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Cornut D, Soulié M, Moreno A, Boussambe GNM, Damian M, Igonet S, Guillet P, Banères JL, Durand G. Non-ionic cholesterol-based additives for the stabilization of membrane proteins. Biochimie 2023; 205:27-39. [PMID: 36586567 DOI: 10.1016/j.biochi.2022.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/30/2022]
Abstract
We report herein the synthesis of two non-ionic amphiphiles with a cholesterol hydrophobic moiety that can be used as chemical additives for biochemical studies of membrane proteins. They were designed to show a high similarity with the planar steroid core of cholesterol and small-to-medium polar head groups attached at the C3 position of ring-A on the sterol skeleton. The two Chol-Tris and Chol-DG have a Tris-hydroxymethyl and a branched diglucose polar head group, respectively, which provide them sufficient water solubility when mixed with the "gold standard" detergent n-Dodecyl-β-D-Maltoside (DDM). The colloidal properties of these mixed micelles were investigated by means of surface tension (SFT) measurements and dynamic light scattering (DLS) experiments and showed the formation of globular micelles of about 8 nm in diameter with a critical micellar concentration of 0.20 mM for DDM:Chol-DG and 0.22 mM for DDM:Chol-Tris. We showed that mixed micelles do not alter the extraction potency of a G-protein coupled receptor (GPCR): the human adenosine A2A receptor (A2AR). The thermostabilizing effect of the mixed micelles was confirmed on two GPCRs, A2AR and the growth hormone secretagogue receptor (GHSR). Finally, these two mixed micelles were found suitable for the purification of an active form of A2AR which remained able to bind two ligands of different class i.e. the specific agonist CGS-21680 and the specific inverse agonist ZM-241385. This suggests that Chol-Tris and Chol-DG may be used as a non-ionic alternative to the cholesteryl hemisuccinate (CHS) stabilizing agent.
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Affiliation(s)
- Damien Cornut
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM & Avignon Université, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France; CHEM2STAB, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France
| | - Marine Soulié
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM & Avignon Université, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France; CHEM2STAB, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France
| | | | - Gildas Nyame Mendendy Boussambe
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM & Avignon Université, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France; CHEM2STAB, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France
| | - Marjorie Damian
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM, 1919 route de Mende, 34293, Montpellier, Cedex 5, France
| | | | - Pierre Guillet
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM & Avignon Université, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France; CHEM2STAB, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France
| | - Jean-Louis Banères
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM, 1919 route de Mende, 34293, Montpellier, Cedex 5, France
| | - Grégory Durand
- Institut des Biomolécules Max Mousseron UMR 5247 UM-CNRS-ENSCM & Avignon Université, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France; CHEM2STAB, 301 rue Baruch de Spinoza, 84916, Avignon, Cedex 9, France.
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2
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Wang T, Richard CA, Dong X, Shi GH. Impact of Surfactants on the Functionality of Prefilled Syringes. J Pharm Sci 2020; 109:3413-3422. [PMID: 32771345 DOI: 10.1016/j.xphs.2020.07.033] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 12/24/2022]
Abstract
Previous studies revealed the impact of formulation factors (excipients and pH) on the functionality of prefilled syringes. Surfactant, a critical formulation component for therapeutic proteins and antibodies, aids in minimizing protein adsorption onto interfaces and reduces protein aggregation or particulate formation. This study evaluated the impact of different surfactants and protein concentration on the functionality of prefilled syringes. Syringes filled with solution formulations with different surfactants were stored at various temperatures and evaluated at selected time points. Upon thermal stress, polysorbate 80 and dodecyl-β-d-maltoside containing formulations showed significantly greater increase in glide force when compared with poloxamer 407 containing formulations. In contrast, syringes filled with poloxamer 188 containing formulations did not show any increase in glide force under the same conditions. Based on the results from this study, the increase in syringe glide force was inversely correlated with hydrophobic-lipophilic balance values and surface tension of different surfactants. The mechanism of increase in glide force was primarily the change of silicone oil coverage and lubricity in the barrel of syringes.
