Solid surface enhancement effects on chemiluminescence. III. Diaryloxalateas chemiluminescence reagent and inorganic materials as media solids

Solid surface enhancement effects on chemiluminescence were studied using m any inorganic materials as solid media. The results has been classified as follows: the first group (G-1) which has higher initial intensities and sho rter lifetimes compared with the reference chemiluminescence (blank CL; med ium solid used is a slide glass)-Al2O3 series including hydroxides and glas s fiber filter fall under this group (G-1); the second group (G-2) which ha s lower initial intensities and longer lifetimes compared with the blank CL -high purity CaCO3 fall under this group (G-2); the third group (G-3) which has higher initial intensities and longer lifetimes compared with the blan k CL-SiO2 powder and a silica fiber filter fall under this group (G-3); and the fourth group (G-4) which has lower initial intensities and shorter lif etimes compared with the blank CL-all remaining solid media other than grou p (G-1)-(G-3) fall under this group (G-4). Furthermore, from a chemilumines cent energy point of view, there exists another group (G-5) which has highe r relative luminescent energies or relative quantum yields than the blank o ne-all the compounds that belong to the group (G-3) and others in group (G- 1) and group (G-2), i.e., silica powder (SW-CO type), silica fiber filter ( QR-100 type), and high purity calcium carbonate (3N-D type) are members of this group (G-5). Effects of surface condition and particle size on chemilu minescence were also examined.