scholarly journals Control of the hierarchical self-assembly of polyoxometalate-based metallomacrocycles by redox trigger and solvent composition

2018 ◽  
Vol 115 (36) ◽  
pp. 8895-8900 ◽  
Author(s):  
Madeleine Piot ◽  
Benjamin Abécassis ◽  
Dalil Brouri ◽  
Claire Troufflard ◽  
Anna Proust ◽  
...  
Keyword(s):  
Self Assembly ◽  
Electrostatic Interactions ◽  
Solvent Composition ◽  
Emergent Properties ◽  
Supramolecular Organization ◽  
Solubility In Water ◽  
Hierarchical Nanostructures ◽  
Supramolecular Architectures ◽  
Different Types ◽  
Aggregation Modes Of

Discrete metallomacrocycles are attractive scaffolds for the formation of complex supramolecular architectures with emergent properties. We herein describe the formation of hierarchical nanostructures using preformed metallomacrocycles by coordination-driven self-assembly of a covalent organic–inorganic polyoxometalate (POM)-based hybrid. In this system, we take advantage of the presence of charged subunits (POM, metal linker, and counterions) within the metallomacrocycles, which drive their aggregation through intermolecular electrostatic interactions. We show that the solvent composition and the charge of the metal linker are key parameters that steer the supramolecular organization. Different types of hierarchical self-assemblies, zero-dimensional (0D) dense nanoparticles, and 1D worm-like nanoobjects, can be selectively formed owing to different aggregation modes of the metallomacrocycles. Finally, we report that the worm-like structures drastically enhance the solubility in water of a pyrene derivative and can act as molecular carriers.

Supramolecular Assemblies for Second Order Nonlinear Optics Stabilized by Electrostatic Interaction

1998 ◽  
Vol 07 (03) ◽  
pp. 385-395 ◽  
Author(s):  
H. Bock ◽  
R. C. Advincula ◽  
E. F. Aust ◽  
J. Käshammer ◽  
W. H. Meyer ◽  
...  
Keyword(s):  
Nonlinear Optics ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Orientational Order ◽  
Second Order ◽  
Langmuir Blodgett ◽  
Supramolecular Architectures ◽  
Buffer Material ◽  
Adsorption From Solution ◽  
Synthetic Effort

Electrostatic interactions are being used instead of covalent linkage to stabilize orientational order in novel materials for second order nonlinear optics. In complex supramolecular architectures, this simplifies the variation of chromophores or polymeric backbones. Other molecules can readily be inserted into the system in order to tune optical or thermodynamic properties without synthetic effort. Noncentrosymmetric ultrathin films consisting of highly ordered "active-passive" AB-Y-type multilayers of NLO active ionic amphiphiles and an ionic polymeric buffer material have been obtained by the Langmuir-Blodgett-Kuhn (LBK) technique. Combination with self-assembly by adsorption from solution is demonstrated.

scholarly journals Supramolecular Thiophene-Based Materials: A Few Examples of the Interplay between Synthesis, Optoelectronic Properties and Applications

2021 ◽  
Vol 03 (02) ◽  
pp. 321-336
Author(s):  
Francesca Di Maria ◽  
Mattia Zangoli ◽  
Giovanna Barbarella
Keyword(s):  
Self Assembly ◽  
Short Review ◽  
Optoelectronic Properties ◽  
Chemical Diversity ◽  
Supramolecular Organization ◽  
Supramolecular Architectures ◽  
Multiple Length Scales ◽  
Concise Report ◽  
Thiophene Derivatives ◽  
Thiophene Based Polymers

Supramolecular nanostructured thiophene based materials with optoelectronic functions are of wide current interest and are playing a crucial role in different fields of nanoscience and nanotechnology. This short review gives a concise report of some particularly interesting examples from our own work concerning thiophene-based supramolecular architectures at multiple length scales, their function and application in devices. We start with some general considerations on the great chemical diversity of thiophene derivatives and their supramolecular architectures. Then we focus on how the supramolecular organization of specific thiophene derivatives may generate nanostructures that enable new functions and applications in devices. For each example, we report the synthesis of the corresponding thiophene derivatives.1. Introduction2. Supramolecular Organization may Impart New Functions to the System3. Supramolecular and Optoelectronic Properties of Oligothiophene-S,S-dioxides4. Colloidal Nanoparticles formed by Self-Assembly of Thiophene-Based Polymers5. Conclusions and Outlook

In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Hao Wu ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Matthew Tirrell
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Polyelectrolyte Complex ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

scholarly journals Interactions between an Associative Amphiphilic Block Polyelectrolyte and Surfactants in Water: Effect of Charge Type on Solution Properties and Aggregation

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1729
Author(s):  
Patrizio Raffa
Keyword(s):  
Surface Tension ◽  
Self Assembly ◽  
Interaction Model ◽  
Industrial Applications ◽  
Molecular Organization ◽  
Different Types ◽  
Solution Rheology ◽  
Interesting Class ◽  
First Time

The study of interactions between polyelectrolytes (PE) and surfactants is of great interest for both fundamental and applied research. These mixtures can represent, for example, models of self-assembly and molecular organization in biological systems, but they are also relevant in industrial applications. Amphiphilic block polyelectrolytes represent an interesting class of PE, but their interactions with surfactants have not been extensively explored so far, most studies being restricted to non-associating PE. In this work, interactions between an anionic amphiphilic triblock polyelectrolyte and different types of surfactants bearing respectively negative, positive and no charge, are investigated via surface tension and solution rheology measurements for the first time. It is evidenced that the surfactants have different effects on viscosity and surface tension, depending on their charge type. Micellization of the surfactant is affected by the presence of the polymer in all cases; shear viscosity of polymer solutions decreases in presence of the same charge or nonionic surfactants, while the opposite charge surfactant causes precipitation. This study highlights the importance of the charge type, and the role of the associating hydrophobic block in the PE structure, on the solution behavior of the mixtures. Moreover, a possible interaction model is proposed, based on the obtained data.

