spain; Aragon Institute for Health Research (IIS Aragon), 50009 Zaragoza, Spain; Biomedical Research Networking Centre for Liver and Digestive Diseases (CIBERehd), 28029 Madrid, Spain; Fundacion ARAID, Government of Aragon, 50018 Zaragoza, Spain
| | - Alfredo Amigo
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - Philippe Dumas
- IGBMC, Dept of Integrative Biology, Strasbourg University, F67404 Illkirch CEDEX, France
| | - Ángel Piñeiro
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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10
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An extensive investigation on supramolecular assembly of a drug (MEP) with βCD for innovative applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117977] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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11
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Bayat F, Homami SS, Monzavi A, Talei Bavil Olyai MR. A combined molecular docking and molecular dynamics simulation approach to probing the host–guest interactions of Ataluren with natural and modified cyclodextrins. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1991921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Farhad Bayat
- Deptartment of Applied Chemistry, Faculty of Science, South Tehran Branch, Islamic Azad University, Tehran, Iran
- Department of Biotechnology, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Saied Homami
- Deptartment of Applied Chemistry, Faculty of Science, South Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Amirhossein Monzavi
- Deptartment of Polymer and Textile Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
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12
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Xiao Z, Zhang Y, Niu Y, Ke Q, Kou X. Cyclodextrins as carriers for volatile aroma compounds: A review. Carbohydr Polym 2021; 269:118292. [PMID: 34294318 DOI: 10.1016/j.carbpol.2021.118292] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/20/2021] [Accepted: 05/31/2021] [Indexed: 12/12/2022]
Abstract
Cyclodextrins (CDs) are edible and biocompatible natural cyclic compounds that can encapsulate essential oils, flavours, volatile aroma compounds, and other substances. Complexation with CD-based materials improves the solubility and stability of volatile compounds and protects the bioactivity of the core materials. Therefore, the development of CD/volatile compound nanosystems is a key research area in the food, cosmetic, and pharmaceutical industries. This review briefly introduces the main types of natural CD; preparation methods of CD-based materials as carriers for aromatic substances or essential oils; characterisation methods used to calculate the interaction between CDs and volatile aroma compounds; molecular docking and simulation methods; and the application of CD-based nanosystems in different industries. The review aims to provide guidance for relevant practitioners in selecting appropriate CD materials and characterisation methods.
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Affiliation(s)
- Zuobing Xiao
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China
| | - Yaqi Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China
| | - Yunwei Niu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China
| | - Qinfei Ke
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China
| | - Xingran Kou
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, No. 100 Haiquan Road, Shanghai 201418, China; Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China.
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13
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Garrido PF, Bastos M, Velázquez-Campoy A, Dumas P, Piñeiro Á. Fluid interface calorimetry. J Colloid Interface Sci 2021; 596:119-129. [PMID: 33839346 DOI: 10.1016/j.jcis.2021.03.098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 10/21/2022]
Abstract
HYPOTHESIS Amphiphilic molecules spontaneously adsorb to fluid polar-nonpolar interfaces. The timescale of such adsorption depends on the molecular size and structure of the solute. This process should be accompanied by a power heat exchange that could be detected by commercial isothermal calorimeters. EXPERIMENTS Air is injected in the bulk of different aqueous solutions contained in the sample cell of an isothermal titration calorimeter. The formation of the resulting bubbles leads to a liquid/air interface to which the solute molecules spontaneously adsorb. Continuous injection experiments to produce multiple bubbles as well as experiments with static bubbles stand from the capillary tip, aiming to observe slow adsorption processes, were performed. FINDINGS The power associated with the formation, growth and release of air bubbles in different liquids was measured. Different independent contributions that can be associated to the pressure change in the gas phase, the evaporation-condensation of the solvent, the increase of interfacial area, the change in the heat capacity of the sample cell content, and the release of the bubble were observed. The periodic pattern produced by the continuous injection of air at a constant rate is used to determine the surface tension of different liquids, including solutions of different molecules and (bio)macromolecules.
