20910-35-4

Usage

Compound Class

Porphyrins

Structure

Macrocyclic compounds containing four pyrrole rings connected by methine bridges

Application (1)

Catalyst in chemical reactions

Application (2)

Sensor for detecting metal ions

Application (3)

Fluorescence probe for studying biological systems

Versatility

Unique structure and properties make it valuable in chemistry, biology, and materials science.

InChI:InChI=1/C36H44N4.Mg/c1-9-21-22(10-2)30-18-32-25(13-5)26(14-6)34(39-32)20-36-28(16-8)27(15-7)35(40-36)19-33-24(12-4)23(11-3)31(38-33)17-29(21)37-30;/h17-20H,9-16H2,1-8H3;/q-2;+2/b29-17-,30-18-,31-17-,32-18-,33-19-,34-20-,35-19-,36-20-;

Upstream product

• 100-25-4 1,4-dinitroanthracene radical anion 
• 56571-41-6 cation radical of magnesium octaethylporphyrin 
• 2683-82-1 2,3,7,8,12,13,17,18-octaethyl-porphyrin 

Downstream Products

• 82318-26-1 10-benzoyloxy-2,3,7,8,12,13,17,18-octaethyl-5,15-bis(1-imidazolyl)porphyrin 
• 19512-49-3 5-benzoyloxy-2,3,7,8,12,13,17,18-octaethylporphyrin 
• 72091-40-8 2,3,7,8,12,13,17,18-octaethyl-5-(1-imidazolyl)porphyrin 
• 2683-82-1 2,3,7,8,12,13,17,18-octaethyl-porphyrin 

Relevant academic research and scientific papers

Hydroxide Complex of the Magnesium Octaethylporphyrin Cation: Spectrum and Formation Constant in Alcohol-Water Solvents

The formation of the complex between photogenerated magnesium octaethylporphyrin cation and hydroxide has been studied in mixed alcohol/water solvents.This complex has been postulated as a participant in the transport of hydroxide and/or hydrogen ion across bilayer lipid membranes.The absorption spectrum of the complex (λmax = 665 nm) is red shifted from that of the cation (λmax = 680 nm) in both methanol/water (M/W) and ethanol/water (E/W) solvents.The formation constants for the complex in the two solvent systems are 16 (in M/W) and 190 M-1 (in E/W).The difference in the two constants is too great to be explained entirely by the Born equation (with correction for ion screening) in which the dielectric constant of the solvent system is the pertinent variable.Differential solvation effects appear to be involved.The rate constants, k2, for the reaction of the cation with the p-dinitrobenzene anion, p-DNB- (p-DNB is the electron acceptor for the photogeneration of the magnesium octaethylporphyrin cation), and k4, for the reaction of the complex with p-DNB-, are 1.1*109 and 2.1*109 M-1 s-1 in M/W and 1.3*109 and 1.2*109 M-1 s-1 in E/W.Although the rate constants are within an order of magnitude of being diffusion controlled, the fact that k 4% >= k2 is indicative of some degree of activation control.

Electron Transfer Reaction from Dimethylanilines to Cation Radical of Magnesium Octaethylporphyrin

A kinetic study of electron transfer reaction from dimethylanilines to cation radical of magnesium octaethylporphyrin reveals that two mechanisms are operating depending on the redox potentials of dimethylanilines.

Qy-excitation resonance raman spectra of chlorophyll a and related complexes. Normal mode characteristics of the low-frequency vibrations

Qy-excitation resonance Raman (RR) spectra are reported for film aggregates of chlorophyll (Chl) a and a series of related complexes. The latter include Mg(II) octaethylporphyrin (MgOEP), Mg(II) trans-octaethylchlorin (MgOEC), methyl-9-desoxomesopyrochlorophyllide (DMPChl) a, and methylpyrochlorophyllide (MPChl) a. These complexes represent a series in which the structural complexities of Chl a (saturated pyrrole ring, isocyclic ring, C9-keto group, C2-vinyl group, and C10-carbomethoxy group) are systematically added to the basic tetrapyrrole architecture. On the basis of comparison of the RR scattering characteristics of the different complexes and the predictions of semiempirical normal coordinate calculations, a self-consistent set of vibrational assignments has been developed for all the RR active modes in the low-frequency regime (100-1000 cm-1). The studies indicate that the low-frequency vibrations encompass a diverse set of motions that include both the ring skeleton and peripheral substituent groups. However, modes in the very low-frequency regime (-1) are primarily due to deformations of the substituent groups. Collectively, the normal mode characteristics of Chl a and the other Mg(II) complexes provide insights into the nature of the vibrational modes that are coupled to the photophysically important, lowest energy excited states of natural photosynthetic assemblies.

Der Einbau von Magnesium in Liganden der Chlorophyll-Reihe mit (2,6-Di-t-butyl-4-methylphenoxy)magnesiumjodid

Experimental details are given for the new method of introducing magnesium into porhpinoid ligands by (2,6-di-t-butyl-4-methylphenoxy)magnesium iodide (1), previously published in preliminary form .Besides magnesium octaethylporphyrinate (14), methyl pyrochlorophyllide a (10), methyl chlorophyllide a (8), and methyl bacteriochlorophyllide a (12), the complexation of pheophytin a (2) to chlorophyll a (3) and of pheophytin b (4) to chlorophyll b (5) are described.