scholarly journals Interactions of anions and cations in carbon nanotubes

2016 ◽  
Vol 193 ◽  
pp. 415-426 ◽  
Author(s):  
L. Mohammadzadeh ◽  
P. Quaino ◽  
W. Schmickler
Keyword(s):  
Carbon Nanotubes ◽  
Alkali Halide ◽  
Ion Pairs ◽  
Dimensional Chain ◽  
Image Charge ◽  
One Dimensional ◽  
Optical Branch ◽  
Pauli Repulsion ◽  
Anions And Cations ◽  
Coulomb Attraction

We consider the insertion of alkali-halide ion pairs into a narrow (5,5) carbon nanotube. In all cases considered, the insertion of a dimer is only slightly exothermic. While the image charge induced on the surface of the tube favors insertion, it simultaneously weakens the Coulomb attraction between the two ions. In addition, the anion experiences a sizable Pauli repulsion. For a one dimensional chain of NaCl embedded in the tube the most favorable position for the anion is at the center, and for the cation near the wall. The phonon spectrum of such chains shows both an acoustic and an optical branch.

scholarly journals Crystal structures and hydrogen bonding in the morpholinium salts of four phenoxyacetic acid analogues

2015 ◽  
Vol 71 (11) ◽  
pp. 1392-1396 ◽  
Author(s):  
Graham Smith ◽  
Daniel E. Lynch
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Ion Pairs ◽  
Phenoxyacetic Acid ◽  
Dimensional Chain ◽  
Hydrogen Bonding Interaction ◽  
One Dimensional ◽  
Bonding Interaction ◽  
Graph Set ◽  
Dichlorophenoxy Acetic Acid

The anhydrous salts morpholinium (tetrahydro-2-H-1,4-oxazin-4-ium) phenoxyacetate, C4H10NO+·C8H7O3−, (I), morpholinium (4-fluorophenoxy)acetate, C4H10NO+·C8H6 FO3−, (II), and isomeric morpholinium (3,5-dichlorophenoxy)acetate (3,5-D), (III), and morpholinium (2,4-dichlorophenoxy)acetic acid (2,4-D), C4H10NO+·C8H5Cl2O3−, (IV), have been determined and their hydrogen-bonded structures are described. In the crystals of (I), (III) and (IV), one of the the aminium H atoms is involved in a three-centre asymmetric cation–anion N—H...O,O′R12(4) hydrogen-bonding interaction with the two carboxyl O-atom acceptors of the anion. With the structure of (II), the primary N—H...O interaction is linear. In the structures of (I), (II) and (III), the second N—H...Ocarboxylhydrogen bond generates one-dimensional chain structures extending in all cases along [100]. With (IV), the ion pairs are linked though inversion-related N—H...O hydrogen bonds [graph setR42(8)], giving a cyclic heterotetrameric structure.

{2-[2-(Ethylamino)ethyliminomethyl]phenol}{2-[2-(ethylamino)ethyliminomethyl]phenolato}nickel(II) perchlorate

2006 ◽  
Vol 62 (7) ◽  
pp. m1498-m1500 ◽  
Author(s):  
Zhong-Lu You ◽  
Jing-Yun Chi
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Ion Pairs ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
One Dimensional ◽  
Distorted Octahedral ◽  
Anions And Cations

In the title structure, [Ni(C11H15N2O)(C11H16N2O)]ClO4, there are two independent ion pairs in the asymmetric unit. In each cation, the NiII atom is six-coordinated in a slightly distorted octahedral geometry by two phenolate O atoms, two imine N atoms and two amine N atoms from two Schiff base ligands, in one of which the phenolate O atom is protonated. In the crystal structure, anions and cations are linked through intermolecular O—H...O, N—H...O and weak C—H...O hydrogen bonds, forming one-dimensional chains containing hydrogen-bonded cation dimers.

Bis[4-(dimethylamino)pyridinium] bis(1,2-dicyanoethene-1,2-dithiolato-κ2 S,S′)cuprate(II)

2006 ◽  
Vol 62 (5) ◽  
pp. m1119-m1121
Author(s):  
H. Zhou ◽  
X.-M. Ren
Keyword(s):  
Hydrogen Bonding ◽  
Chain Structure ◽  
Planar Geometry ◽  
Dimensional Chain ◽  
One Dimensional ◽  
Hydrogen Bonding Interactions ◽  
Square Planar ◽  
Anions And Cations

In the title salt (C7H11N2)2[Cu(C4N2S2)2], the Cu2+ ion is coordinated by four S atoms of two 1,2-dicyanoethene-1,2-dithiolate (or maleonitriledithiolate, mnt2−) ligands in an approximate square-planar geometry. The Cu atom is located on an inversion centre. Strong hydrogen-bonding interactions between the pyridinium proton and the CN groups of the mnt2− ligand link anions and cations into a one-dimensional chain structure.

