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Gerola AP, Wanderlind EH, Idrees M, Sangaletti P, Zaramello L, Nome RA, Silva GTM, Quina FH, Tachiya M, Nome F, Fiedler HD. Anion binding to surfactant aggregates: AuCl4− in cationic, anionic and zwitterionic micelles. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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2
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The centenary of the Stern-Volmer equation of fluorescence quenching: From the single line plot to the SV quenching map. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2020. [DOI: 10.1016/j.jphotochemrev.2019.100338] [Citation(s) in RCA: 118] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Kingsley K, Shevchuk O, Voronov S, Voronov A. Effect of highly hydrophobic plant oil-based monomers on micellization of sodium dodecyl sulfate. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.02.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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4
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Liu Q, Yang X, Xu H, Pan K, Yang Y. Novel nanomicelles originating from hydroxyethyl starch-g-polylactide and their release behavior of docetaxel modulated by the PLA chain length. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.08.012] [Citation(s) in RCA: 11] [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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5
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Tyagi P, Tyagi R. Synthesis, Structural Properties and Applications of Gemini Surfactants: A Review. TENSIDE SURFACT DET 2013. [DOI: 10.3139/113.110045] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Gemini surfactants are most exciting new types of surfactants. They have two hydrophilic head groups and two hydrophobic groups in a molecule separated by a spacer group. Nowadays different types of geminis have been synthesized. Geminis show some characteristic features like low cmc, high surface activity, high solubility in water, good foaming and wetting properties, as well as low Krafft temperature. Geminis imply low eye and skin irritation. These surfactants are widely used as antifoaming and antimicrobial agents. This review paper deals with synthesis, properties and applications of various gemini surfactants.
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6
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Naskar B, Dan A, Ghosh S, Aswal V, Moulik SP. Revisiting the self-aggregation behavior of cetyltrimethylammonium bromide in aqueous sodium salt solution with varied anions. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2012.03.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Duhamel J. New insights in the study of pyrene excimer fluorescence to characterize macromolecules and their supramolecular assemblies in solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6527-6538. [PMID: 22423596 DOI: 10.1021/la2047646] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This report highlights some of the recent developments that have been made in the quantitative analysis of fluorescence decays acquired with pyrene-labeled macromolecules. With these new analytical tools, macromolecules of different composition and architecture can now be labeled in a variety of ways with the pyrene chromophore, and the kinetics of pyrene excimer formation can be described to retrieve quantitative information about the internal dynamics of the macromolecules studied. In particular, this review presents the procedure that was followed to develop these new analytical tools and how the process of pyrene excimer formation with vinyl polymers, poly(L-glutamic acid), dendrimers, associative polymers, surfactants, and lipids labeled with pyrene has been successfully characterized thanks to these analysis programs.
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Affiliation(s)
- Jean Duhamel
- Institute of Polymer Research, Waterloo Institute for Nanotechnology, Department of Chemistry, University of Waterloo , Waterloo ON N2L 3G1, Canada
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8
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Fluorescence study of drug-carrier interactions in CTAB/PBS buffer model systems. J Colloid Interface Sci 2012; 377:251-61. [PMID: 22520209 DOI: 10.1016/j.jcis.2012.03.063] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Revised: 03/21/2012] [Accepted: 03/22/2012] [Indexed: 11/22/2022]
Abstract
The well-known cationic surfactant hexadecyltrimethylammonium bromide (CTAB) was used as a model carrier to study drug-carrier interactions with fluorescence probes (5-hexadecanoylaminofluorescein (HAF) and 2,10-bis-(3-aminopropyloxy)dibenzo[a,j]perylene-8,16-dione (NIR 628) by applying ensemble as well as single molecule fluorescence techniques. The impact of the probes on the micelle parameters (critical micelle concentration, average aggregation number, hydrodynamic radius) was investigated under physiological conditions. In the presence of additional electrolytes, such as buffer, the critical micelle concentration decreased by a factor of about 10. In contrast, no influence of the probes on the critical micelle concentration and on average aggregation number was observed. The results show that HAF does not affect the characteristics of CTAB micelles. Analyzing fluorescence correlation spectroscopy data and time-resolved anisotropy decays in terms of the "two-step" in combination with the "wobbling-in-cone" model, it was proven that HAF and NIR 628 are differently associated with the micelles. Based on ensemble and single molecule fluorescence experiments, intra- and intermicellar energy transfer process between the two dyes were probed and characterized.
