Chemiluminescence in the reaction of LnI2 (Ln=Dy, Nd) with water

Chemiluminescence (CL) upon the reaction of crystalline LnI(2) (Ln = Dy, Nd) with water was found. The CL emitters are the Ln(3+)* electron - excited ions (Dy3+*,lambda(max) = 470, 570 nm; Nd3+*,. = 700 - 1200 nm) generated by the electron transfer from the Ln(II) ions to the H2O molecules. The identified reaction products are H-2, dissolved LnI(3), and insoluble LnI(OH)(2) (49 - 51% and 48 - 50% yield for DyI2 and NdI2, respectively). The treatment of NdI2 with an H2O solution in THF gives the NdI2OH(thf)(2)center dot 3H(2)O complex and hydrogen.