Search results for "ammonium"
showing 10 items of 1070 documents
CCDC 816224: Experimental Crystal Structure Determination
2011
Related Article: Jiong-Peng Zhao, Bo-Wen Hu, F.Lloret, Jun Tao, Qian Yang, Xiao-Feng Zhang, Xian-He Bu|2010|Inorg.Chem.|49|10390|doi:10.1021/ic1014863
CCDC 1495417: Experimental Crystal Structure Determination
2016
Related Article: Teresa F. Mastropietro, Nadia Marino, Giovanni De Munno, Francesc Lloret, Miguel Julve, Emilio Pardo, and Donatella Armentano|2016|Inorg.Chem.|55|11160|doi:10.1021/acs.inorgchem.6b01769
CCDC 1480930: Experimental Crystal Structure Determination
2016
Related Article: Marta Mon, Thais Grancha, Michel Verdaguer, Cyrille Train, Donatella Armentano and Emilio Pardo|2016|Inorg.Chem.|55|6845|doi:10.1021/acs.inorgchem.6b01256
CCDC 1909316: Experimental Crystal Structure Determination
2019
Related Article: Cristian Martínez-Hernández, Samia Benmansour, Carlos J. Gómez García|2019|Polyhedron|170|122|doi:10.1016/j.poly.2019.05.034
RAVITA Technology : new innovation for combined phosphorus and nitrogen recovery
2018
Abstract Present phosphorus (P) recovery technologies mainly contain P recovery from sludge liquor or ash. These types of technologies are suitable for large wastewater treatment plants (WWTPs) with enhanced biological phosphorus removal (EBPR), digestion and/or incineration. In Finland and other Nordic countries, strict P discharge limits require chemical precipitation, thus EBPR alone is not sufficient. Ammonium recovery from wastewater, on the other hand, is not so often discussed. However, recovery from WWTP reject waters would decrease the energy demand of ammonium synthesis by Haber-Bosh technology and the energy demand of the WWTP's biological process. Helsinki Region Environmental S…
Ion Pair Binding in the Solid-State with Ditopic Crown Ether Uranyl Salophen Receptors
2016
Two ditopic uranyl salophen receptors with benzo-15-crown-5 and benzo-18-crown-6 units (R(1) and R(2), respectively) have been synthesized from commercially available starting materials. Comprehensive studies on the solid-state ion pair complexation with various alkali and ammonium halides have been conducted. From the 19 obtained solid-state structures (6 structures with R(1), 13 structures with R(2)), three general interaction motifs I-III have been observed. Interaction motif I has a separated ion pair with the cation coordinated to the crown ether unit, and the anion or oxygen containing solvent molecule coordinated to the uranyl center. The interaction motif II manifests a polymeric st…
Host–Guest Interactions of Sodiumsulfonatomethyleneresorcinarene and Quaternary Ammonium Halides: An Experimental–Computational Analysis of the Guest…
2020
The molecular recognition of nine quaternary alkyl- and aryl-ammonium halides (Bn) by two different receptors, Calkyl-tetrasodiumsulfonatomethyleneresorcinarene (An), were studied in solution using...
Aziridination of Aromatic Aldimines Through Stabilized Ammonium Ylides: A Molecular Electron Density Theory Study
2019
Insights into catanionic vesicles thermal transition by NMR spectroscopy
2012
Oppositely charged ionic surfactants can self-assemble into hollow structures, called catanionic vesicles, where the anionic-cationic surfactant pair assumes a double-tailed zwitterionic attitude. In the present work, multilamellar- to-unilamellar thermal transition of a mixed aqueous system of sodium dodecyl sulphate (SDS) and cetyl trimethyl ammonium bromide (CTAB), with a slight excess of the anionic one, has been investigated by 1H, 2H, 14N NMR spectra and 23Na transverse relaxation measurements. It has been inferred that an increase of the temperature enhances the SDS counterion dissociation, which can be considered as one of the driving forces of the mentioned transition. Moreover, in…
Application of the negative staining technique to both aqueous and organic solvent solutions of polymer particles
1999
Abstract Transmission electron microscopy (TEM) imaging of several different polymers in aqueous and organic solutions using the negative staining technique is demonstrated, to emphasise the possibilities of this specimen preparation technique for polymer science. Negative stains can readily be prepared in both water and organic solvents (e.g. dimethyl formamide (DMF), dimethyl sulfoxide (DMSO) and tetrahydrofurane (THF)). Polymer particle size, size distribution and shape seen in negative stain correlates well with those of unstained materials. The particle surface and smaller particles (e.g. 10–20 nm) are more clearly defined in the presence of a negative stain. The inherent problems of s…