Month: November 2022

Photobactericidal films from porphyrins grafted to alkylated cellulose – synthesis and bactericidal properties was written by Krouit, Mohammed;Granet, Robert;Krausz, Pierre. And the article was included in European Polymer Journal in 2009.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

Two series of porphyrinic cellulose laurate esters plastic films, where the photosensitizers are covalently linked to the cellulosic polymer have been synthesized by using a “one-pot, two-step” esterification reaction. The photosensitizers were first covalently bounded to the cellulosic polymer using either 4- or 11-carbon spacer arms. The porphyrinic plastic films were then obtained by a second esterification with lauric acid. The reaction was studied according to reaction time, temperature, lauric acid amount, pyridine playing the role proton trapping base. Para-toluenesulfonylchloride has been proved to be a powerful activating agent for this reaction. The drawback of the steric hindrance of the porphyrinic macrocycle towards cellulosic hydroxyl groups has been overcome by increasing the number of carbon of spacer arms from 4- to 11-carbons. The photobactericidal activity of these materials was evaluated against Gram pos. and Gram neg. strains bacteria. First results show that these new plastic films display photobactericidal activity for porphyrin grafting percentage higher than 0.16, whereas the non-porphyrinic control allowed full growth of bacteria. These materials could be an alternative in order to overcome the growing bacterial multiresistance to classical antibiotics. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.Recommanded Product: 57412-08-5

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Poly(arylene ether ketone)s with pendant porphyrins: synthesis and investigation on optical limiting properties was written by Du, Yinlong;Zhu, Kai;Fang, Yu;Zhang, Shuling;Zhang, Xingrui;Lu, Yaning;Yang, Yanchao;Song, Yinglin;Wang, Guibin. And the article was included in RSC Advances in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:

This paper describes the synthesis and characterization of a novel series of poly(arylene ether ketone)s bearing porphyrin pendants, along with the demonstration of their nonlinear optical and optical limiting properties at 532 nm in both THF and films. The incorporation of pendant porphyrins was done through a modified esterification using a copoly(arylene ether ketone) with free carboxyl groups and mono-hydroxyphenyl porphyrins with different substituents and center metal. The introduction of porphyrin in the polymer was confirmed by IR, ¹H NMR, UV-vis, fluorescence spectroscopies, and WAXD. Investigation of thermal properties indicated that the poly(arylene ether ketone)s with porphyrin pendants possessed higher T_gs, and slightly lower decomposition temperatures than the starting copolymers. The results of optical limiting and Z-scan measurements demonstrated that the porphyrinated poly(arylene ether ketone)s exhibited strong optical limiting responses and nonlinear absorption properties with the nonlinear absorption coefficient ¦Â in the order of 10^-9 (m W^-1) magnitude. The effects of pendant porphyrin structure on the thermal, mech., linear and nonlinear optical properties of the poly(arylene ether ketone)s were investigated in detail. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5COA of Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.COA of Formula: C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthesis and solution self-assembly behavior of porphyrin tethered by fullerene C₆₀ was written by Sitienei, Wilson Lelei;Wangatia, Lodrick Makokha;Zeng, Ting;Sun, Bin;Zhu, Meifang. And the article was included in Advanced Materials Research in 2013.HPLC of Formula: 57412-08-5 The following contents are mentioned in the article:

This paper focuses on the synthesis, spectroscopic studies and self-assembly behavior of porphyrin Ph linked fullerene C₆₀ dyad, which included COOH groups in its fullerene unit so as to promote its adsorption onto TiO₂. UV-vis spectrum and steady-state fluorescence spectrum measurement, showed that the self-assembly of this compound in different solvents with different polarities. The results showed that the soret absorption peak slightly blue shifted by 5 nm in acetonitrile and 2 nm in THF, while the soret peaks in toluene solution was the same as in chloroform. Increasing concentration from 1*10^-6 mol/L to 2*10^-5 mol/L in chloroform resulted into aggregation, also the slight red shifting on cooling from 90¡ãC to 10¡ãC was observed from a temperature dependent UV-vis absorption spectra, thus indicates aggregation. All these features may indicate presence of J-type aggregation happening in 4-methylphenyl-H₂porhyrin-fullerene C₆₀-COOH. In addition, the fluorescence of 4-methylphenyl-H₂porhyrin-fullerene C₆₀-COOH has been quenched compared to that of pure 4-methylphenyl-H₂porhyrin-OH under the same concentration Therefore, this novel material design may find good application in photoelec. devices. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5HPLC of Formula: 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. The atoms and molecules used as ligands are almost always those that are capable of functioning as the electron-pair donor in the electron-pair bond (a coordinate covalent bond) formed with the metal atom. The ligands are electron-rich and highly tunable to provide catalyst systems with a diverse scope, high stability, and reactivity.HPLC of Formula: 57412-08-5

