scholarly journals Various Self-Assembly Behaviors of Amphiphilic Molecules in Ionic Liquids

10.5772/59095 ◽  
2015 ◽  
Author(s):  
Bin Dong ◽  
Yanan Gao
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Amphiphilic Molecules

scholarly journals Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra
Keyword(s):  
Noble Metal ◽  
Smart Materials ◽  
Self Assembly ◽  
Noble Metals ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Panoramic View ◽  
Amphiphilic Molecules

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

Aggregation Behaviours of Surface-Active Ionic Liquids 1-Alkyl-3-methylimidazolium Bis(2-ethylhexyl)sulfosuccinate

2016 ◽  
Vol 69 (11) ◽  
pp. 1254 ◽  
Author(s):  
Jiequn Wu ◽  
Tianxiang Yin ◽  
Shaoxiong Shi ◽  
Weiguo Shen
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Alkyl Chain ◽  
Systematic Investigation ◽  
Bulk Solution ◽  
Free Energies ◽  
Imidazolium Cation ◽  
Structure Transition ◽  
Surface Active ◽  
Counter Ion Binding

The systematic investigation of the aggregation behaviours of newly synthesised surface-active ionic liquids 1-alkyl-3-methylimidazolium bis(2-ethylhexyl)sulfosuccinate ([Cnmim][AOT], n = 2, 3, 5, 6, 7) by various techniques is reported. The critical aggregation concentrations (CACs) and the standard Gibbs free energies of aggregation () were determined from measurements on conductivity, fluorescence, and surface tension, which suggested a stronger self-assembly ability in the bulk solution for [Cnmim][AOT] surfactants with longer alkyl chain cations. An interesting structure transition driven by the penetration of the imidazolium cation into the aggregate when n > 4 was found by analysis of the variations of the values of CAC, , the degree of counter ion binding (β), and the micropolarity (I1/I3) immediately after the CAC with changing alkyl chain length of the imidazolium cation, which was further confirmed by 1H NMR measurements.

Self-Assembly of Polyether Diblock Copolymers in Water and Ionic Liquids

2016 ◽  
Vol 37 (14) ◽  
pp. 1207-1211 ◽  
Author(s):  
Yumi Kobayashi ◽  
Yuzo Kitazawa ◽  
Takahiro Komori ◽  
Kazuhide Ueno ◽  
Hisashi Kokubo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Diblock Copolymers

scholarly journals The Effect of Water and Confinement on Self-Assembly of Imidazolium Based Ionic Liquids at Mica Interfaces

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
H.-W. Cheng ◽  
J.-N. Dienemann ◽  
P. Stock ◽  
C. Merola ◽  
Y.-J. Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Effect Of Water

Modelling the dynamics of a minimal protocell container

2005 ◽  
Vol 4 (1) ◽  
pp. 81-91 ◽  
Author(s):  
Martin Nilsson Jacobi ◽  
Steen Rasmussen ◽  
Kolbjørn Tunstrøm
Keyword(s):  
Self Assembly ◽  
Large Scale ◽  
Lattice Gas ◽  
Three Dimensional ◽  
Initial Distribution ◽  
Energy Potential ◽  
Time Dynamics ◽  
Amphiphilic Molecules ◽  
Head Groups ◽  
Simplifying Assumptions

This paper is a discussion on how reaction kinetics and three-dimensional (3D) lattice simulations can be used to elucidate the dynamical properties of micelles as a possible minimal protocell container. We start with a general discussion on the role of molecular self-assembly in prebiotic and contemporary biological systems. A simple reaction kinetic model of a micellation process of amphiphilic molecules in water is then presented and solved analytically. Amphiphilic molecules are polymers with hydrophobic (water-fearing), e.g. hydrocarbon tail groups, and hydrophilic (water-loving) head groups, e.g. fatty acids. By making a few simplifying assumptions an analytical expression for the size distribution of the resulting micelles can be derived. The main part of the paper presents and discusses a lattice gas technique for a more detailed 3D simulation of molecular self-assembly of amphiphilic polymers in aqueous environments. Water molecules, hydrocarbon tail groups and hydrophilic head groups are explicitly represented on a three-dimensional discrete lattice. Molecules move on the lattice proportional to their continuous momentum. Collision rules preserve momentum and kinetic energy. Potential energy from molecular interactions are also included explicitly. The non-trivial thermodynamics of large-scale and long-time dynamics are studied. In this paper we specifically demonstrate how, from a random initial distribution, micelles are formed and grow until they destabilize and can divide. Eventually a steady state of growing and dividing micelles is formed. Towards the end of the paper we discuss the relevance of the presented results to the design of a minimal artificial protocell.

Self-assembly of new surface active ionic liquids based on Aerosol-OT in aqueous media

2014 ◽  
Vol 428 ◽  
pp. 267-275 ◽  
Author(s):  
K. Srinivasa Rao ◽  
Praveen Singh Gehlot ◽  
Tushar J. Trivedi ◽  
Arvind Kumar
Keyword(s):  
Ionic Liquids ◽  
Self Assembly ◽  
Aqueous Media ◽  
Aerosol Ot ◽  
Surface Active

Supramolecular helical nanostructures from self-assembly of coil–rod–coil amphiphilic molecules incorporating the dianthranide unit

Soft Matter ◽  
2018 ◽  
Vol 14 (33) ◽  
pp. 6822-6827 ◽  
Author(s):  
Shengsheng Yu ◽  
Rui Sun ◽  
Tie Chen ◽  
Long Yi Jin
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Temperature Sensitive ◽  
Amphiphilic Molecules

Coil–rod–coil amphiphilic molecules self-assemble in aqueous solution to form temperature-sensitive clew-like and temperature-insensitive nanodisk-like aggregates comprising helical nanofibers.

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