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Petek A, Krajnc M, Petek A. Study of host–guest interaction between ß-cyclodextrin and alkyltrimethylammonium bromides in water. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0656-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Fernández I, Pérez-Juste J, Hervés P. Cationic Mixed Micelles as Reaction Medium for Hydrolysis Reactions. J SOLUTION CHEM 2015. [DOI: 10.1007/s10953-015-0383-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Abstract
Surfactants are self-assembled compounds that depend on their structure and electric charge can interact as monomer or micelle with other compounds (substrates). These interactions which may catalyze or inhibit the reaction rates are studied with pseudophase, cooperativity, and stoichiometric (classical) models. In this review, we discuss applying these models to study surfactant-substrate interactions and their effects on Diels-Alder, redox, photochemical, decomposition, enzymatic, isomerization, ligand exchange, radical, and nucleophilic reactions.
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4
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Guest controlled aggregation of amphiphilic sulfonatomethylated calix[4]resorcinarenes in aqueous solutions. J Colloid Interface Sci 2012; 370:19-26. [DOI: 10.1016/j.jcis.2011.12.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 12/27/2011] [Accepted: 12/28/2011] [Indexed: 11/21/2022]
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5
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Astray G, Cid A, Manso JA, Mejuto JC, Moldes OA, Morales J. Alkaline Fading of Triarylmethyl Carbocations in Self-Assembly Microheterogeneous Media. PROGRESS IN REACTION KINETICS AND MECHANISM 2011. [DOI: 10.3184/146867811x12984793755693] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This review reports on the alkaline fading of crystal violet and other related carbocations in the presence of different microheterogeneous media (micelles, microemulsions and vesicles).
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Affiliation(s)
- G. Astray
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
| | - A. Cid
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
| | - J. A. Manso
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
| | - J. C. Mejuto
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
| | - O. A. Moldes
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
| | - J. Morales
- Physical Chemistry Department, Faculty of Science, University of Vigo at Ourense,32004-Ourense, Spain
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6
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Astray G, Cid A, García-Río L, Lodeiro C, Mejuto J, Moldes O, Morales J. Cyclodextrin-Surfactant Mixed Systems as Reaction Media. PROGRESS IN REACTION KINETICS AND MECHANISM 2010. [DOI: 10.3184/146867810x12686717520194] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In recent years our reseach group has investigated the chemical behaviour of β-cyclodextrin (CD)/surfactant mixed systems and their characteristics as reaction media. The results have been interpreted in terms of a pseudophase model that takes into account the formation of both CD-surfactant and CD-substrate complexes and also, in some cases, the exchange of X- and OH- ions between the micellar and aqueous pseudophases. from the experimental results it was concluded that the presence of CD has no effect on existing micelles but raises the critical micellar concentration (cmc). on the other hand, at surfactant concentrations above the cmc, competition between the micellisation and complexation processes leads to the existence of a significant concentration of free CD in equilibrium with the micellar aggregates. The percentage of uncomplexed β-CD in equilibrium with the micellar system increases on increasing the hydrophobicity of the surfactant molecule. This behaviour was justified taking into account the existence of two simultaneous processes: complexation of surfactant monomers by CD and the process of self-assembly to form micellar aggregates. The autoaggregation of surfactant monomers is more important than the complexation process in this mixed system. Varying the hydrophobicity of the surfactant monomer enabled us to determine that the percentages of uncomplexed CD in equilibrium with the micellar system were in the range of 5-95%. When the surfactant self-assembly structure is a vesicle, the free CD in the CD/surfactant mixed system yields a percentage of 100%.