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Quintana SS, Falcone RD, Silber JJ, Correa NM. Comparison between Two Anionic Reverse Micelle Interfaces: The Role of Water-Surfactant Interactions in Interfacial Properties. Chemphyschem 2011; 13:115-23. [DOI: 10.1002/cphc.201100638] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 10/21/2011] [Indexed: 11/12/2022]
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10
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Photochemistry of flutamide in various media: Investigation of the reaction mechanism as revealed by external magnetic field effects on product yields. J Photochem Photobiol A Chem 2011. [DOI: 10.1016/j.jphotochem.2011.10.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Anitha N, Balamurugan R, Palaniandavar M. Spectral and electrochemical studies of bis(diimine)copper(II) complexes in anionic, cationic and nonionic micelles. J Colloid Interface Sci 2011; 362:243-52. [PMID: 21807373 DOI: 10.1016/j.jcis.2011.05.075] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2010] [Revised: 05/26/2011] [Accepted: 05/27/2011] [Indexed: 11/26/2022]
Abstract
The spectral and redox behavior of bis(diimine)copper(II) complexes, where diimine is bipyridine, 1,10-phenanthroline, 4-methyl-1,10-phenanthroline, 5-methyl-1,10-phenanthroline, 5-nitro-1,10-phenanthroline, 4,7-dimethyl-1,10-phenanthroline, 5,6-dimethyl-1,10-phenanthroline, 2,9-dimethyl-1,10-phenanthroline, 3,4,7,8-tetramethyl-1,10-phenanthroline and dipyrido-[3,2-d:2',3'-f]-quinoxaline, are significantly different in aqueous and in aqueous SDS, CTAB and Triton X-100 micellar solutions. The (1)H NMR spectral study in aqueous (D(2)O) and aqueous micelles reveals that the Cu(II) complexes interact more strongly with SDS than with CTAB and Triton X-100 micelles and at sites on SDS micelles different from those on the latter. Ligand Field spectral studies reveal that the complexes exist as the dicationic aquated species [Cu(diimine)(2)(H(2)O)(2)](2+), which interacts strongly with the anionic SDS micelles through columbic forces. However, they exist as [Cu(diimine)(2)(H(2)O)Cl](+) and/or [Cu(diimine)(2)H(2)] located in the hydrophobic microenvironments in Triton X-100 and CTAB micelles. The attainment of reversibility of the redox systems in the micellar microenvironments is remarkable and this illustrates that the Cu(II) and Cu(I) species undergo stereochemical changes suitable for reversible electron-transfer. The remarkable differences in spectral and electrochemical properties of Cu(II) complexes in aqueous and aqueous micellar solutions illustrate that the complexes are nestled largely within the micellar environments and imply that the accessibilities of the complexes to electron-transfer are different and are dependent on the nature of micelles as well as the nature and hydrophobicity of the diimine ligands.
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Affiliation(s)
- N Anitha
- Centre for Bioinorganic Chemistry, School of Chemistry, Bharathidasan University, Tiruchirapalli 620 024, India
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12
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Ghosh AK, Samanta A, Bandyopadhyay P. Cu2+-Induced Micellar Charge Selective Fluorescence Response of Acridine Orange: Effect of Micellar Charge, pH, and Mechanism. J Phys Chem B 2011; 115:11823-30. [DOI: 10.1021/jp206644b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Amit K. Ghosh
- Unilever R & D Bangalore, 64 Main Road, Whitefield, Bangalore-560066, India
| | - Avik Samanta
- Unilever R & D Bangalore, 64 Main Road, Whitefield, Bangalore-560066, India
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13
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The aggregation of Tyr-Phe dipeptide and Val-Tyr-Val tripeptide in aqueous solution and in the presence of SDS and PEO–PPO–PEO triblock copolymer: Fluorescence spectroscopic studies. J Colloid Interface Sci 2011; 360:600-5. [DOI: 10.1016/j.jcis.2011.04.058] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 04/13/2011] [Accepted: 04/19/2011] [Indexed: 11/21/2022]
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14
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Chen S, Duhamel J, Bahun GJ, Adronov A. Quantifying the Presence of Unwanted Fluorescent Species in the Study of Pyrene-Labeled Macromolecules. J Phys Chem B 2011; 115:9921-9. [DOI: 10.1021/jp203124a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Shaohua Chen
- Institute for Polymer Research, Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Jean Duhamel
- Institute for Polymer Research, Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Greg J. Bahun