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Phosphorus(V)corrole-Porphyrin Based Hetero Trimers: Synthesis, Spectroscopy and Photochemistry was written by Giribabu, Lingamallu;Kandhadi, Jaipal;Kanaparthi, Ravi Kumar. And the article was included in Journal of Fluorescence in 2014.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

‘Axial-bonding’-type hetero trimers were constructed by employing a simple ‘inorganic’ reaction such as axial bond formation of main group element containing phosphorus corrole. The approach is simple and modular in nature. The architecture of these hetero trimers such that, while a phosphorus(V)corrole forms the basal scaffolding unit, either two free-base porphyrins [(H₂)₂-PCor] or Zn^II porphyrins [(Zn)₂-PCor] occupy the two axial sites via an aryloxy bridge. Both hetero trimeric species were completely characterized by mass (FAB), UV/visible, ¹H NMR spectroscopies and also by the differential pulse voltammetric method. Comparison of their spectroscopic and electrochem. data of these trimers with those of the corresponding reference compounds reveal that there is no apparent ring-to-ring interactions in these ‘vertically’ linked hetero trimers. Reduced fluorescence quantum yields were observed for [(H₂)₂-PCor] and [(Zn)₂-PCor] when compared to corresponding monomeric chromophores. Finally, a comparison is made between the presently reported phosphorus(V)corrole based hetero arrays and the previously reported analogous arrays based on Ge(IV)corrole with regard to their spectroscopic properties and photochem. activities. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Catalytic transformations have become a mainstay in the toolkit of the synthetic and increasing non-synthetic chemist alike. The actual catalysts are metal complexes that are prepared from ligands and appropriate metal precursors.Recommanded Product: 57412-08-5

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Photoinduced Processes in Self-Assemblies of Bis-Porphyrinic Tweezers with an Axially Coordinated Bispyridinofullerene was written by Bris, Anamarija;Troselj, Pavle;Margetic, Davor;Flamigni, Lucia;Ventura, Barbara. And the article was included in ChemPlusChem in 2016.Computed Properties of C47H36N4O The following contents are mentioned in the article:

Self-assembled bis(zinc porphyrin)-bispyridinopyrrolidinofullerene coordination complexes were obtained in solution Two [5]polynorbornane-bridged bis-porphyrins were used that differed in the arms containing porphyrin units: whereas 1 has rigid [5]polynorbornane linkers, compound 2 has addnl. flexible Pr chains. The different geometries of the two hosts affect both the complexation process and the photoreactivity of the final product. Formation of the complexes, characterized by absorption, emission, and NMR spectroscopy, occurs with association constants in the order of 10⁴ and 10⁶?M^-1 for bis-porphyrin tweezers 1 and 2, resp. The higher flexibility of tweezers 2 accounts for the greater association ability. Full photophys. characterization of the complexes, as well as of suitable models, has been performed by means of steady-state and time-resolved optical spectroscopy. Ultrafast luminescence detection and pump-probe transient absorption anal. were used to investigate photoinduced processes within the complexes. The results provide evidence that an electron-transfer process from the bis-porphyrin host to the fullerene guest occurs in both complexes, and a slightly longer lifetime of the charge-separated state is observed in the complex with more flexible host 2. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Computed Properties of C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligands are classified based on the number of lone pair electrons available for the central metal atom, size and charge like anionic, cationic, neutral, monodentate, bidentate, polydentate ligands. It is clear that future advancements in metal complexes and their applications crucially depend on ligand design, whereas the ligand electronic, steric and topological properties provide numerous improvements to the reactivity and selectivity at the metal centers.Computed Properties of C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthesis and Photophysical Properties of a Conformationally Flexible Mixed Porphyrin Star-Pentamer was written by Bell, Toby D. M.;Bhosale, Sheshanath V.;Ghiggino, Kenneth P.;Langford, Steven J.;Woodward, Clint P.. And the article was included in Australian Journal of Chemistry in 2009.Formula: C47H36N4O The following contents are mentioned in the article:

The synthesis of a porphyrin star-pentamer bearing a free-base porphyrin core and four Zn(II) metalloporphyrins, which are tethered by a conformationally flexible linker about the central porphyrin’s antipody, is described. The synthetic strategy is highlighted using olefin cross metathesis to link the five chromophores together in a directed fashion in high yield. Photoexcitation into the Soret absorption band of the Zn porphyrin chromophores at 425 nm leads to a substantial enhancement of central free-base porphyrin fluorescence, indicating energy transfer from the photoexcited Zn porphyrin (outer periphery) to central free-base porphyrin. Time-resolved fluorescence decay profiles required three exponential decay components for satisfactory fitting. These are attributed to emission from the central free-base porphyrin and to two different rates of energy transfer from the Zn porphyrins to the free-base porphyrin. The faster of these decay components equates to an energy-transfer rate constant of 3.7 ¡Á 10⁹ s^-1 and an efficiency of 83%, whereas the other is essentially unquenched with respect to reported values for Zn porphyrin fluorescence decay times. The relative contribution of these two components to the initial fluorescence decay is ?3:2, similar to the 5:4 ratio of cis and trans geometric isomers present in the pentamer. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Attachment of the ligand to the metal may be through a single atom, in which case it is called a monodentate ligand, or through two or more atoms, in which case it is called a didentate or polydentate ligand. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Formula: C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Phosphorus-nitrogen compounds. Part 17: The synthesis, spectral and electrochemical investigations of porphyrino-phosphazenes was written by Egemen, Gamze;Hayvali, Mustafa;Kilic, Zeynel;Solak, A. Osman;Ustundag, Zafer. And the article was included in Journal of Porphyrins and Phthalocyanines in 2010.Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

The reactions of unsym. porphyrins 5,10,15-tris(4-tolyl)-20-(3-R-4-R’-phenyl)porphyrins (R’ = OH; R = H, 1; R = Me, 2) with Ni(OAc)₂¡¤4H₂O in boiling DMF produce porphyrin complexes (3 and 4). From the reactions of free porphyrin ligands 1 and 2 with hexachlorocyclotriphosphazatriene, N₃P₃Cl₆, the new free porphyrino-phosphazene derivatives (R’ = O-P₃N₃Cl₅, 5 and 6) were obtained. However, the reactions of N₃P₃Cl₆ with porphyrin complexes (3 and 4) afford the new nickel porphyrino-phosphazene complexes (R’ = O-P₃N₃Cl₅, 7 and 8). In the literature there are a few examples of the porphyrino-phosphazene architectures. The structural studies of all the compounds were made by elemental analyses, MS, FTIR, ¹H NMR, ³¹P NMR and UV-visible techniques. The cyclic voltammograms (CVs) were examined in acetonitrile (MeCN) containing 0.1M tetrabutylammonium-tetrafluoroborate (TBATFB) to study the surface attachment properties at the glassy carbon electrode (GCE) and the influence of the presence of metal cations in the porphyrin ring. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligands are classified based on the number of lone pair electrons available for the central metal atom, size and charge like anionic, cationic, neutral, monodentate, bidentate, polydentate ligands. The ability of ligands to engender a variety of useful properties of organometallic complexes is the major enabling force for the discovery of new catalytic reactions, activation of small molecules, dramatically enhanced reactivity.Quality Control of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A calix[4]arene-modified (Pc)Eu(Pc)Eu[T(C4A)PP]-based sensor for highly sensitive and specific host-guest electrochemical recognition was written by Dong, Jurong;Yu, Zhenning;Kong, Xia;Zhao, Shuai;Li, Xiyou;Chen, Yuting;Chen, Yanli;Jiang, Jianzhuang. And the article was included in Dalton Transactions in 2019.Application of 57412-08-5 The following contents are mentioned in the article:

A calix[4]arene (C4A)-functionalized (phthalocyaninato)(porphyrinato) europium(III) triple-decker compound (Pc)Eu(Pc)Eu[T(C4A)PP] (1) is firstly designed, synthesized and prepared into well-organized films using a simple solution-processing quasi-Langmuir-Shaefer (QLS) method. The QLS film of 1 on an ITO (film 1/ITO) electrode, serving as a host-guest electrochem. recognition layer, is able to establish specific responses/interactions toward organic mols. with biol. and drug interest including dopamine (DA), uric acid (UA), tyrosine (Tyr), tryptophan (Trp) and Acetaminophen (APAP), depending mainly on the matching degree of mol. dimensions between the analytes and the C4A cavity in addition to their chem. nature. More significantly, the film 1/ITO electrode shows a wide linear range of electrochem. detection (from 0.1 to 100¦ÌM) to DA and APAP, with a high sensitivity of 53.0 and 94.3¦ÌA mM^-1 and a low detection limit of 25 and 11 nM for DA and APAP, resp., representing the best result among the nonenzymic organic semiconductor-based biosensors. In particular, the film 1/ITO electrode exhibits excellent stability, reproducibility, high selectivity, and anti-interference nature for the detection of both DA and APAP, indicating the great potential of calix[n]arene macrocycle-modified tetrapyrrole rare earth sandwich compounds in the field of ultrasensitive and specific nonenzymic sensors. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Application of 57412-08-5).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. A ligand is an ion or molecule, which donates a pair of electrons to the central metal atom or ion to form a coordination complex. Replacing precious metals with cheaper and more environmentally friendly metals is regarded as a highly desirable goal in the field of catalysis.Application of 57412-08-5