Synthesis and supramolecular organization of the iodide and triiodides of a polycyclic adamantane-based diammonium cation: the effects of hydrogen bonds and weak I⋯I interactions

CrystEngComm ◽  
2021 ◽  
Vol 23 (12) ◽  
pp. 2384-2395
Author(s):  
Ivan A. Mezentsev-Cherkes ◽  
Tatiana A. Shestimerova ◽  
Aleksei V. Medved'ko ◽  
Mikhail A. Kalinin ◽  
Alexey N. Kuznetsov ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Building Blocks ◽  
Supramolecular Organization ◽  
Supramolecular Architectures

Adamantane-like divalent building blocks and iodide or polyiodide anions combine into supramolecular architectures with the help of various noncovalent forces ranging from strong hydrogen bonds to secondary and weak I⋯I interactions.

Role of non-covalent interactions in the supramolecular architectures of mercury(ii) diphenyldithiophosphates: An experimental and theoretical investigation

2021 ◽  
Vol 45 (4) ◽  
pp. 2249-2263
Author(s):  
Pretam Kumar ◽  
Snehasis Banerjee ◽  
Anu Radha ◽  
Tahira Firdoos ◽  
Subash Chandra Sahoo ◽  
...  
Keyword(s):  
Theoretical Investigation ◽  
Supramolecular Organization ◽  
Π Interactions ◽  
Supramolecular Architectures ◽  
Non Covalent Interactions ◽  
Covalent Interactions

The H-bond, spodium bond and CH⋯π interactions playing an important role in the supramolecular organization of two mercury(ii) diphenyldithiophosphate complexes have been discussed.

2D Self-assembly and Electronic Characterization of Oxygen-Boron-Oxygen-Doped Chiral Graphene Nanoribbons

2021 ◽  
Author(s):  
Lei Jin ◽  
Nerea Bilbao ◽  
Yang Lv ◽  
Xiao-Ye Wang ◽  
Soltani Paniz ◽  
...  
Keyword(s):  
Edge Effects ◽  
Self Assembly ◽  
Quantum Confinement ◽  
Graphene Nanoribbons ◽  
One Dimensional ◽  
The Past ◽  
Different Types

Graphene nanoribbons (GNRs), quasi-one-dimensional strips of graphene, exhibit a nonzero bandgap due to quantum confinement and edge effects. In the past decade, different types of GNRs with atomically precise structures...

Reversible Self-Assembly of Entrapped Fluorescent Gelators in Polymerized Styrene Gel Matrix: Erasable Thermal Imaging via Recreation of Supramolecular Architectures

2009 ◽  
Vol 131 (42) ◽  
pp. 15122-15123 ◽  
Author(s):  
Sampath Srinivasan ◽  
Palathingal A. Babu ◽  
Sankarapillai Mahesh ◽  
Ayyappanpillai Ajayaghosh
Keyword(s):  
Self Assembly ◽  
Thermal Imaging ◽  
Supramolecular Architectures

Self-assembly fabrication of 3D flower-like ZnO hierarchical nanostructures and their gas sensing properties

CrystEngComm ◽  
2012 ◽  
Vol 14 (5) ◽  
pp. 1775 ◽  
Author(s):  
Haijiao Zhang ◽  
Ruofei Wu ◽  
Zhiwen Chen ◽  
Gang Liu ◽  
Zongnan Zhang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Gas Sensing ◽  
Hierarchical Nanostructures ◽  
Sensing Properties ◽  
Gas Sensing Properties

scholarly journals Chirality, Gelation Ability and Crystal Structure: Together or Apart? Alkyl Phenyl Ethers of Glycerol as Simple LMWGs

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 732
Author(s):  
Alexander A. Bredikhin ◽  
Aidar T. Gubaidullin ◽  
Zemfira A. Bredikhina ◽  
Robert R. Fayzullin ◽  
Olga A. Lodochnikova
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Soft Materials ◽  
Gelling Agent ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Types ◽  
Low Molecular Weight Gelators ◽  
Phenyl Ethers

Chiral recognition plays an important role in the self-assembly of soft materials, in particular supramolecular organogels formed by low molecular weight gelators (LMWGs). Out of 14 pairs of the studied racemic and enantiopure samples of alkyl-substituted phenyl ethers of glycerol, only eight enantiopure diols form the stable gels in nonane. The formation of gels from solutions was studied by polarimetry, and their degradation with the formation of xerogels was studied by the PXRD method. The revealed crystalline characteristics of all studied xerogels corresponded to those for crystalline samples of the parent gelators. In addition to those previously investigated, crystalline samples of enantiopure para-n-alkylphenyl glycerol ethers [alkyl = pentyl (5), hexyl (6), heptyl (7), octyl (8), nonyl (9)] and racemic 3-(3,5-dimethylphenoxy)propane-1,2-diol (rac-14) have been examined by single crystal X-ray diffraction analysis. Among 22 samples of compounds 1-14 studied by SC-XRD, seven different types of supramolecular motifs are identified, of which only two are realized in crystals of supramolecular gelators. An attempt was made to relate the ability to gel formation with the characteristics of the supramolecular motif of a potential gelling agent, and the frequency of formation of the motif, required for gelation, with the chiral characteristics of the sample.

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