Fig. 1.

1H NMR spectra in D2O: (A) proflavine hemisulfate, pD 4.5; (B) [Pd(terpy)(proflavine)](NO3)(HSO4), pD 5.0; (C) [Pd(en)(proflavineH)](NO3)(SO4), pD 5.0.

1H NMR spectra in D2O: (A) proflavine hemisulfate, pD 4.5; (B) [Pd(terpy)(proflavine)](NO3)(HSO4), pD 5.0; (C) [Pd(en)(proflavineH)](NO3)(SO4), pD 5.0.