14494-37-2Relevant articles and documents
Reactions of Copper(I) with Micellar Porphyrins and Hemes. Spectroscopic Evidence for Copper(I)-Heme Binuclear Ion Formation
Deardorff, Eugene A.,Carr, Paulette A. G.,Hurst, James K.
, p. 6611 - 6616 (1981)
Addition of cuprous ion to sodium dodecyl sulfate solubilized porphyrins and ferrihemes containing olefinic substituent groups gives rise to spectral perturbations diagnostic of Cu(I) ? complexation.The hemes undergo slow subsequent demetalation in acidic solution, forming porphyrin dications; in the presence of high concentrations of Cu(II) ion the corresponding cupriporphyrins are also formed.For ferriprotoporphyrin IX, the rate of product formation is inversely dependent upon the Cu(II) ion concentration; the data are interpreted in terms of a reaction mechanism, the central feature of which is a dynamic equilibrium between oxidized and reduced hemes, i.e., FeIIIPPIX-CuI + Cu(I) = FeIIPPIX-CuI + Cu(II).This interpretation is supported by the observation that the hemes containing electron-withdrawing substituents in β-pyrrolic positions are extensively reduced to the ferro state by copper(I), but hemes lacking these groups remain primarily ferric when mixed with the cuprous reagent.The reduced Fe(II)-Cu(I) and mixed-valent Fe(III)-Cu(I) binuclear ions are discussed as potential structural models for the oxygen-binding site in cytochrome oxidase.
A copper porphyrin for sensing H2S in aqueous solution via a coordinative-based approach
Mirra, Silvia,Milione, Stefano,Strianese, Maria,Pellecchia, Claudio
, p. 2272 - 2276 (2015)
A turn on fluorescence-based probe for sensing H2S in water via a coordinative-based approach has been successfully devised. The probe can selectively detect H2S in aqueous solutions over other anions, biothiols, and common oxidants such as H2O2. 1H NMR spectroscopy and ESI-MS experiments provide evidence that the turn-on response in the presence of H2S is due to binding of the target anion to the copper center. We devised a new, fast, simple, and cost-effective probe for monitoring hydrogen sulfide. Proof-of-principle results that a copper porphyrin complex can be successfully implemented as a turn-on sensing system for H2S via a coordinative-based approach are reported.
Impact of metal ions in porphyrin-based applied materials for visible-light photocatalysis: Key information from ultrafast electronic spectroscopy
Kar, Prasenjit,Sardar, Samim,Alarousu, Erkki,Sun, Jingya,Seddigi, Zaki S.,Ahmed, Saleh A.,Danish, Ekram Y.,Mohammed, Omar F.,Pal, Samir Kumar
, p. 10475 - 10483 (2014/08/18)
ProtoporphyrinIX-zinc oxide (PP-ZnO) nanohybrids have been synthesized for applications in photocatalytic devices. High-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), and steady-state infrared, absorption, and emission spect
Physicochemical properties of protoporphyrin IX by metal ions in acetonitrile-water mixture solution
Bark, Ki-Min,Yang, Jeong-Im,Lee, Ho-Suk,Lee, Jee-Bum,Park, Chul-Ho,Park, Hyoung-Ryun
experimental part, p. 1633 - 1637 (2010/10/20)
The UV-vis absorption spectrum of protoporphyrin IX shows a very sharp and strong absorption maximum peak at 398 nm in acetonitrile-water mixture solution (1:1 v/v). When divalent metal ions such as Cu2+, Zn2+, and Ca2+ ion were added to protoporphyrin IX, metal protoporphyrin IX complexes were thereby produced. Cu-protoporphyrin IX complexes have the largest formation constant (Kf) among them. The fluorescence intensity of protoporphyrin IX was diminished by the presence of Cu2+ , Zn2+ , Ca2+ , Mn2+ , and Ni2+ ions as quenchers. However, Mg2+ , Mn2+ , and Ni 2+ ions are hardly combined with protoporphyrin IX. Mg2+ ion does not take part in the fluorescence quenching process of protoporphyrin IX in acetonitrile-water mixture solution. According to the Stern-Volmer plots, fluorescence quenching by Cu2+ , Zn2+, and Ca2+ ions involves static quenching, which is due to complex formation. On the contrary, dynamic quenching has a large influence on the overall quenching process, when Mn2+ and Ni2+ ions were added to protoporphyrin IX in acetonitrile-water mixture solution.