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Cyclohexene epoxidation by the mono-oxygenase model (tetraphenylporphyrinato)manganese(III) acetate-sodium hypochlorite was written by Razenberg, J. A. S. J.;Van der Made, A. W.;Smeets, J. W. H.;Nolte, R. J. M.. And the article was included in Journal of Molecular Catalysis in 1985.Synthetic Route of C47H36N4O The following contents are mentioned in the article:

Oxidation of cyclohexene by (tetraphenylporphyrinato)manganese(III) acetate (I) and sodium hypochlorite as oxidant was studied in a two-phase H₂O-CH₂Cl₂ system in the presence of a phase transfer reagent. A kinetic study with this system reveals the following features: the main product of the reaction (yield ¡Ý 80%) is 1,2-epoxycyclohexane; in the presence of excess oxidant the reaction is zero order in cyclohexene; the reaction order in Mn(III) concentration decreases from 1 to ? 0 with increasing concentration of this catalyst; the reaction order in hypochlorite decreases from 1 to 0 with increasing concentration of the reagent; pyridine and substituted pyridines enhance the reaction rate. A Hammett treatment of the rate data for various substituted pyridines gives a ¦Ñ-value of -1.00. Anchoring of I onto poly(vinylpyridine) or a polymer of an isocyanide increases the reaction rate by a factor of 1.5-6.0. Based on these findings and on evidence from the literature, a mechanism for the epoxidation of cyclohexene is proposed. The key intermediate is an oxo-manganese(V) complex, which is formed from Mn(III) and hypochlorite in a pyridine-catalyzed step. The Mn(V) species may react in 2 ways: either with substrate to give epoxide or with Mn(III) to form a ¦Ì-oxomanganese(IV) dimer. The latter route is suppressed when the catalyst is anchored to the polymeric support. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Synthetic Route of C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand, in chemistry, any atom or molecule attached to a central atom, usually a metallic element, in a coordination or complex compound. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.Synthetic Route of C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Triplet-Triplet Excitation Transfer in Palladium Porphyrin-Fullerene and Platinum Porphyrin-Fullerene Dyads was written by Obondi, Christopher O.;Lim, Gary N.;D’Souza, Francis. And the article was included in Journal of Physical Chemistry C in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:

Covalently linked donor-acceptor dyads involving Pd(II) and Pt(II) porphyrins as triplet sensitizers and fullerene as an acceptor were newly synthesized. These dyads were characterized by optical absorbance, emission, and electrochem. methods. In contrast to the earlier reported Zn(II) porphyrin and free-base porphyrin-based dyads of similar structures, photoinduced electron transfer from the short-lived singlet and long-lived triplet excited metalloporphyrin to the fullerene was not observed, although these processes are energetically possible according to the energy level diagrams. That is, diagnostic transient bands corresponding to MP^?+ [M = Pd(II) or Pt(II)] in the 600-650-nm range and C₆₀^?- in the 1000-nm range were absent in the femtosecond and nanosecond transient absorption spectra. Excited energy transfer from the triplet excited metalloporphyrin to the fullerene was witnessed in both Pd and Pt porphyrin-derived dyads by nanosecond transient absorption studies. Three solvents with different polarities were employed to visualize the medium effects. The determined rate of energy transfer, k_EnT, is higher for the PdP-based dyad than the PtP-based dyad in a given solvent and that the rates were higher for polar solvents than for nonpolar solvent. The present study demonstrates how the heavy-metal ion in the porphyrin cavity modulates photoinduced processes and the solvent-dependent kinetics of these events. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5COA of Formula: C47H36N4O).

4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5) belongs to catalyst ligands. Ligand design occupies a central place in organic synthesis and catalysis. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.COA of Formula: C47H36N4O

Referemce:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI