Photochemical reactions of ammineruthenium(II) complexes

• Published in: Coordination chemistry reviews Vol. 196; no. 1; pp. 281 - 305
• Main Author: Tfouni, Elia
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2000
• Subjects: Ammineruthenium(II) complexes; Photochemical reactions; Photosubstitution; 4-mcp, 1-methyl-4-cyanopyridinium; Photochemical reactions; 2-NCpy, 2-cyanopyridine; Photosubstitution; edta, ethylenediaminetetraacetate; MLCT, metal to ligand charge-transfer; mpz, 1-methylpyrazinium; pz, pyrazine; AsPh 3, triphenylarsine; 3-NCpy, 3-cyanopyridine; ACN, acetonitrile; NCpy, cyanopyridine; en, ethylenediamine; PR 3, phosphine; IL, intra-ligand; Ammineruthenium(II) complexes; PPh 3, triphenylphosphine; 4-NCpy, 4-cyanopyridine; isn, isonicotinamide; P(OR) 3, phosphite; bzn, benzonitrile; LEES, lowest energy excited state; P(OEt) 3, triethylphosphite; TPA, 1,3,5-triaza-7-phosphaadamantane; CT, charge-transfer; SbPh 3, triphenylstibine; py, pyridine; λ irr, irradiation wavelength; CTTS, charge-transfer to solvent; LF, ligand field; 4-acpy, 4-acetylpyridine; cyclam, 1,4,8,11-tetraazacyclotetradecane; py-X, X substituted pyridine; nic, nicotinamide; 3-Clpy, 3-chloropyridine; 4-pic, 4-picoline
• ISSN: 0010-8545; 1873-3840
• DOI: 10.1016/S0010-8545(99)00200-3

A survey is given of the photochemical reactions displayed by ruthenium(II)–amine complexes, except for polypyridyl complexes, and including contributions from this laboratory. The latest review on the subject dates from the early 1980s. Since then, several contributions have appeared in the literature which could be brought and discussed together, giving an updated and unified view of the subject. Spectra and the nature of the excited states relevant for the discussion are described. Reactions will be discussed by type of reaction and of complexes. The reactions will mainly focus on photosubstitution, but will also include quenched and sensitized reactions, as well as eventual photooxidation reactions.