- Department of Chemistry and the Brockhouse Institute for Materials Research, McMaster University, Hamilton, Canada
| | - Alex Adronov
- Department of Chemistry and the Brockhouse Institute for Materials Research, McMaster University, Hamilton, Canada
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15
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Significant effect of polar head group of surfactants on the solubilization of Zein in mixed micellar (SDS–DDAB) media. Colloids Surf B Biointerfaces 2010; 81:74-80. [DOI: 10.1016/j.colsurfb.2010.06.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 06/22/2010] [Accepted: 06/24/2010] [Indexed: 11/23/2022]
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16
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Keyes C, Duhamel J. Electron Transfer between Physically Bound Electron Donors and Acceptors: A Fluorescence Blob Model Approach. J Phys Chem B 2010; 114:13950-60. [DOI: 10.1021/jp105550r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christine Keyes
- Institute for Polymer Research, Department of Chemistry, University of Waterloo, Waterloo, ON
N2L 3G1, Canada
| | - Jean Duhamel
- Institute for Polymer Research, Department of Chemistry, University of Waterloo, Waterloo, ON
N2L 3G1, Canada
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17
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Yang YJ, Engberts JBFN. Fluorescence spectroscopic study of the formation of hydrophobic microdomains in aqueous solutions of poly(alkylmethyldiallylammonium bromides). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19911100906] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Martens FM, Verhoeven JW. Photo-induced electron transfer from NADH and other 1,4-dihydronicotinamides to methyl viologen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19811000605] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Mackay RA, Grätzel M. The Photoreduction of Thionine and Surfactant Thionine by Iron(II) in Anionic Micelles and Microemulsions. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19850890513] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Matsuo T, Aso Y, Kano K. Energy Transfer in Micellar Systems. Fluorescence Investigation of Energy Transfer from Dialkylalloxazine to Dye Cations in the Presence of Anionic Micelles. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19800840207] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Sahoo SK, Baral M. Dioxotetraamines derived molecular and supramolecular devices. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2009. [DOI: 10.1016/j.jphotochemrev.2008.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Boens N, Novikov E, Van der Auweraer M. Compartmental analysis in photophysics: Kinetics and identifiability of models for quenching of fluorescent probes in micelles. Math Biosci 2007; 209:624-43. [PMID: 17537464 DOI: 10.1016/j.mbs.2007.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Revised: 04/20/2007] [Accepted: 04/20/2007] [Indexed: 11/25/2022]
Abstract
The parameters describing the kinetics of excited-state processes can possibly be recovered by analysis of the fluorescence decay surface measured as a function of the experimental variables. The identifiability analysis of a photophysical model assuming errorless time-resolved fluorescence data can verify whether the model parameters can be determined. In this work, we have used the methods of similarity transformation and Taylor series to investigate the identifiability of two models utilized to describe the time-resolved fluorescence quenching of stationary probes in micelles. The first model assumes that exchange of the quencher between micelles is much slower than the fluorescence decay of the unquenched probe (the 'immobile' quencher model). The second model assumes that quenchers exchange between the aqueous and micellar phases (the 'mobile' quencher model). For the 'immobile' quencher model, the rate constants for deactivation (k(0)) and quenching (k(q)) of the excited probe are uniquely identified together with the average number of quencher molecules per micelle. For the 'mobile' quencher model, the rate constants k(0) and k(q) are uniquely identified, as are the rate constants for entry (k(+)) and exit (k(-)) of one quencher molecule into and from a micelle, and the micellar aggregation number. The concomitant rate equations describing the time-resolved fluorescence are solved using z-transforms.
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Affiliation(s)
- Noël Boens
- Department of Chemistry and Institute for Nanoscale Physics and Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200f - bus 02404, 3001 Heverlee, Belgium.