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Affiliation(s)
- Tingting Wang
- Bioproduct Research and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA.
| | - Coralie A Richard
- Delivery Device and Connected Solutions, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - Xia Dong
- Biotechnology Research (Bio TDR), Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
| | - Galen Huaiqiu Shi
- Delivery Device and Connected Solutions, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, IN 46285, USA
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Clarke C, Spyropoulos F, Norton IT. A flow velocity dependence of dynamic surface tension in Plateau borders of foam. J Colloid Interface Sci 2020; 573:348-359. [PMID: 32298928 DOI: 10.1016/j.jcis.2020.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 11/24/2022]
Abstract
HYPOTHESIS Liquid drainage through foams is a multiscale process, that primarily occurs through channels known as Plateau borders (PBs). Recent experimental studies of isolated PBs have observed variations in channel surface tension, γ, with liquid flow rate, Q, for systems containing soluble low molecular weight surfactant (LMWS). The current study proposes that the dynamic surface tension (DST) could be responsible for this effect, where the residence time of surfactant molecules in the PB is similar to the time required for their adsorption to the channel interface. EXPERIMENTS Profile geometries of isolated 'ideal' PB's were created in a bespoke experimental setup at controlled forced liquid flow rates. Average surfactant residence times, τRes, were calculated for solutions of Sodium dodecylsulfate (SDS), Tween 20 (T20) and Tween 80 (T80), and used to calculate corresponding average DST values in discrete regions of measured PB profiles. DST values were combined with microscale drainage theory to assess the potential physical implications on liquid flow. FINDINGS Significant variations in the magnitude of γ were calculated based on surfactant characteristics, where only the rapid adsorption of SDS was sufficient to produce DST values approaching equilibrium. These findings seriously question assumptions of near equilibrium surface tension in LMWS foam systems above their critical micelle concentration (CMC). Furthermore, the presence of surface tension gradients identified using this discrete approach, highlights the need to further refine the current theory to a continuous approach incorporating Marangoni effects.
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Affiliation(s)
- Christopher Clarke
- Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
| | - Fotis Spyropoulos
- Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Ian T Norton
- Department of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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Qin T, Goual L, Piri M, Hu Z, Wen D. Pore-scale dynamics of nanofluid-enhanced NAPL displacement in carbonate rock. JOURNAL OF CONTAMINANT HYDROLOGY 2020; 230:103598. [PMID: 31898982 DOI: 10.1016/j.jconhyd.2019.103598] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023]
Abstract
This study presents a pore-scale investigation of two-phase flow dynamics during nanofluid flooding in subsurface formations containing non-aqueous phase liquids (NAPLs) such as crude oils. The goal was to gain fundamental understanding of the dominant displacement mechanisms of NAPL at different stages of nanofluid injection in a carbonate rock using x-ray microtomography integrated with a miniature core-flooding system. The nanofluid consisted of surfactant-based microemulsions with in-situ synthesized silica nanoparticles. After establishing its initial wettability state, the carbonate core sample was subjected to various pore volumes (PV) of nanofluid flooding (from 0.5 to 10) to examine the impact on NAPL flow dynamics. We found that most NAPL mobilization occurred within the first PV of injection, removing nearly 50% of NAPL from the rock. The nanofluid invaded into larger pores first due to a sharp decrease in NAPL/brine interfacial tension (from 14 to 0.5 mN/m) and contact angle (from 140 to 88°). With higher amount of nanofluid delivered into the pores through advection, over 90% of NAPL droplets were emulsified and their size decreased from 9 to 3 μm. Subsequent nanofluid injection could further remove NAPL from the smaller pores by altering the thickness of NAPL layers adsorbed on the rock. This dynamic solubilization process reached equilibrium after 5 PV of injection, leading to a reduced layer thickness (from 12 to 0.2 μm), a narrower in-situ contact angle distribution around 81°, and an additional 16% of NAPL removal.