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Affiliation(s)
- Pablo F Garrido
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - Margarida Bastos
- CIQ-UP, Departamento de Quimica e Bioquimica, Faculdade de Ciencias da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
| | - Adrián Velázquez-Campoy
- Institute of Biocomputation and Physics of Complex Systems (BIFI), Joint Units IQFR-CSIC-BIFI, and GBsC-CSIC-BIFI, Universidad de Zaragoza, Zaragoza 50018, Spain; Department of Biochemistry and Molecular and Cell Biology, Universidad de Zaragoza, 50009 Zaragoza, Spain; Aragon Institute for Health Research (IIS Aragon), 50009 Zaragoza, Spain; Biomedical Research Networking Centre for Liver and Digestive Diseases (CIBERehd), 28029 Madrid, Spain; Fundacion ARAID, Government of Aragon, 50018 Zaragoza, Spain
| | - Philippe Dumas
- IGBMC, Dept of Integrative Biology, Strasbourg University, F67404 Illkirch CEDEX, France
| | - Ángel Piñeiro
- Departamento de Fisica de Aplicada, Facultade de Fisica, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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14
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Bomzan P, Roy N, Sharma A, Rai V, Ghosh S, Kumar A, Roy MN. Molecular encapsulation study of indole-3-methanol in cyclodextrins: Effect on antimicrobial activity and cytotoxicity. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129093] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Jeevan AK, Krishnan SB, Gopidas KR. Structural Deformation to
β
‐Cyclodextrin Due to Strong π‐Stacking in the Self‐Assembly of Inclusion Complex. ChemistrySelect 2020. [DOI: 10.1002/slct.202004488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Athira K. Jeevan
- Chemical Sciences and Technology Division CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram 695 019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad - 200 002 India
| | - Sumesh B. Krishnan
- Chemical Sciences and Technology Division CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram 695 019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad - 200 002 India
| | - Karical R. Gopidas
- Chemical Sciences and Technology Division CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram 695 019 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad - 200 002 India
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16
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White LJ, Boles JE, Hilton KLF, Ellaby RJ, Hiscock JR. Towards the Application of Supramolecular Self-Associating Amphiphiles as Next-Generation Delivery Vehicles. Molecules 2020; 25:E4126. [PMID: 32917007 PMCID: PMC7570936 DOI: 10.3390/molecules25184126] [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: 07/31/2020] [Revised: 09/02/2020] [Accepted: 09/08/2020] [Indexed: 12/16/2022] Open
Abstract
Herein, we present a series of supramolecular self-associating amphiphilic (SSA) salts and establish the potential for these molecular constructs to act as next-generation solution-state molecular delivery vehicles. We characterise the self-association of these SSAs, both alone and when co-formulated with a variety of drug(like) competitive guest species. Single crystal X-ray diffraction studies enable the observation of hydrogen-bonded self-association events in the solid state, whilst high resolution mass spectrometry confirms the presence of anionic SSA dimers in the gas-phase. These same anionic SSA dimeric species are also identified within a competitive organic solvent environment (DMSO-d6/0.5% H2O). However, extended self-associated aggregates are observed to form under aqueous conditions (H2O/5.0% EtOH) in both the absence and presence of these competitive guest species. Finally, through the completion of these studies, we present a framework to support others in the characterisation of such systems.
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Affiliation(s)
| | | | | | | | - Jennifer R. Hiscock
- School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, UK; (L.J.W.); (J.E.B.); (K.L.F.H.); (R.J.E.)
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17
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Ng KKL, Dimitrovski M, Boles JE, Ellaby RJ, White LJ, Hiscock JR. Towards the use of (pseudo) nucleobase substituted amphiphiles as DNA nucleotide mimics and antimicrobial agents. Supramol Chem 2020. [DOI: 10.1080/10610278.2020.1755038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
| | | | - Jessica E. Boles
- School of Physical Sciences, University of Kent, Canterbury, UK
- School of Biosciences, University of Kent, Canterbury, UK
| | | | - Lisa J. White
- School of Physical Sciences, University of Kent, Canterbury, UK
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18
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Roy A, Saha S, Roy D, Bhattacharyya S, Roy MN. Formation & specification of host–guest inclusion complexes of an anti-malarial drug inside into cyclic oligosaccharides for enhancing bioavailability. J INCL PHENOM MACRO 2020. [DOI: 10.1007/s10847-020-00984-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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19
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Erdős M, Hartkamp R, Vlugt TJH, Moultos OA. Inclusion Complexation of Organic Micropollutants with β-Cyclodextrin. J Phys Chem B 2020; 124:1218-1228. [PMID: 31976678 PMCID: PMC7037149 DOI: 10.1021/acs.jpcb.9b10122] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
![]()
Recently, β-cyclodextrin
(βCD)-based polymers with
enhanced adsorption kinetics and high removal capacity of organic
micropollutants (OMPs) and uptake rates have been synthesized and
tested experimentally. Although the exact physical–chemical
mechanisms via which these polymers capture the various types of OMPs
are not yet fully understood, it is suggested that the inclusion complex
formation of OMPs with βCD is very important. In this study,
the inclusion complex formation of OMPs with βCD in an aqueous
solution is investigated by using the well-established attach–pull–release
method in force field-based molecular dynamics simulations. A representative
set of OMPs is selected based on the measured occurrences in surface
and ground waters and the directives published by the European Union.