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23
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English RJ, Ratcliffe I, Blanchard RL, Parsons BJ. Effect of Polydispersity on Fluorescence Quenching in Micelles Formed by Telechelic Associative Polymers. Macromolecules 2007. [DOI: 10.1021/ma0624649] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert J. English
- Centre for Water-Soluble Polymers, The North East Wales Institute of Higher Education, Wrexham, LL11 2AW, UK, and Faculty of Health, Leeds Metropolitan University, Leeds, LS1 3HE, UK
| | - Ian Ratcliffe
- Centre for Water-Soluble Polymers, The North East Wales Institute of Higher Education, Wrexham, LL11 2AW, UK, and Faculty of Health, Leeds Metropolitan University, Leeds, LS1 3HE, UK
| | - Rowan-Louise Blanchard
- Centre for Water-Soluble Polymers, The North East Wales Institute of Higher Education, Wrexham, LL11 2AW, UK, and Faculty of Health, Leeds Metropolitan University, Leeds, LS1 3HE, UK
| | - Barry J. Parsons
- Centre for Water-Soluble Polymers, The North East Wales Institute of Higher Education, Wrexham, LL11 2AW, UK, and Faculty of Health, Leeds Metropolitan University, Leeds, LS1 3HE, UK
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24
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Bhat S, Maitra U. Low molecular mass cationic gelators derived from deoxycholic acid: remarkable gelation of aqueous solvents. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.03.118] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Chandrasekar K, Baskar G. Cholesterol Mesogen Containing Water-Soluble Copolymers: Design and Organization Behavior at Different Interfaces. Biomacromolecules 2007; 8:1665-75. [PMID: 17425367 DOI: 10.1021/bm061235r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cholesterol mesogen containing monomer, cholesteryl acrylamido butyrate (CAB) with the novel spacer group drawn from 4-amino butyric acid has been demonstrated to exhibit good reactivity with 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) to yield copolymers with CAB content as high as 15 mol % hitherto not achieved. The spacer group is shown to provide the twin benefits of enhanced reactivity and solubility in water. The high pK(a) at > or =9.90 of these copolymers estimated from potentiometric studies demonstrates packing of AMPS segments as ionic clusters. The higher CAB in copolymer C provides the most densely packed nonpolar microdomains. From fluorescence quenching studies, the cross-linking provided by the cholesterol chains favoring intra- or intermolecular aggregated structures has been established. At the air/solution interface, copolymer C exhibits the most close-packed structures exhibiting "a" of 41.2 A(2)/molecule. The effect of neutralization on the adsorption characteristics is investigated.
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Affiliation(s)
- K Chandrasekar
- Industrial Chemistry Laboratory, Central Leather Research Institute, Adyar, Chennai 600020, India
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26
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Spectroscopic Investigations on the Interaction of Crystal Violet with Nonionic Micelles of Brij and Igepal Surfactants in Aqueous Media. J SOLUTION CHEM 2007. [DOI: 10.1007/s10953-007-9133-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Temperature dependence of pyrene fluorescence spectra in aqueous solutions of CnEm (C14E7, C16E7, and C16E6) nonionic surfactant micelles. J Photochem Photobiol A Chem 2006. [DOI: 10.1016/j.jphotochem.2006.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Wattebled L, Laschewsky A, Moussa A, Habib-Jiwan JL. Aggregation numbers of cationic oligomeric surfactants: a time-resolved fluorescence quenching study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:2551-7. [PMID: 16519454 DOI: 10.1021/la052414h] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The micelle aggregation numbers (N(agg)) of several series of cationic oligomeric surfactants were determined by time-resolved fluorescence quenching (TRFQ) experiments, using advantageously 9,10-dimethylanthracene as fluorophore. The study comprises six dimeric ("gemini"), three trimeric, and two tetrameric surfactants, which are quaternary ammonium chlorides, with medium length spacer groups (C(3)-C(6)) separating the individual surfactant fragments. Two standard cationic surfactants served as references. The number of hydrophobic chains making up a micellar core is relatively low for the oligomeric surfactants, the spacer length playing an important role. For the dimers, the number decreases from 32 to 21 with increasing spacer length. These numbers decrease further with increasing degree of oligomerization down to values of about 15. As for many conventional ionic surfactants, the micelles of all oligomers studied grow only slightly with the concentration, and they remain in the regime of small micelles up to concentrations of at least 3 wt %.
