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Shen Y, Xiao Y, Edkins RM, Youngs TGA, Hughes TL, Tellam J, Edkins K. Elucidating the hydrotropism behaviour of aqueous caffeine and sodium benzoate solution through NMR and neutron total scattering analysis. Int J Pharm 2023; 647:123520. [PMID: 37858637 DOI: 10.1016/j.ijpharm.2023.123520] [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: 06/01/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
Hydrotropism is a convenient way to increase the solubility of drugs by up to several orders of magnitude, and even though it has been researched for decades with both experimental and simulation methods, its mechanism is still unknown. Here, we use caffeine/sodium benzoate (CAF-SB) as model system to explore the behaviour of caffeine solubility enhancement in water through NMR spectroscopy and neutron total scattering. 1H NMR shows strong interaction between caffeine and sodium benzoate in water. Neutron total scattering combined with empirical potential structure refinement, a systematic method to study the solution structure, reveals π-stacking between caffeine and the benzoate anion as well as Coulombic interactions with the sodium cation. The strongest hydrogen bond interaction in the system is between benzoate and water, which help dissolve CAF-SB complex and increase the solubility of CAF in water. Besides, the stronger interaction between CAF and water and the distortion of water structure are further mechanisms of the CAF solubility enhancement. It is likely that the variety of mechanisms for hydrotropism shown in this system can be found for other hydrotropes, and NMR spectroscopy and neutron total scattering can be used as complementary techniques to generate a holistic picture of hydrotropic solutions.
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Affiliation(s)
- Yichun Shen
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - Yitian Xiao
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK
| | - Robert M Edkins
- Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building, 295, Cathedral Street, Glasgow, G1 1XL, UK
| | - Tristan G A Youngs
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - Terri-Louise Hughes
- ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - James Tellam
- ISIS Deuteration Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - Katharina Edkins
- School of Health Sciences, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PT, UK.
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2
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Shen Y, Cruz-Cabeza AJ, Azzouz O, Edkins K. Using Prenucleation Aggregation of Caffeine-Benzoic Acid as a Rapid Indication of Co-crystallization from Solutions. Mol Pharm 2023; 20:1942-1950. [PMID: 36942815 DOI: 10.1021/acs.molpharmaceut.2c00829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Co-crystal design is a convenient way to remedy the poor biopharmaceutical properties of drugs. Most studies focus on experimental co-crystal screening or computational prediction, but hardly any work has been done toward fast, efficient, and reliable prediction of solution crystallization for co-crystal formation. Here, we study the caffeine-benzoic acid co-crystal system, due to its reported difficulty to crystallize from the solution phase. With this work, we investigate whether there is a link between prenucleation aggregation in solution and co-crystal formation and how to harness this for crystallization prediction. 1H and 13C NMR spectroscopy is used to study the prenucleation interaction between caffeine and benzoic acid in methanol, acetone, and acetonitrile as examples of common solvents. In this system, crystallization from methanol leads to no co-crystallization, from acetone to concomitant crystallization of co-crystal and caffeine, and from acetonitrile to pure co-crystal formation from solution. Strong heteromeric dimers were found to exist in all three solvents. Ternary phase diagrams were defined and a solution-accessible co-crystal region was found for all solvents. For this system, the prenucleation clusters found in solution could be linked to the crystallization of the co-crystal. Crystallization from DMSO did not yield the co-crystal and there were no detectable prenucleation aggregates. NMR spectroscopy to probe dimers in solution can thus be used as a fast, reliable, and promising tool to predict co-crystallization from specific solvents and to screen for suitable solvents for manufacturing and scale-up.
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Affiliation(s)
- Yichun Shen
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
| | | | - Ossama Azzouz
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
| | - Katharina Edkins
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
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3
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Abstract
Double-encapsulated microcapsules (DEMs) were prepared and effectively adsorbed onto the cotton fabric surfaces during impregnation without crosslinking agents to obtain functional cotton fabrics. Specifically, Fourier transform infrared spectrometer (FTIR) and confocal laser scanning microscope (CLSM) showed two different molecules (lavender essence and dye indigo) were encapsulated into the microcapsules simultaneously, with loading capacity of 10% and 9.73%, respectively. The spherical shape of DEMs was confirmed by transmission electron microscopy (TEM), confocal laser scanning microscope (CLSM) and average particle sizes were about 617 nm, as measured by dynamic light scattering (DLS). According to the results of IR and X-ray photoelectron spectroscopy (XPS) experiments, DEMs was combined with cotton fabrics by hydrogen bond. The superior thermal stability of microcapsules and functional cotton fabrics was also demonstrated. The adsorption behavior and mechanism of microparticles onto cotton fabrics were further examined by chemical property characterization in combination with adsorption kinetic model. The kinetic adsorption process included three stages: fast adsorption, slow adsorption rate, and adsorption equilibrium. Finally, the good color fastness of the functional cotton fabrics was demonstrated by the tests of rubbing and accelerated laundering. Herein, this study will be beneficial to the development of functional cotton fabrics-based materials.
