... (2) This subject has been repeatedly reviewed, along with the hoto- chemistry of other compounds containing the N-oxide functi0n.8~ (3) Albini, A,; Alpegiani, M. Chem. ... (c) Fabian, J.; Hartmann, H. 'Light Absorption of Organic Colorants”; Springer-Verlag: Berlin, 1980. ... J. Org. ...