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Affiliation(s)
- Laurent Wattebled
- Universität Potsdam, Institut für Chemie, Karl-Liebknecht-Str.25, D-14476 Potsdam-Golm, Germany
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Relógio P, Martinho JMG, Farinha JPS. Effect of Surfactant on the Intra- and Intermolecular Association of Hydrophobically Modified Poly(N,N-dimethylacrylamide). Macromolecules 2005. [DOI: 10.1021/ma051701p] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paula Relógio
- Centro de Química-Física Molecular, Instituto Superior Técnico, 1049−001 Lisboa, Portugal
| | - J. M. G. Martinho
- Centro de Química-Física Molecular, Instituto Superior Técnico, 1049−001 Lisboa, Portugal
| | - J. P. S. Farinha
- Centro de Química-Física Molecular, Instituto Superior Técnico, 1049−001 Lisboa, Portugal
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31
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Nandi S, Ghosh SK, Bhattacharya SC. Distribution of quencher ions in ternary system of Igepal/water/carbon tetrachloride at different water pool concentration: A spectroscopic study. Colloids Surf A Physicochem Eng Asp 2005. [DOI: 10.1016/j.colsurfa.2005.06.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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32
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Zingaretti L, Mariano Correa N, Boscatto L, Chiacchiera SM, Durantini EN, Bertolotti SG, Rivarola CR, Silber JJ. Distribution of amines in water/AOT/n-hexane reverse micelles: influence of the amine chemical structure. J Colloid Interface Sci 2005; 286:245-52. [PMID: 15848423 DOI: 10.1016/j.jcis.2004.12.057] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Accepted: 12/20/2004] [Indexed: 10/25/2022]
Abstract
The distribution of different aliphatic and aromatic amines: n-butylamine (n-BA), isobutylamine (i-BA), tert-butylamine (t-BA), piperidine (PIP), N,N-dimethylaniline (DMA) and N-methylaniline (MA) in water/sodium 1,4-bis(2-ethylhexyl)sulfosuccinate(AOT)/n-hexane reverse micelles was investigated by steady-state fluorescence measurements. The partition constants were measured by an indirect method based on the effect that amine partitioning exert on the bimolecular rate of the reaction between a microphase incorporated fluorophore (Ru(bpy)2+(3)) and the quencher, (Fe(CN)3-(6)). For MA, that can act as a quencher of the fluorophore a direct method was used. The results show that primary amines have larger partition constants than the secondary ones. For tertiary amines the distribution constants were practically negligible. Laser flash photolysis experiments confirmed that tertiary amines, both aliphatic and aromatic, are not incorporated to the micellar pseudophase. The effect of the amine structure on the partition constant was analyzed through linear solvation free energy relationships (LSER) using solute parameters and compared with those obtained for alcohols. Hydrogen bond interactions with the AOT polar heads appear to be the main driving force for the distribution of amines between the organic and micellar pseudophases, whereas the size of the alkyl or aromatic group tends to hinder it.
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Affiliation(s)
- Lilian Zingaretti
- Departamento de Química, Universidad Nacional de Río Cuarto, Agencia Postal No. 3, 5800 Río Cuarto, Argentina
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33
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Pastoriza Gallego MJ, Bravo-Diaz C, Gonzalez-Romero E. Fluorimetric determination of structural parameters of BuOH/SDS/H2O reverse micelles. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.08.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Boßmann S, Seiler M, Dürr H. Supramolecular sensitizer-relay assemblies. An evaluation of binding constants from non-linear stern-volmer plots. J PHYS ORG CHEM 2004. [DOI: 10.1002/poc.610050202] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Associated structures of aqueous solution of comblike polymers from 2-acrylamido-2-methyl-1-propanesulfonic acid, dodecylmethacrylate and poly(ethyleneglycol) acrylate macromonomer. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.07.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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36
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Krishnan RSG, Thennarasu S, Mandal AB. Self-Assembling Characteristics of A New Nonionic Gemini Surfactant. J Phys Chem B 2004. [DOI: 10.1021/jp037554j] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Sathiah Thennarasu
- Chemical Laboratory and Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-600020, India
| | - Asit Baran Mandal
- Chemical Laboratory and Organic Chemistry Division, Central Leather Research Institute, Adyar, Chennai-600020, India
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37
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De S, Girigoswami A. Fluorescence resonance energy transfer—a spectroscopic probe for organized surfactant media. J Colloid Interface Sci 2004; 271:485-95. [PMID: 14972626 DOI: 10.1016/j.jcis.2003.10.021] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2003] [Accepted: 10/22/2003] [Indexed: 11/21/2022]
Abstract
Dyes commonly used as biological labels have been used to probe resonance energy transfer in organized media. In neat water, energy transfer between the dye pairs fluorescein (donor):Nile red (acceptor) and acridine orange (donor):Nile red (acceptor) has a very low probability of occurrence. This study shows that the rate constant of energy transfer increases by more than an order of magnitude in organized surfactant media, viz., micelles and reverse micelles of the surfactant Triton X-100. The reverse micelles provide a better medium for energy transfer than the micelles. The energy transfer studies also provide an idea about the location and proximity of donor and acceptor dyes within the various organized media. Assuming Poissonian statistics for dye distribution, the donor-acceptor distances within micelles and reverse micelles are determined from energy transfer parameters. Acridine orange has been found to function better as a donor than fluorescein. This may be due to steric and electrostatic factors.
