Palladium‐catalyzed alkylation of the cyclopentenediol derivative (I) is a useful method for enantiodivergent functionalization resulting in both enantiomeric series (III) and (XII) of chiral building blocks.
An unexpected ruthenium(ii)-deuteroporphyrin 4-aminothiophenol (4-ATP) thiolester derivative (Ru-4ATPP) was obtained by the condensation of 4-ATP with carbonyl[13,17-bis(propanoic acid)-2,7,12,18-tetramethylporphyrinato] ruthenium(ii). Ru-4ATPP was self-assembled on Au(111) surfaces through the terminal amino groups, as shown by cyclic voltammetry (CV) and confirmed by X-ray photoelectron spectroscopy (XPS). A slow and incomplete isomerisation process of the self-assembled 4-RuATPP thiolester to its amido analogue was observed, due to the catalytic effect of the gold surface. Consequently, the formed amido isomer of Ru-4ATPP became self-assembled on Au(111) through the resulting terminal thiolate groups, a condition characterized by CV reductive desorption (peak at ca. -0.7 eV) and XPS (S2p peaks at 162.1 and 163.3 eV)
A new ruthenium(II) porphyrin disulphide derivative, [ Ru ( Pds )( CO )], was obtained from ruthenium(II)(carbonyl)deuteroporphyrin(IX), [ Ru ( DPdc )( CO )] and cystamine. The interaction of this complex with nitric oxide was studied spectrophotometrically and a bathochromic shift of the charge transfer band and considerable change in the α and β bands of the complex were observed. According to the IR spectrum, the product of this interaction is [ Ru ( DmDP )( NO +)( NO 2-)]. [ Ru ( Pds )( CO )] was then self-assembled on polycrystalline gold and characterized by X-ray photoelectron spectroscopy. [ Ru ( Pds )( CO )] was also self-assembled on gold electrode beads and its interaction with nitric oxide in aqueous solution was studied by cyclic voltammetry. A shift in the ruthenium redox process and a new irreversible cathodic peak at -0.59 V were observed, both indicating coordination of NO .
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