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Affiliation(s)
- Tianzhu Qin
- Department of Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA
| | - Lamia Goual
- Department of Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA.
| | - Mohammad Piri
- Department of Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA
| | - Zhongliang Hu
- Department of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Dongsheng Wen
- Department of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, UK
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Gaudin T, Lu H, Fayet G, Berthauld-Drelich A, Rotureau P, Pourceau G, Wadouachi A, Van Hecke E, Nesterenko A, Pezron I. Impact of the chemical structure on amphiphilic properties of sugar-based surfactants: A literature overview. Adv Colloid Interface Sci 2019; 270:87-100. [PMID: 31200263 DOI: 10.1016/j.cis.2019.06.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 05/20/2019] [Accepted: 06/03/2019] [Indexed: 01/26/2023]
Abstract
In this review, structure-property trends are systematically analyzed for four amphiphilic properties of sugar-based surfactants: critical micelle concentration (CMC), its associated surface tension (γCMC), efficiency (pC20) and Krafft temperature (TK). First, the impact on amphiphilic properties of the alkyl chain size and the presence of branching and/or unsaturation is investigated. Then, various polar head parameters are explored, such as the degree of polymerization of the sugar unit (mono- or oligosaccharides), the chemical nature of the linker and the sugar configuration. Some systematic comparisons between ethoxylated surfactants and sugar-based surfactants are also carried out. While some structural trends with the impact of alkyl chain length or the polar head size are now well understood, this analysis points out that systematic studies of more specific effects of alkyl chain (e.g. branching, unsaturation, presence of rings, position on the polar head) and polar head (e.g. linker, anomeric configuration, internal stereochemistry, cyclic vs. acyclic sugar residues) were scarcer or not available to date. This work encourages the use of these structural trends in the perspective of developing new bio-based surfactants and their consideration in predictive models. It also highlights the need of further experimental tests to fill remaining gaps notably to explore some specific structural features (such as the introduction of rings in the alkyl chain or the position of the alkyl chain on the polar head) and towards applicative properties (like foaming capacity or wettability).
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7
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Yu D, Lan J, Khan NU, Li Q, Xu F, Huang G, Xu H, Huang F. The in vitro synergistic denaturation effect of heat and surfactant on photosystem I isolated from Arthrospira Platensis. PHOTOSYNTHESIS RESEARCH 2019; 141:229-243. [PMID: 30725234 DOI: 10.1007/s11120-019-00623-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 01/26/2019] [Indexed: 06/09/2023]
Abstract
Photosystem I (PSI) generates the most negative redox potential found in nature, and the performance of solar energy conversion into alternative energy sources in artificial systems highly depends on the thermal stability of PSI. Thus, understanding thermal denaturation is an important prerequisite for the use of PSI at elevated temperatures. To assess the thermal stability of surfactant-solubilized PSI from cyanobacteria Arthrospira Platensis, the synergistic denaturation effect of heat and surfactant was studied. At room temperature, surfactant n-dodecyl-β-D-maltoside solubilized PSI trimer gradually disassembles into PSI monomers and free pigments over long time. In the solubilizing process of PSI particles, surfactant can uncouple pigments of PSI, and the high concentration of surfactant causes the pigment to uncouple more; after the surfactant-solubilizing process, the uncoupling is relatively slow. During the heating process, changes were monitored by transmittance T800nm, ellipticity θ686nm and θ222nm, upon slow heating (1.5 °C per minute) of samples in Tris buffer (20 mM, pH 7.8) from 20 to 95 °C. The thermal denaturation of surfactant-solubilized PSI is a much more complicated process, which includes the uncoupling of pigments by surfactants, the disappearance of surrounding surfactants, and the unfolding of PSI α-helices. During the heating process, the uncoupling chlorophyll a (Chla) and converted pheophytin (Pheo) can form excitons of Chla-Pheo. The secondary structure α-helix of PSI proteins is stable up to 87-92 °C in the low-concentration surfactant solubilized PSI, and high-concentration surfactant and pigments uncoupling can accelerate the α-helical unfolding.
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Affiliation(s)
- Daoyong Yu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
| | - Jinxiao Lan
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Naseer Ullah Khan
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Quan Li
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Fengxi Xu
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Guihong Huang
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China
| | - Hai Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
- Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, Shandong, China.