To characterize the formation of the inclusion complex, the binding
free energies, enthalpies, and entropies are computed and compared
to experimental values. It is shown that computations using the q4md-CD/GAFF/Bind3P
force field combination yield binding free energies that are in reasonable
agreement with the experimental results for all OMPs studied. The
binding enthalpies are decomposed into the main contributing interaction
types. It is shown that, for all studied OMPs, the van der Waals interactions
are favorable for the inclusion complexion and the hydrogen bond formation
of the guest with the solvent and βCD plays a crucial role in
the binding mechanism. Our findings show that MD simulations can adequately
describe the inclusion complex formation of βCD with OMPs, which
is the first step toward understanding the underlying mechanisms via
which the βCD-based polymers capture OMPs.
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Affiliation(s)
- Máté Erdős
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Remco Hartkamp
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Thijs J H Vlugt
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
| | - Othonas A Moultos
- Engineering Thermodynamics, Process & Energy Department, Faculty of Mechanical, Maritime and Materials Engineering , Delft University of Technology , Leeghwaterstraat 39 , 2628CB Delft , Netherlands
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20
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Martín VI, López-Cornejo P, López-López M, Blanco-Arévalo D, Moreno-Vargas AJ, Angulo M, Laschewsky A, Moyá ML. Influence of the surfactant degree of oligomerization on the formation of cyclodextrin: surfactant inclusion complexes. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.04.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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21
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Ghosh R, Roy K, Subba A, Mandal P, Basak S, Kundu M, Roy MN. Case to case study for exploring inclusion complexes of an anti-diabetic alkaloid with α and β cyclodextrin molecules for sustained dischargement. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.126988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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22
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Luviano AS, Hernández-Pascacio J, Ondo D, Campbell RA, Piñeiro Á, Campos-Terán J, Costas M. Highly viscoelastic films at the water/air interface: α-Cyclodextrin with anionic surfactants. J Colloid Interface Sci 2019; 565:601-613. [PMID: 32032852 DOI: 10.1016/j.jcis.2019.12.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 02/07/2023]
Abstract
This work showcases the remarkable viscoelasticity of films consisting of α-cyclodextrin (α-CD) and anionic surfactants (S) at the water/air interface, the magnitude of which has not been observed in similar systems. The anionic surfactants employed are sodium salts of a homologous series of n-alkylsulfates (n = 8-14) and of dodecylsulfonate. Our hypothesis was that the very high viscoelasticity can be systematically related to the bulk and interfacial properties of the system. Through resolution of the bulk distribution of species using isothermal titration calorimetry, the high dilatational modulus is related to (α-CD)2:S1 inclusion complexes in the bulk with respect to both the bulk composition and temperature. Direct interfacial characterization of α-CD and sodium dodecylsulfate films at 283.15 K using ellipsometry and neutron reflectometry reveals that the most viscoelastic films consist of a highly ordered monolayer of 2:1 complexes with a minimum amount of any other component. The orientation of the complexes in the films and their driving force for adsorption are discussed in the context of results from molecular dynamics simulations. These findings open up clear potential for the design of new functional materials or molecular sensors based on films with specific mechanical, electrical, thermal, chemical, optical or even magnetic properties.
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Affiliation(s)
- Alberto S Luviano
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, CdMx 04510, Mexico; Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, Av. Vasco de Quiroga 4871, Col. Santa Fe, Delegación Cuajimalpa de Morelos, 05348, CdMx, Mexico
| | - Jorge Hernández-Pascacio
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, CdMx 04510, Mexico
| | - Daniel Ondo
- Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
| | - Richard A Campbell
- Institut Laue-Langevin, 71 avenue des Martyrs, 38042 Grenoble, France; Division of Pharmacy and Optometry, University of Manchester, Manchester M13 9PT, United Kingdom.
| | - Ángel Piñeiro
- Departamento de Física de Aplicada, Facultade de Física, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - José Campos-Terán
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, Av. Vasco de Quiroga 4871, Col. Santa Fe, Delegación Cuajimalpa de Morelos, 05348, CdMx, Mexico; Lund Institute of Advanced Neutron and X-ray Science, Lund University, Scheelevägen 19, 223 70 Lund, Sweden.
| | - Miguel Costas
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, CdMx 04510, Mexico.
