Effect of slight structural changes on the gelation properties of N-phenylstearamide supramolecular gels

Soft Matter ◽  
2018 ◽  
Vol 14 (32) ◽  
pp. 6716-6727 ◽  
Author(s):  
Alexandre R. Meyer ◽  
Caroline R. Bender ◽  
Daniel M. dos Santos ◽  
Francieli I. Ziembowicz ◽  
Clarissa P. Frizzo ◽  
...  
Keyword(s):  
Structural Changes ◽  
Test Tube ◽  
Gel Properties ◽  
Supramolecular Gel ◽  
H Nmr ◽  
Supramolecular Gels

The effect of slight structural changes on several supramolecular gel properties were evaluated by the test tube method, UV-Vis, 1H NMR, rheology and DSC experiments.

scholarly journals Anion-tuning of supramolecular gel properties

2009 ◽  
Vol 1 (6) ◽  
pp. 437-442 ◽  
Author(s):  
Gareth O. Lloyd ◽  
Jonathan W. Steed
Keyword(s):  
Gel Properties ◽  
Supramolecular Gel

Influence of Dodecyltrimethylammonium Halides on Interaction of Phenyltin Compounds with Model Membranes

2001 ◽  
Vol 56 (7-8) ◽  
pp. 623-628
Author(s):  
Bożenna Różycka-Roszak ◽  
Hanna Pruchnik
Keyword(s):  
Phase Formation ◽  
Nmr Spectra ◽  
Structural Changes ◽  
Hexagonal Phase ◽  
Model Membranes ◽  
Phase Behaviour ◽  
Dodecyltrimethylammonium Bromide ◽  
H Nmr ◽  
Dodecyltrimethylammonium Chloride ◽  
Triphenyltin Chloride

The effects were studied of dodecyltrimethylammonium chloride (DTAC), dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium iodide (DTAI) on thermo­tropic phase behaviour of phosphatidylcholine bilayers, as well as on 1H NMR and 31P NMR spectra, in the presence of diphenyltin dichloride (DPhT) and triphenyltin chloride (TPhT). The obtained results indicate that in the presence of the surfactant studied the interaction of phenyltin compounds with model membranes was changed and the changes depended on the kind of the counterion. The surfactants studied (especially DTAC) decrease the ability of phenyltin compounds to induce structural changes in the bilayer. It is suggested that DTAB, and especially DTAC, prevent DPhT induced interdigitated phase formation as well as formation of an inverted hexagonal phase (HII) in the case of TPhT/DPPC liposomes

Functional supramolecular gels based on pillar[n]arene macrocycles

Nanoscale ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 2180-2200 ◽  
Author(s):  
Yong-Fu Li ◽  
Zheng Li ◽  
Qi Lin ◽  
Ying-Wei Yang
Keyword(s):  
Supramolecular Gel ◽  
Supramolecular Gels ◽  
Recent Developments

Recent developments of functional supramolecular gel materials constructed from pillararenes have been overviewed.

Photoresponsive supramolecular gels based on amphiphiles with azobenzene and maltose or polyethyleneglycol polar head

2015 ◽  
Vol 39 (5) ◽  
pp. 4009-4019 ◽  
Author(s):  
María José Clemente ◽  
Rosa María Tejedor ◽  
Pilar Romero ◽  
Juliette Fitremann ◽  
Luis Oriol
Keyword(s):  
External Stimulus ◽  
Gel Structure ◽  
Supramolecular Gel ◽  
Polar Head ◽  
Supramolecular Gels ◽  
Reversible Gel

Photoresponsive supramolecular gelators have been synthesized using PEG or d-maltose as polar head. Incorporation of azobenzene photoresponsive moieties allows controlling the supramolecular gel structure, including a reversible gel–sol transition using light as external stimulus.

scholarly journals Annealing multicomponent supramolecular gels

Nanoscale ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 3275-3280 ◽  
Author(s):  
Ana M. Fuentes-Caparrós ◽  
Francisco de Paula Gómez-Franco ◽  
Bart Dietrich ◽  
Claire Wilson ◽  
Christopher Brasnett ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Supramolecular Gel ◽  
Two Component ◽  
Supramolecular Gels

Annealing in a two-component supramolecular gel leads to a self-sorted network, which has significantly different mechanical properties to the as-prepared gels.

