Chemiluminescence

chemi-luminescent compound that has the unique property of emitting light when it reacts with certain chemicals. This chemical is extremely useful in crime scenes, for luminol is greatly used by crime scene investigators to discover spots of blood even if evidence has been removed by the criminal. Iron, found in the hemoglobin of red blood cells, acts as a catalyst in this chemiluminescent reaction, making luminol highly sensitive to bloodstains/residues, and even to old stains in walls, carpets, upholstery, wooden floors, or painted surfaces.. The light emitted is a blue-greenish light which can be visible to the human eye in a fairly dark room. The blood is revealed with iron, as the catalyst, sodium hydroxide, and hydrogen peroxide. Chemiluminescence is the process by which light is…

Abstract: Chemiluminescence is an essential topic in the study of chemistry. The reaction involves mixing two chemicals were to form an excited (high-energy) intermediate that releases energy as light. This experiment first synthesized luminol by reducing 5-nitro-2,3-dihyodropthlazine-1,4-dione, using sodium hydrosulfite (Na2S2O4) and 3M sodium hydroxide (NaOH). The amount of luminol collected was 0.2693 g with the percent yield of 161%. The product of the first reaction was then used to…

One thing to note is that I would recommend that new samples be taken from the clothing at each testing stage and not to use the samples tested with LMG as according to a study by Alenazy, Refaat and Babu, 2015 the use of LMG to test samples that then go off for DNA analysis produce poor partial profiles, apparently due to the longevity of the LMG chemiluminescence…

Chemiluminescence is the release of light due to a chemical reaction. It is the chemical reaction responsible for the glow of objects such as glow stick and animals such as jellyfish and fireflies. Two organic laboratory techniques were used, reflux and vacuum filtration, to synthesize luminol and replicate this glow. The end result of this product was a neon blue light that shined for a couple of seconds. Introduction: Chemiluminescence is chemical reaction that can be seen every day. Its…

Chemiluminescence, the emission of light as a result of a chemical reaction, occurs through natural and artificial means. One can see this same chemical reaction in jellyfish, fireflies, glow sticks, and even during forensic investigations (Welsh, 2009). During a chemiluminescent reaction, two reactants react with each other to form a high-energy intermediate. As the intermediate returns to the ground state, like all chemical reactions, it breaks down into the products while releasing energy in…

Molecules Project 1: Chemiluminescence Luuk Adema & Ewout van der Veer S2794640 & S2680254 luukadema@hotmail.com & ewoutvanderveer@msn.com 31-10-14 F. Mecozzi, E. Hagting & M. van Zuylen Abstract Luminol was synthesized and the light intensity of its luminescence was tested. The yield of the synthesis was 55%. Measurements of the intensity of luminescence were done under standard and optimal conditions resulting in peak intensities of ±0.02 lux (standard) and ±0.03 lux (optimal). It has been…

A glow stick is a small plastic tube with chemicals inside it. When When you snap a glow stick and hear it crack it gives off a temporary glow. As you snap the glow stick and hear it crack. Chemicals inside the glow sticks starts to mix together. This is a process call chemiluminescence. Chemiluminescence is a process where light is produced by a chemical reaction. Instead of using an electrical source. An example of this would be if go outside during a fall night and see a firefly glowing…

Luminol is a chemiluminescent reaction, meaning it creates light but no heat. Luminol doesn’t create heat because it does not allow a passageway to release energy, it does this by releasing a photon. A photon carries energy equal to the radiation frequency. There are a few drawbacks to using luminol. Luminol can be set off by many things, such as copper or items that contain copper. Also, even a small amount of animal blood can mess up the reaction of luminol. In 1994, a scientist by the name…

them in a number of situations as well. One important aspect of glow sticks is that they are water proof, so if you ever go scuba diving or just want something to light up in your pool then glow sticks are perfect for that. Another feature of them is that they do not require any batteries at all so they are very simple to use, and one final thing that is interesting about glow sticks is they generate an insignificant, or small, amount of heat, sometimes no heat at all. However the most important…

researchers study how the pancreas works. It’s amazing how Green Fluoresce Protein has helped researches in a very effective way that it’s even saving humans life for finding cures and it also helps them study the world around them. The energy that has been absorbed by an electron does not always come from photons of light. Basically when the electron absorbs energy the atoms increase. In the other side when the energy level decreases it gives a light in return. An example of where this can be…