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23
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Cova TF, Milne BF, Pais AA. Host flexibility and space filling in supramolecular complexation of cyclodextrins: A free-energy-oriented approach. Carbohydr Polym 2019; 205:42-54. [DOI: 10.1016/j.carbpol.2018.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 10/03/2018] [Accepted: 10/03/2018] [Indexed: 12/20/2022]
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24
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Sarkar K, Barman BK, Nath Roy M. Study to explore inclusion complexes of α- and β-cyclodextrin molecules with 3-octyl-1-methylimidazolium bromide with the manifestation of hydrophobic and hydrophilic interactions. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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Study to Probe Subsistence of Host-Guest Inclusion Complexes of α and β-Cyclodextrins with Biologically Potent Drugs for Safety Regulatory Dischargement. Sci Rep 2018; 8:13031. [PMID: 30158645 PMCID: PMC6115366 DOI: 10.1038/s41598-018-31373-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 08/17/2018] [Indexed: 01/02/2023] Open
Abstract
Host-guest interaction of two significant drugs, phenylephrine hydrochloride and synephrine with α and β-cyclodextrins were studied systematically. Initially two simple but reliable physicochemical techniques namely conductance and surface tension were employed to find out saturation concentration for the inclusion and its stoichiometry. The obtained 1:1 stoichiometry was further confirmed by two spectrometric methods, UV-Vis study and spectrofluorimetry. Significant shifts in IR stretching frequency also support the inclusion process. Relative stabilities of the inclusion complexes were established by the association constants obtained from UV-Vis spectroscopic measurements, program based mathematical calculation of conductivity data. Calculations of the thermodynamic parameters dictates thermodynamic feasibility of the inclusion process. Spectrofluorometric measurement scaffolds the UV-Vis spectroscopic measurement validating stability of the ICs once again. Mass spectroscopic measurement gives the molecular ion peaks corresponding to the inclusion complex of 1:1 molar ratio of host and guest molecules. The mechanism of inclusion was drawn by 1H-NMR and 2D ROESY spectroscopic analysis. Surface texture of the inclusion complexes was studied by SEM. Finally, the cytotoxic activities of the inclusion complexes were analyzed and found, Cell viability also balances for non-toxic behavior of the ICs. Moreover, all the studies reveal the formation of inclusion complexes of two ephedra free, alternatively emerging drugs (after their banned product having ephedra) SNP, PEH with α and β-CD which enriches the drug delivery system with their regulatory release without any chemical modification.
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26
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Barman BK, Barman S, Roy MN. Inclusion complexation between tetrabutylphosphonium methanesulfonate as guest and α- and β-cyclodextrin as hosts investigated by physicochemical methodology. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.148] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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27
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Self-Assembly of α-Cyclodextrin and β-Cyclodextrin: Identification and Development of Analytical Techniques. J Pharm Sci 2018; 107:2208-2215. [DOI: 10.1016/j.xphs.2018.03.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/23/2018] [Accepted: 03/30/2018] [Indexed: 12/17/2022]
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28
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Barman BK, Dutta A, Roy MN. Sustenance of Inclusion Complexes of Ionic Liquid with Cyclic Oligosaccharide Molecules in Liquid and Solid Phases by Diverse Approaches. ChemistrySelect 2018. [DOI: 10.1002/slct.201801102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Biraj K Barman
- Department of ChemistryUniversity of North Bengal Darjeeling-734013
| | - Ashutosh Dutta
- Department of ChemistryUniversity of North Bengal Darjeeling-734013
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29
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Micellar coordination clusters based on nonionic surfactant Triton Х-114: stability, possibilities of modification, and peculiarities of reactions with cyclodextrins. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2214-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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White LJ, Tyuleva SN, Wilson B, Shepherd HJ, Ng KKL, Holder SJ, Clark ER, Hiscock JR. Towards the Prediction of Global Solution State Properties for Hydrogen Bonded, Self-Associating Amphiphiles. Chemistry 2018; 24:7761-7773. [PMID: 29633393 PMCID: PMC6055828 DOI: 10.1002/chem.201801280] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 12/20/2022]
Abstract
Through this extensive structure-property study we show that critical micelle concentration correlates with self-associative hydrogen bond complex formation constant, when combined with outputs from low level, widely accessible, computational models. Herein, we bring together a series of 39 structurally related molecules related by stepwise variation of a hydrogen bond donor-acceptor amphiphilic salt. The self-associative and corresponding global properties for this family of compounds have been studied in the gas, solid and solution states. Within the solution state, we have shown the type of self-associated structure present to be solvent dependent. In DMSO, this class of compound show a preference for hydrogen bonded dimer formation, however moving into aqueous solutions the same compounds are found to form larger self-associated aggregates. This observation has allowed us the unique opportunity to investigate and begin to predict self-association events at both the molecular and extended aggregate level.
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Affiliation(s)
- Lisa J. White
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Stilyana N. Tyuleva
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Ben Wilson
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Helena J. Shepherd
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Kendrick K. L. Ng
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Simon J. Holder
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Ewan R. Clark
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
| | - Jennifer R. Hiscock
- School of Physical SciencesUniversity of KentCanterburyKentCT2 7NHUnited Kingdom
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31
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Optimization of the cydex blue assay: A one-step colorimetric protein assay using cyclodextrins and compatible with detergents and reducers. PLoS One 2018; 13:e0195755. [PMID: 29641569 PMCID: PMC5895047 DOI: 10.1371/journal.pone.0195755] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 03/28/2018] [Indexed: 01/21/2023] Open
Abstract
Sodium dodecyl sulfate electrophoresis (SDS) is a protein separation technique widely used, for example, prior to immunoblotting. Samples are usually prepared in a buffer containing both high concentrations of reducers and high concentrations of SDS. This conjunction renders the samples incompatible with common protein assays. By chelating the SDS, cyclodextrins make the use of simple, dye-based colorimetric assays possible. In this paper, we describe the optimization of the assay, focussing on the cyclodextrin/SDS ratio and the use of commercial assay reagents. The adaptation of the assay to a microplate format and using other detergent-containing conventional extraction buffers is also described.
