Two distinct mechanisms of vesicle-to-micelle and micelle-to-vesicle transition are mediated by the packing parameter of phospholipid–detergent systems

Stuart, Marc C. A.; Boekema, Egbert J.

doi:10.1016/j.bbamem.2007.06.024

Cited by 94 publications

(122 citation statements)

References 38 publications

(54 reference statements)

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“…Images were recorded in the zero-loss imaging mode at 300 keV under low-dose conditions with a slow scan charge-coupled device (CCD) camera (Gatan, Pleasanton, CA). 32 Absorption and Linear Dichroism Spectroscopy. Absorption spectroscopy of TPPS 4 aggregates was performed using a Lambda 900 UV/vis/NIR spectrometer (PerkinElmer).…”

Section: Methodsmentioning

confidence: 99%

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

et al. 2009

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Exciton spectra and the microscopic structure of self-assembled porphyrin nanotubes Vlaming, S. M.; Augulis, R.; Stuart, M. C. A.; Knoester, J.; van Loosdrecht, P. H. M. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands ReceiVed: September 16, 2008; ReVised Manuscript ReceiVed: December 11, 2008 The optical properties of tubular aggregates formed by self-assembly of zwitterionic meso-tetra(4-sulfonatophenyl)porphyrin (TPPS 4 ) molecules are studied through a combination of experimental and theoretical techniques. The interest in these systems, with diameters of 18 nm and lengths extending up to micrometers, derives from their strong interaction with light and their similarity to natural light-harvesting systems for photosynthesis. The absorption and linear dichroism spectra are obtained in the spectral region from 300 to 750 nm, which includes the exciton bands deriving from the molecular B (Soret) as well as the Q transitions. We demonstrate that a Frenkel exciton model which takes into account the four dominant molecular excited states (B x , B y , Q x , and Q y ) provides a good global fit to the experimental spectra. From comparison between theory and experiment, we propose a detailed molecular structure within the nanotube.

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Section: Methodsmentioning

confidence: 99%

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

et al. 2009

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“…This result was similar to the reported transformation process of micelles to vesicles. [38] When the pressure was over 5.50 MPa, the maximum emission wavelength was nearly constant on increasing the pressure. This outcome shows that the structure of the aggregates did not change when the pressure was over 5.50 MPa.…”

Section: B)mentioning

confidence: 95%

Reversible Switching of a Micelle‐to‐Vesicle Transition by Compressed CO₂

Zhang

Zhao

et al. 2010

Chemistry A European J

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The study of the micelle-to-vesicle transition (MVT) is of great importance from both theoretical and practical points of view. Herein, we studied the effect of compressed CO(2) on the aggregation behavior of dodecyltrimethylammonium bromide (DTAB)/sodium dodecyl sulfate (SDS) mixed surfactants in aqueous solution by means of direct observation, turbidity and conductivity measurements, steady-state fluorescence, time-resolved fluorescence quenching (TRFQ), fluorescence quantum yield, and template methods. Interestingly, all these approaches showed that compressed CO(2) could induce the MVT in the surfactant system, and the vesicles returned to the micelles simply by depressurization; that is, CO(2) can be used to switch the MVT reversibly by controlling pressure. Some other gases, such as methane, ethylene, and ethane, could also induce the MVT of the surfactant solution. A possible mechanism is proposed on the basis of the packing-parameter theory and thermodynamic principles. It is shown that the mechanism of the MVT induced by a nonpolar gas is different from the MVT induced by polar and electrolyte additives.

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“…2 and an application of the Gibbs equation, we calculated the following other surface-active parameters: the surface tension at the CMC (g CMC ), the effectiveness of adsorption (pC 20 ), the amount of surfactant adsorbed per unit area on a saturated interface (G max ), and the À1 is plotted on the ordinate as a function of the mM surfactant concentration on the abscissa on an exponential scale. The CMC is the concentration at which the slope levels off.…”

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confidence: 99%

Microvesicle release and micellar attack as the alternative mechanisms involved in the red-blood-cell-membrane solubilization induced by arginine-based surfactants

et al. 2017

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Two novel arginine-based surfactants, Bz-Arg-NHC 10 and Bz-Arg-NHC 12 , were characterized with respect to surface properties and their interaction with human red-blood-cell (HRBC) membranes. The values for critical micellar concentration (CMC), the maximum surfactant adsorption at the air-liquid interface, and the area per molecule indicated better surface properties for Bz-Arg-NHC 12 . The observation of cylindrical worm-like aggregates of Bz-Arg-NHC n via atomic-force microscopy supported the predictions based on the value of the surfactant-packing parameter (SPP). Erythrocyte-membrane solubilization was effected by surfactant aggregates since cell lysis became evident at only surfactant concentrations above the CMC. Changes in HRBC shape observed at different surfactant concentrations led to the conclusion that a slow mechanism based on the insertion of surfactant monomers into the HRBC membrane, followed by a shedding of microvesicles was responsible for the hemolysis produced by both surfactants at the lower concentrations tested. In contrast, the extraction of membrane lipids upon collisions between HRBCs and surfactant aggregates competes with and prevents microvesicle release at the higher concentrations assayed.

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Two distinct mechanisms of vesicle-to-micelle and micelle-to-vesicle transition are mediated by the packing parameter of phospholipid–detergent systems

Cited by 94 publications

References 38 publications

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

Reversible Switching of a Micelle‐to‐Vesicle Transition by Compressed CO₂

Microvesicle release and micellar attack as the alternative mechanisms involved in the red-blood-cell-membrane solubilization induced by arginine-based surfactants

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Two distinct mechanisms of vesicle-to-micelle and micelle-to-vesicle transition are mediated by the packing parameter of phospholipid–detergent systems

Cited by 94 publications

References 38 publications

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

Exciton Spectra and the Microscopic Structure of Self-Assembled Porphyrin Nanotubes

Reversible Switching of a Micelle‐to‐Vesicle Transition by Compressed CO2

Microvesicle release and micellar attack as the alternative mechanisms involved in the red-blood-cell-membrane solubilization induced by arginine-based surfactants

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Reversible Switching of a Micelle‐to‐Vesicle Transition by Compressed CO₂