Fig. 2: Evidence for Ni(I) formation upon irradiation of the Ni/Ir/lut mixture.
From: Photolytic activation of Ni(II)X2L explains how Ni-mediated cross coupling begins
A Scheme describing Ni(II)-Cl bond photolysis resulting from energy transfer from the Ir PS excited state. Downstream reactivity of the Ni(I) and Cl• photo-products will be elucidated in depth in a later section of this work. B Double difference UV-vis spectrum of the Ni/Ir/lut mixture after illumination with a 405 nm LED (216 mW cm−2) (left axis). Ni(I)Cl(dtbbpy) as produced by comproportionation (right axis, see SI, Fig. S8, for further details). C Continuous wave EPR difference spectrum (t = 0 subtracted) for the Ni/Ir/lut mixture at t = 30 min irradiation with a 405 nm LED (128 mW cm−2). EPR conditions: temperature T = 5 K, microwave power P = 0.1 mW, microwave frequency F = 9.372 GHz. For EPR experimental details and additional time points, See SI, Figs. S92–93.