Synergistic effect of carbon nanotubes and graphitic carbon nitride on the enhanced supercapacitor performance of cobalt diselenide-based composites

2021 ◽  
Author(s):  
Mingjie Li ◽  
Xuan Zheng ◽  
Xiang Li ◽  
Youjun Yu ◽  
Jinlong Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Synergistic Effect ◽  
Hydrothermal Method ◽  
High Performance ◽  
Carbon Nitride ◽  
Electrode Materials ◽  
One Dimensional ◽  
Supercapacitor Performance ◽  
Metal Selenides

Recently, transition metal selenides have been investigated extensively as promising electrode materials for high-performance supercapacitors. Herein, the multi-component CoSe2/CNTs@g-C3N4 composites are prepared using a two-step hydrothermal method by incorporating one-dimensional...

scholarly journals Gate-tunable plasmons in mixed-dimensional van der Waals heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sheng Wang ◽  
SeokJae Yoo ◽  
Sihan Zhao ◽  
Wenyu Zhao ◽  
Salman Kahn ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carrier Density ◽  
Electromagnetic Interaction ◽  
Luttinger Liquid ◽  
Fundamental Physics ◽  
Metallic Structures ◽  
One Dimensional ◽  
Figures Of Merit ◽  
Electrostatic Gating ◽  
Plasmon Dispersion

AbstractSurface plasmons, collective electromagnetic excitations coupled to conduction electron oscillations, enable the manipulation of light–matter interactions at the nanoscale. Plasmon dispersion of metallic structures depends sensitively on their dimensionality and has been intensively studied for fundamental physics as well as applied technologies. Here, we report possible evidence for gate-tunable hybrid plasmons from the dimensionally mixed coupling between one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene. In contrast to the carrier density-independent 1D Luttinger liquid plasmons in bare metallic carbon nanotubes, plasmon wavelengths in the 1D-2D heterostructure are modulated by 75% via electrostatic gating while retaining the high figures of merit of 1D plasmons. We propose a theoretical model to describe the electromagnetic interaction between plasmons in nanotubes and graphene, suggesting plasmon hybridization as a possible origin for the observed large plasmon modulation. The mixed-dimensional plasmonic heterostructures may enable diverse designs of tunable plasmonic nanodevices.

A new one-dimensional CdIIcoordination polymer with a two-dimensional layered structure incorporating 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole and benzene-1,2-dicarboxylate ligands

2016 ◽  
Vol 72 (6) ◽  
pp. 480-484 ◽  
Author(s):  
Qiu-Ying Huang ◽  
Xiao-Yi Lin ◽  
Xiang-Ru Meng
Keyword(s):  
Layered Structure ◽  
Room Temperature ◽  
Weak Interactions ◽  
Coordination Geometry ◽  
Dimensional Chain ◽  
Two Dimensional ◽  
One Dimensional ◽  
Heterocyclic Ligand ◽  
Rich Variety ◽  
Solvent Molecules

The N-heterocyclic ligand 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole (imb) has a rich variety of coordination modes and can lead to polymers with intriguing structures and interesting properties. In the coordination polymercatena-poly[[cadmium(II)-bis[μ-benzene-1,2-dicarboxylato-κ4O1,O1′:O2,O2′]-cadmium(II)-bis{μ-2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole}-κ2N2:N3;κ2N3:N2] dimethylformamide disolvate], {[Cd(C8H4O4)(C11H10N4)]·C3H7NO}n, (I), each CdIIion exhibits an irregular octahedral CdO4N2coordination geometry and is coordinated by four O atoms from two symmetry-related benzene-1,2-dicarboxylate (1,2-bdic2−) ligands and two N atoms from two symmetry-related imb ligands. Two CdIIions are connected by two benzene-1,2-dicarboxylate ligands to generate a binuclear [Cd2(1,2-bdic)2] unit. The binuclear units are further connected into a one-dimensional chain by pairs of bridging imb ligands. These one-dimensional chains are further connected through N—H...O hydrogen bonds and π–π interactions, leading to a two-dimensional layered structure. The dimethylformamide solvent molecules are organized in dimeric pairsviaweak interactions. In addition, the title polymer exhibits good fluorescence properties in the solid state at room temperature.

scholarly journals The magneto-elastica : from self-buckling to self-assembly

2014 ◽  
Vol 470 (2162) ◽  
pp. 20130609 ◽  
Author(s):  
Dominic Vella ◽  
Emmanuel du Pontavice ◽  
Cameron L. Hall ◽  
Alain Goriely
Keyword(s):  
Self Assembly ◽  
Permanent Magnets ◽  
Energy Estimates ◽  
Dimensional Chain ◽  
Elastic Rod ◽  
Straight Chain ◽  
One Dimensional ◽  
Vibration Dynamics ◽  
Magnetic Strength ◽  
A Chain

Spherical neodymium–iron–boron magnets are permanent magnets that can be assembled into a variety of structures owing to their high magnetic strength. A one-dimensional chain of these magnets responds to mechanical loadings in a manner reminiscent of an elastic rod. We investigate the macroscopic mechanical properties of assemblies of ferromagnetic spheres by considering chains, rings and chiral cylinders of magnets. Based on energy estimates and simple experiments, we introduce an effective magnetic bending stiffness for a chain of magnets and show that, used in conjunction with classic results for elastic rods, it provides excellent estimates for the buckling and vibration dynamics of magnetic chains. We then use this estimate to understand the dynamic self-assembly of a cylinder from an initially straight chain of magnets.

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