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Sautina NV, Rybakova AI, Blokhin DS, Klochkov VV, Galyametdinov YG. Effect of Intermolecular Interactions in a Water/AOT/Isopropyl Myristate System on the Release of Biologically Active Substances. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421110200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sharifi S, Salavatovna SG, Azarpour A, Rakhshanizadeh F, Zohuri G, Sharifmoghadam MR. Optical Properties of Methyl Orange-Doped Droplet and Photodynamic Therapy of Staphylococcus aureus. J Fluoresc 2019; 29:1331-1341. [PMID: 31713766 DOI: 10.1007/s10895-019-02459-0] [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: 08/06/2019] [Accepted: 10/31/2019] [Indexed: 10/25/2022]
Abstract
Dye-doped droplets are known as mixtures of dyes with uniform solutions of water droplets in a continuous phase of oils with surfactants. To observe the relationship between water droplet structures and surfactant types on optical properties of dyes, a mixture of methyl orange (MO)-doped droplet prepared with benzane and hexane as oils and sodium bis(2-ethylhexyl) sulfosuccinate (AOT) as a surfactant was thus examined using Z-scan instrument, spectrophotometer, and fluorimeter in the present study. The findings revealed that nonlinear refractive (NLR) index, nonlinear absorption (NLA) coefficient, as well as fluorescence intensity of the MO had enhanced following a reduction in the droplet water content induced by changes in the non-centrosymmetric charge density distribution of this pH indicator. Moreover, the MO-doped droplet in a continuous phase of benzene investigated by 1H nuclear magnetic resonance (NMR) spectroscopy indicated that the MO had been located in the droplet in the vicinity of the hydrophilic part of the surfactant. Furthermore, the MO-doped droplets along with laser radiation were employed to perform antibacterial photodynamic therapy (APDT) of Staphylococcus aureus (S. aureus). It was ultimately concluded that the bacteria colony had also extremely diminished in the group treated by the MO-doped droplet.
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Affiliation(s)
- Soheil Sharifi
- Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran.
| | | | - Afshin Azarpour
- Department of Physics, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Forough Rakhshanizadeh
- Department of Pediatrics, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamhossein Zohuri
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, PO Box 91775, Mashhad, Iran
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Photophysical and Nonlinear Optical Properties of Azophloxine in Reverse Micelles. J Fluoresc 2018; 28:1439-1450. [DOI: 10.1007/s10895-018-2319-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 10/14/2018] [Indexed: 11/27/2022]
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Mills AJ, Britton MM. NMR study of the influence of n-alkanol co-surfactants on reverse micelles in quaternary microemulsions of cetyltrimethylammonium bromide (CTAB). MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:425-432. [PMID: 26857914 DOI: 10.1002/mrc.4392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 10/23/2015] [Accepted: 11/03/2015] [Indexed: 06/05/2023]
Abstract
The effects of different n-alkanol co-surfactants on the size, shape, composition and dynamics of reverse micelles (RMs) in cetyltrimethylammonium bromide (CTAB)/n-alkanol/n-hexane/water and CTAB/n-alkanol/n-pentane/water microemulsions were investigated using T2 relaxation and pulsed gradient stimulated echo nuclear magnetic resonance (NMR) measurements and molecular modelling. NMR T2 relaxation times and diffusion coefficients were determined for the surfactant and co-surfactant in these CTAB quaternary reverse microemulsions, for a range of medium chain length alcohol co-surfactants, from 1-butanol to 1-heptanol. These data revealed a slight RM size dependency on co-surfactant chain length, with RM sizes tending to decrease with increasing alcohol chain length. Molecular modelling of CTAB/n-alkanol/n-hexane/water RMs suggested a variation in RM shape with co-surfactant chain length, where those formed with pentanol were found to be least spherical and those formed with heptanol the most spherical. The NMR data also revealed differences in the behaviour of the micellar structures in the CTAB/n-pentanol/n-hexane/water reverse microemulsion, compared with the other reverse microemulsions in this study, where CTAB was found to be distributed between two environments, which then combined to form larger micelles. The origins of these differences remain unclear. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Amanda J Mills
- School of Chemistry, University of Birmingham, Birmingham, UK
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Mills AJ, Wilkie J, Britton MM. NMR and Molecular Dynamics Study of the Size, Shape, and Composition of Reverse Micelles in a Cetyltrimethylammonium Bromide (CTAB)/n-Hexane/Pentanol/Water Microemulsion. J Phys Chem B 2014; 118:10767-75. [DOI: 10.1021/jp504585k] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Amanda J. Mills
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - John Wilkie
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - Melanie M. Britton
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
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Lemons BG, Richens DT, Anderson A, Sedgwick M, Crans DC, Johnson MD. Stabilization of a vanadium(v)–catechol complex by compartmentalization and reduced solvation inside reverse micelles. NEW J CHEM 2013. [DOI: 10.1039/c2nj40524e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Law SJ, Britton MM. Sizing of reverse micelles in microemulsions using NMR measurements of diffusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:11699-11706. [PMID: 22794150 DOI: 10.1021/la300796u] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper reports the size of reverse micelles (RMs) in AOT/octane/H(2)O and CTAB/hexanol/H(2)O microemulsions using magnetic resonance (MR) pulsed field gradient (PFG) measurements of diffusion. Diffusion data were measured using the pulsed gradient stimulated echo (PGSTE) experiment for surfactant molecules residing in the RM interface. Inverse Laplace transformation of these data generated diffusion coefficients for the RMs, which were converted into hydrodynamic radii using the Stokes-Einstein relation. This technique is complementary to those previously used to size RMs, such as dynamic light scattering (DLS) and small-angle X-ray scattering (SAXS), but also offers several advantages, which are discussed. RM sizes, determined using the PGSTE method, in the AOT (sodium bis(2-ethylhexyl) sulfosuccinate) and CTAB (cetyltrimethylammonium bromide) microemulsions were compared with previous DLS and SAXS data, showing good agreement. Methods for determining number distributions from the PGSTE data, through the use of scaling factors, were investigated.
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Affiliation(s)
- Susan J Law
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
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Sedgwick M, Cole RL, Rithner CD, Crans DC, Levinger NE. Correlating Proton Transfer Dynamics To Probe Location in Confined Environments. J Am Chem Soc 2012; 134:11904-7. [DOI: 10.1021/ja304529v] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Myles Sedgwick
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United
States
| | - Richard L. Cole
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United
States
| | - Christopher D. Rithner
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United
States
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United
States
| | - Nancy E. Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United
States
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Johnson MD, Lorenz BB, Wilkins PC, Lemons BG, Baruah B, Lamborn N, Stahla M, Chatterjee PB, Richens DT, Crans DC. Switching Off Electron Transfer Reactions in Confined Media: Reduction of [Co(dipic)2]− and [Co(edta)]− by Hexacyanoferrate(II). Inorg Chem 2012; 51:2757-65. [DOI: 10.1021/ic201247v] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael D. Johnson
- Department
of Chemistry and
Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Bret B. Lorenz
- Department
of Chemistry and
Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Patricia C. Wilkins
- Department
of Chemistry and
Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Brant G. Lemons
- Department
of Chemistry and
Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Bharat Baruah
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
| | - Nathan Lamborn
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
| | - Michelle Stahla
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
| | - Pabitra B. Chatterjee
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
| | - David T. Richens
- Department
of Chemistry and
Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003-8001, United States
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872,
United States
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