Figure 7
The electronic absorption spectra recorded in methanol at room temperature. In part (a), (A) is diphenylphosphinic acid (DPPA) as acceptor (1 × 10−4 M), (B) is donor–acceptor compound 1 and (C) is 2-amino-5-chloropyridine (AMPY, X = Cl) as donor (1 × 10−4 M). In part (b), (A) is diphenylphosphinic acid (DPPA) as acceptor (1 × 10−4 M), (B) is donor–acceptor compound 2 and (C) is 2-amino-5-cyanopyridine (AMPY, X = CN) as donor (1 × 10−4 M). In part (c), (A) is diphenylphosphinic acid (DPPA) as acceptor (1 × 10−4 M), (B) is donor–acceptor compound 3 and (C) is 2-amino-5-methylpyridine (AMPY, X = CH3) as donor (1 × 10−4 M). |