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8
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Aggregation properties of sucrose fatty acid esters and some other sugar-based surfactants at different temperatures. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Javanbakht G, Goual L. Impact of Surfactant Structure on NAPL Mobilization and Solubilization in Porous Media. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gina Javanbakht
- Department
of Petroleum Engineering, University of Wyoming, 1000 East University
Avenue, Laramie, Wyoming 82071, United States
| | - Lamia Goual
- Department
of Petroleum Engineering, University of Wyoming, 1000 East University
Avenue, Laramie, Wyoming 82071, United States
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10
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Bąk A, Podgórska W. Interfacial and surface tensions of toluene/water and air/water systems with nonionic surfactants Tween 20 and Tween 80. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.091] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Bąk A, Podgórska W. Influence of poly(vinyl alcohol) molecular weight on drop coalescence and breakage rate. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2015.10.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Preparation of S-glycoside surfactants and cysteine thioglycosides using minimally competent Lewis acid catalysis. Carbohydr Res 2016; 422:1-4. [PMID: 26795078 DOI: 10.1016/j.carres.2015.12.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/03/2015] [Accepted: 12/26/2015] [Indexed: 11/21/2022]
Abstract
Here we report a method for the preparation of anomerically pure β-S-glycopyranosides (1,2-trans-glycosides) from the corresponding peracetate donors. S-glycosylation was performed in CHCl3 at reflux in the presence of a catalytic amount of InBr3. Deacylation of the intermediate peracetates were achieved under Zemplén conditions. Five pyranose examples, monosaccharides D-glucose and D-galactose and disaccharides cellobiose, maltose, and lactose, were used as donors, and five thiols including an α/ω dithiol and Fmoc-L-cysteine were used as acceptors. Melting points, high res MS, [α]D and NMR data ((1)H and (13)C, including COSY, HSQC and HMBC) are reported for compounds not previously described.
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13
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Peng Y, Totsingan F, Meier MAR, Steinmann M, Wurm F, Koh A, Gross RA. Sophorolipids: Expanding structural diversity by ring-opening cross-metathesis. EUR J LIPID SCI TECH 2014. [DOI: 10.1002/ejlt.201400466] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yifeng Peng
- Department of Chemistry and Biology; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy NY USA
- Department of Chemical and Biomolecular Engineering; New York University; Polytechnic School of Engineering; Brooklyn NY USA
| | - Filbert Totsingan
- Department of Chemistry and Biology; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy NY USA
| | - Michael A. R. Meier
- Institute of Organic Chemistry; Karlsruhe Institute of Technology; Karlsruhe Germany
| | - Mark Steinmann
- Max Planck Institute for Polymer Research; Mainz Germany
| | - Frederik Wurm
- Max Planck Institute for Polymer Research; Mainz Germany
| | - Amanda Koh
- Department of Chemical and Biological Engineering; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy NY USA
| | - Richard A. Gross
- Department of Chemistry and Biology; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy NY USA
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14
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Adem YT, Molina P, Liu H, Patapoff TW, Sreedhara A, Esue O. Hexyl Glucoside and Hexyl Maltoside Inhibit Light-Induced Oxidation of Tryptophan. J Pharm Sci 2014; 103:409-16. [DOI: 10.1002/jps.23809] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 11/06/2013] [Accepted: 11/13/2013] [Indexed: 02/03/2023]
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15
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Drop breakage and coalescence in the toluene/water dispersions with dissolved surface active polymers PVA 88% and 98%. Chem Eng Res Des 2013. [DOI: 10.1016/j.cherd.2013.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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Bąk A, Podgórska W. Investigation of drop breakage and coalescence in the liquid–liquid system with nonionic surfactants Tween 20 and Tween 80. Chem Eng Sci 2012. [DOI: 10.1016/j.ces.2012.02.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Zhang YJ, Dayoub W, Chen GR, Lemaire M. TMDS as a Dual-Purpose Reductant in the Regioselective Ring Cleavage of Hexopyranosyl Acetals to Ethers. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101682] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Nakagawa A, Kamitakahara H, Takano T. Synthesis of blockwise alkylated (1→4) linked trisaccharides as surfactants: influence of configuration of anomeric position on their surface activities. Carbohydr Res 2011; 346:1671-83. [DOI: 10.1016/j.carres.2011.04.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 04/18/2011] [Accepted: 04/26/2011] [Indexed: 10/18/2022]
