Vibrational modes (VLMs) of Ge—O—Ge quasi-molecule. 4.2.1 Measurement of oxygen concentration The most convenient way to detect interstitial oxygen in germanium is by the infrared (IR) absorption spectrum, as shown in Figure 4.2. The main feature present is the band at 856 cm−1 which...
Photosensitization is based on the absorption of photons by the molecule, where the energy of its excited state is transferred to the pesticide via homolysis, heterolysis and photolysis. In addition, there may be oxidation and reduction processes, for example, the photo-Fenton reaction.60 Photocatal...
The production of H2with high turnover frequencies (TOFs) using earth-abundant molecular catalysts is an area of active research for replacing platinum as the pre-eminent catalyst in hydrogen evolution1,2. The primary inspiration for this comes from nature, where hydrogenases perform hydrogen redox ...
elemental analysis. Taking Gd compound as an example, the asymmetric unit contains a half fully deprotonated TPDB2−ligand, a half crystallographically independent Gd3+ion, one coordinated water molecule and one coordinated DMF molecule (Supplementary Fig.2). The Gd3+center is eight-coordinated with...
Real-Time In Situ Observation of Chemical Reactions. The fifth example is the insertion reaction of an oxygen molecule into an overcrowded distibene compound. In all the examples, the reaction mechanisms are... Ohashi,Yuji - Acta Crystallographica: Section A (Wiley-Blackwell) 被引量: 0发表: 19...
Even though a few elements, such as carbon and gold, are sometimes found in elemental form in nature, most of the substances we see around us consist of two or more elements that have combined chemically to form more complex substances called compounds. For example, in nature, the element ...
The plant genus Fallopia is well-known in Chinese traditional medicine and includes many species that contain bioactive compounds, namely phytoestrogens. Consumption of phytoestrogens may be linked to decreased incidence of breast and prostate cancers therefore discovery of novel phytoestrogens and novel sou...
(SEM), X-ray diffraction, N2 sorption isotherms (BET method), Fourier transform infrared spectroscopy (FTIR), CHN elemental analysis and UV–Vis diffuse reflectance spectroscopy (UV–Vis-DRS) demonstrated the effectiveness of the process used for grafting of amine functionality in the interlamellar ...
moved to the RSTOIC block to simulate the production of H2S, HCl, and NH3(N2, Cl, and S as elemental components are known to produce mainly H2S, HCl, and NH3, and a fractional conversion of 1 is quite in line with experimental data which represents the worst case of maximum contaminants...
Atomic emission spectrophotometry is a method of chemical analysis that uses the intensity of light emitted from a flame, plasma, arc, or spark at a particular wavelength to determine the quantity of an element in a sample. From: Principles of Measurement and Transduction of Biomedical Variables,...