Chemoluminescence with Oxalyl Chloride

This experiment must be carried out in a well-ventilated hood. Oxalyl chloride and dichloromethanc are toxic. Safety glasses and gloves must be worn. The toxicity of the indicators is not known, so that they should be handled with care. 

Five 250-mL Erlenmeyer flasks with stoppers, 150-mL measuring cylinder, 15-mL measuring cylinder, 2-mL pipette, safety glasses, protective gloves. 

Dichloromethanc, 3 % H2O2 solution, oxalyl chloride (CI2C2O2), rhodamine 6 G, rubrene, 9,10-diphenylanthracene, 13,I3 -dibenzanthronyl. 

50 mL of CH2CI2 arc mixed with 2 mL of oxalyl chloride in an Erlenmeyer flask. (This solution is stable for a considerable length of time if the flask is stoppered and kept in the dark). 

005 g of one of the indicators, 25 mL of CH2CI2 and 4 mL of 3 % H2O2 are introduced one after the other into a 250-mL Erlenmeyer flask. 2 mL of the oxalyl chloride solution are added, the room darkened and the flask swirled. A bright glow can be seen immediately. The color, intensity, and duration of the chemoluminescence depend on the indicator used as shown in the following table 

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