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19
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Lipshutz BH, Ghorai S, Abela AR, Moser R, Nishikata T, Duplais C, Krasovskiy A, Gaston RD, Gadwood RC. TPGS-750-M: a second-generation amphiphile for metal-catalyzed cross-couplings in water at room temperature. J Org Chem 2011; 76:4379-91. [PMID: 21548658 PMCID: PMC3608414 DOI: 10.1021/jo101974u] [Citation(s) in RCA: 255] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
An environmentally benign surfactant (TPGS-750-M), a diester composed of racemic α-tocopherol, MPEG-750, and succinic acid, has been designed and readily prepared as an effective nanomicelle-forming species for general use in metal-catalyzed cross-coupling reactions in water. Several "name" reactions, including Heck, Suzuki-Miyaura, Sonogashira, and Negishi-like couplings, have been studied using this technology, as have aminations, C-H activations, and olefin metathesis reactions. Physical data in the form of DLS and cryo-TEM measurements suggest that particle size and shape are key elements in achieving high levels of conversion and, hence, good isolated yields of products. This new amphiphile will soon be commercially available.
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Affiliation(s)
- Bruce H. Lipshutz
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Subir Ghorai
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Alexander R. Abela
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Ralph Moser
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Takashi Nishikata
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Christophe Duplais
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
| | - Arkady Krasovskiy
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106
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Lim HN, Kassim A, Huang NM, Radiman S, Yarmo MA, Yeong SK, Khiew PS, Chiu WS. Three-Component Olive Oil-In-Water High Internal Phase Emulsions Stabilized by Palm Surfactant and Their Moisturizing Properties. J DISPER SCI TECHNOL 2009. [DOI: 10.1080/01932690903107331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Lim H, Kassim A, Huang N, Yarmo MA, Yeong S, Khiew P, Chiu W. One-pot preparation of three-component oil-in-water high internal phase emulsions stabilized by palm-based laureth surfactants and their moisturizing properties. COLLOID JOURNAL 2009. [DOI: 10.1134/s1061933x09050111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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23
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Lipshutz BH, Aguinaldo GT, Ghorai S, Voigtritter K. Olefin Cross-Metathesis Reactions at Room Temperature Using the Nonionic Amphiphile “PTS”: Just Add Water. Org Lett 2008; 10:1325-8. [DOI: 10.1021/ol800028x] [Citation(s) in RCA: 148] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bruce H. Lipshutz
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106
| | - Grant T. Aguinaldo
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106
| | - Subir Ghorai
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106
| | - Karl Voigtritter
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106
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24
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Geerken MJ, Lammertink RGH, Wessling M. Interfacial aspects of water drop formation at micro-engineered orifices. J Colloid Interface Sci 2007; 312:460-9. [PMID: 17482637 DOI: 10.1016/j.jcis.2007.03.074] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Revised: 03/27/2007] [Accepted: 03/31/2007] [Indexed: 11/26/2022]
Abstract
The formation of emulsions with micro-engineered silicon based arrays of micro-orifices is a relatively new technique. Until now, only the preparation of oil-in-water emulsions was studied due to the hydrophilic nature of silicon. This work evaluates the emulsification of water into n-hexadecane with hydrophobized arrays of micro-orifices. We have studied the drop formation rate, the number of active pores and the drop size. In contrast to conventional macroporous membranes used for membrane emulsification, we observed high dispersed phase fluxes up to 4600 L h(-1) m(-2) bar(-1) while all pores being active at applied pressures below 2 times the critical pressure. The drop diameter was independent from the applied pressure difference. We observed a pressure dependent lag time between drop formations at low emulsification pressures. The lag time is related to the rate of surfactant diffusion to the water-oil interface causing a reduction of the interfacial tension. A significant influence of the used hydrophobization agents, perfluorinated octyltrichlorosilane (FOTS) and octyltrichlorosilane (OTS), was found for the resulting drop sizes and the number of active pores.