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Affiliation(s)
- Swati De
- Department of Chemistry, University of Kalyani, Kalyani, Nadia, 741235 West Bengal, India.
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38
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Fernandez YD, Gramatges AP, Amendola V, Foti F, Mangano C, Pallavicini P, Patroni S. Using micelles for a new approach to fluorescent sensors for metal cations. Chem Commun (Camb) 2004:1650-1. [PMID: 15263962 DOI: 10.1039/b404543b] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach based on self-assembly inside micelles has been individuated to prepare a system behaving as a water-operating selective fluorescent sensor for Cu2+ and Ni2+.
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Affiliation(s)
- Yuri Diaz Fernandez
- Instituto Superior de Tecnologias y Ciencias Aplicadas, Ave. Salvador Allende y Luaces, Quinta de los Molinos, La Habana, Cuba.
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39
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Aggregation of Non Ionic Surfactant Igepal in Aqueous Solution: Fluorescence and Light Scattering Studies. Int J Mol Sci 2003. [DOI: 10.3390/i4110562] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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40
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de Oliveira HP, Gehlen MH. Electronic energy transfer between fluorescent dyes with inter- and intramicellar interactions. Chem Phys 2003. [DOI: 10.1016/s0301-0104(03)00117-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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41
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Yusa SI, Sakakibara A, Yamamoto T, Morishima Y. Fluorescence Studies of pH-Responsive Unimolecular Micelles Formed from Amphiphilic Polysulfonates Possessing Long-Chain Alkyl Carboxyl Pendants. Macromolecules 2002. [DOI: 10.1021/ma0212947] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shin-ichi Yusa
- Department of Applied Chemistry, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan, and Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akihisa Sakakibara
- Department of Applied Chemistry, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan, and Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Tohei Yamamoto
- Department of Applied Chemistry, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan, and Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yotaro Morishima
- Department of Applied Chemistry, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan, and Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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42
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Yoshida N, Moroi Y, Humphry-Baker R, Grätzel M. Dynamics for Solubilization of Naphthalene and Pyrene into n-Decyltrimethylammonium Perfluorocarboxylate Micelles. J Phys Chem A 2002. [DOI: 10.1021/jp0138072] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Nobuyuki Yoshida
- Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University-Ropponmatsu, Fukuoka 810-8560, Japan, and Institut de Chimie Physique II, Ecole Polytechnique Federal de Lausanne, CH-1015, Lausanne, Switzerland
| | - Yoshikiyo Moroi
- Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University-Ropponmatsu, Fukuoka 810-8560, Japan, and Institut de Chimie Physique II, Ecole Polytechnique Federal de Lausanne, CH-1015, Lausanne, Switzerland
| | - Robin Humphry-Baker
- Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University-Ropponmatsu, Fukuoka 810-8560, Japan, and Institut de Chimie Physique II, Ecole Polytechnique Federal de Lausanne, CH-1015, Lausanne, Switzerland
| | - Michael Grätzel
- Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University-Ropponmatsu, Fukuoka 810-8560, Japan, and Institut de Chimie Physique II, Ecole Polytechnique Federal de Lausanne, CH-1015, Lausanne, Switzerland
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43
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Abstract
This article presents studies on the photophysical and photochemical behavior of probes within micellar systems: organized emulsifier/polymer aggregates; the intra- and interpolymer association of amphiphilic polymers; monomer-swollen micelles (microdroplets); and the interfacial layer. Pyrene (Py) as a probe is particularly attractive because of its ability to measure the polarity of its microenvironment. Dipyme yields information on the microviscosity of micellar systems. Probes such as laurdan and prodan can be used to explore the surface characteristics of micelles or microdroplets. The dansyl group has a special photophysical property that gives information about the local polarity and mobility (viscosity) of the microenvironment. The organized association of amphiphilic polymer and emulsifier introduces a heterogeneity in the local concentration of the reactants. This