Structures of Fibrous Supramolecular Assemblies Constructed by Amino Acid Surfactants: Investigation by AFM, SANS, and SAXS

Imae, Toyoko; Hayashi, Naoki; Matsumoto, Takayoshi; Tada, Takeshi; Furusaka, M.

doi:10.1006/jcis.2000.6763

Cited by 33 publications

(38 citation statements)

References 34 publications

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“…No hollow tubules were reported. Cylindrical fibers were also obtained from N-dodecanoyl-␤-alanine (19,20). They were more similar to F-Glu tubules in the sense that they appear to be constructed by radial multilamellar layers of amphiphiles.…”

Section: Introductionmentioning

confidence: 99%

Small-Angle Scattering and Electron Microscopy Investigation of Nanotubules Made from a Perfluoroalkylated Glucophospholipid

Imae

Funayama

Krafft

et al. 1999

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Small-Angle Scattering and Electron Microscopy Investigation of Nanotubules Made from a Perfluoroalkylated Glucophospholipid

Imae

Funayama

Krafft

et al. 1999

Journal of Colloid and Interface Science

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“…to form a gel (6,14,(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28), compound 1 was observed to gel in pure water at concentrations as low as 20 mg/ml and higher simply upon equilibration at room temperature. Figure 2 illustrates the evolution of a gel in a 50 mg/ml solution.…”

Section: Visual Observation Of Gelationmentioning

confidence: 98%

“…Most commonly it is through heating to an isotropic supersaturated solution followed by a drop in temperature below the gelator's solubility limit (19)(20)(21)(22)(23). Other "stimuli" include introduction of an anti-solvent (24) or another compound (25), pH adjustment (14,26), and sonication (27).…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Gelation of a Novel Histamine H4 Receptor Antagonist in Aqueous Solution

et al. 2011

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“…A comparable behavior has been observed more recently with chiral double-chain nucleolipids like DPUPC (1,2-dipalmitoyluridinophosphocholine, see Figure 4), as shown in Figure 6 (Moreau et al, 2004). (ii) Chiral amphiphilic amino acid derivatives in aqueous solution below T m can form helical strands (Nakanishi et al, 1985;Nakashima et al, 1994;Cescato et al, 1997;Imae et al, 2000). (iii) Chiral N-octyl-and Ndodecyl-D-gluconamides form helical strands in aqueous solution (Köning et al, 1993).…”

Section: The Formation Of Chiral Aggregates From Chiral Surfactantsmentioning

confidence: 99%

Surfactant Assemblies and their Various Possible Roles for the Origin(S) of Life

Walde

2006

Orig Life Evol Biosph

138

110

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A large number of surfactants (surface active molecules) are chemically simple compounds that can be obtained by simple chemical reactions, in some cases even under presumably prebiotic conditions. Surfactant assemblies are self-organized polymolecular aggregates of surfactants, in the simplest case micelles, vesicles, hexagonal and cubic phases. It may be that these different types of surfactant assemblies have played various, so-far underestimated important roles in the processes that led to the formation of the first living systems. Although nucleic acids are key players in the formation of cells as we know them today (RNA world hypothesis), it is still unclear how RNA could have been formed under prebiotic conditions. Surfactants with their self-organizing properties may have assisted, controlled and compartimentalized some of the chemical reactions that eventually led to the formation of molecules like RNA. Therefore, surfactants were possibly very important in prebiotic times in the sense that they may have been involved in different physical and chemical processes that finally led to a transformation of non-living matter to the first cellular form(s) of life. This hypothesis is based on four main experimental observations: (i) Surfactant aggregation can lead to cell-like compartimentation (vesicles). (ii) Surfactant assemblies can provide local reaction conditions that are very different from the bulk medium, which may lead to a dramatic change in the rate of chemical reactions and to a change in reaction product distributions. (iii) The surface properties of surfactant assemblies that may be liquid- or solid-like, charged or neutral, and the elasticity and packing density of surfactant assemblies depend on the chemical structure of the surfactants, on the presence of other molecules, and on the overall environmental conditions (e. g. temperature). This wide range of surface characteristics of surfactant assemblies may allow a control of surface-bound chemical reactions not only by the charge or hydrophobicity of the surface but also by its "softness". (iv) Chiral polymolecular assemblies (helices) may form from chiral surfactants. There are many examples that illustrate the different roles and potential roles of surfactant assemblies in different research areas outside of the field of the origin(s) of life, most importantly in investigations of contemporary living systems, in nanotechnology applications, and in the development of drug delivery systems. Concepts and ideas behind many of these applications may have relevance also in connection to the different unsolved problems in understanding the origin(s) of life.

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Structures of Fibrous Supramolecular Assemblies Constructed by Amino Acid Surfactants: Investigation by AFM, SANS, and SAXS

Cited by 33 publications

References 34 publications

Small-Angle Scattering and Electron Microscopy Investigation of Nanotubules Made from a Perfluoroalkylated Glucophospholipid

Small-Angle Scattering and Electron Microscopy Investigation of Nanotubules Made from a Perfluoroalkylated Glucophospholipid

Spontaneous Gelation of a Novel Histamine H4 Receptor Antagonist in Aqueous Solution

Surfactant Assemblies and their Various Possible Roles for the Origin(S) of Life

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