Category: 28903-71-1

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Journal of Colloid and Interface Science called One-step pyrolysis synthesis of nitrogen, manganese-codoped porous carbon encapsulated cobalt-iron nanoparticles with superior catalytic activity for oxygen reduction reaction, Author is Sun, Rui-Min; Yao, You-Qiang; Wang, Ai-Jun; Fang, Ke-Ming; Zhang, Lu; Feng, Jiu-Ju, which mentions a compound: 28903-71-1, SMILESS is COC1=CC=C(C=C1)C(C2=[N]3[Co+2]4([N-]56)[N-]7C(C(C8=CC=C(C=C8)OC)=C3C=C2)=CC=C7C(C9=CC=C(C=C9)OC)=C%10C=CC%11=[N]4%10)=C5C=CC6=C%11C%12=CC=C(C=C%12)OC, Molecular C48H38CoN4O4, Formula: C48H38CoN4O4.

Replacing precious metal catalysts with low-price and abundant catalysts is one of urgent goals for green and sustainable energy development. It is imperative yet challenging to search low-cost, high-efficiency, and long-durability electrocatalysts for oxygen reduction reaction (ORR) in energy conversion devices. Herein, three-dimensional low-cost Co3Fe7 nanoparticles/nitrogen, manganese-codoped porous carbon (Co3Fe7/N, Mn-PC) was synthesized with the mixture of dicyandiamide, cobalt (II) tetramethoxyphenylporphyrin (Co(II)TMOPP), hemin, and manganese acetate by one-step pyrolysis and then acid etching. The resultant Co3Fe7/N, Mn-PC exhibited excellent durability and prominent ORR activity with more pos. onset potential (Eonset, 0.98 V) and half-wave potential (E1/2, 0.87 V) in 0.1 M KOH electrolyte, coupled with strong methanol resistance. The pyrolysis temperature and optimal balance of graphite with pyridine-nitrogen are of significance for the ORR performance. The prepared Co3Fe7/N, Mn-PC displayed excellent ORR performance over com. Pt/C in the identical environment. It was ascribed to the uniform 3D architecture, Mn- and N-doping effects by finely adjusting the electronic structures, coupled with the synergistic catalytic effects of multi-compositions and multi-active sites. This work provides some constructive guidelines for preparation of low-cost and high-efficiency ORR electrocatalysts.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Chambers, Dana R.; Juneau, Antoine; Ludwig, Cory T.; Frenette, Mathieu; Martin, David B. C. researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Electric Literature of C48H38CoN4O4.They published the article 《C-O Bond Cleavage of Alcohols via Visible Light Activation of Cobalt Alkoxycarbonyls》 about this compound( cas:28903-71-1 ) in Organometallics. Keywords: alc carbonylation homolysis reaction porphyrin cobalt; crystal structure porphyrin cobalt alkoxycarbonyl; mol structure porphyrin cobalt alkoxycarbonyl. We’ll tell you more about this compound (cas:28903-71-1).

A strategy for the activation of C-O bonds in alcs. via a carbonylation-homolysis-decarboxylation process is described. Using readily available Co(II) porphyrin precursors, carbonylation of simple alcs. provides access to alkoxycarbonyl Co(III) complexes. Spectroscopic, crystallog., and computational methods were used to provide structural details and an estimate for the Co-C bond dissociation energy of an alkoxycarbonylcobalt(III) complex of 39.8 kcal/mol for the 1st time. Visible light irradiation in the presence of the radical trapping agent TEMPO and a thiol reducing agent demonstrates the cleavage of the alc. C-O bond under oxidative and reductive conditions, resp. Addition of a stoichiometric reducing agent allows the use of a catalytic amount of hindered thiol for the reduction of a benzylic alc. to the corresponding hydrocarbon.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Molecular Structure called Spectroscopic, Electrochemical, Magnetic and Structural Characterization of an Hexamethylenetetramine Co(II) Porphyrin Complex – Application in the Catalytic Degradation of Vat Yellow 1 dye, Author is Nasri, Soumaya; Hajji, Melek; Guergueb, Mouhieddinne; Dhifaoui, Selma; Marvaud, Valerie; Loiseau, Frederique; Molton, Florian; Roisnel, Thierry; Guerfel, Taha; Nasri, Habib, which mentions a compound: 28903-71-1, SMILESS is COC1=CC=C(C=C1)C(C2=[N]3[Co+2]4([N-]56)[N-]7C(C(C8=CC=C(C=C8)OC)=C3C=C2)=CC=C7C(C9=CC=C(C=C9)OC)=C%10C=CC%11=[N]4%10)=C5C=CC6=C%11C%12=CC=C(C=C%12)OC, Molecular C48H38CoN4O4, Safety of 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II).

