scholarly journals Aqueous microgels modified with photosensitive wedge-shaped amphiphilic molecules: synthesis, structure and photochemical behaviour

2019 ◽  
Vol 18 (7) ◽  
pp. 1709-1715 ◽  
Author(s):  
Andrey V. Dolgopolov ◽  
Kseniia N. Grafskaia ◽  
Polina V. Bovsunovskaya ◽  
Elina R. Melnikova ◽  
Dimitri A. Ivanov ◽  
...  
Keyword(s):  
Amphiphilic Molecules ◽  
Photochemical Behaviour

Hydrophobic “pockets” in aqueous microgels act as a spectroscopic and kinetic probe sensing the microenvironment inside the particles.

The Effect of the Concentration of Non-ionic Surfactant Amphiphilic Molecules on the Structure and Gelation in Aqueous Dispersions

2020 ◽  
Vol 65 (9) ◽  
pp. 1475-1483
Author(s):  
S. A. Alekseeva ◽  
I. V. Baranets ◽  
V. N. Beresnev ◽  
T. A. Nadervel ◽  
A. D. Kryuchkov ◽  
...  
Keyword(s):  
Ionic Surfactant ◽  
Aqueous Dispersions ◽  
Amphiphilic Molecules

Stimuli-Responsive Supramolecular Chirality Switching and Nanoassembly Constructed by n-Shaped Amphiphilic Molecules in Aqueous Solution

Langmuir ◽  
2021 ◽  
Vol 37 (3) ◽  
pp. 1215-1224
Author(s):  
Yuntian Yang ◽  
Qingqing Han ◽  
Yi-rong Pei ◽  
Shengsheng Yu ◽  
Zhegang Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Stimuli Responsive ◽  
Supramolecular Chirality ◽  
Amphiphilic Molecules

scholarly journals Formation of Amphiphilic Molecules from the Most Common Marine Polysaccharides, toward a Sustainable Alternative?

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4445
Author(s):  
Tiphaine Wong ◽  
Lorette Brault ◽  
Eric Gasparotto ◽  
Romuald Vallée ◽  
Pierre-Yves Morvan ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Carboxylic Acid ◽  
Bioactive Compounds ◽  
Biological Properties ◽  
Cross Linking ◽  
Structural Modifications ◽  
Chemical Structures ◽  
Amphiphilic Molecules

Marine polysaccharides are part of the huge seaweeds resources and present many applications for several industries. In order to widen their potential as additives or bioactive compounds, some structural modifications have been studied. Among them, simple hydrophobization reactions have been developed in order to yield to grafted polysaccharides bearing acyl-, aryl-, alkyl-, and alkenyl-groups or fatty acid chains. The resulting polymers are able to present modified physicochemical and/or biological properties of interest in the current pharmaceutical, cosmetics, or food fields. This review covers the chemical structures of the main marine polysaccharides, and then focuses on their structural modifications, and especially on hydrophobization reactions mainly esterification, acylation, alkylation, amidation, or even cross-linking reaction on native hydroxyl-, amine, or carboxylic acid functions. Finally, the question of the necessary requirement for more sustainable processes around these structural modulations of marine polysaccharides is addressed, considering the development of greener technologies applied to traditional polysaccharides.

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.

Synthesis and photochemical behaviour of novel uranyl–salophen complexes bearing anthracenyl side arms

2013 ◽  
Vol 25 (2) ◽  
pp. 109-115 ◽  
Author(s):  
Francesco Yafteh Mihan ◽  
Silvia Bartocci ◽  
Alberto Credi ◽  
Serena Silvi ◽  
Antonella Dalla Cort
Keyword(s):  
Photochemical Behaviour

Localization of transmembrane multiblock amphiphilic molecules in phase-separated vesicles

2018 ◽  
Vol 209 ◽  
pp. 315-328 ◽  
Author(s):  
Kazushi Kinbara ◽  
Kaori Umetsu ◽  
Hiroki Sonobe ◽  
Takahiro Muraoka ◽  
Naofumi Shimokawa ◽  
...  
Keyword(s):  
Amphiphilic Molecules

Multiblock-amphiphiles preferentially distribute in the Ld phase and encourage delocalization of cholesterol in both the Ld and Lo phases.

Distribution of Some Selected Surface Active Agents (SAAs) in the Aquatic and Global Environment with Their Toxic Impact: A Comprehensive Review

2020 ◽  
Vol 33 (1) ◽  
pp. 31-46
Author(s):  
Ramsingh Kurrey ◽  
Anushree Saha ◽  
Manas Kanti Deb
Keyword(s):  
Surface Waters ◽  
Anaerobic Degradation ◽  
River Waters ◽  
Toxic Impact ◽  
Amphiphilic Molecules ◽  
Surface Active Agents ◽  
Soils And Sediments ◽  
Surface Active ◽  
Soil Sediments ◽  
Dispersing Agents

Surface active agents (SAAs) are a class of compounds, which find various applications in different fields of human activities. Surfactants are generally amphiphilic molecules, which are strongly adsorbed at interfaces between the phases. Surfactants windily used as detergency, emulsion, stabilizing and dispersing agents have led to the discharge of highly contaminated wastewaters in aquatic environment. Once reached in the various compartments of the environment such as rivers, lakes, soils, and sediments, surfactants can undergo aerobic or anaerobic degradation. Concentrations of surfactants in wastewaters, river waters, and sewage waters can range milligrams in maximum cases, while it reaches several grams in sludge, soil and sediments in environments. The environmental facts of SAAs and concentration in surface waters, soils or sediments are reviewed in details. This review provides information on levels of surface-active agents in various environmental samples including soil, sediments, sewage wastewater, river wastewater and aerosols.

Sign in / Sign up

Export Citation Format

Share Document