Exploring Dynamics and Stereochemistry in Mechanically-Interlocked Compounds

2005 ◽  
Vol 70 (10) ◽  
pp. 1493-1576 ◽  
Author(s):  
Scott A. Vignon ◽  
J. Fraser Stoddart
Keyword(s):  
Self Assembly ◽  
Structural Changes ◽  
Variable Temperature ◽  
Molecular Switches ◽  
Dynamic Processes ◽  
Condensed Phases ◽  
H Nmr ◽  
Structural Types ◽  
Solution Dynamics ◽  
Stereochemical Properties

The advent of self-assembly and template-directed synthetic protocols has led to a tremendous surge in the number of mechanically-interlocked compounds being prepared and studied. As these investigations are being carried out, it is becoming increasingly apparent that many of these compounds, known as catenanes and rotaxanes, possess unique dynamic and stereochemical properties. In addition, the drive to create molecular switches and machines for nanotechnological applications has generated a need to understand how to control those properties in condensed phases. Here, we present an overview of the field with regard to the solution dynamics and stereochemistry of mechanically-interlocked compounds - as well as to some related structural types - and review the recent results from our own research in some detail. 1H NMR spectroscopy has proven to be a powerful tool for probing both degenerate and nondegenerate dynamic processes in these compounds, as well as for identifying stereoisomers if they are present in solution. The results of several variable temperature NMR investigations on the effects of structural changes upon the dynamic processes and stimulated relative motions of components in catenanes and rotaxanes, as well as in some self-complexes and pretzelanes, are discussed. A review with 90 references.

scholarly journals Surface-directed modulation of supramolecular gel properties

2016 ◽  
Vol 52 (23) ◽  
pp. 4298-4300 ◽  
Author(s):  
Maria Galini Faidra Angelerou ◽  
Akmal Sabri ◽  
Rhiannon Creasey ◽  
Polyxeni Angelerou ◽  
Maria Marlow ◽  
...  
Keyword(s):  
Surface Properties ◽  
Gel Properties ◽  
Supramolecular Gel ◽  
Self Assembled

Surface properties directly affect fibre architecture and stiffness of self-assembled cytidine based gel films.

scholarly journals Responsive aggregation-induced emissive supramolecular gels based on bis-cyanostilbene derivatives

2016 ◽  
Vol 4 (46) ◽  
pp. 10786-10790 ◽  
Author(s):  
Yao Ma ◽  
Massimo Cametti ◽  
Zoran Džolić ◽  
Shimei Jiang
Keyword(s):  
Supramolecular Gel ◽  
Supramolecular Gels

A novel π-conjugated AIE supramolecular gel reversibly responds to light and, selectively, to TFA vapor through a gel-to-sol transformation.

A crown-ether-based moldable supramolecular gel with unusual mechanical properties and controllable electrical conductivity prepared by cation-mediated cross-linking

2018 ◽  
Vol 9 (28) ◽  
pp. 3900-3907 ◽  
Author(s):  
Jaehyeon Park ◽  
Ka Young Kim ◽  
Chaelin Kim ◽  
Ji Ha Lee ◽  
Ju Hyun Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Crown Ether ◽  
Cross Linking ◽  
Supramolecular Gel ◽  
Supramolecular Gels

Supramolecular gels that possess high mechanical properties and unusual electrical conductivity were prepared by incorporating Cs+.

Preparation of 6-amino-6-deoxy-D-altronic acid and their derivatives

1986 ◽  
Vol 51 (2) ◽  
pp. 391-400 ◽  
Author(s):  
Karel Kefurt ◽  
Karel Čapek ◽  
Zdeňka Kefurtová ◽  
Jiří Jarý
Keyword(s):  
Amino Acid ◽  
Alkaline Hydrolysis ◽  
Nmr Spectra ◽  
Structural Changes ◽  
Catalytic Reduction ◽  
Isopropylidene Derivative ◽  
H Nmr

Methyl 6-azido-3,5-di-O-benzoyl-6-deoxy-α- and -β-D-glucofuranosides (IIIandIV), obtained by methanolysis of 1,2-O-isopropylidene derivative II were converted via 2-O-methanesulfonyl esters V and VI to methyl 2,3-anhydro-6-azido-6-deoxy-α- and -β-D-mannofuranosides (VII or VIII, respectively). Epoxide VII when submitted to alkaline hydrolysis gave methyl 6-azido-6-deoxy-α-D-altrofuranoside (IX) exclusively, while epoxide VIII afforded a mixture of methyl 6-azido-6-deoxy-β-D-furanosides of altro (X) and gluco(XI) configuration in a 5 : 4 ratio. Altrofuranosides IX and X were converted to 6-azido-6-deoxy-D-altrose (XII) the oxidation of which with bromine and catalytic reduction with hydrogen afforded amorphous amino acid XIV, characterized as its tetraacetyllactam XVI. The structural changes of the compounds from individual steps of the synthesis were checked by IR and 1H NMR spectra which are discussed.

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