6-Deoxy- 6-iodo-β-cyclodextrin (1) reacted with 5-(p-aminophenyl)-10, 15,20-triphenyl porphyrin(2), 5-(p-aminophenyl)-10,15,20-triphenyl nickel(Ⅱ) porphyrin [NiⅡTPPNH2P](3),5-(p-aminophenyl)-10,15,20-triphenyl mang...6-Deoxy- 6-iodo-β-cyclodextrin (1) reacted with 5-(p-aminophenyl)-10, 15,20-triphenyl porphyrin(2), 5-(p-aminophenyl)-10,15,20-triphenyl nickel(Ⅱ) porphyrin [NiⅡTPPNH2P](3),5-(p-aminophenyl)-10,15,20-triphenyl manganese(Ⅲ) porphyrin [MnⅢTPPNH2P] (4) and 5-(p-aminophenyl)-10,l5,20-triphenyl carbonyl ruthenium porphyrin [RuⅡ (CO)TPPNH2P] (5) to generate the compounds 6-9, respectively. Those new compound 5-9 have been identified by 1H NMR, IR, MS and UV-visible spectra and elemental analysis.展开更多
The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic...The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The antioxidant activity of complexes was estimated by means of the electrochemical assay based on the hydrogen atom transfer reaction to the stable radical 2,2’-diphenyl-1-picrylhydrazyl (DPPH). The RDE method was applied for this process monitoring. It was shown that the efficiency of the metal complexes (Cu2+,Co2+,Mn2+,Ni2+,Fe3+) is practically the same order as that of free base porphyrin 1. However the Zn2+ complex demonstrates significantly higher antioxidant activity, and the stoichiometry of the reaction was determined as σ = 4. The results demonstrate that porphyrin macrocycle can directly affect the antioxidant properties of 2,6-diisobornylphenol.展开更多
Reactions of 5-(p-aminophenyl)-10, 15, 20-triphenyl porphyrin (1) withRu_3(CO)_(12) or M(OCOCH_3)_2 (M= Ni, Mn) afforded metalloporphyrins (4―6), respectively.6-Deoxy-6-io-do-β-cyclodextrin (2) and mono (6-O-trifluo...Reactions of 5-(p-aminophenyl)-10, 15, 20-triphenyl porphyrin (1) withRu_3(CO)_(12) or M(OCOCH_3)_2 (M= Ni, Mn) afforded metalloporphyrins (4―6), respectively.6-Deoxy-6-io-do-β-cyclodextrin (2) and mono (6-O-trifluoromethanesulfonyl) pennethylatedβ-cyclodextrin (3) reacted with complexes 4―6 to give β-cyclodextrin bonded metal porphyrins(7―9) and permethylated β-cyclodextrin bonded me-tal porphyrins (10―12) respectively. These newcomplexes were identified by MS, IR, UV-visible and ~1H NMR spectra, and elemental analysis.展开更多
借鉴美国LosAlamos国家实验室报告的应用于燃料电池氧电极的新型Co-PPy-C(PPy,polypyrrole)复合物催化材料,提出Co-PAn-C(PAn,polyaniline)复合材料可能对氧的电化学还原也具有催化活性,并首次制备出Co-PAn-C复合催化材料.发现Co-PAn-C...借鉴美国LosAlamos国家实验室报告的应用于燃料电池氧电极的新型Co-PPy-C(PPy,polypyrrole)复合物催化材料,提出Co-PAn-C(PAn,polyaniline)复合材料可能对氧的电化学还原也具有催化活性,并首次制备出Co-PAn-C复合催化材料.发现Co-PAn-C对氧还原有显著的催化效果,碱性介质中氧气气氛下,电极电位为-0.2 V vs.Hg/HgO时电流密度达到128mA·cm-2,性能也比较稳定.初步研究了Co-PAn-C对ORR(oxygen reduction reaction)的催化机理,可能是在结构中形成了Co-N活性位置,影响了氧和反应中间产物在电极上的吸附和脱附过程.展开更多
文摘6-Deoxy- 6-iodo-β-cyclodextrin (1) reacted with 5-(p-aminophenyl)-10, 15,20-triphenyl porphyrin(2), 5-(p-aminophenyl)-10,15,20-triphenyl nickel(Ⅱ) porphyrin [NiⅡTPPNH2P](3),5-(p-aminophenyl)-10,15,20-triphenyl manganese(Ⅲ) porphyrin [MnⅢTPPNH2P] (4) and 5-(p-aminophenyl)-10,l5,20-triphenyl carbonyl ruthenium porphyrin [RuⅡ (CO)TPPNH2P] (5) to generate the compounds 6-9, respectively. Those new compound 5-9 have been identified by 1H NMR, IR, MS and UV-visible spectra and elemental analysis.
文摘The complexes of biogenic metals (Zn2+,Cu2+,Co2+,Mn3+,Fe3+) based on meso-tetra(3,5-diisobor- nyl-4-hydroxyphenyl)porphyrin 1 were synthesized. The electrochemical behavior of these com-pounds was studied using cyclic voltammetry (CV) and rotating disk electrode (RDE) techniques. The antioxidant activity of complexes was estimated by means of the electrochemical assay based on the hydrogen atom transfer reaction to the stable radical 2,2’-diphenyl-1-picrylhydrazyl (DPPH). The RDE method was applied for this process monitoring. It was shown that the efficiency of the metal complexes (Cu2+,Co2+,Mn2+,Ni2+,Fe3+) is practically the same order as that of free base porphyrin 1. However the Zn2+ complex demonstrates significantly higher antioxidant activity, and the stoichiometry of the reaction was determined as σ = 4. The results demonstrate that porphyrin macrocycle can directly affect the antioxidant properties of 2,6-diisobornylphenol.
文摘Reactions of 5-(p-aminophenyl)-10, 15, 20-triphenyl porphyrin (1) withRu_3(CO)_(12) or M(OCOCH_3)_2 (M= Ni, Mn) afforded metalloporphyrins (4―6), respectively.6-Deoxy-6-io-do-β-cyclodextrin (2) and mono (6-O-trifluoromethanesulfonyl) pennethylatedβ-cyclodextrin (3) reacted with complexes 4―6 to give β-cyclodextrin bonded metal porphyrins(7―9) and permethylated β-cyclodextrin bonded me-tal porphyrins (10―12) respectively. These newcomplexes were identified by MS, IR, UV-visible and ~1H NMR spectra, and elemental analysis.
文摘借鉴美国LosAlamos国家实验室报告的应用于燃料电池氧电极的新型Co-PPy-C(PPy,polypyrrole)复合物催化材料,提出Co-PAn-C(PAn,polyaniline)复合材料可能对氧的电化学还原也具有催化活性,并首次制备出Co-PAn-C复合催化材料.发现Co-PAn-C对氧还原有显著的催化效果,碱性介质中氧气气氛下,电极电位为-0.2 V vs.Hg/HgO时电流密度达到128mA·cm-2,性能也比较稳定.初步研究了Co-PAn-C对ORR(oxygen reduction reaction)的催化机理,可能是在结构中形成了Co-N活性位置,影响了氧和反应中间产物在电极上的吸附和脱附过程.