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4
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Dos Santos Silva Araújo L, Lazzara G, Chiappisi L. Cyclodextrin/surfactant inclusion complexes: An integrated view of their thermodynamic and structural properties. Adv Colloid Interface Sci 2021; 289:102375. [PMID: 33592397 DOI: 10.1016/j.cis.2021.102375] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 12/14/2022]
Abstract
Cyclodextrins (CDs) play an important role in self-assembly systems of amphiphiles. The structure of CDs provides distinguished physicochemical properties, including the ability to form host-guest complexes. The complexation affects the properties of guest molecules and can produce supramolecular aggregates with desirable characteristics for fundamental and practical applications. Surfactants are particularly attractive host molecules due to their wide variety, availability, responsiveness to different stimuli, and high relevance in different fields, e.g. medical, cosmetic, pharmaceutical, and food industries. The tendency of organization in higher-order supramolecular aggregates arises the interest in applying such versatile complexes in the development of novel materials. In this review, we provide a comprehensive overview of the thermodynamics aspects of surfactants and CDs inclusion complexes formation in aqueous environment, emphasizing the assessment of the interactions, thermodynamic driving forces, and structural aspects. Also, the most common analytical techniques used to gather deep insight into the aspects of CDs complexes are discussed and the perspectives for the surfactant-cyclodextrin complexes are pointed out.
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Affiliation(s)
- Larissa Dos Santos Silva Araújo
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy; Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France
| | - Giuseppe Lazzara
- Dipartimento di Fisica e Chimica, Università degli Studi di Palermo, Viale delle Scienze pad 17, 90128 Palermo, Italy.
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin, 71 avenue des Martyrs, 38042 Grenoble, France.
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5
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Poloxamine/D-α-Tocopheryl polyethylene glycol succinate (TPGS) mixed micelles and gels: Morphology, loading capacity and skin drug permeability. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114930] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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6
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Recent advances in assemblies of cyclodextrins and amphiphiles: construction and regulation. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2019.11.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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7
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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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8
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Synthesis of Novel Ethoxylated Quaternary Ammonium Gemini Surfactants for Enhanced Oil Recovery Application. ENERGIES 2019. [DOI: 10.3390/en12091731] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two aspects are always considered in the design and development of new surfactants for oilfield application. One of them is that surfactant must be sufficiently stable at reservoir temperature and the other is the solubility of the surfactant in the injection water (usually seawater) and the formation brine. Most industrially applied surfactants undergo hydrolysis at elevated temperature and the presence of reservoir ions causes surfactant precipitation. In relevance to this, a novel series of quaternary ammonium gemini surfactants with different length of spacer group (C8, C10, and C12) was synthesized and characterized using FT-IR, 13C NMR, 1H NMR, and MALDI-TOF MS. The gemini surfactants were prepared by solvent-free amidation of glycolic acid ethoxylate lauryl ether with 3-(dimethylamino)-1-propylamine followed by reaction with dibromoalkane to obtain quaternary ammonium gemini surfactants. The gemini surfactants were examined by means of surface properties and thermal stabilities. The synthesized gemini surfactants showed excellent solubility in the formation brine, seawater, and deionized water without any precipitation for up to three months at 90 °C. Thermal gravimetric data revealed that all the gemini surfactants were decomposed above 227 °C, which is higher than the oilfield temperature (≥90 °C). The decrease in critical micelle concentration (CMC) and surface tension at CMC (γcmc) was detected by enhancing spacer length in the order C8 ˃ C10 ˃ C12 which suggested that the larger the spacer, the better the surface properties. Moreover, a further decrease in CMC and γcmc was noticed by enhancing temperature (30 °C ˃ 60 °C) and salinity (deionized water ˃ seawater). The current study provides a comprehensive investigation of quaternary ammonium gemini surfactants that can be further extended potentially to use as a suitable material for oilfield application.
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10
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Influence of the cyclodextrin nature on the decompaction of dimeric cationic surfactant-DNA complexes. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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11
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Mannoside and 1,2-mannobioside β-cyclodextrin-scaffolded NO-photodonors for targeting antibiotic resistant bacteria. Carbohydr Polym 2018; 199:649-660. [PMID: 30143173 DOI: 10.1016/j.carbpol.2018.07.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/21/2018] [Accepted: 07/06/2018] [Indexed: 12/26/2022]
Abstract
Two β-cyclodextrin derivatives randomly appended on the primary face with both the nitric oxide (NO) photodonor 4-nitro-3-(trifluoromethyl)aniline and a mannose or α(1→2)mannobioside residue are reported to construct targeted NO photoreleasing nanocarriers. 2D ROESY and PGSE NMR suggested supramolecular homodimerization in water by inclusion of the nitroaniline group into the facing macrocycle cavities. Isothermal titration calorimetry on their concanavalin A lectin binding showed an exothermic binding event to the lectin and an endothermic process during the dilution of the conjugates. Both α(1→2)mannobioside and the nitroaniline moieties significantly enhanced the binding to the lectin. These effects might arise from a better fit within the carbohydrate-recognition site in the former case and a multivalent effect caused by homodimerization in the latter. Direct detection of NO by amperometric technique shows that both β-cyclodextrin derivatives release this radical upon excitation with visible light with higher efficiency than the unfunctionalized NO photodonor.
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12
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Synthesis,characterization of 1-butyl-4-methylpyridinium lauryl sulfate and its inclusion phenomenon with β-cyclodextrin for enhanced applications. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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13
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Banjare MK, Behera K, Satnami ML, Pandey S, Ghosh KK. Host–guest complexation of ionic liquid with α- and β-cyclodextrins: a comparative study by 1H-NMR, 13C-NMR and COSY. NEW J CHEM 2018. [DOI: 10.1039/c8nj01840e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The inclusion complexation of 1-butyl-3-methylimidazolium octylsulphate [Bmim][OS] with host α- and β-cyclodextrins (CDs) has been explored by 1H NMR, 13C NMR and COSY methods. The insertion of a guest molecule into the cavity of CD is clearly reflected by changes in 1H-NMR and 13C-NMR chemical shift values and COSY NMR suggest that both H-bonding and electrostatic interactions involved to the complexation.
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Affiliation(s)
- Manoj Kumar Banjare
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur (C.G.)