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Affiliation(s)
- G. Astray
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
| | - A. Cid
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
| | - L. García-Río
- Department of Physical Chemistry, Faculty of Chemistry, Univeristy of Santiago, Santiago de Compostela, Spain
| | - C. Lodeiro
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
| | - J.C. Mejuto
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
| | - O. Moldes
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
| | - J. Morales
- Department of Physical Chemistry, Faculty of Science, University of Vigo at Ourense, Ourense, Spain
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7
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Astray G, Mejuto J, Morales J, Rial-Otero R, Simal-Gándara J. Factors controlling flavors binding constants to cyclodextrins and their applications in foods. Food Res Int 2010. [DOI: 10.1016/j.foodres.2010.02.017] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Influence of colloid suspensions of humic acids on the alkaline hydrolysis of N-methyl-N-nitroso-p-toluene sulfonamide. INT J CHEM KINET 2010. [DOI: 10.1002/kin.20481] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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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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10
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Raj V, Chandrakala T, Rajasekaran K. Guest-host interactions in the cleavage of phenylphenyl acetates by β-cyclodextrin in alkaline medium. J CHEM SCI 2008. [DOI: 10.1007/s12039-008-0055-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Matsumoto T, Liu Y, Sueishi Y, Yamamoto S. Effects of Ionic Surfactants and Cyclodextrins on Hydride-Transfer Reaction of 1-Benzyl-1,4-dihydronicotinamide with Methylene Blue. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.1383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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García-Río L, Mejuto J, Nieto M, Pérez-Juste J, Pérez-Lorenzo M, Rodríguez-Dafonte P. Denitrosation of N-Nitrososulfonamide as Chemical Probe for Determination of Binding Constants to Cyclodextrins. Supramol Chem 2007. [DOI: 10.1080/10610270500231824] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. García-Río
- a University of Santiago, Department of Physical Chemistry, Faculty of Chemistry , Spain
| | - J.C. Mejuto
- b University of Vigo at Ourense, Department of Physical Chemistry, Faculty of Science , Spain
| | - M. Nieto
- b University of Vigo at Ourense, Department of Physical Chemistry, Faculty of Science , Spain
| | - J. Pérez-Juste
- b University of Vigo at Ourense, Department of Physical Chemistry, Faculty of Science , Spain
| | - M. Pérez-Lorenzo
- a University of Santiago, Department of Physical Chemistry, Faculty of Chemistry , Spain
| | - P. Rodríguez-Dafonte
- a University of Santiago, Department of Physical Chemistry, Faculty of Chemistry , Spain
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Cabaleiro-Lago C, Nilsson M, Valente AJM, Bonini M, Söderman O. NMR diffusometry and conductometry study of the host–guest association between β-cyclodextrin and dodecane 1,12-bis(trimethylammonium bromide). J Colloid Interface Sci 2006; 300:782-7. [PMID: 16647078 DOI: 10.1016/j.jcis.2006.04.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2006] [Revised: 03/30/2006] [Accepted: 04/01/2006] [Indexed: 11/28/2022]
Abstract
Surfactants form association complexes with cyclodextrins. In the present investigation we have used NMR-diffusometry and electrical conductivity to follow the interactions which take place between beta-cyclodextrin and a bolaform surfactant: dodecane 1,12-bis(trimethylammonium bromide). Both (1)H NMR self-diffusion and conductometry data indicate the formation of a 1:1 inclusion complex. Assuming this stoichiometry, it was possible to calculate the association constant; from the analysis of the self-diffusion coefficients of free beta-cyclodextrin and the bolaform surfactant an association constant K=3x10(3)M(-1) was obtained while the analysis of conductivity data gave a comparable value of K=2.5x10(3)M(-1).
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Affiliation(s)
- Celia Cabaleiro-Lago
- Physical Chemistry 1, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE 221 00 Lund, Sweden.
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Cabaleiro-Lago C, García-Río L, Hervés P, Mejuto JC, Pérez-Juste J. Characterization of Alkane Diol-CD Complexes. Acid Denitrosation of N-Methyl-N-Nitroso-p-Toluenesulphonamide as a Chemical Probe. J INCL PHENOM MACRO 2006. [DOI: 10.1007/s10847-005-7379-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Arias M, García-Río L, Mejuto JC, Rodríguez-Dafonte P, Simal-Gándara J. Influence of micelles on the basic degradation of carbofuran. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2005; 53:7172-8. [PMID: 16131126 DOI: 10.1021/jf0505574] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The effect of micellar aggregates upon the stability of carbofuran in basic media has been studied. The effect of the presence of micelles upon the basic hydrolysis of carbofuran is a function of the nature of the surfactant monomer. Important catalysis of basic hydrolysis of carbofuran in the presence of colloid aggregates with positive surface charge has been reported. On the other hand, the presence of anionic and nonionic surfactants implies a large inhibition of the basic hydrolysis of carbofuran. Both catalysis and inhibition are due to the association of carbofuran with the micellar core. The kinetic constants for the basic hydrolysis of carbofuran in these microheterogeneous media have been obtained on the basis of a micellar pseudophase model. No significant changes in the intrinsic reactivity of HO- against carbofuran have been observed.