heterogeneity also results from the attractive interaction between hydrophilic monomer and emulsifier in the case when the monomer carries a positive charge and the counterpart a negative one, and vice versa. Some emulsifiers can bind to the amphiphilic copolymers by simple partitioning between the aqueous phase and the polymer--non-cooperative association. The interaction between micelles (microdroplets) and charged polymers leads to the formation of mixed micelles. Binding emulsifiers to these polymers was detected at emulsifier concentrations much below the critical micellar concentration (CMC). Emulsifiers often interact cooperatively with polymers at the critical aggregation concentration (CAC) below the CMC, forming micelle-like aggregates within the polymer. The CAC can be taken as a measure of interaction between the emulsifier and polymer. A decrease in the monomer fluorescence intensity of probe-labeled polymer results from increased excimer formation, or higher aggregates within the unimolecular polymeric micelles. An increase in the monomer fluorescence intensity of probe-labeled polymer within the micellar system can be ascribed to shielding of the probe chromophores by emulsifier micelles. The quenching of probe emission by (un)charged hydrophilic monomer depends on partitioning of the monomer between the aqueous phase and the micelles. Penetration of reactants into the interfacial layer determines the quenching of the hydrophobic probe by hydrophilic quencher, or vice versa. Quenching depends on the thickness, density and charge of the interfacial layer. Compartmentalization prevents the carbonyl compound and unsaturated monomer from coming into sufficiently close contact to allow singlet or triplet-monomer interaction. All negatively charged carbonyl probe molecules are quenched with significantly lower rates than the parent neutral hydrophobic benzophenone molecules, which were located further inside the aggregates. This results from the different conformation and allocation of reactants within the micellar system. In the reverse micelles, quenching depends on the amount of water in the interfacial layer and the total area of the water/oil interface.
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Affiliation(s)
- Ignac Capek
- Polymer Institute, Slovak Academy of Sciences, Bratislava
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44
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Joseph Milton Gaspar L, Baskar G, Baran Mandal A. Solution structure of a modified comb-like polymer from octadecyl methacrylate and acrylic acid. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(01)01100-9] [Citation(s) in RCA: 7] [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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45
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Correa NM, Durantini EN, Silber JJ. Substituent Effects on Binding Constants of Carotenoids to n-Heptane/AOT Reverse Micelles. J Colloid Interface Sci 2001; 240:573-580. [PMID: 11482968 DOI: 10.1006/jcis.2001.7640] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The absorption spectra of 6'-apo-beta-caroten-6'-ol (1), 6'-apo-beta-caroten-6'-oic acid (2), and ethyl 6'-apo-beta-caroten-6'-oate (3) were analyzed in homogeneous media and in reversed micelles of AOT (sodium 1,4-bis(2-ethylhexyl) sulfosuccinate) in n-heptane. The possible solute-solvent interactions of these compounds were analyzed in pure solvents by Taft and Kamlet's solvatochromic comparison method. These carotenoids show sensitivity similar to that of medium polarity-polarizability as measured by pi*. Moreover, the absorption spectra of carotenoid 3 and to much less extent carotenoid 2 display broadening of the visible bands induced by polar solvents characteristic of carotenoids that contain a carbonyl functional group in conjugation with the carbon-carbon pi-electron system. They are also sensitive to the ability of the solvent to accept protons in a hydrogen bond interaction measured by beta. This sensitivity follows the expected order: 2>1>3. In the reverse micellar system, while the spectra for 3 remain unchanged, the intensity of the absorption band characteristic of n-heptane for 1 and 2 decreases as the AOT concentration increases, and a new band develops. This new band is attributed to the solute bound to the micelle interface. These changes allowed us to determine the binding constant (K(b)) between these compounds and AOT. At W(0)=[H(2)O]/[AOT]=0 the values of K(b) of 326+/-5 and 6.2+/-0.3 were found for the acid 2 and the alcohol 1, respectively. The strength of binding is interpreted considering their hydrogen-bond donor ability and the solubility in the organic pseudophase. For 1 K(b) decreases as W(0) is increased, while for 2 no variation was observed. These effects are discussed in terms of carotenoid-water competition for interfacial binding sites. Copyright 2001 Academic Press.
