Photocatalytic H2-Production by Complexes Made from Earth Abundant Metals Stabilized by Phosphane-Ligands

Phosphines in artificial photosynthesis: considering different aspects such as chromophores, water reduction catalysts (WRCs), water oxidation catalysts (WOCs), and dyads

“…The fine tuning of the coordination sphere with phosphines such as PR 3 (R = Ph, Bu, Me, anisyl) results in an enhanced hydrogen production through the stabilization effect of the phosphine on the catalytic cycle (Table 2). 122–124,128,129…”

“…Hence the photogenerated Co(I) intermediate emerges as the catalytically active species of the Co(III) precatalyst. 123,124,[126][127][128] During the catalytic pathway, Co(II) and Co(III) intermediates 2 and 4, respectively (Fig. 9), respectively, are formed.…”

“…The latter may bind a proton to produce molecular hydrogen. 128 The ne tuning of the coordination sphere with phosphines such as PR 3 (R ¼ Ph, Bu, Me, anisyl) results in an enhanced hydrogen production through the stabilization effect of the phosphine on the catalytic cycle (Table 2). [122][123][124]128,129 A few years earlier, it was reported by Eisenberg et al that the complex [Co(I){(DO)(DOH)pn}(P(n-Bu) 3 )] bearing n-Bu groups instead of phenyl groups (Fig.…”

“…128 The ne tuning of the coordination sphere with phosphines such as PR 3 (R ¼ Ph, Bu, Me, anisyl) results in an enhanced hydrogen production through the stabilization effect of the phosphine on the catalytic cycle (Table 2). [122][123][124]128,129 A few years earlier, it was reported by Eisenberg et al that the complex [Co(I){(DO)(DOH)pn}(P(n-Bu) 3 )] bearing n-Bu groups instead of phenyl groups (Fig. 7, 2) did not produce hydrogen in the presence of a Pt chromophore, with triethanolamine (TEOA) as a sacricial donor in a MeCN/H 2 O (3 : 2) (v/v) mixture aer 5 h of irradiation.…”