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32
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Altin A, Krzywiecki M, Sarfraz A, Toparli C, Laska C, Kerger P, Zeradjanin A, Mayrhofer KJJ, Rohwerder M, Erbe A. Cyclodextrin inhibits zinc corrosion by destabilizing point defect formation in the oxide layer. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:936-944. [PMID: 29600153 PMCID: PMC5870151 DOI: 10.3762/bjnano.9.86] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
Corrosion inhibitors are added in low concentrations to corrosive solutions for reducing the corrosion rate of a metallic material. Their mechanism of action is typically the blocking of free metal surface by adsorption, thus slowing down dissolution. This work uses electrochemical impedance spectroscopy to show the cyclic oligosaccharide β-cyclodextrin (β-CD) to inhibit corrosion of zinc in 0.1M chloride with an inhibition efficiency of up to 85%. Only a monomolecular adsorption layer of β-CD is present on the surface of the oxide covered metal, with Raman spectra of the interface proving the adsorption of the intact β-CD. Angular dependent X-ray photoelectron spectroscopy (ADXPS) and ultraviolet photoelectron spectroscopy (UPS) were used to extract a band-like diagram of the β-CD/ZnO interface, showing a large energy level shift at the interface, closely resembling the energy level alignment in an n-p junction. The energy level shift is too large to permit further electron transfer through the layer, inhibiting corrosion. Adsorption hence changes the defect density in the protecting ZnO layer. This mechanism of corrosion inhibition shows that affecting the defect chemistry of passivating films by molecular inhibitors maybe a viable strategy to control corrosion of metals.
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Affiliation(s)
- Abdulrahman Altin
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Maciej Krzywiecki
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
- Institute of Physics–CSE, Silesian University of Technology, Konarskiego 22B, 44-100 Gliwice, Poland
| | - Adnan Sarfraz
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Cigdem Toparli
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Claudius Laska
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Philipp Kerger
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Aleksandar Zeradjanin
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Karl J J Mayrhofer
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstraße 3, 91058 Erlangen, Germany
| | - Michael Rohwerder
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
| | - Andreas Erbe
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Str. 1, 40237 Düsseldorf, Germany
- Department of Materials Science and Engineering, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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33
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Preparation, characterization and binding behaviors of host-guest inclusion complexes of metoclopramide hydrochloride with α- and β-cyclodextrin molecules. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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34
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Gebhardt J, Kleist C, Jakobtorweihen S, Hansen N. Validation and Comparison of Force Fields for Native Cyclodextrins in Aqueous Solution. J Phys Chem B 2018; 122:1608-1626. [PMID: 29287148 DOI: 10.1021/acs.jpcb.7b11808] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Molecular dynamics simulations of native α-, β-, and γ-cyclodextrin in aqueous solution have been conducted with the goal to investigate the performance of the CHARMM36 force field, the AMBER-compatible q4md-CD force field, and five variants of the GROMOS force field. The properties analyzed are structural parameters derived from X-ray diffraction and NMR experiments as well as hydrogen bonds and hydration patterns, including hydration free enthalpies. Recent revisions of the torsional-angle parameters for carbohydrate systems within the GROMOS family of force fields lead to a significant improvement of the agreement between simulated and experimental NMR data. Therefore, we recommend using the variant 53A6GLYC instead of 53A6 and 56A6CARBO_R or 2016H66 instead of 56A6CARBO to simulate cyclodextrins in solution. The CHARMM36 and q4md-CD force fields show a similar performance as the three recommended GROMOS parameter sets. A significant difference is the more flexible nature of the cyclodextrins modeled with the CHARMM36 and q4md-CD force fields compared to the three recommended GROMOS parameter sets.
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Affiliation(s)
- Julia Gebhardt
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart , D-70569 Stuttgart, Germany
| | - Catharina Kleist
- Institute of Thermal Separation Processes, Hamburg University of Technology , D-21073 Hamburg, Germany
| | - Sven Jakobtorweihen
- Institute of Thermal Separation Processes, Hamburg University of Technology , D-21073 Hamburg, Germany
| | - Niels Hansen
- Institute of Thermodynamics and Thermal Process Engineering, University of Stuttgart , D-70569 Stuttgart, Germany
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35
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Kim SY, Lee JD, Cho YJ, Son MR, Son HJ, Cho DW, Kang SO. Excitation spectroscopic and synchronous fluorescence spectroscopic analysis of the origin of aggregation-induced emission in N,N-diphenyl-1-naphthylamine-o-carborane derivatives. Phys Chem Chem Phys 2018; 20:17458-17463. [DOI: 10.1039/c8cp02603c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Excitation spectroscopy is one of the most suitable methods to classify the aggregation patterns in AIE.
