Capturing Hydrolysis Products in the Solid State: Effects of pH on Uranyl Squarates under Ambient Conditions

2010 ◽  
Vol 49 (19) ◽  
pp. 8668-8673 ◽  
Author(s):  
Clare E. Rowland ◽  
Christopher L. Cahill
Keyword(s):  
Solid State ◽  
Ambient Conditions ◽  
Hydrolysis Products ◽  
Effects Of Ph

Competing Effects of pH, Cation Identity, H2O Saturation, and N2 Concentration on the Activity and Selectivity of Electrochemical Reduction of N2 to NH3 on Electrodeposited Cu at Ambient Conditions

ACS Catalysis ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14592-14603
Author(s):  
Nishithan C. Kani ◽  
Aditya Prajapati ◽  
Brianna A. Collins ◽  
Jason D. Goodpaster ◽  
Meenesh R. Singh
Keyword(s):  
Electrochemical Reduction ◽  
Ambient Conditions ◽  
Effects Of Ph

scholarly journals Adsorption Properties of Sepiolite in Relation to Uranium and Lanthanide Ions

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 686 ◽  
Author(s):  
Gładysz-Płaska
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Properties ◽  
Lanthanide Ions ◽  
Ambient Conditions ◽  
Initial Concentration ◽  
Ph Values ◽  
Batch Technique ◽  
Effects Of Ph ◽  
Ph Range

The batch technique was used to study the adsorption of La(III), Eu(III), Lu(III), and U(VI) ions on sepiolite and ODTMA–sepiolite under ambient conditions. The effects of pH, time, and initial concentration were investigated. The highest U(VI) adsorption was found on ODTMA-sepiolite in the pH range of 6–8, while in the case of lanthanide ions, adsorption on sepiolite was 80% in the pH range of 4–8 and 98% for pH values above 8. The adsorption capacity of ODTMAsepiolite was found to be 285.6 mg/g for uranium, and raw sepiolite: 142.8 mg/g for U(VI), 91.6 mg/g for La(III), 91.4 mg/g for Eu (III), and 104.9 mol/g for Lu(III). ODTMA–sepiolite turned out to be a weak sorbent for lanthanide ions. Two short- and long-lived fluorescence species were observed in the TRLFS spectra of U(VI) adsorbed on sepiolite at pH 6.5. The average lifetimes of short- (τ1) and long-lived (τ2) fluorescence are τ1 = 2420 ± 430 ns and τ2 = 37950 ± 5710 ns for U-sepiolite; τ1 = 3523 ± 160 ns and τ2 = 45400 ± 1830 ns for U-ODTMA–sepiolite.

scholarly journals Solid-State Characterization and Compatibility Studies of Penciclovir, Lysine Hydrochloride, and Pharmaceutical Excipients

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3154 ◽  
Author(s):  
Rafaela Z. C. Meira ◽  
Isabela F. B. Biscaia ◽  
Camila Nogueira ◽  
Fabio S. Murakami ◽  
Larissa S. Bernardi ◽  
...  
Keyword(s):  
Solid State ◽  
Ethylenediaminetetraacetic Acid ◽  
Therapeutic Potential ◽  
Chemical Characterization ◽  
Compatibility Studies ◽  
Ambient Conditions ◽  
Scanning Calorimetry ◽  
Crystalline Materials ◽  
Physical And Chemical ◽  
Solid State Characterization

The physical and chemical characterization of the solid-state properties of drugs and excipients is fundamental for planning new formulations and developing new strategies for the treatment of diseases. Techniques such as differential scanning calorimetry, thermogravimetry, X-ray powder diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy are among the most commonly used techniques for these purposes. Penciclovir and lysine are individually used to treat the herpes virus. As such, the development of a formulation containing both drugs may have therapeutic potential. Solid-state characterization showed that both penciclovir and lysine were crystalline materials with melting points at 278.27 °C and 260.91 °C, respectively. Compatibility studies of penciclovir and lysine indicated a possible interaction between these substances, as evidenced by a single melting point at 253.10 °C. The compatibility of several excipients, including ethylenediaminetetraacetic acid, cetostearyl alcohol, sodium lauryl sulphate, di-tert-butyl methyl phenol, liquid petrolatum, methylparaben, nonionic wax, paraffin, propylene glycol, and propylparaben, was evaluated in ternary (penciclovir-lysine-excipient) mixtures (1:1:1, w/w/w) to determine the optimal formulation. The developed formulation was stable under accelerated and ambient conditions, which demonstrated that the interaction between penciclovir and lysine was suitable for the development of a formulation containing both drugs.

scholarly journals Quasi-Solid-State Electrochromic Cells with Energy Storage Properties Made with Inkjet Printing

Materials ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3241 ◽  
Author(s):  
Krystallia Theodosiou ◽  
Panagiotis Giannopoulos ◽  
Tilemachos Georgakopoulos ◽  
Elias Stathatos
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Inkjet Printing ◽  
Visible Region ◽  
Electrochromic Device ◽  
Ambient Conditions ◽  
Ion Diffusion ◽  
Ion Storage ◽  
Energy Storage Properties ◽  
Conductive Substrates

