Red and green chemiluminescence of Na, Mg, and lanthanide triphenylmethyl derivatives during oxidation by dioxygen and cerium(IV)
摘要:
Chemiluminescence (CL) of triphenylmethyl organometallics (TPM), Ph3CNa, Ph3CMgCl, and Ph(3)CLnCl(2) (Ln = Cd, Eu, and Dy), in THF and toluene during oxidation by O-2 and the (NH4)(2)Ce(NO3)(6) complex was found. The first CL is caused by the luminescence of two emitters: (Ph3C.)*, emitting in the green spectral region (lambda(max) = 524, 550 nm), and an unstable product of substitution of the hydrogen atom in the phenyl ring of the Ph3C. radical, emitting in the red region (lambda(max) = 580+/-20 nm). The emitter of the second CL, Ph3C. *, is generated in the elementary electron transfer from the Ph3C- anion to Ce-IV, reducing the latter to Ce-III