In this study, a new cobaltous-(hexamethylenetetramine) [meso-tetra(para-methoxyphenyl)porphyrin complex] with the formula [CoII(TMPP)(HMTA)] (1) was synthesized. The mol. structure was confirmed in solution by 1H NMR spectroscopy and mass spectrometry methods, and the single crystal x-ray diffraction structure of 1 was determined at both room temperature and low temperature This species was further characterized by IR, UV-visible and fluorescence spectroscopies, magnetic susceptibility measurements and cyclic voltammetry. The chem. reactivity behavior was also assessed theor. through D. Functional Theory (DFT) approach. Magnetic investigation indicates that the Co(II)-HMTA porphyrin 1 species at low temperature is a cobaltous low-spin (S = 1/2) species while at high temperature complex 1 exhibits a spin-crossover low-spin (S = 1/2) ↔ high-spin (S = 3/2). The adsorption kinetic of the “”vat yellow 1 dye”” was carried out in aqueous solution at pH = 6. The exptl. results are better fitted using the pseudo second order model. Furthermore, complex 1 was tested as catalyst in the degradation of the vat yellow 1 dye using an aqueous H2O2 solution and by photodegradation under solar light.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Category: iodides-buliding-blocks. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Mechanochemical insertion of cobalt into porphyrinoids using Co2(CO)8 as a cobalt source. Author is Damunupola, Dinusha; Chaudhri, Nivedita; Atoyebi, Adewole O.; Bruckner, Christian.

Cobalt porphyrinoids find broad use as catalysts or electrode materials. Traditional solution state cobalt insertion reactions into a free base porphyrinoid to generate the corresponding cobalt complex generally require fairly harsh conditions, involving the heating of the reactants in high-boiling solvents for extended period of times. Authors report here an alternative method of cobalt insertion: A solvent-free (at least for the insertion step) mechanochem. method using a planetary ball mill with Co2(CO)8 as a cobalt source. The scope and limits of the reaction were investigated with respect to the porphyrinic substrate susceptible to the reaction conditions, the influences of different grinding aids, and bases added. While the mechanochem. method is, like other metal insertion methods into porphyrinoids, not universally suitable for all substrates tested, it is faster, milder, and greener for several others, when compared to established solution-based methods.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Makhlouf, M. M.; Shehata, M. M. published the article 《Exploring illumination effect on the impedance spectroscopy and dielectric dispersion of 5, 10, 15, 20-tetrakis(4-methoxyphenyl)-21H, 23H-porphine cobalt(II)/silicon heterojunction photovoltaic》. Keywords: cobalt porphine complex silicon heterojunction photovoltaic dielec dispersion impedance.They researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Name: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II). Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:28903-71-1) here.

Abstract: The dynamic properties of a hybrid heterojunction based on a small mol. of 5, 10, 15, 20-tetrakis (4-methoxyphenyl)-21H, 23H-porphine cobalt(II), CoTMPP, grown onto p-Si wafer have been studied using impedance spectroscopy (IS) at various frequency range (102-106 Hz) under different illumination intensities (0-24 mW/cm2) at room temperature The fabricated Al/p-Si/CoTMPP/Au heterojunction performs two relaxation processes associated with Al/p-Si and p-Si/CoTMPP interfaces are attributed to a Maxwell-Wagner-Sillars (MWS) effect causes charge accumulation at interfacial regions. With increasing illumination intensity, the MWS effect enhances and leads to more accumulated charges at the interfacial regions. Based on Nyquist plots fitting, the equivalent circuit of the fabricated device was modeled. The dielec. dispersion, elec. modulus, relaxation process and elec. conductivity were investigated under different illuminations. The present results revealed an excellent photoresponse and photo-resistive of the Al/p-Si/CoTMPP/Au device as a candidate for photovoltaic devices and optoelectronics applications.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Glazkova, M. E.; Ageeva, T. A.; Rodina, Yu. S.; Koifman, O. I. published the article 《Spectral investigations of cobalt porphyrinates interaction with radical polymerization initiators》. Keywords: electronic absorption cobalt porphyrin peroxide catalyst radical polymerization methacrylate.They researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Name: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II). Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:28903-71-1) here.