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Affiliation(s)
- So-Yoen Kim
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Jong-Dae Lee
- Department of Chemistry
- College of Natural Sciences
- Chosun University
- Gwangju
- South Korea
| | - Yang-Jin Cho
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Mi Rang Son
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Dae Won Cho
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
- Center for Photovoltaic Materials
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
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36
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Wang C, Cao X, Zhu Y, Xu Z, Gong Q, Zhang L, Zhang L, Zhao S. Interfacial rheological behaviors of inclusion complexes of cyclodextrin and alkanes. SOFT MATTER 2017; 13:8636-8643. [PMID: 29115365 DOI: 10.1039/c7sm02025b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The transformation of cyclodextrins (CDs) and alkanes from separated monomers to inclusion complexes at the interface is illustrated by analyzing the evolution of interfacial tension along with the variation of interfacial area for an oscillating drop. Amphiphilic intermediates are formed by threading one CD molecule on one alkane molecule at the oil/aqueous interface. After that, the amphiphilic intermediates transform into non-amphiphilic supramolecules which further assemble through hydrogen bonding at the oil/aqueous interface to generate a rigid network. With the accumulation of supramolecules at the interface, microcrystals are formed at the interface. The supramolecules of dodecane@2α-CD grow into microrods which form an unconsolidated shell and gradually cover the drop. However, the microcrystals of dodecane@2β-CD are significantly smaller which fabricate into skin-like films at the interface. The amphiphilic intermediates during the transformation increase the feasibility of self-emulsification and the skin-like films enhance the stability of the emulsion. With these unique properties, CDs can be promising for application in hydrophobic drug delivery, food industry and enhanced oil recovery.
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Affiliation(s)
- Ce Wang
- School of Food and Chemical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China
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37
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Saha S, Roy A, Roy MN. Mechanistic Investigation of Inclusion Complexes of a Sulfa Drug with α- and β-Cyclodextrins. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02619] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Subhadeep Saha
- Department of Chemistry, University of North Bengal, Darjeeling-734013, India
| | - Aditi Roy
- Department of Chemistry, University of North Bengal, Darjeeling-734013, India
| | - Mahendra Nath Roy
- Department of Chemistry, University of North Bengal, Darjeeling-734013, India
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38
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White LJ, Wells NJ, Blackholly LR, Shepherd HJ, Wilson B, Bustone GP, Runacres TJ, Hiscock JR. Towards quantifying the role of hydrogen bonding within amphiphile self-association and resultant aggregate formation. Chem Sci 2017; 8:7620-7630. [PMID: 29568426 PMCID: PMC5848798 DOI: 10.1039/c7sc03888g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 09/21/2017] [Indexed: 11/30/2022] Open
Abstract
The role of hydrogen bonding within aggregate formation and CMC: can these properties be predicted by low level computational modelling?
Herein, we present a series of five tetrabutylammonium (TBA) sulfonate–urea amphiphilic salts. In solution these amphiphilic salts have been shown to form a variety of self-associated species. The proportion and type of which are both solvent and concentration dependent. In DMSO-d6 a variety of NMR experiments provide evidence towards the formation of mainly dimeric over larger aggregate species. Increasing the percentage of water was shown to increase the concentration of the larger aggregates over dimers in solution. A correlation was established between critical micelle concentration (CMC) values obtained in a 1 : 19 EtOH : H2O mixture, dimeric self-association constants obtained in a DMSO-d6 – 0.5% H2O and the results of simple semi-empirical PM6 computational modelling methods. This approach begins to quantify the role of hydrogen bonding in amphiphile self-association and the effects it imparts on surfactant properties. This consequently provides preliminary evidence that these properties maybe predicted by simple low level computational modelling techniques.
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Affiliation(s)
- L J White
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - N J Wells
- School of Chemistry , University of Southampton , Southampton , SO17 1BJ , UK
| | - L R Blackholly
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - H J Shepherd
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - B Wilson
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - G P Bustone
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
| | - T J Runacres
- School of Biosciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK
| | - J R Hiscock
- School of Physical Sciences , University of Kent , Park Wood Road , Canterbury , Kent CT2 7NH , UK . ; Tel: +44(0) 1227 823043
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Evidences for complexations of β-cyclodextrin with some amino acids by 1 H NMR, surface tension, volumetric investigations and XRD. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.123] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Roy K, Bomzan P, Roy MC, Roy MN. Inclusion of tyrosine derivatives with α-cyclodextrin in aqueous medium of various pH conditions by surface tension, conductance, UV–Vis and NMR studies. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.12.104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Roy A, Roy MN. Cage to cage study of ionic liquid and cyclic oligosaccharides to form inclusion complexes. RSC Adv 2017. [DOI: 10.1039/c7ra08397a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Encapsulation of trihexyltetradecylphosphonium chloride inside α and β-cyclodextrins in both aqueous solution and solid state with 1 : 1 stoichiometry.
