Self-assembled rhomboidal ammonia monolayer confined in two vertically stacked graphene oxide/graphene nanosheets

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhi-Bin Jian ◽  
Jie Bie ◽  
Shuang Chen
Keyword(s):  
Graphene Oxide ◽  
Graphene Nanosheets ◽  
Research Interest ◽  
Water Molecules ◽  
Confined Water ◽  
Self Assembled ◽  
Phase Behaviors ◽  
Hydrogen Bonded

Confined water molecules have attracted widespread research interest due to its versatile phase behaviors. Ammonia (NH3, isoelectronic with water) molecules are also expected to realize the delicate self-assembled hydrogen-bonded network...

scholarly journals Molecular insights on confined water in the nanochannels of self-assembled ionic liquid crystal

2021 ◽  
Vol 7 (31) ◽  
pp. eabf0669
Author(s):  
Yoshiki Ishii ◽  
Nobuyuki Matubayasi ◽  
Go Watanabe ◽  
Takashi Kato ◽  
Hitoshi Washizu
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquid ◽  
Water Transport ◽  
Density Functional ◽  
Large Scale ◽  
The Self ◽  
Water Molecules ◽  
Diffraction Measurement ◽  
Confined Water ◽  
Self Assembled

Self-assembled ionic liquid crystals can transport water and ions via the periodic nanochannels, and these materials are promising candidates as water treatment membranes. Molecular insights on the water transport process are, however, less investigated because of computational difficulties of ionic soft matters and the self-assembly. Here we report specific behavior of water molecules in the nanochannels by using the self-consistent modeling combining density functional theory and molecular dynamics and the large-scale molecular dynamics calculation. The simulations clearly provide the one-dimensional (1D) and 3D-interconnected nanochannels of self-assembled columnar and bicontinuous structures, respectively, with the precise mesoscale order observed by x-ray diffraction measurement. Water molecules are then confined inside the nanochannels with the formation of hydrogen bonding network. The quantitative analyses of free energetics and anisotropic diffusivity reveal that, the mesoscale geometry of 1D nanodomain profits the nature of water transport via advantages of dissolution and diffusion mechanisms inside the ionic nanochannels.

One-dimensional Hydrogen-bonded Chloride-Hydrate Assembly {[(H2O)4Cl2]2–}∞

2007 ◽  
Vol 62 (4) ◽  
pp. 491-494 ◽  
Author(s):  
Ji-Xiang Dai ◽  
Fang-Hui Wu ◽  
Wen-Rui Yao ◽  
Qian-Feng Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Bond Length ◽  
Chloride Ions ◽  
Water Molecules ◽  
One Dimensional ◽  
Self Assembled ◽  
Chloride Hydrate ◽  
Hydrogen Bonded

A hydrogen-bonded chloride-hydrate assembly {[(H2O)4Cl2]2−}∞ has been ion-countered by the complex cations [Fe([9]aneS3)2]2+ ([9]aneS3 = 1,4,7-trithiacyclononane). In {[(H2O)4Cl2]2−}∞, four water molecules and two chloride ions are self-assembled to form a one-dimensional supramolecular array of O-H···O and O-H···Cl hydrogen bonding, which consists of fused fourand six-membered rings. The discrete cation [Fe([9]aneS3)2]2+ has a nearly regular octahedral FeS6 core with an average Fe-S bond length of 2.2586(5) Å .

Effect of Confinement on the Freezing-Melting Dynamics of Water

2006 ◽  
Vol 514-516 ◽  
pp. 1255-1259 ◽  
Author(s):  
Juras Banys ◽  
Martynas Kinka ◽  
Jan Macutkevic ◽  
Georg Völkel ◽  
Winfried Böhlmann ◽  
...  
Keyword(s):  
Dielectric Spectroscopy ◽  
Spectroscopy Method ◽  
Water Molecules ◽  
Pore Surface ◽  
Confined Water ◽  
Melting Dynamics ◽  
Mcm 41 ◽  
Hydrogen Bonded

Melting-freezing dynamics of water confined in three MCM-41 materials with pore diameters of 2.0 nm, 2.5 nm and 3.7 nm was analyzed using dielectric spectroscopy method. Obtained results show, that reorientation of water molecules is strongly affected by confinement and interaction with the pore surface, which leads to the formation of highly disordered hydrogen bonded network. Defects of this network play the key role in the overall relaxation of confined water.

scholarly journals High Electrical Anisotropic Multilayered Self‐Assembled Organic Films Based on Graphene Oxide and PEDOT:PSS (Adv. Electron. Mater. 8/2021)

2021 ◽  
Vol 7 (8) ◽  
pp. 2170033
Author(s):  
Gabriel Gaál ◽  
Maria Luisa Braunger ◽  
Varlei Rodrigues ◽  
Antonio Riul ◽  
Henrique Leonel Gomes
Keyword(s):  
Graphene Oxide ◽  
Organic Films ◽  
Self Assembled

scholarly journals Self-assembled albumin decorated MoS2 aggregates and photo-stimuli induced geometrical switching for enhanced theranostics applications

2020 ◽  
Vol 1 (8) ◽  
pp. 3000-3008
Author(s):  
Lakshmi Narashimhan Ramana ◽  
Rajeev J. Mudakavi ◽  
Ashok M. Raichur
Keyword(s):  
Graphene Oxide ◽  
2D Materials ◽  
Molybdenum Sulfide ◽  
Self Assembled

2D materials such as graphene oxide and molybdenum sulfide exhibit certain properties such as photoluminescence, photothermal and photodynamic effects that have potential in diagnosing and treating cancer.

scholarly journals Cyclooctanaminium hydrogen succinate monohydrate

2012 ◽  
Vol 68 (4) ◽  
pp. o1204-o1204 ◽  
Author(s):  
Sanaz Khorasani ◽  
Manuel A. Fernandes
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Ammonium Cation ◽  
Water Molecules ◽  
Hydrated Salt ◽  
A Chain ◽  
Hydrogen Bonded

In the title hydrated salt, C8H18N+·C4H5O4−·H2O, the cyclooctyl ring of the cation is disordered over two positions in a 0.833 (3):0.167 (3) ratio. The structure contains various O—H.·O and N—H...O interactions, forming a hydrogen-bonded layer of molecules perpendicular to thecaxis. In each layer, the ammonium cation hydrogen bonds to two hydrogen succinate anions and one water molecule. Each hydrogen succinate anion hydrogen bonds to neighbouring anions, forming a chain of molecules along thebaxis. In addition, each hydrogen succinate anion hydrogen bonds to two water molecules and the ammonium cation.

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