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Affiliation(s)
- Manuel Arias
- Area de Edafología y Química Agrícola, Facultad de Ciencias de Ourense, Universidad de Vigo, Ourense, Spain
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Zhu XQ, Hao WF, Tang H, Wang CH, Cheng JP. Determination of N−NO Bond Dissociation Energies of N-Methyl-N-nitrosobenzenesulfonamides in Acetonitrile and Application in the Mechanism Analyses on NO Transfer. J Am Chem Soc 2005; 127:2696-708. [PMID: 15725027 DOI: 10.1021/ja0443676] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The heterolytic and homolytic N-NO bond dissociation energies of seven substituted N-methyl-N-nitrosobenzenesulfonamides (abbreviated as G-MNBS, G = p-OCH(3), p-CH(3), p-H, p-Cl, p-Br, 2,5-2Cl, m-NO(2)) in acetonitrile solution were evaluated for the first time by using titration calorimetry and relative thermodynamic cycles according to Hess' law. The results show that the energetic scales of the heterolytic and homolytic N-NO bond dissociation energies of G-MNBS in acetonitrile solution cover the ranges from 44.3 to 49.5 and from 33.0 to 34.9 kcal/mol for the neutral G-MNBS, respectively, which indicates that N-methyl-N-nitrosobenzenesulfonamides are much easier to release a NO radical (NO(*)) than to release a NO cation (NO(+)). The estimation of the heterolytic and homolytic (N-NO)(-)(*) bond dissociation energies of the seven G-MNBS radical anions in acetonitrile solution gives the energetic ranges of -15.8 to -12.9 and -3.1 to 1.8 kcal/mol for the (N-NO)(-)(*) bond homolysis and heterolysis, respectively, which means that G-MNBS radical anions are very unstable at room temperature and able to spontaneously or easily release a NO radical or NO anion (NO(-)), but releasing a NO radical is easier than releasing NO anion. These determined N-NO bond dissociation energies of G-MNBS and their radical anions have been successfully used in the mechanism analyses of NO transfer from G-MNBS to 3,6-dibromocarbazole and the reactions of NO with the substituted N-methyl-benzenesulfonamide nitranions (G-MBSN(-)) in acetonitrile solution.
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Affiliation(s)
- Xiao-Qing Zhu
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Tianjin 300071, China.
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17
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García-Río L, Leis JR, Mejuto JC, Navarro-Vázquez A, Pérez-Juste J, Rodriguez-Dafonte P. Basic hydrolysis of crystal violet in beta-cyclodextrin/surfactant mixed systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:606-13. [PMID: 15773082 DOI: 10.1021/la035477d] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The basic hydrolysis of crystal violet (CV) in mixed systems consisting of beta-cyclodextrin (beta-CD) and a micelle-forming surfactant, cetyltrimethylammonium chloride (CTACl), has been studied. beta-CD was found to catalyze the basic hydrolysis of CV through the interaction of its hydroxyl group, in its deprotonated form, with the carbocation in the complexed substrate. The addition of small amounts of CTACl, with [CTACl] below the critical micelle concentration, to beta-CD solutions does not have an effect upon the observed rate constant for the basic hydrolysis of CV. This behavior is different from that observed for the alkaline hydrolysis of N-methyl-N-nitroso-p-toluenesulfonamide and nitrophenyl acetates in mixed beta-CD/cationic surfactant systems. The proposed mechanism allows us to explain the experimental results on the basis of the high percentage of uncomplexed beta-CD in equilibrium with the micellar system, the low CV concentration, and the high value for the binding constant of CV by beta-CD.
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Affiliation(s)
- L García-Río
- Departamento de Química Física, Facultad de Químicia, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
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