Spectroscopy

STUDIES ON OXADIAZOLE SUBSTITUTED METAL (II) PHTHALOCYANINES Shoukat Ali R A, J Keshavayya and Maliyappa M R Department of Chemistry, School of Chemical Sciences, Jnana Sahyadri, Kuvempu University, Shankaraghatta - 577 451, Shimoga, Karnataka, India. Email:shoukichem@gmail.com, Cell: +91 - 9164113355 Abstract: The present research report describes about the synthesis and studies on 2, 9, 16, 23 - tetra substituted metal (II) phthalocyanines through oxadiazole bridge. Which

Surface modification of UV-light sensitive Na-K2Ti6O13 photocatalyst with Cu(II)-nanocluster for efficient visible-light-driven photocatalytic activity Azam khan a, Umair Alam a, Danish Ali a, Detlef Bahnemann b, M. Muneer a,* aDepartment of Chemistry, Aligarh Muslim University, Aligarh 202002, India bPhotocatalysis and Nanotechnology, Institut fuer Technische Chemie, Gottfried Wilhelm Leibniz Universitaet Hannover, Callinstrasse 3, D-30167 Hannover, Germany cPhotoactive Nanocomposite Materials

Earth; we occasionally perceive our planet to be the center of the universe. However, our planet is just one in millions and billions of other planets and galaxies. We are one grain of sand on the beach of space. Scientists say that everything we know today to be true, started out approximately 13.7 billion years ago as a Big Bang. Everything there is today, all matter, space, time, and energy were condensed into an incredibly small point the size of an atom. It was infinitely hot and infinitely

Effect of Concentration on the Intensity of Fluorescence in Turmeric Powder Research Question: What is the effect of concentration on the intensity of fluorescence in turmeric powder? Hypothesis: As the concentration of the turmeric solution increases, the intensity of the fluorescence increases as well. Background Information Luminescence1 can be referred to as a term that encompasses the idea that temperatures involving high levels of heat do not always directly result in light emission.

It has been the main topic of this thesis to establish the link between state-of-the-art theoretical tools and typical spectroscopies in order to contribute to the understanding of complex many-body compounds. The synergy between theory and experiment was given a special attention. The main spectroscopy studied theoretically by the works in this thesis is photoemission and its variants. In particular, we worked out the effects of correlations in many-body systems as manifested in spectroscopic quantities

primarily copper, iron, and zinc. However, the amount of copper in brass affects many of its characteristics, including brass’ color, color, strength and so on. To find out the amount of copper in brass, simple technique can be employed, called spectroscopy. Spectroscopy involves viewing the amount of electromagnetic radiation absorbed by a substance, which can let one determine the concentration of an element that composes that substance using the amount of energy absorbed. In the case of brass, this technique

3. Results The investigated minerals show Raman bands between 375 and 50 cm-1 (Figs. 1-4, Table 1), where the cut-off value of the employed Raman notch and edge filters determine the low-energy limit. The Raman bands in the boulangerite spectra occur in the vibrational region between 375 and 50 cm–1 (Fig. 1, Table 1), with no additional bands in higher or lower wavenumber regions. Boulangerite spectra are characterized by a very strong band at 335 cm–1 and reveal thirteen strong, medium, weak to

Upconversion is a term that characterizes the conversion of lower-energy light, particularly in the near-infrared region, into higher-energy light within the visible spectrum. This occurs through a process in which the sequential absorption of multi-photon near-infrared light yields the emission of light that is of shorter wavelength[1]. This process is represented in Figure 1, which shows the emissions of light within the visible spectrum after excitation of various dopant ions by near-infrared

compared to simple ZnO nanoparticle mesoporous films. To the best of our knowledge, the highest η (7.5%) was reported by hierarchical assembled ZnO nanocrystallites, which offer large specific surface area for dye loading while poly-dispersed aggregates act as efficient light scatters, enhancing the probability of photon absorption (Pandey, et al. 2017, Zhang Q et al. 2008, Petra J et al. 2003, Memarian N et al. 2011). Another strategy to boost η in ZnO DSSCs is the application of a ZnO buffer layer

Chemistry 12 Formal Report Measuring Reaction Rate using Volume of Gas Produced By John Doe 23th October 2012 Introduction An essential element of chemistry is finding reaction rates. This is because chemists need to know how long a reaction should take. In addition to needing to know the rate of a reaction at any point in time to monitor how the reaction is proceeding. Many factors effect reaction rates, two shown above include temperature and concentration. Concentration affects the