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Affiliation(s)
- Maik J Geerken
- Membrane Technology Group, Faculty of Science and Technology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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Pacetti D, Boselli E, Lucci P, Frega NG. Simultaneous analysis of glycolipids and phospholids molecular species in avocado (Persea americana Mill) fruit. J Chromatogr A 2007; 1150:241-51. [PMID: 17074356 DOI: 10.1016/j.chroma.2006.10.022] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 09/04/2006] [Accepted: 10/11/2006] [Indexed: 10/24/2022]
Abstract
The molecular species of phospholipids (PLs) and glycolipids (GLs) were simultaneously characterized in the pulp and almond of the avocado fruit (Persea americana Mill) of four varieties by means of high performance liquid chromatography-electrospray ionisation ion-trap tandem mass spectrometry. In the pulp, the predominant species of monoglycosyldiglycerides (MGD) were m/z 796.6 (oleic/linolenic and linoleic/linoleic acids) and m/z 800.4 (stearic/linoleic and oleic/oleic acids). One of the main diglycosyldiglycerides (DGD) both in the pulp and almond was m/z 958.5 (oleic/linolenic); however, the pulp was also rich of m/z 962.4 (oleic/oleic), whereas in the almond, m/z 934.5 (palmitic/linoleic and palmitoleic/oleic) and m/z 960.5 (oleic/linoleic and stearic/linolenic) were more abundant. In the almond, the main PL classes (phosphatidic acid (PA), phosphatidylcholine (PC), phosphatidylethanolamine (PE) and phosphatidylinositol (PI)) contained always palmitic/linoleic acids. Alpha-linolenic acid was contained as MGD (linolenic/linolenic) and DGD (linolenic/linolenic), more present in the pulp than in the almond. The major molecular species of glycocerebrosides (GCer) in the pulp and almond carried hydroxy-palmitic acid (C(16h:0))/4,8-sphyngadienine (d(18:2)).
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Affiliation(s)
- Deborah Pacetti
- Dipartimento di Scienze degli Alimenti, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
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Grigoriev D, Stubenrauch C. Surface elasticities of aqueous β-dodecyl-d-maltoside solutions: A capillary wave study. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.09.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Geerken M, Lammertink R, Wessling M. Tailoring surface properties for controlling droplet formation at microsieve membranes. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.06.030] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Rojas OJ, Neuman RD, Claesson PM. Viscoelastic Properties of Isomeric Alkylglucoside Surfactants Studied by Surface Light Scattering. J Phys Chem B 2005; 109:22440-8. [PMID: 16853923 DOI: 10.1021/jp054132w] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Surface light scattering (SLS) by capillary waves was used to investigate the adsorption behavior of non-ionic sugar surfactants at the air/liquid interface. SLS by the subphase (water) followed predictions from hydrodynamic theory. The viscoelastic properties (surface elasticity and surface viscosity) of monolayers formed by octyl beta-glucoside, octyl alpha-glucoside, and 2-ethylhexyl alpha-glucoside surfactants were quantified at submicellar concentrations. It is further concluded that a diffusional relaxation model describes the observed trends in high-frequency, nonintrusive laser light scattering experiments. The interfacial diffusion coefficients that resulted from fitting this diffusional relaxation model to surface elasticity values obtained with SLS reflect the molecular dynamics of the subphase near the interface. However, differences from the theoretical predictions indicate the existence of effects not accounted for such as thermal convection, molecular rearrangements, and other relaxation mechanisms within the monolayer. Our results demonstrate important differences in molecular packing at the air-water interface for the studied isomeric surfactants.
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Affiliation(s)
- Orlando J Rojas
- Forest Biomaterials Laboratory, College of Natural Resources, North Carolina State University, Box 8005, Raleigh, North Carolina 27695, USA.
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