- India
| | | | - Manmohan L. Satnami
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur (C.G.)
- India
| | - Siddharth Pandey
- Department of Chemistry
- Indian Institute of Technology Delhi
- India
| | - Kallol K. Ghosh
- School of Studies in Chemistry
- Pt. Ravishankar Shukla University
- Raipur (C.G.)
- India
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14
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Poorghorban M, Karoyo AH, Grochulski P, Verrall RE, Wilson LD, Badea I. A 1H NMR Study of Host/Guest Supramolecular Complexes of a Curcumin Analogue with β-Cyclodextrin and a β-Cyclodextrin-Conjugated Gemini Surfactant. Mol Pharm 2015; 12:2993-3006. [DOI: 10.1021/acs.molpharmaceut.5b00261] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Masoomeh Poorghorban
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
| | - Abdalla H. Karoyo
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Pawel Grochulski
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
- Canadian Light Source, Saskatoon, Saskatchewan, S7N 2 V3, Canada
| | - Ronald E. Verrall
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Lee D. Wilson
- Department
of Chemistry, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5C9, Canada
| | - Ildiko Badea
- Drug
Discovery and Development Research Group, College of Pharmacy and
Nutrition, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E5, Canada
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15
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Valente AJM, Carvalho RA, Söderman O. Do Cyclodextrins Aggregate in Water? Insights from NMR Experiments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6314-6320. [PMID: 26017565 DOI: 10.1021/acs.langmuir.5b01493] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One decade ago Bonini et al. [Langmuir 2006, 22, 1478-1484] reported the occurrence of aggregates of β-cyclodextrin in aqueous solutions with sizes in the range from 90 nm to a few micrometers. The experimental technique used was cryo-TEM. This work followed a number of previous studies involving other physical parameters, such as viscosities and activity coefficients, the results of which were interpreted in terms of self-aggregation of cyclodextrins. Since then, the ability of cyclodextrins to self-assemble were often used to explain and rationalize the supramolecular mechanisms involving cyclodextrins. Here, the question of aggregation of native cyclodextrins (α-, β-, and γ-) in aqueous solutions is addressed by using (1)H NMR techniques, including NMR diffusometry, relaxometry, and proton peak intensities. Within the detection limit of the NMR experiments, no aggregates of cyclodextrin were observed. If aggregates are present, the fraction of cyclodextrin in aggregates is quite small-less than 1%. However, we cannot exclude the presence of transient clusters involving several cyclodextrin molecules where the lifetime of the cluster is short.
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Affiliation(s)
| | | | - Olle Söderman
- §Division of Physical Chemistry, Department of Chemistry, Lund University, PO Box 124, S-221 00 Lund, Sweden
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16
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Wang G, Kang Y, Tang B, Zhang X. Tuning the surface activity of gemini amphiphile by the host-guest interaction of cucurbit[7]uril. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:120-124. [PMID: 25489870 DOI: 10.1021/la504410q] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This research is aimed to develop an effective supramolecular route for tuning the surface activity of the surfactant. To this end, cationic gemini amphiphiles and cucurbit[7]uril (CB[7]) were complexed in water, and each hydrophobic chain of the gemini amphiphiles was bound with a CB[7]. The steric hindrance of CB[7] prevented the two hydrophobic chains from getting closed to each other, leading a significant change of surface activity. Before supramolecular complexation, the surface activity of the gemini amphiphile is relatively high, which can generate the foams easily. However, the foam generated by gemini amphiphile can be destructed by adding CB[7], suggesting that the suface activity is lowed after the supramolecular complexation. The surface activity can recover after adding 1-adamantanamine hydrochloride, which has a stronger ability to bind CB[7]. Therefore, a controllable foaming and defoaming process can be realized. It is highly anticipated that supramolecular chemistry for tuning amphiphilicity of surfactants may find application in the fields that fast foaming and defoaming are needed.
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Affiliation(s)
- Guangtong Wang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, China
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17
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Poorghorban M, Das U, Alaidi O, Chitanda JM, Michel D, Dimmock J, Verrall R, Grochulski P, Badea I. Characterization of the host-guest complex of a curcumin analog with β-cyclodextrin and β-cyclodextrin-gemini surfactant and evaluation of its anticancer activity. Int J Nanomedicine 2015; 10:503-15. [PMID: 25609956 PMCID: PMC4298337 DOI: 10.2147/ijn.s70828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Curcumin analogs, including the novel compound NC 2067, are potent cytotoxic agents that suffer from poor solubility, and hence, low bioavailability. Cyclodextrin-based carriers can be used to encapsulate such agents. In order to understand the interaction between the two molecules, the physicochemical properties of the host–guest complexes of NC 2067 with β-cyclodextrin (CD) or β-cyclodextrin–gemini surfactant (CDgemini surfactant) were investigated for the first time. Moreover, possible supramolecular structures were examined in order to aid the development of new drug delivery systems. Furthermore, the in vitro anticancer activity of the complex of NC 2067 with CDgemini surfactant nanoparticles was demonstrated in the A375 melanoma cell line. Methods Physicochemical properties of the complexes formed of NC 2067 with CD or CDgemini surfactant were investigated by synchrotron-based powder X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Synchrotron-based small- and wide-angle X-ray scattering and size measurements were employed to assess the supramolecular morphology of the complex formed by NC 2067 with CDgemini surfactant. Lastly, the in vitro cell toxicity of the formulations toward A375 melanoma cells at various drug-to-carrier mole ratios were measured by cell viability assay. Results Physical mixtures of NC 2067 and CD or CDgemini surfactant showed characteristics of the individual components, whereas the complex of NC 2067 and CD or CDgemini surfactant presented new structural features, supporting the formation of the host–guest complexes. Complexes of NC 2067 with CDgemini surfactants formed nanoparticles having sizes of 100–200 nm. NC 2067 retained its anticancer activity in the complex with CDgemini surfactant for different drug-to-carrier mole ratios, with an IC50 (half-maximal inhibitory concentration) value comparable to that for NC 2067 without the carrier. Conclusion The formation of host–guest complexes of NC 2067 with CD or CDgemini surfactant has been confirmed and hence the CDgemini surfactant shows good potential to be used as a delivery system for anticancer agents.
