Publications by authors named "Isao Aritome"
The interesting redox properties and reactivity of metalloporphycene have been studied for decades; however, the detailed experimental investigation on the reactivity and reaction mechanism under inert condition combined with theoretical calculations had not been performed so far. In this study, the novel reactivity of the reduced form of the cobalt porphycene with alkyl halides to form cobalt-carbon (Co-C) bonds was revealed. Under electrochemical reductive conditions, not the central cobalt, but the ligand was reduced and reacted with alkyl halides to afford the cobalt-alkyl complexes under N atmosphere in a glovebox.
View Article and Find Full Text PDFA heavy atom, bromine, was directly substituted into the porphycene macrocycle to promote intersystem crossing by way of spin-orbit coupling. The singlet oxygen production ability of the porphycene is dramatically enhanced, and the highest value of 0.95 for the quantum yield of singlet oxygen generation (PhiDelta) was obtained for the dibrominated porphycene by visible light excitation.
View Article and Find Full Text PDFThe title compound, C14H10Cl2, crystallizes as colourless prisms with two symmetry-independent molecules in the unit cell. Numerous intermolecular C-H..
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- The study presents the synthesis and characterization of new fluorine-containing iron porphycenes, specifically a compound with trifluoromethyl groups.
- The crystal structure of the dimer shows significant distortion due to the steric and electronic effects of these CF(3) groups.
- The new compound exhibits unique electronic properties, including altered oxidation/reduction potentials and a tendency to convert to a ferrous complex in a specific solvent, highlighting its electron-deficient nature.
Article Synopsis
- A new fluorine-containing porphycene called beta-tetrakis(trifluoromethyl)porphycene has been discovered, showcasing a unique structure due to four CF(3) substituents.
- This macrocycle exhibits a significant stabilization of the lowest unoccupied molecular orbital (LUMO) energy level by 1.24 V compared to etioporphyrin, indicating its electron-deficient characteristics.
- The study also observed that adding DBU resulted in the deprotonation of the inner NH proton in the porphycene, highlighting its chemical reactivity.
[reaction: see text] N-Confused porphyrin (NCP) bearing pentafluorophenyl groups at meso-positions, which were obtained from N-confused dipyrromethane in ca. 20% yield, can form Cu(II) complex as well as Ag(III), Ni(II), and Pd(II) complexes. The square-planar structures of all these metal complexes were elucidated by X-ray single-crystal analyses.
View Article and Find Full Text PDFThe title compound [systematic name: 3,10,13,20-tetrabromo-4,9,14,19-tetrapropyl-21,22,23,24-tetraazapentacyclo[16.2.1.
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