Chemiluminescent composition, and a reactive component suitable for such a composition
AssigneeFarmitalia Carlo Erba S.p.A.
InventorGiampiero Borsotti
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Abstract
The invention relates to a chemiluminescent composition, i.e. one which emits light when its various constituent components are mixed together. The composition consists of at least two separate solutions of at least one oxalate, at least one fluorescent substance, hydrogen peroxide and at least one catalyst, in which those components which react together are kept separated. The characteristic of the 9,10-bis(phenylethynyl)anthracene is that the oxalate is a bis(dihalo-acylphenyl)oxalate. This compound is easily and economically produced and is easily soluble in the solvents used, to provide high-intensity light emission for long time periods. The 2,4- or 2,6-acyl substituted phenyloxalate also forms a subject matter of the invention.
Claims9
A chemiluminescent composition formed from at least two separate solutions in which those components which react with each other are kept separated, the components being chosen from the group consisting of at least one oxalate, at least one fluorescent substance, hydrogen peroxide and at least one catalyst chosen from the group consisting of alkaline salts of long-chain carboxylic acids and sodium and potassium salicylates, characterized in that said oxalate is a bis(dihalo-acylphenyl) oxalate of the formula:
- ##STR3## in which:
- R is an alkyl containing from 3 to 11 carbon atoms,
- X is a halogen chosen from the group consisting of F, Cl or Br in meta-meta positions with respect to the acyl group, and the --COR group is in the ortho or para position with respect to the phenolic hydroxyl, the hydrogen peroxide being present in the proportion of between 2 and 10 moles per mol of oxalate.
A chemiluminescent composition comprising, as an active ingredient, a bis(dihaloacylphenyl)oxalate of the formula:
- ##STR4## in which:
- R is an alkyl containing from 3 to 11 carbon atoms,
- X is a halogen chosen from the group consisting of F, Cl or Br in meta-meta positions with respect to the acyl group, and the --COR group is in the ortho or para position with respect to the phenolic hydroxyl.
Dependencies are inferred from the claim text.