Chemical reactivity and solution structure: on the way to a paradigm shift?

Kononov, L. O.

doi:10.1039/c4ra17257d

Cited by 100 publications

(101 citation statements)

References 155 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because the properties of materials are governed by their structural uniformity on the micrometer scale, microflow systems are appropriate for the fabrication of functional materials. [9] Despite the wide range of applications in this area, the use of controlled self-assembly of molecules or polymers has been limited. [6g, 10a-l] The hydrodynamic properties of solutions under microflow can be regulated in at op-down manner by varying several manually modifiable parameters (e.g.,f low rate, temperature, solventc omposition, viscosity).…”

Section: Microflow As Apotential Candidatementioning

confidence: 99%

Supramolecular Chemistry in Microflow Fields: Toward a New Material World of Precise Kinetic Control

Numata

2015

Chemistry An Asian Journal

View full text Add to dashboard Cite

Constructing new and versatile self-assembling systems in supramolecular chemistry is much like the development of new reactions or new catalysts in synthetic organic chemistry. As one such new technology, conventional supramolecular assembly systems have been combined with microflow techniques to control intermolecular or interpolymer interactions through precise regulation of a flowing self-assembly field. The potential of the microflow system has been explored by using various simple model compounds. Uniform solvent diffusion in the microflow leads to rapid activation of molecules in a nonequilibrium state and, thereby, enhanced interactions. All of these self-assembly processes begin from a temporally activated state and proceed in a uniform chemical environment, forming a synchronized cluster and resulting in effective conversion to supramolecules, with precise tuning of molecular (or polymer) interactions. This approach allows the synthesis of a variety of discrete microstructures (e.g., fibers, sheets) and unique supramolecules (e.g., hierarchical assemblies, capped fibers, polymer networks, supramolecules with time-delayed action) that have previously been inaccessible.

show abstract

Section: Microflow As Apotential Candidatementioning

confidence: 99%

Supramolecular Chemistry in Microflow Fields: Toward a New Material World of Precise Kinetic Control

Numata

2015

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…As shown in, [12][13][14][15][16][17] in addition to micelles, aqueous dispersed systems of amphiphilic calixarenes can form a dispersed phase of a different nature -molecular-water domains of hundreds of nanometers in size, consisting of molecules or ions of a solute and water structures, which usually form at concentrations of 1•10 -7 -1•10 -4 M. Domain restructuring is accompanied by non-monotonic changes in the physicochemical properties of the systems. In this case, the non-monotonic pattern of χ = f(lgC) dependence suggests the formation of domains in solutions of macrocycle 1 at concentrations below CMC.…”

Section: Methodsmentioning

confidence: 99%

Self-Organization and Physicochemical Properties of Aqueous Solutions of the Sodium Salt of Azosulphonate Calix[4]arene

Муртазина¹,

Рыжкина²,

Shevelev³

et al. 2019

MHC

View full text Add to dashboard Cite

The self-organization and physicochemical properties of aqueous solutions of the sodium salt of azosulfonate calix[4] arene (1) were studied in a wide range of concentrations 1•10-10-1•10-1 M using a complex of methods. It has been found that the solutions of macrocycle 1 are in fact complex disperse systems, the nature of disperse phase in which changes with dilutions-from micelles (CMC = 2.5•10-2 М) and premicellar aggregates (1•10-2-1•10-3 М) of the size of 1 nm to supramolecular domains (1•10-3-1•10-6 М) with sizes of tens and hundreds of nm. Jointly using the methods of dynamic light scattering and UV spectroscopy it was shown for the first time that the nonlinear character of the concentration dependence of the optical absorbance (A 360) in the concentration range 1•10-6-1.5•10-5 М is a result of the rearrangements of supramolecular domains of 1, accompanied by the transition from bi-to monomodal pattern of particles' size distribution, as well as by non-monotonic change in their size and ζ-potential. It was established that molecules of 1 are not capable of photoisomerization of the azobenzene group, which may be due to steric hindrances to the process of isomerization of closely located azoarylsulfonate groups located on one side of the plane of macrocycle 1.

show abstract

“…In the NCP, molecules reside in the ground electronic state |a> and the rotational energy distribution is that of the Boltzmann distribution. Experimental evidence for CP and NCP phases has accumulated during last decade (Kononov et al, 2015;Yinnon et al, 2009;2015a,b;2016;Elia et al, 2015;2016;). In particular, in water and other polar liquids adjacent to interfaces, stabilization of domains with properties of CD elec and CD rot have been observed.…”

Section: Discussionmentioning

confidence: 99%

Untitled

2017

WATER

View full text Add to dashboard Cite

Using a U-shaped glass tube where one arm contains bi-distilled water and the other arm ethyl alcohol (91%) separated by a platinum foil, the generated voltage across two platinum electrodes and a DC power of the order of nanoW were measured. The generated voltage lasted for many hours. The magnitude of both the voltage and power generated increased with vigorous shaking of the alcohol.Considering the absence of any significant quantity of ionic solutes in this system, voltage generation from two different polar liquids separated by a metal separator is an interesting phenomenon in the context of classical electrochemistry and seems to imply some kind of non-ionic conduction. A qualitative explanation of this phenomenon has been offered here based on the principle of Quantum Electrodynamics.

show abstract

Chemical reactivity and solution structure: on the way to a paradigm shift?

Abstract: Reagent molecules inside solution domains {R1} and {R2} cannot contact hence react. For this reason solution structure may influence chemical reactivity.

Cited by 100 publications

References 155 publications

Supramolecular Chemistry in Microflow Fields: Toward a New Material World of Precise Kinetic Control

Supramolecular Chemistry in Microflow Fields: Toward a New Material World of Precise Kinetic Control

Self-Organization and Physicochemical Properties of Aqueous Solutions of the Sodium Salt of Azosulphonate Calix[4]arene

Untitled

Contact Info

Product

Resources

About