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Affiliation(s)
- Masoomeh Poorghorban
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Umashankar Das
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Osama Alaidi
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jackson M Chitanda
- Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Deborah Michel
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Jonathan Dimmock
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
| | - Ronald Verrall
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK, Canada
| | - Pawel Grochulski
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada ; Canadian Light Source, Saskatoon, SK, Canada
| | - Ildiko Badea
- Drug Discovery and Development Research Group, College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, Canada
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18
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Ferrazza R, Rossi B, Guella G. DOSY-NMR and Raman Investigations on the Self-Aggregation and Cyclodextrin Complexation of Vanillin. J Phys Chem B 2014; 118:7147-55. [DOI: 10.1021/jp504406j] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ruggero Ferrazza
- Department
of Physics, University of Trento, Via Sommarive 14, 38123 Povo (Trento), Italy
| | - Barbara Rossi
- Department
of Physics, University of Trento, Via Sommarive 14, 38123 Povo (Trento), Italy
| | - Graziano Guella
- Department
of Physics, University of Trento, Via Sommarive 14, 38123 Povo (Trento), Italy
- Biophysical
Institute, CNR, Via alla Cascata
56/C, 38123 Povo (Trento), Italy
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19
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Manouilidou MD, Lazarou YG, Mavridis IM, Yannakopoulou K. Staudinger ligation towards cyclodextrin dimers in aqueous/organic media. Synthesis, conformations and guest-encapsulation ability. Beilstein J Org Chem 2014; 10:774-83. [PMID: 24778732 PMCID: PMC3999877 DOI: 10.3762/bjoc.10.73] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 03/10/2014] [Indexed: 01/07/2023] Open
Abstract
β-Cyclodextrin (β-CD) dimers have been prepared using the bioorthogonal Staudinger ligation for the first time. In addition to a known linker, methyl 2-(diphenylphosphanyl)terephthalate, a doubly active linker was specifically developed that enabled connection of two β-CD units in a single step and in aqueous/organic media, under mild conditions and with good yields. A three-carbon spacer between the β-CD torus and the azido group was required for facile dimer formation. The products, as studied by NMR spectroscopy, were found to adopt closed conformations by intramolecular self-inclusion. On the other hand, association via intermolecular binding was also observed in aqueous solution, confirmed by DOSY NMR experiments. Despite self-inclusion, the β-CD cavities were capable of guest encapsulation, as shown by titration experiments: the binding constant with 1-adamantylamine was similar to that of natural β-CD. Theoretical calculations for isolated molecules (PM3 level of theory) and in the presence of solvent [water, PM3(COSMO)] as well as DFT calculations suggested that the compounds prefer to adopt conformations which bring the phenyl groups either inside the β-CD cavity (inclusion) or over its narrow side (vicinal). Thus, Staudinger ligation could be the method of choice for linking CDs exhibiting (i) ease of preparation in aqueous media, in short steps, under mild conditions and in good yields, (ii) satisfactory aqueous solubility and independent binding capacity of the cavities.
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Affiliation(s)
- Malamatenia D Manouilidou
- Institute of Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, National Center for Scientific Research "Demokritos", Terma Patriarchou Gregoriou & Neapoleos, Aghia Paraskevi Attikis, 15310 Greece. Tel. +30210 6503796
| | - Yannis G Lazarou
- Institute of Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, National Center for Scientific Research "Demokritos", Terma Patriarchou Gregoriou & Neapoleos, Aghia Paraskevi Attikis, 15310 Greece. Tel. +30210 6503796
| | - Irene M Mavridis
- Institute of Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, National Center for Scientific Research "Demokritos", Terma Patriarchou Gregoriou & Neapoleos, Aghia Paraskevi Attikis, 15310 Greece. Tel. +30210 6503796
| | - Konstantina Yannakopoulou
- Institute of Advanced Materials, Physicochemical Processes, Nanotechnology & Microsystems, National Center for Scientific Research "Demokritos", Terma Patriarchou Gregoriou & Neapoleos, Aghia Paraskevi Attikis, 15310 Greece. Tel. +30210 6503796
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20
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Valente AJM, Söderman O. The formation of host-guest complexes between surfactants and cyclodextrins. Adv Colloid Interface Sci 2014; 205:156-76. [PMID: 24011696 DOI: 10.1016/j.cis.2013.08.001] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 08/01/2013] [Accepted: 08/01/2013] [Indexed: 11/15/2022]
Abstract
Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature. In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude. This will also be critically reviewed.