The article presents the results of the kinetics study of the cobalt porphyrins interaction with radical polymerization initiators – benzoyl peroxide and lauryl peroxide in solution by the spectrophotometric method. From disparate literature data, it is known that some metalloporphyrins can interact with benzoyl peroxide to form the tautomers of porphyrins – isoporphyrins. These compounds have a number of specific properties, for example, it can be catalysts of various processes. Perhaps the isoporphyrins formation is the reason for high activity of the initiating systems “”cobalt porphyrin – benzoyl peroxide”” in the polymerization of vinyl monomers. Cobalt(II)complexes of tetraphenylporphyrin, tetra-p-methoxyphenylporphyrin, 5,15-bis(4′-tert-butylphenyl)-3,7,13,17-tetramethyl-2,8,12,18-tetra-p-butylporphyrin were selected as the objects of this study. The influence of the porphyrin ligand structure on the formation of cobalt isoporphyrins was estimated The interaction of cobalt (II) tetraphenylporphyrin and cobalt (II) tetra-para-methoxyphenylporphyrin with peroxides showed changes in the electronic absorption spectra of metalloporphyrins: deformation of the Soret band, reduction of the absorption band in the visible region, and the appearance of absorption bands in the near IR region. These changes are characteristic for metalloisoporphyrins. Data on the interaction of cobalt porphyrins with lauryl peroxide were obtained for the first time. The formation of isoporphyrins is possible with the different ratio of concentrations of reagents: with a lack of peroxide, with equimolar ratio, and also with a significant (100-fold) excess of peroxide. When 5,15-bis(4′-tert-butylphenyl)-3,7,13,17-tetramethyl-2,8,12,18-tetra-p-butylporphyrinate cobalt (II) reacted with peroxides, no isoporphyrinates were observed The article presents the effective reaction rate constants of the cobalt isoporphyrinates formation at 25°C.It is shown that the structure of both cobalt porphyrinates and organic peroxides affects the possibility and rate of isoporphyrins formation.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 28903-71-1, is researched, SMILESS is COC1=CC=C(C=C1)C(C2=[N]3[Co+2]4([N-]56)[N-]7C(C(C8=CC=C(C=C8)OC)=C3C=C2)=CC=C7C(C9=CC=C(C=C9)OC)=C%10C=CC%11=[N]4%10)=C5C=CC6=C%11C%12=CC=C(C=C%12)OC, Molecular C48H38CoN4O4Journal, Waste and Biomass Valorization called Metalloporphyrin as a Biomimetic Catalyst for the Catalytic Oxidative Degradation of Lignin to Produce Aromatic Monomers, Author is Xie, Jinfeng; Ma, Guanfeng; Ouyang, Xinping; Zhao, Lisha; Qiu, Xueqing, the main research direction is metalloporphyrin biomimetic catalyst lignin catalytic oxidative degradation aromatic monomer.Electric Literature of C48H38CoN4O4.

Lignin, an abundant biomass waste, was degraded under microwave irradiation with H2O2 as the oxidant and metalloporphyrin as the catalyst. The effect of substituent group (4-methylphenyl, 4-methoxyphenyl, 4-bromophenyl and 4-carboxyphenyl) at the meso-benzene ring of metalloporphyrin, central metal ion (Co, Mn, Ni and Fe) and axial ligand (chlorine, p-hydroxypyridine, p-pyridinecarboxaldehyde) on the degradation of lignin was investigated. The electron-withdrawing group not only reduces the electron cloud d. on the porphyrin ring, but also promotes the formation of higher active intermediate [(Porp)MeIV=O]+·. Therefore, the presence of stronger electron-withdrawing substituents makes the metalloporphyrins more efficient in lignin degradation Compared to Co porphyrin, there are less amount of [(Porp)MeIV=O]+· formed when Mn, Fe or Ni porphyrin was used as the catalyst for degrading lignin. Consequently, Co porphyrin contributed to a higher YAM (the yield of aromatic monomers). The strong nucleophilicity and the low steric hindrance of axial ligand was advantageous for the stability of metalloporphyrins, which is favorable for improving the catalytic activity to the degradation of lignin. It is found that the YAM increases 20.1% from 5.6% by using CoTBrPPCl as the reaction catalyst under the optimized conditions.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Cuxart, Marc G.; Valbuena, Miguel Angel; Robles, Roberto; Moreno, Cesar; Bonell, Frederic; Sauthier, Guillaume; Imaz, Inhar; Xu, Heng; Nistor, Corneliu; Barla, Alessandro; Gargiani, Pierluigi; Valvidares, Manuel; Maspoch, Daniel; Gambardella, Pietro; Valenzuela, Sergio O.; Mugarza, Aitor published the article 《Molecular approach for engineering interfacial interactions in magnetic/topological insulator heterostructures》. Keywords: interfacial interaction magnetic topol insulator; X-ray magnetic circular dichroism; angle-resolved photoelectron spectroscopy; density functional theory; interfacial interactions; metal−organic molecules; scanning tunneling microscopy; topological insulators.They researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Product Details of 28903-71-1. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:28903-71-1) here.

