Six quinine-porphyrin Mn? complexes was synthesized by a certain of new chiral quinine-porphyrin.Their catalytic properties for the epoxidation of olefins in two-phase system (CH 2Cl 2/H 2O) were studies.The result in...Six quinine-porphyrin Mn? complexes was synthesized by a certain of new chiral quinine-porphyrin.Their catalytic properties for the epoxidation of olefins in two-phase system (CH 2Cl 2/H 2O) were studies.The result indicated these not only can enhance catalyzing activity,but also showed obvious phase-transfer function.That the reaction condition had affacfed the results of epoxidation.展开更多
A hyperbranched supramolecular polymer(HSP)is constructed based on the intermolecular inclusion complexation of bridged tris(permethyl-β-cyclodextrin)with Mn^(Ⅲ)-porphyrin bearing poly(ethylene glycol)(PEG)side chai...A hyperbranched supramolecular polymer(HSP)is constructed based on the intermolecular inclusion complexation of bridged tris(permethyl-β-cyclodextrin)with Mn^(Ⅲ)-porphyrin bearing poly(ethylene glycol)(PEG)side chains(Mn^(Ⅲ)-TPP),and characterized by UV/vis absorption spectroscopy,isothermal titration calorimetry(ITC),NMR,dynamic light scattering(DLS),atomic force microscopy(AFM)and transmission electron microscopy(TEM),respectively.The presence of permethyl-β-cyclodextrin can stabilize the low-valent Mn^(II)-TPP.In vitro cell experiment indicates that this HSP has no remarkable cellular toxicity against NIH 3T3 cells.In vitro MR imaging experiment indicates a slightly increased T_(1) relaxivity for this HSP compared to that for the linear supramolecular polymer.展开更多
Manganese (Ⅲ)-porphyrins and iron (Ⅳ)-porphyrins are isoelectronic, and the latter isan important intermediate of all kinds of hemoglobins during catalytic process. A thoroughundrstanding of Mn porphyrins would be v...Manganese (Ⅲ)-porphyrins and iron (Ⅳ)-porphyrins are isoelectronic, and the latter isan important intermediate of all kinds of hemoglobins during catalytic process. A thoroughundrstanding of Mn porphyrins would be valuable in sorting out the closely related and bi-ologically important Fe system, as well as for the general undrstanding of metalloporphyrinspectra and structures because of its unusual electronic structure. Mn(Ⅲ)展开更多
文摘Six quinine-porphyrin Mn? complexes was synthesized by a certain of new chiral quinine-porphyrin.Their catalytic properties for the epoxidation of olefins in two-phase system (CH 2Cl 2/H 2O) were studies.The result indicated these not only can enhance catalyzing activity,but also showed obvious phase-transfer function.That the reaction condition had affacfed the results of epoxidation.
基金We thank the 973 Program(No.2011CB932500)the NNSFC(Nos.20932004,21372128 and 91227107)for financial support.
文摘A hyperbranched supramolecular polymer(HSP)is constructed based on the intermolecular inclusion complexation of bridged tris(permethyl-β-cyclodextrin)with Mn^(Ⅲ)-porphyrin bearing poly(ethylene glycol)(PEG)side chains(Mn^(Ⅲ)-TPP),and characterized by UV/vis absorption spectroscopy,isothermal titration calorimetry(ITC),NMR,dynamic light scattering(DLS),atomic force microscopy(AFM)and transmission electron microscopy(TEM),respectively.The presence of permethyl-β-cyclodextrin can stabilize the low-valent Mn^(II)-TPP.In vitro cell experiment indicates that this HSP has no remarkable cellular toxicity against NIH 3T3 cells.In vitro MR imaging experiment indicates a slightly increased T_(1) relaxivity for this HSP compared to that for the linear supramolecular polymer.
基金Project supported by the National Natural Science Foundation of China.
文摘Manganese (Ⅲ)-porphyrins and iron (Ⅳ)-porphyrins are isoelectronic, and the latter isan important intermediate of all kinds of hemoglobins during catalytic process. A thoroughundrstanding of Mn porphyrins would be valuable in sorting out the closely related and bi-ologically important Fe system, as well as for the general undrstanding of metalloporphyrinspectra and structures because of its unusual electronic structure. Mn(Ⅲ)
