Separation and identification of porphyrin biomarkers from a heavy crude oil Zaap-1 offshore well, Sonda de Campeche, México
作者:Marcela Espinosa、Ubaldo S. Pacheco、Florentino Leyte、Ruben Ocampo
DOI:10.1142/s108842461450028x
日期:2014.7
reported elsewhere [14]. The objective of this investigation was to isolate porphyrins isomers from a single heavy crude oil from the Sonda de Campeche area, in México, and is based on the modified reversed-phase high-performanceliquidchromatography method (RP-HPLC) [9, 11, 12]. Forty vanadylporphyrin isomers, such as nickel porphyrin complexes were successfully isolated for the first time from heavy crude
从原油中分离金属卟啉化合物是一项艰巨的任务,特别是从油藏中分离出来。已知的络合物同源系列类型的硫卟啉 (E)、脱氧红硫卟啉 (DPEP)、四氢苯并脱氧红硫卟啉 (THBD)、苯并氧卟啉 (BE) 和苯并脱氧红硫卟啉 (BD) 的氧钒和镍卟啉,这些化合物在世界各地的原油中都有发现让它很难。这包括在墨西哥原油中发现的天然卟啉,例如来自墨西哥 Sonda de Campeche 的 Ixtal-101、Zaap-1 和 Ceh-1,主要系列 Etio 和 DPEP 的氧钒卟啉混合物也已在其他地方报道 [14]。这项调查的目的是从墨西哥 Sonda de Campeche 地区的单一重质原油中分离卟啉异构体,并且基于改进的反相高效液相色谱法 (RP-HPLC) [9, 11, 12]。40 种钒氧卟啉异构体,如镍卟啉配合物,首次成功地从重质原油 Zaap-1 中分离出来,通过一项详尽的工作,包括将
Paley's watchmaker analogy and prebiotic synthetic chemistry in surfactant assemblies. Formaldehyde scavenging by pyrroles leading to porphyrins as a case study
作者:Eric J. Alexy、Carl W. Hintz、Hubert M. Hughes、Masahiko Taniguchi、Jonathan S. Lindsey
DOI:10.1039/c5ob01409c
日期:——
The formation of elaborate molecules is regarded as an essential first step in prebiotic chemistry, but how such transformations could spontaneously occur, particularly in dilute aqueous conditions, remains poorly understood. Here, micromolar concentrations of a 3,4-dialkylpyrrole and excess formaldehyde in aqueous micellar solution (pH 7) at 25 or 50 °C were found to give good yield (up to 40%) of
Treatment of 5,5′-dicarboxy-3,3′,4,4′-tetraalkyl-2,2′-dipyrromethanes with trifluoroacetic acid and subsequent oxidation resulted in formation of meso-trifluoromethyl-substituted β-octaalkylporphyrins. The structural characterizations and the spectroscopic measurements revealed their distorted conformations and red-shifted absorption bands depending on the steric bulkiness. Moreover, the corresponding Ni complexes were easily afforded and exhibited enhanced nonplanarities.
The meso-reactivity of porphyrins and related compounds. Part IV. Introduction of oxygen functions
作者:R. Bonnett、M. J. Dimsdale、G. F. Stephenson
DOI:10.1039/j39690000564
日期:——
Treatment of octaethylporphyrin with hydrogen peroxide in concentrated sulphuric acid in the cold gives a monoxy-derivative: the earlier structures advanced for this type of compound are disproved, and this particular example is formulated as 2,3,7,8,12,13,18,18-octaethyl-17-oxochlorin. By-products are observed, one of which is formulated as a dioxo-b-tetrahydroporphyrin.
Gallium(III) porphyrins: synthesis and physicochemical characteristics of halogeno gallium(III) porphyrins—X-ray crystal structure of chloro-(5,10,15,20-tetraphenylporphyrinato) gallium(III)
Chlorogallium(III) porphyrins [Ga(Por)Cl] were obtained in good yield by treating the corresponding free bases with gallium trichloride. The action of the hydrogen halides HX (X = F or I) on cloro derivatives Ga(Por)Cl led to the corresponding halogeno complexes Ga(Por)X. These derivatives were characterized on the basis of mass spectrometry, 1H NMR, and UV-visible data. The crystalstructure of the title
通过用三氯化镓处理相应的游离碱,可以得到高产率的氯鎓(III)卟啉[Ga(Por)Cl]。卤化氢HX(X = F或I)对氯代衍生物Ga(Por)Cl的作用导致形成相应的卤代配合物Ga(Por)X。这些衍生物是根据质谱,1 H NMR和紫外可见数据进行表征的。标题化合物的晶体结构已经通过X射线衍射法确定。C 44 N 4 H 28 GaCl [Ga(TPP)Cl],F w = 717.9 g,四方,I m / m,a = 13.508(2)Å,c = 9.846(2)Å,V = 1797(3)埃3,ž = 2,d X = 1.326,μ=11.1厘米-1,˚F(000)= 736 ,室温,- [R (˚F)= 0.044,[R瓦特(˚F)为1237个的独特反射= 0.049。Ga(TPP)Cl与Fe(TPP)Cl是同构的:镓和氯原子均由晶体镜面统计平均。镓与氯的距离为2.196(2),而镓原子距离理想卟啉平面为0