caa a22 4500 465807925 CHVBK 20180323112108.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00943886 doi (NATIONALLICENCE)springer-10.1007/BF00943886 Ligand substitution in a transition metal complex: a new type of photocatalytic reaction in a semiconductor [Elektronische Daten] [A. Kryukov, Yu. Kholodenko, S. Kuchmii] We show that a semiconductor can serve as a photocatalyst for the ligand substitution reaction in coordination compounds of chromium(III). The mechanism of the process includes stages of generation of an "electron-hole” pair upon action of light quanta with energy equal to (or greater than) the width of the forbidden gap in the semiconductor, capture of the electron from the conduction band by the chromium(III) complex, fast ligand substitution in the chromium(II) complex formed by a solvent molecule, and oxidation of the chromium(II) complex by the hole from the valence band. The reaction of aquation of the complex ions [CrCl2(H2O)4]+ proceeds when using the semiconductors (CdS, GaAs), whose conduction band is located in the more negative potential region compared with the standard oxidation-reduction potential of the Cr(III)/Cr(II) pair. We show that the reaction rate is slowed down when electron acceptors (oxygen) and hole acceptors (ethanol) are introduced, which confirms the proposed mechanism. Plenum Publishing Corporation, 1990 Kryukov A. L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut Kholodenko Yu L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut Kuchmii S. L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 26/1(1990-01-01), 81-84 0040-5760 26:1<81 1990 26 11237 https://doi.org/10.1007/BF00943886 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00943886 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kryukov A. L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut NATIONALLICENCE 700 1- Kholodenko Yu L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut NATIONALLICENCE 700 1- Kuchmii S. L. V. Pisarzhevskii Institute of the Physical Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev aut NATIONALLICENCE 773 0- Theoretical and Experimental Chemistry Kluwer Academic Publishers-Plenum Publishers 26/1(1990-01-01), 81-84 0040-5760 26:1<81 1990 26 11237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer