通过使氯四苯基卟啉铁(III)(TPPFe III Cl)穿过中性氧化铝色谱柱,合成了十四种取代的μ-氧代-双[四苯基卟啉铁(III)]衍生物([TXPPFe III ] 2 O),其中九种用于环己烷中在适当的条件下用PhIO作为新型催化剂进行羟基化反应。实验表明,产率,速率常数k的环己烷羟基化反应与卟啉环上取代基的特征常数σ,表征取代基的电子效应和空间效应的物理常数成线性关系,并且反应的产物分布和动力学性质取决于反应温度,溶剂以及空气。与单铁卟啉TPPPe III Cl相比,μ-氧代-双铁卟啉[TPPFe III ] 2 O在中等条件下显示出更好的催化环化作用,用PhIO催化环己烷羟基化,并且对PhIO稳定。研究结果表明,μ-氧代-双铁卟啉可以用作细胞色素P-450单加氧酶的模型化合物。
Models of the cytochromes b. 5. EPR studies of low-spin iron(III) tetraphenylporphyrins
作者:F. Ann Walker、David Reis、Virginia L. Balke
DOI:10.1021/ja00335a003
日期:1984.11
Etude des spectres RPE d'une large serie de complexes de tetraphenylporphyrine du Fer(III) en fonction du solvant, du type et de la basicite du coordinat, des substituants de la porphyrine, de la liaison covalente des coordinats axiaux et de la coordination du coordinat axial mixte
Etude des specters RPE d'une large serie de complexes de tetraphenylporphyrine du Fer(III) en fonction du solvant, du type et de la basicite du coordinat, des substituants de la porphyrine, de la liaison covalente des coordinats axiaux et de lacoordinat du坐标轴向混合
A new general one-pot method for the synthesis of various metalloporphyrins has been developed from pyrrole and substituted aldehydes using transition metal salts. This method allows higher working concentrations than those previously reported. Along with the reported metalloporphyrins, some new metalloporphyrins were synthesized in good yield.
Catalytic Aerobic Oxidation of Biomass-based Furfural into Maleic Acid in Aqueous Phase with Metalloporphyrin Catalysts
作者:Yi Huang、Chunyan Wu、Wenwen Yuan、Yongmei Xia、Xiang Liu、Huamei Yang、Haijun Wang
DOI:10.1002/jccs.201700004
日期:2017.7
Catalyticoxidation of renewable furfural into valuable maleicacid in aqueous solutions using metalloporphyrin catalysts was investigated for the first time. The synthesized catalysts were characterized by FT‐IR, UV–vis, 1H NMR, elemental analysis, and TGA. The catalysts varied in metal active sites and functional groups, which had different effects on their catalytic activity. Furthermore, the effects
首次研究了使用金属卟啉催化剂将可再生糠醛催化氧化为有价值的马来酸。通过FT-IR,UV-vis,1 H NMR,元素分析和TGA对合成的催化剂进行了表征。催化剂的金属活性位和官能团各不相同,这对它们的催化活性有不同的影响。此外,详细研究了温度,反应时间,催化剂负载量和氧气压力的影响。通过在最佳条件下使用FeT(p-Cl)PPCl作为催化剂,可以以44%的产率获得马来酸。最后,FeT(p-Cl)PPCl可以连续五次重复使用,而不会显着降低活性。
Iron-based metalloporphyrins as efficient catalysts for aerobic oxidation of biomass derived furfural into maleic acid
作者:Yongdi Xie、Yi Huang、Chunyan Wu、Wenwen Yuan、Yongmei Xia、Xiang Liu、Haijun Wang
DOI:10.1016/j.mcat.2018.03.018
日期:2018.6
A series of porphyrin type catalysts with the metal active sites of Fe were prepared and investigated in aerobicoxidation of biomass-based furfural to maleic acid (MAD) in aqueous phase. The catalytic performance of meso-tetrakis(4-bromophenyl)porphyrin iron (III) chloride (FeT(p-Br)PPCl) immobilized on different supports was evaluated. It was interesting to find that the catalytic activity varied
that not only electron-withdrawing but also electron-donating substituents improved the catalytic performance of iron μ-oxo complexes. Moreover, catalyticactivity of iron μ-oxo porphyrins with electron-withdrawing substituents correlated with the half-wave potential E1/2 while the catalyticactivity of iron μ-oxo porphyrins with electron-donating substituents increased with the decrease of reduction