间位取代四苯基卟啉铁(Ⅲ)的紫外可见光谱及其与二乙胺轴配反应的研究

STUDY ON AXIAL COORDINATION OF META-SUBSTITUTED (TETRAPHENYL-PORPHINATO) IRON(Ⅲ) CHLORIDE AND THEIR UV-VIS SPECTRA

研究了二氯甲烷溶液中二乙胺(L)与氯合(meso-四-间甲基苯基卟啉)铁(Ⅲ)的轴向配位反应.用光谱法测得不同温度下反应的平衡常数,求得(m-CH_3)TPPFe(Ⅲ)Cl+L=(m-CH_3)TPPFe(Ⅲ)Cl·L反应的标准摩尔焓和摩尔熵.同时,对反应的动力学与反应机理进行了研究.也研究了反应物和产物的紫外可见光谱,并讨论了取代基及轴向配体对铁卟啉紫外可见光谱的影响。

The axial coordination reaction of tctra(mcta-mcthylphcnyl) porphinatoiron(Ⅲ) chloride with dicthylaminc(L) in dichloromcthanc was reported in this paper. The equilibrium constants were measured by spectral technique and the standard change of molar enthalpy(ΔrHm ) and molar entropy(ΔrSm ) of the reaction were calculated. On the other hand, the kinetics of the reaction was also studied and the mechanism was supposed as follows: Fc(Ⅲ)P+L Fe(Ⅲ)PL Last, the UV-Vis spectra of meta-substitute tetraphenylporphinato iron(Ⅲ) chloride were measured by means of Bekman Du 8B Spcctrophotomctcr and the effects of the substitucnts in the porphyrin and axial ligand to the spectra were discussed.