Two new half‐sandwich Ru (II)(p‐cymene) complexes (1 and 2) containing dopamine‐based (N, O) Schiff base ligands (L1H and L2H) were synthesized and characterized by FT‐IR, UV–Visible and 1H & 13C NMR spectral techniques, and elemental analyses. The spectroscopic and analytical data revealed monobasic bidentate coordination of the ligands with Ru ion. The molecular structures of L1H, L2H and 2 were further confirmed by single crystal X‐ray diffraction study. Complexes 1 and 2 have been employed as catalysts in the transfer hydrogenation of ketones using 2‐propanol as a hydrogen source at 85 °C under base‐free condition. Good to the excellent yield of secondary alcohols, gram scale synthesis, and high TON and TOF made this catalytic system interesting.

Visible‐light‐active coordination metallopolymer and metal‐organic frameworks have gained substantial attention in recent years, owing to their tunable electronic properties. Herein, we present a novel copper‐ion‐containing metallopolymer, which exhibits visible‐light absorption and p‐type photoelectrochemical behavior. The functional thiadiazole‐based metallopolymer thin films were prepared by using both chemical and electrochemical methods on fluorine‐doped tin oxide substrates. XPS, Raman, and FTIR spectral investigations evidence the presence of Cu(II), Cu(I), Cu−S, and disulfide (S−S)2− linkages in the polymeric network. The swift photoresponses, repeatable photovoltage of approximately 55 mV with zero applied current, and high photocurrent values at different bias potentials (ca. 24 μA cm−2 @ −0.6 V vs. Ag/AgCl in 0.1 KCl) in acidic electrolytes (0.5 M H2SO4) suggest that this metallopolymer as an acid‐stable p‐type photocathode material. In contrast, the electropolymerized non‐metallated polymers exhibit n‐type photoactivity. Photoelectrochemical sensing studies reveal the analyte‐induced reduction in photoactivity.