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Affiliation(s)
- Artur J M Valente
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.
| | - Olle Söderman
- Division of Physical Chemistry, Center for Chemistry and Chemical Engineering, Lund University, Lund, Sweden
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Paul BK, Ray D, Ganguly A, Guchhait N. Modulation in prototropism of the photosensitizer Harmane by host:guest interactions between β-cyclodextrin and surfactants. J Colloid Interface Sci 2013; 411:230-9. [PMID: 24060109 DOI: 10.1016/j.jcis.2013.08.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 08/01/2013] [Accepted: 08/02/2013] [Indexed: 11/25/2022]
Abstract
The present contribution demonstrates the photophysics of a prospective cancer cell photosensitizer Harmane (HM) belonging to the family of β-carboline in mixed microheterogeneous environments of β-cyclodextrin (β-CD) and surfactants having varying surface charges using steady-state and time-resolved fluorescence spectroscopic techniques. The remarkable modulations in prototropic activities of the micelle-bound drug in the presence of β-CD evinces for disruption of the micellar structural integrity by β-CD. The results are meticulously discussed in relevance to the effect of a potential drug delivery vehicle (CD) on the membrane-mimetic micellar system. Further, application of an extrinsic fluorescence probe for monitoring such interactions is fraught by the possibilities of no less than three equilibria that can operate simultaneously viz., (i) surfactant-cyclodextrin, (ii) surfactant-fluorophore and (iii) cyclodextrin-fluorophore. This aspect highlights the enormous importance of the issue of suitability of the fluorescence probe to study such complicated systems and interaction phenomena. Also the varying interaction scenario of β-CD with the nature of the surfactant highlights the importance of precise knowledge of the strength and locus of drug binding in delineating such complex interactions. The results of the present investigation advocate for the potential applicability of the drug (HM) itself as a fluorescence reporter in study of such complex microheterogeneous interactions.
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Affiliation(s)
- Bijan K Paul
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Calcutta 700 009, India
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Lopez-Lopez M, Montilla F, Olivares M, Lebron JA, Moya ML, Lopez-Cornejo P. Interaction between monomers of two surfactants derived from the [Ru(2,2'-bpy)(3)](2+) complex and α, β and γ-cyclodextrins: formation of [2]- and [3]-pseudorotaxanes. Dalton Trans 2013; 42:6171-81. [PMID: 23525374 DOI: 10.1039/c3dt32197e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new surfactants derived from the tris(2,2'-bipyridine) ruthenium(II) complex, [Ru(2,2'-bpy)(3)](2+), were synthesized and characterized: the double-tailed [Ru(2,2'-bipy)2(4,4'-(C(11)H(23))(2)-2,2'-bipy)](2+) surfactant (RuC11) and the mono-tailed [Ru(2,2'-bipy)(2)(4-(CH(3))-4'-(C(13)H(27))-2,2'-bipy)](2+) surfactant (RuC13). The main characteristic of these species is the presence of an inorganic complex as the polar head of the surfactant with interesting luminescence properties, which were used to study the interaction of these cationic surfactants with α-, β- and γ-cyclodextrins (CD). The results showed the formation of [2]- and [3]-pseudorotaxanes. The binding constant values as well as the stoichiometry of the complexes formed were obtained; the results were confirmed, from a qualitative point of view, with NMR spectra.
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Affiliation(s)
- M Lopez-Lopez
- Departamento de Ingeniería Química, Química Física y Química, Orgánica, Universidad de Huelva, Campus El Carmen, Facultad de Ciencias Experimentales, E-21071, Spain
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Domínguez R, Rodríguez A, Maestre A, Robina I, Moyá ML. Synthesis and physicochemical characterization of alkanedyil-α-ω-bis(dimethyldodecylammonium) bromide, 12-s-12,2Br−, surfactants with s=7, 9, 11 in aqueous medium. J Colloid Interface Sci 2012; 386:228-39. [DOI: 10.1016/j.jcis.2012.06.089] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 06/26/2012] [Accepted: 06/27/2012] [Indexed: 10/28/2022]
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24
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Gao H, Shi L, Zhang S, Li J, Wang X, Zheng L. Aggregation behavior of imidazolium-based chiral surfactant in aqueous solution. Colloid Polym Sci 2012. [DOI: 10.1007/s00396-012-2830-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Martín VI, Rodríguez A, del Mar Graciani M, Moyá ML. Binary mixtures with novel monomeric and dimeric surfactants: influence of the head group nature and number of hydrophobic chains on non-ideality. J Colloid Interface Sci 2012; 368:326-35. [PMID: 22041194 DOI: 10.1016/j.jcis.2011.09.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 09/22/2011] [Accepted: 09/23/2011] [Indexed: 10/16/2022]
Abstract
The micellization and micellar growth in the mixtures of N,N-dimethyl, N-phenyl,N-dodecylammonium bromide, PH12, N,N-dimethyl,N-ciclohexylmethyl,N-dodecylammonium bromide, CH12, and their two dimeric counterparts m-dimethylphenyl-α-ω-bis(dodecyldimethylammonium) bromide, 12PH12, and m-dimethylciclohexyl-α-ω-bis(dodecyldimethylammonium) bromide, 12CH12, with dodecyltrimethylammoniumbromide, DTAB, and with N-decanoyl N-methylglucamide, MEGA10, were investigated at 303 K. Circular dichroism, CD, experiments showed the formation of mixed micelles. Two-dimensional, 2D, rotating frame nuclear Overhauser effect spectroscopy (ROESY) experiments indicated that the arrangement of the rings in the pure and mixed micelles is similar, with the rings bent into the micelle interior avoiding contact with water. Application of different theoretical approaches shows that PH12 and CH12 mixtures with DTAB and with MEGA10 behave almost ideally. The binary systems of 12PH12 and 12CH12 with DTAB and with MEGA10 show a non-ideal behavior. An increment in the solution mole fraction of MEGA10 and DTAB diminishes the tendency of the micellar aggregates to grow.
