41150-80-5Relevant academic research and scientific papers
Di(hydroxo)porphyrin GeIV complex/silica gel composite as visible light-assisted radical generator
Shiragami, Tsutomu,Shiraki, Ryuichi,Makise, Ryuichi,Matsumoto, Jin,Yasuda, Masahide
, p. 874 - 875 (2010)
A composite of di(hydroxo)germaniumporphyrin with silica gel was used as radical generator which oxidized MeOH to HCHO and hydrocarbons to alcohols in aqueous solution.
Formation and structure of alkyl peroxide complexes of germanium(IV) porphyrins from direct reactions with alkyl hydroperoxides and by photolysis of alkylgermanium(IV) porphyrins in the presence of dioxygen
Balch, Alan L.,Cornman, Charles R.,Olmstead, Marilyn M.
, p. 2963 - 2969 (2007/10/02)
TPPGe(OOCH2CH3)2 (TPP is the dianion of tetraphenylporphyrin) which has remarkable thermal stability but is hydrolytically sensitive has been prepared by both reaction of ethyl hydroperoxide with TPPGe(OH)2 and by photolysis of TPPGe(CH2CH3)2 in the presence of dioxygen. The latter reaction involves successive reactions of the two ethyl groups to give TPPGe(OOCH2CH3)(CH2CH3) and TPPGe(OOCH2CH3)2 and the decomposition/hydrolysis products TPPGe(O-H)(CH2CH3) and TPPGe(OH)(OOCH2CH3). X-ray diffraction studies on both TPPGe(OOCH2CH3)2 and TPPGe(OCH2CH3)2 confirm their similar, six-coordinate structures. The ring current shifted 1H NMR resonances of the axial ligands in these complexes are more effective than electronic spectra in monitoring reaction products. Photolysis of TPPGe(OOCH2CH3)2 in toluene produces acetaldehyde and ethanol in ratios that are highly temperature dependent. At 23 °C the acetaldehyde/ethanol ratio is 0.55, while at -70 °C it is 3.5.
Regulated dioxygen affinities by steric restrictions on axial bases in jellyfish type cobalt(II) porphyrins
Uemori, Yoshio,Miyakawa, Hiromasa,Kyuno, Eishin
, p. 377 - 382 (2008/10/08)
The title compounds were prepared to examine the effect of axial base orientation on the dioxygen affinities of (porphyrinato)-cobalt(II) complexes. These porphyrins were derived from meso-tetrakis(2-aminophenyl)porphyrin, with valeramido or pivalamido groups appended on one side of the porphyrin plane as fences in order to control the orientation of the axial base plane, while a nonanediamido or dodecanediamido group is bridged over the other side of the porphyrin plane to inhibit the binding of axial bases. Equilibrium constants in toluene solution are reported for bindings of imidazoles, pyridine, and O2 to the cobalt(II) complexes of these porphyrins. As the steric bulk of the fences increases, the bindings of axial bases are enhanced, while the dioxygen affinities are decreased. These changes in dioxygen affinities are interpreted in terms of the orientation of the axial base plane, which changes the strength of π-electron donation from the axial base to the (porphyrinato)cobalt(II).