Controlling interfacial interactions in magnetic/topol. insulator heterostructures is a major challenge for the emergence of novel spin-dependent electronic phenomena. As for any rational design of heterostructures that rely on proximity effects, one should ideally retain the overall properties of each component while tuning interactions at the interface. However, in most inorganic interfaces, interactions are too strong, consequently perturbing, and even quenching, both the magnetic moment and the topol. surface states at each side of the interface. Here, we show that these properties can be preserved using ligand chem. to tune the interaction of magnetic ions with the surface states. By depositing Co-based porphyrin and phthalocyanine monolayers on the surface of Bi2Te3 thin films, robust interfaces are formed that preserve undoped topol. surface states as well as the pristine magnetic moment of the divalent Co ions. The selected ligands allow us to tune the interfacial hybridization within this weak interaction regime. These results, which are in stark contrast with the observed suppression of the surface state at the first quintuple layer of Bi2Se3 induced by the interaction with Co phthalocyanines, demonstrate the capability of planar metal-organic mols. to span interactions from the strong to the weak limit.

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Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Singh, Devesh Kumar; Ganesan, Vellaichamy; Yadav, Dharmendra Kumar; Yadav, Mamta; Sonkar, Piyush Kumar; Gupta, Rupali published the article 《Mesoporous carbon nitride supported 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphine cobalt(II) as a selective and durable electrocatalyst for the production of hydrogen peroxide via two-electron oxygen reduction》. Keywords: carbon nitride supported cobalt tetramethoxyphenylporphyrin electrocatalyst hydrogen peroxide production; two electron oxygen reduction hydrogen peroxide production electrocatalyst.They researched the compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II)( cas:28903-71-1 ).Related Products of 28903-71-1. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:28903-71-1) here.

Mesoporous carbon nitride (MCN) is synthesized using a mesoporous silica material (MCM-41) as a sacrificial template. 5,10,15,20-Tetrakis(4-methoxyphenyl)-21H,23H-porphine cobalt(II) (cobalt tetramethoxyphenylporphyrin, CoTMPP), which consists of methoxy groups as the electron-rich center is integrated with MCN and the resulting composite material (CoTMPP@MCN) without any further heat treatment is used for the electrocatalytic reduction of oxygen. CoTMPP@MCN shows a higher onset potential (0.65 and 0.84 V, resp., in 0.1 M HClO4 and 0.1 M KOH) for the oxygen reduction reaction (ORR) than the bare MCN (0.34 and 0.60 V, resp., in 0.1 M HClO4 and 0.1 M KOH). The ORR onset potential exhibited by CoTMPP@MCN is comparable to several non-pyrolyzed mono-nuclear metal porphyrin integrated on carbon-based supports in both acidic and basic media. Kinetic measurements of CoTMPP@MCN show high selectivity for two-electron oxygen reduction to H2O2 in both media. The H2O2 yield in terms of faradaic efficiency is measured to be 87.6 and 89.0%, resp., in 0.1 M HClO4 and 0.1 M KOH. CoTMPP@MCN exhibits amazingly high durability (minute changes in the onset potential and c.d. at high reduction potentials after 3000 CV cycles) facilitated by the surface coordination of CoTMPP through the nitrogen present on the MCN surface. Being highly selective and outstandingly durable, CoTMPP@MCN fulfills all necessary requirements for an economically efficient electrocatalyst for industrial hydrogen peroxide synthesis and related com. applications.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Application of 28903-71-1. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5,10,15,20-Tetrakis (4-methoxyphenyl)-21H,23H-porphine cobalt (II), is researched, Molecular C48H38CoN4O4, CAS is 28903-71-1, about Can a Nitrosyl of a Mn(II)-Porphyrin Complex Release Nitroxyl/HNO?. Author is Mazumdar, Rakesh; Saha, Shankhadeep; Samanta, Bapan; Mondal, Biplab.

In general, the nitrosyl complexes of Mn(II)-porphyrinate having the {Mn(NO)}6 configuration are not considered as HNO or nitroxyl (NO-) donors because of [MnI-NO+] nature. A nitrosyl complex of Mn(II)-porphyrin, [Mn(TMPP2-)(NO)], [1, TMPPH2 = 5,10,15,20-tetrakis-4-methoxyphenylporphyrin], is shown to release HNO in the presence of HBF4. It is evidenced from the characteristic reaction of HNO with PPh3 and isolation of the [(TMPP2-)MnIII(H2O)2](BF4) (2). This is attributed to the fact that H+ from HBF4 polarizes the NO group whereas BF4- interacts with metal ion to stabilize the Mn(III) form. These two effects cooperatively result in the release of HNO from 1. Complex 1 behaves as a nitroxyl (NO-) donor in the presence of [Fe(dtc)3] (dtc = diethyldithiocarbamate anion) and [Fe(TPP)(Cl)] (TPP = 5,10,15,20-tetraphenylporphyrinate) to result in [Fe(dtc)2(NO)] and [Fe(TPP)(NO)], resp.

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Reference:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com