as well as ultraviolet and infrared regions. Photochemistry‚ a sub-discipline of chemistry‚ is the study of the interactions between atoms‚ small molecules‚ and light (or electromagnetic radiation).[1] The pillars of photochemistry are UV/VIS spectroscopy‚ photochemical reactions in organic chemistry and photosynthesis in biochemistry. |Contents | |[hide] | |1 Scientific background | |2 Spectral
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Kirchhoff’s Laws Gustav Kirchhoff‚ (1824-1887)‚ was a German physicist who contributed greatly to the understanding of electrical circuits‚ spectroscopy‚ and the emission of black-body radiation. Kirchhoff formulated his famous circuit laws in 1845‚ while still a student at the University of Konigsberg‚ East Prussia. He completed this study as a seminar exercise‚ and it later became his doctoral dissertation. Kirchhoff’s Laws include two basic principles. Kirchhoff’s First Law‚ also called
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C for 12 hours under an oxygen atmosphere with an equimolar ratio of the three reactants. TLC monitoring of the reaction mixture exhibited formation of a new product‚ which was purified (Table 1‚ entry 1). Identification of its structure by NMR spectroscopy revealed that it was 2-(4-methylbenzoyl)-1-naphthyl N-(tert-butyl)carbamate (4a). Next‚ in order to improve the yield of 4a‚ the effects of different solvents‚ reaction temperatures and times together with the molar ratio of the reactants were
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Unknown 1: Yellow (Sodium) . Unknown 1 was sodium because it had a yellow color when burnt. Unknown 2: Blue/White (Potassium) Unknown 2 was potassium was potassium because when burnt‚ the same color appeared with potassium was burnt. Part Two (Spectroscopy): 1. Create and complete a data table for Part Two of the lab. It should include the name of the element‚ the colors‚ and the wavelength values of the observed lines. 2. Describe the line spectrum of the star
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Introduction Tetraphenylporphyrin will be synthesized and metallated with silver acetate. After purification and NMR and UV-visible spectra was taking for the original porphyrin synthesized and the silver porphyrin. From this data obtained we will talk about silver’s effect on porphyrin. Theory Porphyrin is important to study because it plays keys roles in biological process; they are responsible for giving plants and blood their colors green and red respectively. Porphyrins have the iron chelate
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used at wavelength from 400 to 800 nm due to sharpness of the peaks and proper baseline. The profile showed the peaks at 422 and 644 nm with the absorption of respectively solvent. Sahaya Sathis‚ S et al.‚ (2012). 3.17 Fourier Transform Infrared Spectroscopy (FT- IR) The FT – IR spectrum was used to identify the functional group of the active components based on the peak values in the region of infrared radiation. FT - IR analysis was carried out St. Joseph’s College‚ Tiruchirappalli – 2. Using a Perkin
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Adlercreutz‚ H.‚ 1990. Western diet and Western diseases: some hormonal and biochemical mechanisms and associations. Scandinavian Journal of Clinical Laboratory Investigation‚ 50‚ 3S-23S. 2. Albert‚ K.‚ 1999. Liquid chromatography-nuclear resonance spectroscopy. Journal of Chromatography A‚ 856‚ 199-211. 3. Andersen‚ M.‚ and Markham‚ K.R.‚ 2006. Flavonoids: Chemistry‚ Biochemistry and Applications. Boca Raton: CRC Press‚ pg 20‚ 36‚ 84 and 104. 4. Anderson‚ J. W.‚ Johnstone‚ B.M.‚ and Cook-Newell‚ M
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this experiment both the trans and the cis isomers of the 2-methylcyclohexanone were to be formed. This is due to the chiralty of the compound itself. The product will either be thermodynamically controlled or controlled by the kinetics itself. IR spectroscopy can then be
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antioxidant. Lycopene is found in various fruits and vegetables. The purpose of this experiment is the isolation of Lycopene from tomato paste. This is done using liquid/solid extraction and chromatography. Once the Lycopene is isolated‚ IR spectroscopy will determine its percentage actually obtained by chromatography. Procedure: A massed sample of 1.012g of tomato paste was placed in a 125mL Erlenmeyer flask. To the flask‚ 5mL of 50:50 hexane-acetone was added into the flask. After the
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Rubidium forms amalgams with mercury and alloys with gold‚ sodium‚ potassium‚ and cesium. Rubidium glows red-violet in a flame test. Rubidium Trivia: • Rubidium melts just a little above body temperature. • Rubidium was discovered using spectroscopy. When Bunsen and Kirchoff examined their sample of petalite‚ they found two red spectral lines deep into the red part of the spectrum. They named their new element rubidium after the Latin word rubidus meaning ’deepest red’. • Rubidium is the
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