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Wu G, Chen SC, Wang YZ. Poly(ethylene imine)-Triggered Morphological Change of Anisotropic Micelles from Direct Aqueous Self-Assembly of an Amphiphilic Diblock Copolymer. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gang Wu
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan); State Key Laboratory of Polymer Materials Engineering; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
- School of Energy Science and Engineering; University of Electronic Science and Technology of China; Chengdu 611731 P. R. China
| | - Si-Chong Chen
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan); State Key Laboratory of Polymer Materials Engineering; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
| | - Yu-Zhong Wang
- National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan); State Key Laboratory of Polymer Materials Engineering; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
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Micellization behavior of the ionic liquid lauryl isoquinolinium bromide in aqueous solution. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-013-3151-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Lethu S, Matsuoka S, Murata M. Highly efficient preparation of selectively isotope cluster-labeled long chain fatty acids via two consecutive C(sp3)-C(sp3) cross-coupling reactions. Org Lett 2014; 16:844-7. [PMID: 24432759 DOI: 10.1021/ol4036159] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient synthesis involving two copper-catalyzed alkyl-alkyl coupling reactions has been designed to easily access doubly isotope-labeled fatty acids. Such NMR- and IR-active compounds were obtained in excellent overall yields and will be further used for determining the conformation of an alkyl chain of lipidic biomolecules upon interaction with proteins.
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Affiliation(s)
- Sébastien Lethu
- JST ERATO, Lipid Active Structure Project and §Project Research Center for Fundamental Sciences, Osaka University , 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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Baccile N, Babonneau F, Jestin J, Pehau-Arnaudet G, Van Bogaert I. Unusual, pH-induced, self-assembly of sophorolipid biosurfactants. ACS NANO 2012; 6:4763-76. [PMID: 22642974 DOI: 10.1021/nn204911k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
An increasing need exists for simple, bioderived, nontoxic, and up-scalable compounds with stimuli-responsive properties. Acidic sophorolipids (SL) are glucose-based biosurfactants derived from the yeast broth of Candida bombicola (teleomorph: Starmerella bombicola). The specific design of this molecule, a sophorose head with a free end-COOH group at the end of the alkyl chain, makes it a potentially interesting pH-responsive compound. We have specifically investigated this assumption using a combination of small angle neutron scattering (SANS), transmission electron microscopy under cryogenic conditions (Cryo-TEM), and nuclear magnetic resonance (NMR) techniques and found a strong dependence of SL self-assembly on the degree of ionization, α, of the COOH group at concentration values as low as 5 and 0.5 wt %. At least three regimes can be identified where the supramolecular behavior of SL is unexpectedly different: (1) at low α values, self-assembly is driven by concentration, C, and micelles are mainly identified as nonionic objects whose curvature decreases (sphere-to-rod) with C; (2) at mid α values, the formation of COO(-) groups introduces negative charges at the micellar surface inducing an increase in curvature (rod-to-sphere transition). Repulsive electrostatic long-range interactions appear at this stage. In both regimes 1 and 2, the cross-section radius of the micelles is below 25 Å. This behavior is concentration independent. (3) At α = 1, individual micelles seem to favor the formation of large netlike tubular aggregates whose size is above 100 nm. Such a complex behavior is very unique as it is generally not observed for common alkyl-based surfactants in concentration ranges below 5-10 wt %.
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Affiliation(s)
- Niki Baccile
- UPMC Université Paris 06, UMR 7574, Chimie de la Matière Condensée de Paris, F-75005, Paris, France.
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Yuan HZ, Tan XL, Cheng GZ, Zhao S, Zhang L, Mao SZ, An JY, Yu JY, Du YR. Micellization of Sodium Decyl Naphthalene Sulfonate Studied by 1H NMR. J Phys Chem B 2003. [DOI: 10.1021/jp022185x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. Z. Yuan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - X. L. Tan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - G. Z. Cheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - S. Zhao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - L. Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - S. Z. Mao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - J. Y. An
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - J. Y. Yu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Y. R. Du
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, China, and Department of Chemistry, Wuhan University, Wuhan 430072, China
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Feng Y, Fang XW, Mao SZ, Zhao S, Yuan HZ, Yu JY, Du YR. Interaction of poly(vinylpyrrolidone) with cationic and nonionic surfactants in aqueous solution studied by 1H NMR. Colloid Polym Sci 2003. [DOI: 10.1007/s00396-002-0855-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gharibi H, Hashemianzadeh S, Razavizadeh B. Determination of interaction parameters of mixed surfactant system using a Monte Carlo simulation technique. Colloids Surf A Physicochem Eng Asp 2002. [DOI: 10.1016/s0927-7757(01)00077-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Yuan HZ, Zhao S, Cheng GZ, Zhang L, Miao XJ, Mao SZ, Yu JY, Shen LF, Du YR. Mixed Micelles of Triton X-100 and Cetyl Trimethylammonium Bromide in Aqueous Solution Studied by 1H NMR. J Phys Chem B 2001. [DOI: 10.1021/jp0031303] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. Z. Yuan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - S. Zhao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - G. Z. Cheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - L. Zhang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - X. J. Miao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - S. Z. Mao
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - J. Y. Yu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - L. F. Shen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
| | - Y. R. Du
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, P.R. China, Institute of Photochemistry, The Chinese Academy of Sciences, Beijing 100101, P.R. China, and Department of Chemistry, Wuhan University, Wuhan 430072, P.R.China
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Suratkar V, Mahapatra S. Solubilization Site of Organic Perfume Molecules in Sodium Dodecyl Sulfate Micelles: New Insights from Proton NMR Studies. J Colloid Interface Sci 2000; 225:32-38. [PMID: 10767142 DOI: 10.1006/jcis.2000.6718] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The site of incorporation of solubilizates in sodium dodecyl sulfate (SDS) micellar systems has been investigated by proton NMR spectroscopy. The solubilizate molecules chosen for the present study are phenol, 4-methylphenol, 4-allyl-2-methoxyphenol, anisole, 4-methylanisole, 4-propenylanisole, 1,8-cineole, and limonene. These molecules possess a wide variety of functional groups with different degrees of hydrophilic/hydrophobic character and are thereby solubilized at different micellar locations. Aromatic compounds, especially those having a phenolic-OH group, showed a large upfield shift of SDS methylene protons that are closely linked to the terminal sulfate groups. Additionally, in the case of phenolic compounds, the unresolved signals of the nine straight-chain bulk methylene protons of SDS are split into a broad doublet with uneven intensity. This splitting of methylene protons was found to be dependent on the concentration of the substrate. Based on these observations, probable solubilization sites and orientation of the substrate molecule within the micelles are discussed. Phenolic compounds, being the most hydrophilic among the present set, reside at the hydrophilic/hydrophobic boundary of micelle-water interface and thus influence the resonances of SDS protons the most. Aromatic methoxy and aliphatic compounds, being relatively more hydrophobic in nature, reside inside the micellar core and thereby result in smaller shifts. Copyright 2000 Academic Press.
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Affiliation(s)
- V Suratkar
- Unilever Research India, I.C.T. Link Road, Andheri (East), Mumbai, 400 099, India
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Iijima H, Koyama S, Fujio K, Uzu Y. NMR Study of the Transformation of Perfluorinated Surfactant Solutions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1999. [DOI: 10.1246/bcsj.72.171] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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