Role of the alkyl chain number and head groups location on surfactants self-assembly in aqueous solutions

Self-assembly in aqueous solutions of three quaternary salts based C16-type cationic surfactant with different polar head groups and identical carbon alkyl chain viz., cetylpyridinium bromide (CPB), cetyltrimethylammonium tosylate (CTAT), and...

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Self-Assembly of Amphiphilic Dendrimers: The Role of Generation and Alkyl Chain Length in siRNA Interaction

Scientific Reports ◽

10.1038/srep29436 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 19

Author(s):

Valeria Márquez-Miranda ◽

Ingrid Araya-Durán ◽

María Belén Camarada ◽

Jeffrey Comer ◽

Jesús A. Valencia-Gallegos ◽

...

Keyword(s):

Chain Length ◽

Self Assembly ◽

Alkyl Chain ◽

Alkyl Chain Length ◽

Amphiphilic Dendrimers

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The Role of the Counterions in Self-Assembly of J-Aggregates from meso-Aryl Substituted Porphyrin Diacids in Aqueous Solutions

Macroheterocycles ◽

10.6060/mhc150871g ◽

2015 ◽

Vol 8 (3) ◽

pp. 244-251 ◽

Cited By ~ 5

Author(s):

Margaret A. Gradova ◽

Vladimir N. Kuryakov ◽

Anton V. Lobanov

Keyword(s):

Aqueous Solutions ◽

Self Assembly ◽

J Aggregates

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Self-assembly of amphiphilic meso-aryl-substituted porphyrin derivatives in the presence of surfactants

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s108842461950175x ◽

2020 ◽

Vol 24 (04) ◽

pp. 505-514

Author(s):

Margaret A. Gradova ◽

Oleg V. Gradov ◽

Kseniya A. Zhdanova ◽

Natalya A. Bragina ◽

Anton V. Lobanov

Keyword(s):

Aqueous Solutions ◽

Self Assembly ◽

Photophysical Properties ◽

The Novel ◽

Dipole Interactions ◽

Porphyrin Derivatives ◽

Membrane Mimetic ◽

Surfactant Interactions ◽

Hydrophilic Lipophilic Balance

Surfactant-assisted self-assembly of porphyrin molecules in aqueous solutions sometimes leads to the formation of hybrid supramolecular structures with unusual photophysical properties resulting from the dipole–dipole interactions between the neighboring aromatic systems. The macrocycle orientation and interchromophore distance in such assemblies are determined by the dye–surfactant interactions, and hence, strongly depend on the molecular structure of both surfactant and porphyrin molecules. In this paper we studied the influence of the number and position of the peripheral alkyl chains of amphiphilic meso-aryl-substituted porphyrins on their aggregation behavior and intermolecular interactions with different surfactants in aqueous solutions. The studies revealed a crucial role of the local acidity on the micellar surface in the protolytic equilibrium of the porphyrin derivatives, as well as the influence of the macrocycle hydrophilic–lipophilic balance on its solubilization site within a micellar system. These findings enable prediction of the photophysical properties of amphiphilic porphyrin derivatives in the presence of different solubilizing agents and membrane-mimetic systems, and hence, selection the most suitable drug delivery systems for the novel amphiphilic porphyrin-based photosensitizers.

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Chiral recognition in aqueous solutions at 25 °C. A calorimetric study of the interaction between enantiomeric α-amino acids of different alkyl chain length

Canadian Journal of Chemistry ◽

10.1139/v91-118 ◽

1991 ◽

Vol 69 (5) ◽

pp. 794-797 ◽

Cited By ~ 28

Author(s):

Giuseppina Castronuovo ◽

Vittorio Elia ◽

Michela Magliulo

Keyword(s):

Amino Acids ◽

Aqueous Solutions ◽

Chiral Recognition ◽

Excess Enthalpy ◽

Alkyl Chain ◽

Alkyl Chain Length ◽

Calorimetric Study ◽

Experimental Uncertainty ◽

Enthalpies Of Dilution

Cross-homo- and cross-heterotactic enthalpic coefficients, [Formula: see text] respectively, were determined at 25 °C, measuring the enthalpies of dilution of ternary aqueous solutions containing two different α-amino acids of the same or different chirality. Differences of about 200–300 J mol−2 kg between cross-homo- and cross-heterotactic coefficients were found, well beyond the experimental uncertainty. The role of the zwitterionic interaction, already proposed to explain the nature of chiral recognition, was strengthened. Key words: α-amino acids, excess enthalpy, chiral recognition.

