Crystal structure and Hirshfeld surface analysis of (E)-N-[(2-ethoxynaphthalen-1-yl)methylidene]-5,6,7,8-tetrahydronaphthalen-1-amine. Corrigendum

In the paper by Kansiz et al. [Acta Cryst. (2018), E74, 1513–1516], the address of the correspondence author is incorrect

Crystal structure and Hirshfeld surface analysis of (E)-N-[(2-ethoxynaphthalen-1-yl)methylidene]-5,6,7,8-tetrahydronaphthalen-1-amine

In the title Schiff base compound, C23H23NO, the two ring systems are twisted by 51.40 (11)° relative to each other. In the crystal, the molecules are connected by weak C—H...π interactions, generating a three-dimensional supramolecular structure. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (67.2%), C...H/H...C (26.7%) and C...C (2.5%) interactions

Crystal structure and Hirshfeld surface analysis and of 2-ammoniumylmethyl-1H-benzimidazol-3-ium chloride monohydrate. Corrigendum

In the paper by Sen et al. [Acta Cryst. (2018), E74, 1517–1520], the address of the correspondence author is incorrect

Crystal structure and Hirshfeld surface analysis of N,N′-[ethane-1,2-diylbis(oxy)]bis(4-methylbenzenesulfonamide)

In the molecule of the title compound, C16H20N2O6S2, the mid-point of the C—C bond of the central ethane moiety is located on a twofold rotation axis. In the crystal, molecules are linked by N—H...O hydrogen bonds into supramolecular chains propagating along the [101] direction. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (43.1%), O...H/H...O (40.9%), C...H/H...C (8.8%) and C...C (5.5%) interactions

Crystal structure and Hirshfeld surface analysis and of 2-ammoniumylmethyl-1H-benzimidazol-3-ium chloride monohydrate

The asymmetric unit of the title compound, C8H11N32+·2Cl−·H2O, contains three organic cations, six chloride anions and three water molecules of crystallization, which are connected by extensive hydrogen-bonding interactions into a three-dimensional supramolecular architecture. Hirshfeld surface analysis and two-dimensional fingerprint plots indicate that the most important contributions to the crystal packing are from H...H (37.4%), Cl...H/H...Cl (35.5%), C...H/H...C (9.5%) and C...C (6.9%) interactions

Crystal structure of poly[bis(μ-2-bromopyrazine)tetra-μ2-cyanido-dicopper(I)iron(II)]: a bimetallic metal-organic framework

In the title metal-organic framework, [Fe(C4H3BrN2)2{Cu(CN)2}2]n, the FeII cation is located on an inversion center and has a slightly elongated octahedral coordination environment [FeN6], ligated by two pyrazine N atoms of symmetry-related bridging 2-bromopyrazine molecules in the axial positions and by four N atoms of pairs of symmetry-related cyanido groups in the equatorial positions. The CuI center has a fourfold coordination environment [CuC3N], with an almost perfect trigonal–pyramidal geometry, formed by three cyanido C atoms and an N atom of a bridging 2-bromopyrazine molecule. Copper(I) centers related by a twofold rotation axis are bridged by two carbon atoms from a pair of μ-CN groups, resulting in Cu2(CN)2 units. Each Cu2(CN)2 unit is linked to six FeII cations via a pair of linear CN units, the pair of μ-CN groups and two bridging 2-bromopyrazine ligands, resulting in the formation of a metal–organic framework, which is additionally stabilized by the short Cu...Cu contacts of 2.4450 (7) Å

Enhancing the Performance of Supercapacitor Activated Carbon Electrodes by Oxidation

Oxidation of activated carbon (AC) with nitric acid was carried out, and the resulting AC/HNO3 showed high capacity when used as supercapacitor electrode material operated in the KOH electrolyte. Oxidation caused different structural changes in the AC, reducing the specific surface area and the total pore volume. After oxidation, the content of all types of oxygen-containing groups and, especially, carboxyl groups showed a significant increase. Despite the significant reduction of the specific surface area, the specific capacitance of the oxidized AC in symmetric supercapacitor electrodes is 1.4 times larger than that for the pristine AC

CO

Adsorption is currently the most promising capture technology to shorten atmospheric emissions of carbon dioxide (CO2). In this article, we report on the adsorption of CO2 onto pristine, oxidized, and aminated activated carbon (AC) sorbents. From our findings, some functionalized AC sorbents have shown very promising results in the CO2 capture process. Their maximum adsorption capacity measured by the thermogravimetric method at 20 °C varies between 2.2 and 3.9 mmol CO2/g depending on the content of diethylamino and oxygen-containing groups. The functionalization of the carbon surface with diethylamino groups improves the adsorption capacity by 30–40%. The CO2 adsorption little depends on the texture parameters of the pristine AC sorbents. In the range from 20 to 100 °C, the CO2 thermodesorption showed the effective regeneration of the sorbents. The aminated carbon surface demonstrates the best CO2 adsorption but binds the adsorbed molecules stronger than the oxidized surface, which limits the sorbent regeneration