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Affiliation(s)
- Victoria Isabel Martín
- Departamento de Química Física, Universidad de Sevilla, C/Profesor García González 1, 41012 Sevilla, Spain
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Interactions between β-cyclodextrin and an amino acid-based anionic gemini surfactant derived from cysteine. J Colloid Interface Sci 2012; 367:286-92. [DOI: 10.1016/j.jcis.2011.07.101] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2011] [Revised: 07/23/2011] [Accepted: 07/25/2011] [Indexed: 11/24/2022]
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Gómez-Graña S, Hubert F, Testard F, Guerrero-Martínez A, Grillo I, Liz-Marzán LM, Spalla O. Surfactant (bi)layers on gold nanorods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1453-1459. [PMID: 22165910 DOI: 10.1021/la203451p] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Gold nanorods in aqueous solution are generally surrounded by surfactants or capping agents. This is crucial for anisotropic growth during synthesis and for their final stability in solution. When CTAB is used, a bilayer has been evidenced from analytical methods even though no direct morphological characterization of the precise thickness and compactness has been reported. The type of surfactant layer is also relevant to understand the marked difference in further self-assembling properties of gold nanorods as experienced using 16-EO(1)-16 gemini surfactant instead of CTAB. To obtain a direct measure of the thickness of the surfactant layer on gold nanorods synthesized by the seeded growth method, we coupled TEM, SAXS, and SANS experiments for the two different cases, CTAB and gemini 16-EO(1)-16. Despite the strong residual signal from micelles in excess, it can be concluded that the thickness is imposed by the chain length of the surfactant and corresponds to a bilayer with partial interdigitation.
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Jiang L, Yan Y, Huang J. Versatility of cyclodextrins in self-assembly systems of amphiphiles. Adv Colloid Interface Sci 2011; 169:13-25. [PMID: 21839422 DOI: 10.1016/j.cis.2011.07.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 07/14/2011] [Accepted: 07/16/2011] [Indexed: 11/25/2022]
Abstract
Recently, cyclodextrins (CDs) were found to play important yet complicated (or even apparently opposite sometimes) roles in self-assembly systems of amphiphiles or surfactants. Herein, we try to review and clarify the versatility of CDs in surfactant assembly systems by 1) classifying the roles played by CDs into two groups (modulator and building unit) and four subgroups (destructive and constructive modulators, amphiphilic and unamphiphilic building units), 2) comparing these subgroups, and 3) analyzing mechanisms. As a modulator, although CDs by themselves do not participate into the final surfactant aggregates, they can greatly affect the aggregates in two ways. In most cases CDs will destroy the aggregates by depleting surfactant molecules from the aggregates (destructive), or in certain cases CDs can promote the aggregates to grow by selectively removing the less-aggregatable surfactant molecules from the aggregates (constructive). As an amphiphilic building unit, CDs can be chemically (by chemical bonds) or physically (by host-guest interaction) attached to a hydrophobic moiety, and the resultant compounds act as classic amphiphiles. As an unamphiphilic building unit, CD/surfactant complexes or even CDs on their own can assemble into aggregates in an unconventional, unamphiphilic manner driven by CD-CD H-bonds. Moreover, special emphasis is put on two recently appeared aspects: the constructive modulator and unamphiphilic building unit.
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Martín VI, Rodríguez A, Graciani MDM, Robina I, Carmona A, Moyá ML. Physicochemical characterization of bromide mono- and dimeric surfactants with phenyl and cyclohexyl rings in the head group. J Colloid Interface Sci 2011; 363:284-94. [DOI: 10.1016/j.jcis.2011.06.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 06/16/2011] [Accepted: 06/17/2011] [Indexed: 11/28/2022]
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Balomenou I, Kaloudi-Chantzea A, Karakostas N, Yannakopoulou K, Mavridis IM, Pistolis G. Controlling the stereospecificity of a volume-conserving adiabatic photoisomerization within a nanotubular self-assembled cage: a reversible light-heat torque converter. J Phys Chem B 2011; 115:10665-81. [PMID: 21812460 DOI: 10.1021/jp2037608] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present herein a host-guest supramolecular system by which we were able to obtain precise control of the stereospecificity of a new and unusual adiabatic photoisomerization reaction capable of restoring reversibly the original configuration. The host-guest system is composed of (a) a naphthalene ring linked centrosymmetrically-via sp(2) hybridized oxygen atoms-with methoxytriethyleneglycol chains (1) and (b) a nanotubular cage formed by four self-assembled face-to-face β-cyclodextrins threaded onto the long "axle" of 1. The compound 1 can exist in distinct cis,cis, cis,trans, and trans,trans conformations that are spectrally distinguishable (see Scheme 1 ). Spectroscopic and kinetic manifestations of the torsional isomerization of 1 in the lowest excited singlet state both in solution and within the tubular cage were investigated. The results provide clear evidence that the compact cavity completely blocks the photoisomerization pathway manifested in common solution (cis,cis* → cis,trans*), allowing observation of stereospecific, volume-conserving turning of the naphthalene ring about the two "quasidouble" bonds C(Naph)-O by φ ≈ 180° (cis,cis* → trans,trans*). The photoisomerization is purely adiabatic, and the encaged molecule restores its original configuration by generating torque thermally, when relaxing to the ground state.