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Applying AFM-Based Nanofabrication for Measuring the Thickness of Nanopatterns: The Role of Head Groups in the Vertical Self-Assembly of ω-Functionalizedn-Alkanethiols

Langmuir ◽

10.1021/la9026128 ◽

2010 ◽

Vol 26 (5) ◽

pp. 3040-3049 ◽

Cited By ~ 14

Author(s):

Algernon T. Kelley ◽

Johnpeter N. Ngunjiri ◽

Wilson K. Serem ◽

Steve O. Lawrence ◽

Jing-Jiang Yu ◽

...

Keyword(s):

Self Assembly ◽

Head Groups

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Effect of Counter Ions on Self-assembly of Ionic Liquid 1-(2-Hydroxyethyl)-3-dodecylimidazolium Chloride in Aqueous Solutions

ACTA AGRONOMICA SINICA ◽

10.3724/sp.j.1095.2013.20260 ◽

2013 ◽

Vol 30 (4) ◽

pp. 431

Author(s):

Xuefeng LIU ◽

Hui CHEN ◽

Feifei TIAN ◽

Yun FANG

Keyword(s):

Ionic Liquid ◽

Aqueous Solutions ◽

Self Assembly ◽

Counter Ions

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Directive Effect of Chain Length in Modulating Peptide Nano-assemblies

Protein and Peptide Letters ◽

10.2174/0929866527666200224114627 ◽

2020 ◽

Vol 27 (9) ◽

pp. 923-929

Author(s):

Gaurav Pandey ◽

Prem Prakash Das ◽

Vibin Ramakrishnan

Keyword(s):

Electron Microscopy ◽

Amino Acids ◽

Light Scattering ◽

Chain Length ◽

Self Assembly ◽

The Self ◽

Ionic Charge ◽

Self Assembling ◽

Biophysical Techniques

Background: RADA-4 (Ac-RADARADARADARADA-NH2) is the most extensively studied and marketed self-assembling peptide, forming hydrogel, used to create defined threedimensional microenvironments for cell culture applications. Objectives: In this work, we use various biophysical techniques to investigate the length dependency of RADA aggregation and assembly. Methods: We synthesized a series of RADA-N peptides, N ranging from 1 to 4, resulting in four peptides having 4, 8, 12, and 16 amino acids in their sequence. Through a combination of various biophysical methods including thioflavin T fluorescence assay, static right angle light scattering assay, Dynamic Light Scattering (DLS), electron microscopy, CD, and IR spectroscopy, we have examined the role of chain-length on the self-assembly of RADA peptide. Results: Our observations show that the aggregation of ionic, charge-complementary RADA motifcontaining peptides is length-dependent, with N less than 3 are not forming spontaneous selfassemblies. Conclusion: The six biophysical experiments discussed in this paper validate the significance of chain-length on the epitaxial growth of RADA peptide self-assembly.

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On the Structure of Lead(II) Complexes in Aqueous Solutions. I. Trinuclear Clusters

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19950527 ◽

1995 ◽

Vol 60 (4) ◽

pp. 527-536 ◽

Cited By ~ 10

Author(s):

Martin Breza ◽

Alena Manová

Keyword(s):

Quantum Chemistry ◽

Aqueous Solutions ◽

Electronic Structures ◽

Mndo Method ◽

Model Systems ◽

Trinuclear Clusters ◽

The Stability ◽

Semiempirical Mndo

Using semiempirical MNDO method of quantum chemistry the optimal geometries and corresponding electronic structures of [Pb3(OH)n]6-n model systems as well as of their hydrated [Pb3(OH)n(H2O)8-n]6-n analogues (n = 4, 5) are investigated. The most stable trinuclear lead(II) complexes present in aqueous solutions correspond to cyclo-(μ3-OH)(μ2-OH)3Pb32+, Pb(μ-OH)2Pb(μ-OH)2Pb2+, cyclo-(μ3-OH)2(μ2-OH)3Pb3+, Pb(OH)(μ-OH)2Pb(μ-OH)Pb(OH)+ and Pb(OH)(μ-OH)2Pb(μ-OH)2Pb+ systems. The key role of OH bridges (by vanishing direct Pb-Pb bonds) on the stability of individual isomers is discussed.

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