In common commercially available electrochromic glass panes, the active materials such as WO3 and NiOx films are typically deposited by either physical vapor or sputtering under vacuum. In the present studies, we report on the inkjet printing method to deposit both electrochromic and ion storage electrode layers under ambient conditions. An ion storage layer based on cerium modified TiO2 and electrochromic nanocrystalline WO3 were both prepared under the wet method and deposited as inks on conductive substrates. Both compounds possess porous morphology facilitating high ion diffusion during electrochemical processes. In particular, the ion storage layer was evaluated in terms of porosity, charge capacity and ion diffusion coefficient. A scaled up 90 cm2 electrochromic device with quasi-solid-state electrolyte was made with the aforementioned materials and evaluated in terms of optical modulation in the visible region, cyclic voltammetry and color efficiency. High contrast between 13.2% and 71.6% for tinted and bleached states measured at 550 nm was monitored under low bias at +2.5 volt and −0.3 volts respectively. Moreover, the calculated energy density equal to 1.95 × 10−3 mWh cm−2 and the high areal capacitance of 156.19 mF cm−2 of the device could combine the electrochromic behavior of the cell with energy storage capability so as to be a promising candidate for future applications into smart buildings.

EPD of Phosphors for Display and Solid State Lighting Technologies

2012 ◽  
Vol 507 ◽  
pp. 149-153 ◽  
Author(s):  
Jae Ik Choi ◽  
Esther Sluzky ◽  
Maria Anc ◽  
Alan Piquette ◽  
Mark E. Hannah ◽  
...  
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Zeta Potential ◽  
Salt Concentration ◽  
Solid State Lighting ◽  
Processing Conditions ◽  
Nitrate Salt ◽  
Deposition Rates ◽  
Information Displays ◽  
Effects Of Ph

Electrophoretic deposition (EPD) has been used for phosphor screening for a variety of emissive information displays and more recently, for solid state lighting. EPD is well suited to deposit the fine (nanometer to micrometer diameter) phosphor particles needed for high resolution displays. The fundamentals of the EPD process in an isopropanol (IPA) bath have been characterized by the dissociation behavior of nitrate salts in IPA, measurement of the effects of pH and nitrate salt concentration on the zeta potential of the particles, studying of the processing conditions and modeling of the deposition rates. The electrochemical precipitation reactions form an adhesive agent for the particles and the adhesion strength can be enhanced by various methods to meet the requirements of these technologies.

scholarly journals Intense greenish phosphorescence emission under ambient conditions in a two-dimensional lead(ii) coordination polymer with a 1,1′-ethynebenzene-3,3′,5,5′-tetracarboxylate ligand

2017 ◽  
Vol 46 (24) ◽  
pp. 7953-7959 ◽  
Author(s):  
Xiao Liu ◽  
Lu Zhai ◽  
Wen-Wei Zhang ◽  
Jin-Lin Zuo ◽  
Zhu-Xi Yang ◽  
...  
Keyword(s):  
Solid State ◽  
Quantum Yield ◽  
Coordination Polymer ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Phosphorescence Lifetime ◽  
Phosphorescence Emission

A new 2D Pb2+-based coordination polymer emits intense greenish phosphorescence in the solid state under ambient conditions with a quantum yield of 1.5% and a phosphorescence lifetime of 4.17 ms.

scholarly journals Supramolecular interactions in the solid state

IUCrJ ◽  
2015 ◽  
Vol 2 (6) ◽  
pp. 675-690 ◽  
Author(s):  
Giuseppe Resnati ◽  
Elena Boldyreva ◽  
Petra Bombicz ◽  
Masaki Kawano
Keyword(s):  
Solid State ◽  
Intermolecular Interactions ◽  
Historical Review ◽  
Covalent Bond ◽  
Halogen Bonding ◽  
Molecular Assembly ◽  
Supramolecular Interactions ◽  
Ambient Conditions ◽  
Chemical Research ◽  
Primary Means

In the last few decades, supramolecular chemistry has been at the forefront of chemical research, with the aim of understanding chemistry beyond the covalent bond. Since the long-range periodicity in crystals is a product of the directionally specific short-range intermolecular interactions that are responsible for molecular assembly, analysis of crystalline solids provides a primary means to investigate intermolecular interactions and recognition phenomena. This article discusses some areas of contemporary research involving supramolecular interactions in the solid state. The topics covered are: (1) an overview and historical review of halogen bonding; (2) exploring non-ambient conditions to investigate intermolecular interactions in crystals; (3) the role of intermolecular interactions in morphotropy, being the link between isostructurality and polymorphism; (4) strategic realisation of kinetic coordination polymers by exploiting multi-interactive linker molecules. The discussion touches upon many of the prerequisites for controlled preparation and characterization of crystalline materials.

scholarly journals Cationic Mn 2+ /H + exchange leading a slow solid-state transformation of a 2D porphyrinic network at ambient conditions

2017 ◽  
Vol 247 ◽  
pp. 161-167 ◽  
Author(s):  
Eder Amayuelas ◽  
Arkaitz Fidalgo-Marijuan ◽  
Begoña Bazán ◽  
Miren Karmele Urtiaga ◽  
Gotzone Barandika ◽  
...  
Keyword(s):  
Solid State ◽  
Ambient Conditions ◽  
State Transformation ◽  
Solid State Transformation
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