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Affiliation(s)
- Aditi Roy
- Department of Chemistry
- University of North Bengal
- India
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Host-guest interactions between cyclodextrins and surfactants with functional groups at the end of the hydrophobic tail. J Colloid Interface Sci 2016; 491:336-348. [PMID: 28056443 DOI: 10.1016/j.jcis.2016.12.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 12/15/2016] [Accepted: 12/16/2016] [Indexed: 11/23/2022]
Abstract
The aim of this work was to investigate the influence of the incorporation of substituents at the end of the hydrophobic tail on the binding of cationic surfactants to α-, β-, and γ-cyclodextrins. The equilibrium binding constants of the 1:1 inclusion complexes formed follow the trend K1(α-CD)>K1(β-CD)≫K1(γ-CD), which can be explained by considering the influence of the CD cavity volume on the host-guest interactions. From the comparison of the K1 values obtained for dodecyltriethylammonium bromide, DTEAB, to those estimated for the surfactants with the substituents, it was found that the incorporation of a phenoxy group at the end of the hydrocarbon tail does not affect K1, and the inclusion of a naphthoxy group has some influence on the association process, slightly diminishing K1. This makes evident the importance of the contribution of hydrophobic interactions to the binding, the length of the hydrophobic chain being the key factor determining K1. However, the presence of the aromatic rings does influence the location of the host and the guest in the inclusion complexes. The observed NOE interactions between the aromatic protons and the CD protons indicate that the aromatic rings are partially inserted within the host cavity, with the cyclodextrin remaining close to the aromatic rings, which could be partially intercalated in the host cavity. To the authors' knowledge this is the first study on the association of cyclodextrins with monomeric surfactants incorporating substituents at the end of the hydrophobic tail.
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Study to explore the mechanism to form inclusion complexes of β-cyclodextrin with vitamin molecules. Sci Rep 2016; 6:35764. [PMID: 27762346 PMCID: PMC5071908 DOI: 10.1038/srep35764] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 10/05/2016] [Indexed: 12/12/2022] Open
Abstract
Host–guest inclusion complexes of β-cyclodextrin with two vitamins viz., nicotinic acid and ascorbic acid in aqueous medium have been explored by reliable spectroscopic, physicochemical and calorimetric methods as stabilizer, carrier and regulatory releaser of the guest molecules. Job’s plots have been drawn by UV-visible spectroscopy to confirm the 1:1 stoichiometry of the host-guest assembly. Stereo-chemical nature of the inclusion complexes has been explained by 2D NMR spectroscopy. Surface tension and conductivity studies further support the inclusion process. Association constants for the vitamin-β-CD inclusion complexes have been calculated by UV-visible spectroscopy using both Benesi–Hildebrand method and non-linear programme, while the thermodynamic parameters have been estimated with the help of van’t Hoff equation. Isothermal titration calorimetric studies have been performed to determine the stoichiometry, association constant and thermodynamic parameters with high accuracy. The outcomes reveal that there is a drop in ΔSo, which is overcome by higher negative value of ΔHo, making the overall inclusion process thermodynamically favorable. The association constant is found to be higher for ascorbic acid than that for nicotinic acid, which has been explained on the basis of their molecular structures.
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Hernandez-Pascacio J, Piñeiro Á, Ruso JM, Hassan N, Campbell RA, Campos-Terán J, Costas M. Complex Behavior of Aqueous α-Cyclodextrin Solutions. Interfacial Morphologies Resulting from Bulk Aggregation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:6682-6690. [PMID: 27299803 DOI: 10.1021/acs.langmuir.6b01646] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The spontaneous aggregation of α-cyclodextrin (α-CD) molecules in the bulk aqueous solution and the interactions of the resulting aggregates at the liquid/air interface have been studied at 283 K using a battery of techniques: transmission electron microscopy, dynamic light scattering, dynamic surface tensiometry, Brewster angle microscopy, neutron reflectometry, and ellipsometry. We show that α-CD molecules spontaneously form aggregates in the bulk that grow in size with time. These aggregates adsorb to the liquid/air interface with their size in the bulk determining the adsorption rate. The material that reaches the interface coalesces laterally to form two-dimensional domains on the micrometer scale with a layer thickness on the nanometer scale. These processes are affected by the ages of both the bulk and the interface. The interfacial layer formed is not in fast dynamic equilibrium with the subphase as the resulting morphology is locked in a kinetically trapped state. These results reveal a surprising complexity of the parallel physical processes taking place in the bulk and at the interface of what might have seemed initially like a simple system.