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Affiliation(s)
- Ioanna Balomenou
- NCSR Demokritos Institute of Physical Chemistry, 153 10 Athens, Greece
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Casas-Solvas JM, Quesada-Soriano I, Carreño-Gázquez D, Giménez-Martínez JJ, García-Fuentes L, Vargas-Berenguel A. β-Cyclodextrin dimers linked through their secondary faces with rigid spacer arms as hosts for bile salts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:9729-9737. [PMID: 21702438 DOI: 10.1021/la201180u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A convenient synthesis of β-cyclodextrin dimers in which the two cyclodextrin units are linked by rigid tethers of relatively short length through their secondary sides is reported. Compounds hexa-2,4-diynediyl- and 1,4-phenylenediethyne-briged β-cyclodextrin dimers are obtained in good yields from mono-2-O-propargyl-β-cyclodextrin through Pd-mediated oxidative homo- and heterocoupling reactions. Isothermal titration calorimetry and NMR spectroscopy (PGSE and 2D-ROESY) are used to determine the thermodynamic parameters (K, ΔH, and TΔS°) for the complexation of such β-cyclodextrin dimers with sodium cholate, deoxycholate, and chenodeoxycholate as well as to estimate the size of the supramolecular structures. The binding of bile salts is enhanced relative to that of native β-cyclodextrin. Although chenodeoxycholate salt binds in a 1:1 fashion, cholate and deoxycholate salts bind in a 1:2 sequential mode.
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Affiliation(s)
- Juan M Casas-Solvas
- Área de Química Orgánica, Universidad de Almería, Carretera de Sacramento, 04120, Almería, Spain
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Yan Y, Jiang L, Huang J. Unveil the potential function of CD in surfactant systems. Phys Chem Chem Phys 2011; 13:9074-82. [DOI: 10.1039/c0cp02651d] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Carvalho RA, Correia HA, Valente AJM, Söderman O, Nilsson M. The effect of the head-group spacer length of 12-s-12 gemini surfactants in the host-guest association with β-cyclodextrin. J Colloid Interface Sci 2010; 354:725-32. [PMID: 21144532 DOI: 10.1016/j.jcis.2010.11.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 11/10/2010] [Accepted: 11/11/2010] [Indexed: 11/19/2022]
Abstract
NMR spectroscopy has been used to study and characterize the interactions in solution between β-CD and alkyl-α,ω-bis(dodecyldimethyl ammonium bromide) gemini surfactants with the following head-group spacer lengths: 2, 4, 6, 8, and 10. The application of the method of continuous variation gives as a result that 1:1 and 2:1 (β-cyclodextrin-gemini) complexes are formed; the association stoichiometry is dependent on the spacer chain length, varying from 1.5 (for s=2) to 1.8 (for s=10). Assuming a two-step mechanism, the binding constants have been computed. In general, the overall binding constant slightly increases with an increase of the number of methylene groups in the spacer. The (1)H NMR spectra of the N-(CH(3))(2) groups in β-cyclodextrin/gemini mixed solutions are split into two peaks for 12-10-12, suggesting that the gemini spacer can thread the β-cyclodextrin so that the latter is positioned between the gemini head-groups. Inspection of the ROESY spectra allowed the establishment of several spatial proximities between the protons from the β-CD and the gemini and for a spacer length of 10, the data indeed indicate that complexes are formed with the CD molecule positioned between the two charged head groups with the spacer passing through the CD molecule.
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Affiliation(s)
- R A Carvalho
- Department of Life Sciences and Center of Neurosciences, University of Coimbra, 3001-401 Coimbra, Portugal
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35
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Carbó-Argibay E, Rodríguez-González B, Gómez-Graña S, Guerrero-Martínez A, Pastoriza-Santos I, Pérez-Juste J, Liz-Marzán LM. The Crystalline Structure of Gold Nanorods Revisited: Evidence for Higher-Index Lateral Facets. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201004910] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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The Crystalline Structure of Gold Nanorods Revisited: Evidence for Higher-Index Lateral Facets. Angew Chem Int Ed Engl 2010; 49:9397-400. [DOI: 10.1002/anie.201004910] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Mechanism of Gemini Disulfide Detergent Mediated Oxidative Refolding of Lysozyme in a New Artificial Chaperone System. Protein J 2010; 29:457-65. [DOI: 10.1007/s10930-010-9279-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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38
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Guerrero-Martínez A, Ávila D, J. Martínez-Casado F, Ripmeester JA, Enright GD, Cola LD, Tardajos G. Solid Crystal Network of Self-Assembled Cyclodextrin and Nonionic Surfactant Pseudorotaxanes. J Phys Chem B 2010; 114:11489-95. [DOI: 10.1021/jp105808j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrés Guerrero-Martínez
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - David Ávila
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Francisco J. Martínez-Casado
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - John A. Ripmeester
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Gary D. Enright
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Luisa De Cola
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
| | - Gloria Tardajos
- Physikalisches Institut, Wesfälische Wilhelms Universität Münster, Mendelstrasse 7, D-48149 Münster, Germany, Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain, and Steacie Institute for Molecular Sciences, National Research Council Canada, Ottawa, Canada
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Wang Q, He R, Cheng X, Lu C. The inclusion complexes between [Zn(dmit)2]2− anion and cyclodextrins: studied by induced circular dichroism spectra and density functional theory calculations. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9834-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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40
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Guerrero-Martínez A, Pérez-Juste J, Carbó-Argibay E, Tardajos G, Liz-Marzán L. Gemini-Surfactant-Directed Self-Assembly of Monodisperse Gold Nanorods into Standing Superlattices. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904118] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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41
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Guerrero-Martínez A, Pérez-Juste J, Carbó-Argibay E, Tardajos G, Liz-Marzán L. Gemini-Surfactant-Directed Self-Assembly of Monodisperse Gold Nanorods into Standing Superlattices. Angew Chem Int Ed Engl 2009; 48:9484-8. [DOI: 10.1002/anie.200904118] [Citation(s) in RCA: 200] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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42
