Seven kinds of light by chemical reaction chemiluminescence by oxalate ester

Abstract

Introduction The reaction of oxalate ester with hydrogen peroxide makes peroxyoxalate, which contains a lot of potential chemical energy. A fluorescer converts this chemical energy to visible light.[1] Our interest was in the properties of this light. First, different kinds of fluorescer were used for this study and the properties of the light given off examined. Next, we assumed that chlorophyll emits light as a fluorescer – to release excess chemical energy from photosynthetic inefficiencies in the form of light.[1] Red light emitted by chlorophyll has been so far observed. Materials and Methods Experiment with different fluorescers A solution was made from bis (2,4,6-trichlorophenol) oxalate (TCPO) and fluorescer and was added to a solution composed of hydrogen peroxide and sodium salicylate. Dimethyl phthalate and tert-butyl alcohol were used as solvents. The temperature of solution was approximately 30 degrees Celsius. Then we took measurements of the intensity and the quantity of light with an optical sensor. The maximum wavelength was measured by means of a spectrophotometer. Experiment with chlorophyll We employed chlorophyll as a fluorescer extracted by tert-butyl alcohol from dogwood leaves, measuring the maximum wavelength of the emitted light with a spectrophotometer. Results and Discussion Table 1 shows that the intensity, the quantity of light, This group became interested in the light that is given off in chemiluminescent reactions and by chlorophyll. The intensity, wavelength, and quantity of light was measured from several chemical reactions and compared with the light given off by chlorophyll. They found that the properties of the emitted lights are different for each fluorescer. Fluorescers which can emit light have several aromatic rings such as chlorophyll. Yumi Sato, Yuri Tokushige, Atsuki Nishikawa1, Kazuya Sato, Mineki Yamamoto2 Meiwa Senior High School, 1Gojo Senior High School, 2Toyota-nishi Senior High School, Tokyo, Japan. E-mail: stuym-16.39@wh.commufa.jp DOI: 10.4103/0974-6102.107617 Table 1: Experiment 2.1 Fluorescer Intensity [lx=lm∙m‐2] Quantity of light [102∙lm∙s∙m‐2] Max wavelength [nm] Anthracene −* −* 408 9,10‐Diphenylanthracene 6 0.53 438 Perylene 102 21.00 477 Naphthacene 48 5.70 520 9,10‐Bis (phenylethynyl) Anthracene 28 2.70 512 Rubrene 134 27.00 564 Rhodamine 6G 4 0.26 579 Rhodamine B 7 1.30 592 *Impossible to measure