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Affiliation(s)
- Jorge Hernandez-Pascacio
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México , México D. F. 04510, Mexico
| | - Ángel Piñeiro
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Juan M Ruso
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Natalia Hassan
- Soft Matter and Molecular Biophysics Group, Department of Applied Physics, University of Santiago de Compostela , Santiago de Compostela 15782, Spain
| | - Richard A Campbell
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156, 38042 Grenoble, Cedex 9, France
| | - José Campos-Terán
- Departamento de Procesos y Tecnología, Universidad Autónoma Metropolitana , Unidad Cuajimalpa, Av. Vasco de Quiroga 4871, Col. Santa Fe, Delegación Cuajimalpa de Morelos 05348, Mexico
| | - Miguel Costas
- Laboratorio de Biofisicoquímica, Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México , México D. F. 04510, Mexico
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Exploration of inclusion complexes of neurotransmitters with β-cyclodextrin by physicochemical techniques. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.05.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Roy MN, Roy A, Saha S. Probing inclusion complexes of cyclodextrins with amino acids by physicochemical approach. Carbohydr Polym 2016; 151:458-466. [PMID: 27474589 DOI: 10.1016/j.carbpol.2016.05.100] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 10/21/2022]
Abstract
Formations of host-guest inclusion complexes of two natural amino acids, viz., l-Leucine and l-Isoleucine as guests with α and β-cyclodextrins have been investigated which include diverse applications in modern science such as controlled delivery in the field of pharmaceuticals, food processing etc. Surface tension and conductivity studies establish the formation of inclusion complexes with 1:1 stoichiometry. The interactions of cyclodextrins with amino acids have been supported by density, viscosity, refractive index, hydration and solvation number measurements indicating higher degree of inclusion in case of α-cyclodextrin. l-Leucine interacts more with the hydrophobic cavity of cyclodextrin than its isomer. With the help of stability constant by NMR titration, hydrophobic effect, H-bonds and structural effects the formations of inclusion complexes have been explained.
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Affiliation(s)
- Mahendra Nath Roy
- Department of Chemistry, University of North Bengal, Darjeeling 734013, India.
| | - Aditi Roy
- Department of Chemistry, University of North Bengal, Darjeeling 734013, India
| | - Subhadeep Saha
- Department of Chemistry, University of North Bengal, Darjeeling 734013, India
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Garrido PF, Brocos P, Amigo A, García-Río L, Gracia-Fadrique J, Piñeiro Á. STAND: Surface Tension for Aggregation Number Determination. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3917-3925. [PMID: 27048988 DOI: 10.1021/acs.langmuir.6b00477] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Taking advantage of the extremely high dependence of surface tension on the concentration of amphiphilic molecules in aqueous solution, a new model based on the double equilibrium between free and aggregated molecules in the liquid phase and between free molecules in the liquid phase and those adsorbed at the air/liquid interface is presented and validated using literature data and fluorescence measurements. A key point of the model is the use of both the Langmuir isotherm and the Gibbs adsorption equation in terms of free molecules instead of the nominal concentration of the solute. The application of the model should be limited to non ionic compounds since it does not consider the presence of counterions. It requires several coupled nonlinear fittings for which we developed a software that is publicly available in our server as a web application. Using this tool, it is straightforward to get the average aggregation number of an amphiphile, the micellization free energy, the adsorption constant, the maximum surface excess (and so the minimum area per molecule), the distribution of solute in the liquid phase between free and aggregate species, and the surface coverage in only a couple of seconds, just by uploading a text file with surface tension vs concentration data and the corresponding uncertainties.
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Affiliation(s)
- Pablo F Garrido
- Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Pilar Brocos
- Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Alfredo Amigo
- Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Luis García-Río
- Departamento de Química Física, Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS), Facultade de Química, Universidade de Santiago de Compostela , 15782 Santiago de Compostela, Spain
| | - Jesús Gracia-Fadrique
- Departamento de Fisicoquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria , 04510 México D.F., Mexico
| | - Ángel Piñeiro
- Departamento de Física Aplicada, Facultade de Física, Universidade de Santiago de Compostela , 15782 Santiago de Compostela, Spain
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Roy A, Saha S, Datta B, Roy MN. Insertion behavior of imidazolium and pyrrolidinium based ionic liquids into α and β-cyclodextrins: mechanism and factors leading to host–guest inclusion complexes. RSC Adv 2016. [DOI: 10.1039/c6ra19684e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The encapsulation of [BMIm]Cl and [BMP]Cl within α and β-cyclodextrin in both the solid state and aqueous solution with 1 : 1 supramolecular assembly.
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Affiliation(s)
- Aditi Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Subhadeep Saha
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Biswajit Datta
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
| | - Mahendra Nath Roy
- Department of Chemistry
- University of North Bengal
- Darjeeling – 734013
- India
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