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Oda Y, Matsuda S, Yamanoi T, Murota A, Katsuraya K. Identification of the inclusion complexation between phenyl β-d-(13C6)glucopyranoside and α-cyclodextrin using 2D 1H or 13C DOSY spectrum. Supramol Chem 2009. [DOI: 10.1080/10610270802709345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | | | | | - Akihiko Murota
- b Department of Applied Chemistry , School of Science and Technology, Meiji University , Kanagawa, Japan
| | - Kaname Katsuraya
- c Department of Human Ecology , Wayo Women's University , Chiba, Japan
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Casas-Solvas J, Ortiz-Salmerón E, Fernández I, García-Fuentes L, Santoyo-González F, Vargas-Berenguel A. Ferrocene-β-Cyclodextrin Conjugates: Synthesis, Supramolecular Behavior, and Use as Electrochemical Sensors. Chemistry 2009; 15:8146-62. [DOI: 10.1002/chem.200900593] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rodríguez A, Graciani MDM, Cordobés F, Moyá ML. Water−Ethylene Glycol Cationic Dimeric Micellar Solutions: Aggregation, Micellar Growth, and Characteristics As Reaction Media. J Phys Chem B 2009; 113:7767-79. [DOI: 10.1021/jp901457d] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Felipe Cordobés
- Departamento de Química Física and Departamento de Ingeniería Química, Universidad de Sevilla C/ Profesor García González 1, 41012 Sevilla, SPAIN
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45
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Bendjeriou-Sedjerari A, Derrien G, Charnay C, Zajac J, De Menorval LC, Lindheimer M. Contribution of 1H NMR to the investigation of the adsorption of cationic Gemini surfactants with oligooxyethylene spacer group onto silica. J Colloid Interface Sci 2009; 331:281-7. [DOI: 10.1016/j.jcis.2008.12.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Revised: 11/28/2008] [Accepted: 12/03/2008] [Indexed: 10/21/2022]
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46
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del Mar Graciani M, Rodríguez A, Moyá ML. Study of the reaction between methyl 4-nitrobenzenesulfonate and bromide ions in mixed single-chain-gemini micellar solutions: Kinetic evidence for morphological transitions. J Colloid Interface Sci 2008; 328:324-30. [DOI: 10.1016/j.jcis.2008.09.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Revised: 09/05/2008] [Accepted: 09/06/2008] [Indexed: 11/30/2022]
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47
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Cao M, Deng M, Wang XL, Wang Y. Decompaction of Cationic Gemini Surfactant-Induced DNA Condensates by β-Cyclodextrin or Anionic Surfactant. J Phys Chem B 2008; 112:13648-54. [DOI: 10.1021/jp803244f] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Meiwen Cao
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Manli Deng
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Xiao-Ling Wang
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
| | - Yilin Wang
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, Peopleʼs Republic of China
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48
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Xing H, Lin SS, Yan P, Xiao JX. Demicellization of a mixture of cationic-anionic hydrogenated/fluorinated surfactants through selective inclusion by alpha- and beta-cyclodextrin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10654-10664. [PMID: 18785721 DOI: 10.1021/la8014095] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The interactions between alpha- and beta-cyclodextrin (alpha-/beta-CD) and an equimolar mixture of octyltriethylammonium bromide (OTEAB) and sodium perfluorooctanoate (SPFO) were studied by 1H and 19F NMR, surface tension, conductivity, and dynamic light scattering. It was shown that beta-CD could destroy the mixed micelles of OTEAB-SPFO by selective inclusion of SPFO. As beta-CD was added, the system was observed to undergo a process like this: beta-CD preferentially included SPFO to form 1:1 beta-CD/SPFO complexes. As the inclusion of SPFO was almost saturated, the mixed micelles broke and all OTEAB was released and exposed to aqueous surroundings. Then 1:1 beta-CD/OTEAB and 2:1 beta-CD/SPFO complexes significantly formed simultaneously. Contrary to beta-CD, alpha-CD exhibited selective inclusion to OTEAB and only weak association with SPFO. alpha-CD could also destroy the mixed micelles of OTEAB-SPFO; however, the demicellization ability of alpha-CD is much smaller than that of beta-CD. These conclusions were also well supported by the calculations of binding constants and DeltaG degrees . Different from the complexes of CD/conventional surfactants, the complexes of beta-CD/SPFO or alpha-CD/OTEAB formed by selective inclusion of CD in the mixed cationic-anionic surfactants may have contributed to the surface activity of the aqueous mixtures. The complexes of alpha-CD/OTEAB showed much more significant contribution to the surface activity than that of the complexes of beta-CD/SPFO.
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Affiliation(s)
- Hang Xing
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
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49
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Nilsson M, Valente AJM, Olofsson G, Söderman O, Bonini M. Thermodynamic and Kinetic Characterization of Host−Guest Association between Bolaform Surfactants and α- and β-Cyclodextrins. J Phys Chem B 2008; 112:11310-6. [DOI: 10.1021/jp802963x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Markus Nilsson
- Physical Chemistry 1, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Department of Chemistry and CSGI, University of Florence, 50019 Florence, Italy
| | - Artur J. M. Valente
- Physical Chemistry 1, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Department of Chemistry and CSGI, University of Florence, 50019 Florence, Italy
| | - Gerd Olofsson
- Physical Chemistry 1, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Department of Chemistry and CSGI, University of Florence, 50019 Florence, Italy
| | - Olle Söderman
- Physical Chemistry 1, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Department of Chemistry and CSGI, University of Florence, 50019 Florence, Italy
| | - Massimo Bonini
- Physical Chemistry 1, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, and Department of Chemistry and CSGI, University of Florence, 50019 Florence, Italy
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50
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Aggregation properties of cationic gemini surfactants with dihydroxyethylamino headgroups in aqueous solution. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.04.028] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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