S.+Lindo+&+K.+Dickson+Reaction+Wiki

Reaction Wiki Project By Katie Dickson and Sasha Lindo



The reaction that we are doing is the reaction of bis (2, 4, 5 – trichloropheny-6- carbonpentoxyphenyl) oxalate (CPPO) with hydrogen peroxide. Which are used to make glows sticks. Glow sticks or also know as light sticks. They are a source very bright light. They are used a lot during Halloween. Also scuba divers use them and when you are having a rave they are also used. Glows sticks are a type of chemiluminescent chemical reaction. There are several of them. Chemiluminescent is defined as the emission of light by an atom or molecule that is in an excited state. When you snap a glow stick and shake it the two liquids form and come together. Glow sticks use energy from a chemical reaction to emit light. A chemical reaction is made by mixing different chemicals compounds. This reaction causes the sticks to release energy. The way the chemical reaction occurs: 1.The hydrogen peroxide [|oxidizes] the phenyl oxalate ester, resulting in a chemical called [|phenol] and an unstable [|peroxyacid] ester. 2.The unstable peroxyacid ester decomposes, resulting in additional phenol and a cyclic peroxy compound. 3.The cyclic peroxy compound decomposes to carbon dioxide. 4.This decomposition releases energy to the dye. 5.The electrons in the dye atoms jump to a higher level, then fall back down, releasing energy in the form of light. ( token straight from website and listed below in sources) The two chemical solutions are held together in stick emitting light. The phenyl oxalate ester and dye solution take up most of the stick and the hydrogen peroxide solution is in a small tube within the stick. When you snap the stick the tube in the middle breaks and both the solutions come together and begin to emit light. If the solution in the stick is heated it will glow brighter, but for a shorter time period. If you freeze the stick it will last longer, but its glow would not be as bright as it would have been if heated.

the chemical reaction that cause a glow stick to emit light is caused by mixing multiple chemical compounds. compounds are substances made up of atoms of different elements, bound together in a structure. when you combined two or more compounds the atoms rearrange themselves to form new compounds. depending on the type of compound energy is either released or absorbed.

Luminescence which comes from chemiluminescence’s is an emission of light that is not caused by heat but by cold. The emitting light stays cold. The light comes from atoms that go from the charged state to the normal state. This means that an object that glows first most be able to absorb energy which causes it to transform into the charged state. Then the energy is released and it is in the from of light. It is released by an object going from charged state all the way back to the ground state of energy.

Sites: "Light Stick Colors." __About.com: Chemistry__. 2008. The New York Times Company. 6 Feb 2008 <[|http://chemistry.about.com/library/weekly/aa031703a.htm>.]

"Glow Sticks." __Werid Science__. 2008. Public Broadcasting Services. 6 Feb 2008 <[|http://www.pbs.org/kcet/wiredscience/story/55-glow_stick.html>.]

"How Light Sticks Work." __HowStuffWorks__. 2008. HowStuffWorks,Inc. 6 Feb 2008 <[|http://science.howstuffworks.com/light-stick1.htm>.]

"chemiluminescent." __Dictionary.com__. 2008. Lexico Publishing Group. 6 Feb 2008 <[|http://dictionary.reference.com/browse/chemiluminescent