Infrared spectroscopy

number for the optimized geometry was calculated at the same level of theory. The computed values of frequencies are scaled using an appropriate scale factor to give up the excellent unity with the observed values. Detailed interpretations of the infrared and Raman spectra of 2NAP are reported. The theoretical spectrograms for FT-IR spectra of the title molecule have been constructed. The 1H and 13C nuclear magnetic resonance (NMR) chemical shift of the molecules are calculated by the gauge…

3. Results and discussion 3.1. XRD analysis The X-ray diffraction (XRD) pattern of Sn-substituted Ni-Zn ferrites with the chemical composition of Ni0.6-x/2Zn0.4-x/2SnxFe2O4 (NZSFO) are shown in Fig. 1. The XRD spectra were indexed and fcc cubic phase was identified. The structural parameters are calculated from the XRD data and have been discussed in Ali et al [6]. The lattice constants are calculated from the XRD data and represented in Table 1. The distances between the magnetic ions at…

Paragraph 1 Compare and contrast the crystal structures and crystal chemistry of quartz, α-FePO4 and β-FePO4. Haines’ research paper studies the change that occurs in the FePO4 structure as it is studied from temperatures 294K to 1073K. A transition is noticed at 980K, when it’s tetrahedral α-quartz structure experiences high pressure levels, changing the structure to β-phase, a more dense octahedral structure. Cell parameters of FePO4 in α-phase increases in cell parameters and volume as…

The ultimate purpose of this lab is to find how much copper is in brass using the visible spectroscopy, in addition to the introduction of Beer’s law, a physical law that can be utilized to determine the unknown concentration of a metal ion in a solution if its absorbance is calculated; you can accurately measure it by means of a standard graph called a calibration curve. Also colorimetry, a technique “used to determine the concentration of colored compounds in solution” (Housecroft, Catherine)…

Spectroscopy is the study of objects, which is represented on the spectrum of color they radiate. An interaction of electromagnetic radiation with matter. Spectroscopy involves the process of absorption, emission, or scattering of electromagnetic radiation by either ions, atoms, or molecules. The process of absorption involves when light is absorbed by electrons that jump to higher energy levels. On the other hand, emission spectra are established when the electrons from high energy levels give…

is to determine the optimal absorption of different solutions, specifically the Chloroplast extract (chlorophyll a and chlorophyll b) and Fast Green solution using the technique of spectroscopy. The following graphs and data will be used to identify the concentration of the given unknown solution #294. Spectroscopy is a process whereby a spectrophotometer is used to determine the absorbance levels of different solutions at different wavelengths (Pettruci et al., 2011). Essentially, it studies…

The primary purpose of this experiment was to determine the concentration of solutions of copper (II) sulfate using visible spectrophotometry and Beer’s law. In this experiment, we used Beer’s law, which states that absorbance, i.e. the amount of light absorbed by a solution, is equal to the molar absorptivity of a compound, times the path length of the cuvette, times the concentration of the solution. First, we measured the absorbance of a cuvette filled with water, then calibrated the…

In this study, the effect of benzenethiol ligand on CdSe/ZnS core/shell quantum dots was investigated. Conventional long-chain oleic acid (OA) and trioctylphosphine (TOP) capping ligands were partially replaced by short benzenethiol ligands, and the improvement in the luminescence performance was observed in quantum dot light emitting diodes (QD-LED). Approximately 1.8 fold improvement was achieved for both the maximum luminance and maximum current efficiency for the QD-LEDs fabricated with…

The purpose of this experiment was to use aldol condensation methods to synthesize colored cyclopentadienone and then UV/VIS spectrophotometry to characterize the dienone structure synthesized. The information gathered from the UV/VIS analysis was then compared to a computer model of the desired product to analyze the optimal 3D structure of the dienone. The base catalyzed condensation reaction was used to form the product for analysis, followed by vacuum filtration to recover the product. Both…

this experiment that was conducted in partners, the concentration of RNase H that was purified in the previous experiment #6 was determined and also the concentration of an unknown given solution using their absorbance values obtained from the spectroscopy apparatus. These concentrations were calculated using the equation of the line produce with the values of the concentration (x-axis) and corresponding absorbance (y-axis) of five protein bovine gamma globulin standard solutions. In order to…