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Affiliation(s)
- N. Mariano Correa
- Departamento de Química y Física, Universidad Nacional de Río Cuarto, Agencia Postal Nro. 3, Río Cuarto, 5800, Argentina
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46
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Li M, Rharbi Y, Winnik MA, Hahn KG. Aggregation Behavior of Nonionic Surfactants Synperonic A7 and A50 in Aqueous Solution. J Colloid Interface Sci 2001; 240:284-293. [PMID: 11446812 DOI: 10.1006/jcis.2001.7625] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aggregation behavior of Synperonic A7 and A50, fatty alcohol ethoxylate nonionic surfactants (C(m)E(n)) with mean polyoxyethylene chain lengths of 7 and 50, respectively, was investigated in aqueous solution by means of surface tension, laser light scattering, steady-state fluorescence, and fluorescence quenching experiments. Surface tension measurements at room temperature indicate that the critical micelle concentration of A7 is 0.1 g/L (0.22 mM) and that of A50 is 0.17 g/L (0.07 mM). Static light scattering measurements reveal that the averaged aggregation number of A7 in water is 417 and that of A50 is 23. When solutions of A7 were allowed to age over a period of months at room temperature, the micelle M(w) and hydrodynamic radius increased. The aggregation numbers found from fluorescence quenching measurements, using excimer formation from 1-ethylpyrene as a probe, were about 300 for freshly prepared solutions of A7 and about 40 for A50. We also found that the presence of air has a strong effect on the data obtained from the fluorescence quenching measurements. Copyright 2001 Academic Press.
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Affiliation(s)
- Mei Li
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada
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47
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Sato Y, Hashidzume A, Morishima Y. Self-Association in Water of Copolymers of Acrylic Acid and N-Dodecylmethacrylamide As Studied by Fluorescence, Dynamic Light Scattering, and Rheological Techniques. Macromolecules 2001. [DOI: 10.1021/ma010446f] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yoshiko Sato
- Department of Macromolecular Science, Graduate School of Science,Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science,Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yotaro Morishima
- Department of Macromolecular Science, Graduate School of Science,Osaka University, Toyonaka, Osaka 560-0043, Japan
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48
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Okamoto K, Hirota N, Tominaga T, Terazima M. Translational Diffusion of Ion Radicals Created by Electron Transfer in Charged Micellar Solutions Probed by the Transient Grating Method and the Taylor Dispersion Method. J Phys Chem A 2001. [DOI: 10.1021/jp004536i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Koichi Okamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan, and Department of Applied Chemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama, 700−0005, Japan
| | - Noboru Hirota
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan, and Department of Applied Chemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama, 700−0005, Japan
| | - Toshihiro Tominaga
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan, and Department of Applied Chemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama, 700−0005, Japan
| | - Masahide Terazima
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, 606-8502 Japan, and Department of Applied Chemistry, Okayama University of Science, 1-1 Ridai-cho, Okayama, 700−0005, Japan
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49
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Noda T, Hashidzume A, Morishima Y. Effects of Spacer Length on the Side-Chain Micellization in Random Copolymers of Sodium 2-(Acrylamido)-2-methylpropanesulfonate and Methacrylates Substituted with Ethylene Oxide-Based Surfactant Moieties. Macromolecules 2001. [DOI: 10.1021/ma0017283] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tetsuya Noda
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yotaro Morishima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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50
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Noda T, Hashidzume A, Morishima Y. Micelle Formation of Random Copolymers of Sodium 2-(Acrylamido)-2-methylpropanesulfonate and a Nonionic Surfactant Macromonomer in Water As Studied by Fluorescence and Dynamic Light Scattering. Macromolecules 2000. [DOI: 10.1021/ma991680x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tetsuya Noda
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akihito Hashidzume
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Yotaro Morishima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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