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Nanosecond transient absorption spectra of (a) NI-PTZ-F-O (c = 4.0 × 10−5 M), (b) NI-PTZ-Ph-O (c = 4.0 × 10−5 M), (c) NI-PTZ-C5-O (c = 4.0 × 10−5 M), and (d) F-NI-Br (c = 2.0 × 10−5 M). The corresponding decay traces are (e) NI-PTZ-F-O (c = 4.0 × 10−5 M), (f) NI-PTZ-Ph-O (c = 4.0 × 10−5 M), (g) NI-PTZ-C5-O (c = 4.0 × 10−5 M), and (h) F-NI-Br (c = 2.0 × 10−5 M) in deaerated ACN at 460 nm. λex = 355 nm, 20 °C.
