scholarly journals In situ modification of nanostructure configuration through the manipulation of hydrogen bonded amphiphile self-association

Soft Matter ◽  
2016 ◽  
Vol 12 (18) ◽  
pp. 4221-4228 ◽  
Author(s):  
Jennifer R. Hiscock ◽  
Gianluca P. Bustone ◽  
Ben Wilson ◽  
Kate E. Belsey ◽  
Laura R. Blackholly
Keyword(s):  
Hydrogen Bond ◽  
Nanostructure Formation ◽  
In Situ Modification ◽  
Self Association ◽  
Hydrogen Bonded

Previously overlooked simple amphiphiles show an exciting capacity for complex hydrogen bond mediated self-association and diverse nanostructure formation.

Hydrogen bonded interactions of methanol and water with purines and pyrimidines

1983 ◽  
Vol 61 (12) ◽  
pp. 2695-2698 ◽  
Author(s):  
J. N. Spencer ◽  
S. W. Barton ◽  
K. A. Smith ◽  
W. S. Wolbach ◽  
J. F. Powell ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Bond Formation ◽  
Intermolecular Hydrogen Bond ◽  
Solvation Shell ◽  
The Self ◽  
Hydrogen Bond Formation ◽  
Interaction Site ◽  
Self Association ◽  
Purines And Pyrimidines ◽  
Hydrogen Bonded

The solvation of benzimidazole, 4-azabenzimidazole, purine, adenine, uracil, thymine, and cytosine in water and methanol was determined by a combination of calorimetric and spectral analysis. Specific enthalpies have been assigned to each interaction site in the first solvation shell. Calculations, based on the enthalpies of hydrogen bond formation with water, and estimates for intermolecular hydrogen bond enthalpies, show that the self-association of purine and adenine in water through hydrogen bonded interactions is enthalpically possible.

Hydrogen-bond self-assembly of DNA-base analogues — Experimental results

2009 ◽  
Vol 87 (5) ◽  
pp. 627-639 ◽  
Author(s):  
Felaniaina Rakotondradany ◽  
Hanadi Sleiman ◽  
M. A. Whitehead
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Cyanuric Acid ◽  
Experimental Studies ◽  
Acid Complex ◽  
Hybridization Probes ◽  
Dna Strands ◽  
Artificial Dna ◽  
Self Association ◽  
Hydrogen Bonded

A novel biomimetic DNA analogue with fluorescence has been synthesized to generate functional supramolecular architectures. Experimental studies show that triaminopyrimidine nucleoside (2) undergoes a sterically controlled self-assembly into hydrogen-bonded linear tapes and hexameric rosettes. Self-association of the hydrogen-bonded triaminopyrimidine–cyanuric acid complex into elongated, rodlike nanostructures was shown by dynamic light scattering and transmission electron microscopy, suggesting hierarchical formation of higher-order, π-stacked assemblies. The hydrogen-bond self-assembly of the DNA analogue decreased the fluorescence of the nucleosides. This guest-induced fluorescence quenching can be used to develop DNA-hybridization probes. MM+ molecular modelling and semi-empirical molecular orbital PM3 calculations (1) predicted the incorporation of triaminopyrimidine nucleoside into new types of artificial DNA strands and triplex formation with natural, complementary DNA strands containing thymine (1).

In-situ Modification of Graphene Oxide by Insoluble Sulfur and Application for Nitrile Butadiene Rubber

2020 ◽  
Vol 35 (2) ◽  
pp. 221-228
Author(s):  
S.-B. Chen ◽  
T.-X. Li ◽  
S.-H. Wan ◽  
X. Huang ◽  
S.-W. Cai ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
In Situ Modification

scholarly journals Seawater Absorption and Adhesion Properties of Hydrophobic and Superhydrophobic Thermoset Epoxy Nanocomposite Coatings

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 272
Author(s):  
Ayman M. Atta ◽  
Mohamed H. El-Newehy ◽  
Meera Moydeen Abdulhameed ◽  
Mohamed H. Wahby ◽  
Ahmed I. Hashem
Keyword(s):  
Thermal Stability ◽  
Oleic Acid ◽  
Salt Spray ◽  
Adhesion Properties ◽  
In Situ Modification ◽  
Long Time ◽  
Seawater Environment ◽  
Thermoset Epoxy ◽  
The Cost

The enhancement of both thermal and mechanical properties of epoxy materials using nanomaterials becomes a target in coating of the steel to protect it from aggressive environmental conditions for a long time, with reducing the cost. In this respect, the adhesion properties of the epoxy with the steel surfaces, and its proper superhyrophobicity to repel the seawater humidity, can be optimized via addition of green nanoparticles (NPs). In-situ modification of silver (Ag) and calcium carbonate (CaCO3) NPs with oleic acid (OA) was carried out during the formation of Ag−OA and CaCO3−OA, respectively. The epoxide oleic acid (EOA) was also used as capping for Ca−O3 NPs by in-situ method and epoxidation of Ag−OA NPs, too. The morphology, thermal stability, and the diameters of NPs, as well as their dispersion in organic solvent, were investigated. The effects of the prepared NPs on the exothermic curing of the epoxy resins in the presence of polyamines, flexibility or rigidity of epoxy coatings, wettability, and coatings durability in aggressive seawater environment were studied. The obtained results confirmed that the proper superhyrophobicity, coating adhesion, and thermal stability of the epoxy were improved after exposure to salt spray fog for 2000 h at 36 °C.

Molecular Tectonics. Disruption of Self-Association in Melts Derived from Hydrogen-Bonded Solids

2004 ◽  
Vol 37 (19) ◽  
pp. 7351-7357 ◽  
Author(s):  
Danielle Boils ◽  
Marie-Ève Perron ◽  
Francis Monchamp ◽  
Hugues Duval ◽  
Thierry Maris ◽  
...  
Keyword(s):  
Molecular Tectonics ◽  
Self Association ◽  
Hydrogen Bonded

Enantio-Differentiating Hydrogenation of 2-Octanone over Modified Nickel Catalysts Prepared by an In Situ Modification

2002 ◽  
Vol 75 (12) ◽  
pp. 2695-2696 ◽  
Author(s):  
Tsutomu Osawa ◽  
Nobuyo Ozaki ◽  
Tadao Harada ◽  
Osamu Takayasu
Keyword(s):  
Nickel Catalysts ◽  
In Situ Modification

Nanostructure Growth Supported by In Situ RHEED Evaluation

2017 ◽  
Vol 885 ◽  
pp. 234-238
Author(s):  
Péter Kucsera ◽  
Tamás Sándor ◽  
Gusztáv Varga Tényi ◽  
Márton Csutorás ◽  
Gergely Bátori ◽  
...  
Keyword(s):  
Growth Kinetics ◽  
In Situ Monitoring ◽  
Nanostructure Formation

The in-situ monitoring of the MBE grown nanostructures can be carried out using the RHEED method. During the droplet epitaxal growth, the observation of the nanostructure formation is very important to understand the growth kinetics. In the present work, a novel in-situ RHEED evaluation and further MBE related developments are introduced, with which the quality of the nanostructure preparation can be improved.

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