Category: catalyst-ligand

Self-assembled nanomaterials based on complementary Sn(IV) and Zn(II)-porphyrins, and their photocatalytic degradation for rhodamine B dye was written by Shee, Nirmal K.;Kim, Hee-Joon. And the article was included in Molecules in 2021.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

A series of porphyrin triads (1-6), based on the reaction of trans-dihydroxo-[5,15-bis(3-pyridyl)-10,20-bis(phenyl)porphyrinato]tin(IV) (SnP) with six different phenoxy Zn(II)-porphyrins (ZnLn), was synthesized. The cooperative metal-ligand coordination of 3-pyridyl nitrogens in the SnP with the phenoxy Zn(II)-porphyrins, followed by the self-assembly process, leads to the formation of nanostructures. The red-shifts and remarkable broadening of the absorption bands in the UV-vis spectra for the triads in CHCl3 indicate that nanoaggregates may be produced in the self-assembly process of these triads. The emission intensities of the triads were also significantly reduced due to the aggregation. Microscopic analyses of the nanostructures of the triads reveal differences due to the different substituents on the axial Zn(II)-porphyrin moieties. All these nanomaterials exhibited efficient photocatalytic performances in the degradation of rhodamine B (RhB) dye under visible light irradiation, and the degradation efficiencies of RhB in aqueous solution were observed to be 72~95% within 4 h. In addition, the efficiency of the catalyst was not impaired, showing excellent recyclability even after being applied for the degradation of RhB in up to five cycles. 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

Synthesis, Structure and Photophysical Properties of Ferrocenyl or Mixed Sandwich Cobaltocenyl Ester Linked meso-Tetratolylporphyrin Dyads was written by Gokulnath, Sabapathi;Achary, Balahoju Shivaprasad;Kumar, Chakka Kiran;Trivedi, Rajiv;Sridhar, Balasubramanian;Giribabu, Lingamallu. And the article was included in Photochemistry and Photobiology in 2015.COA of Formula: C47H36N4O The following contents are mentioned in the article:

The authors report here the design and synthesis of porphyrin-metallocene dyads consisting of a metallocene [either ferrocene or mixed sandwich ¦Ç⁵-[C₅H₄(COOH)]Co(¦Ç⁴-C₄Ph₄)] connected via an ester linkage at meso Ph position of either free-base or Zn porphyrin. All these dyad systems were characterized by various spectroscopic and electrochem. methods. A dimeric form of these mols. was observed in the x-ray crystal structure of the zinc-porphyrin-cobaltocenyl dyad. The absorption spectra of all four dyads indicated the absence of electronic interactions between the porphyrin macrocycle and the metallocene in the ground state. However in all four dyads, fluorescence emission of the porphyrin was quenched (19-55%) as compared to their monomeric units. The quenching was more pronounced in ferrocene derivatives rather than cobaltocenyl derivatives The emission quenching can be attributed to the excited-state intramol. photoinduced electron transfer from metallocene to singlet excited state of porphyrin and the electron-transfer rates (k_ET) were established in the range 1.51 ¡Á 10⁸ to 1.11 ¡Á 10⁹ s^-1. They are solvent dependent. 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. 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. 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

Metal complexes with tetrapyrrole ligands. Part 73. Oxidation and reduction of cerium(IV) sandwich complexes with porphyrin ligands linked by aliphatic diether bridges of variable chain length was written by Buchler, Johann W.;Dippell, Torsten. And the article was included in European Journal of Inorganic Chemistry in 1998.Formula: C47H36N4O The following contents are mentioned in the article:

Starting from 5-(4-hydroxyphenyl)-10,15,20-tris(4-methylphenyl)porphyrin (HL) the new bis(porphyrinyloxy)alkanes L₂(CH₂)_n (n = 8, 11) I and II, resp., were synthesized by ether formation with the ¦Á,¦Ø-dibromoalkanes Br(CH₂)_nBr. Compound I was obtained by a 2-step reaction with the 5-[4-(8-bromooctyloxy)phenyl]-10,15,20-tris(4-methylphenyl)porphyrin as an intermediate. The diporphyrins I and II were metalated with Ce(III) acetylacetonate to yield the new (porphyrin)-Ce sandwich complexes III (n = 8 and 11) which were characterized by UV/Vis, IR, ¹H-NMR, ¹³C-NMR spectroscopy and cyclic voltammetry. The mono- and dications and the Ce(III) bisporphyrinate anions of III (n = 8-11) were produced by electrochem. oxidation and reduction, resp., and were examined by UV/Vis/NIR spectroscopy. The length of the lateral chains does not have a specific effect on the 1st and 2nd oxidation potentials of the porphyrin rings and the reduction potentials of the Ce ions in the bisporphyrinate systems, and on the energy of the NIR bands of the monocations. 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. 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.Formula: C47H36N4O

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

Manganeseporphyrins immobilized on silica microspheres as biomimetic catalysts hydroxylating cyclohexane with molecular oxygen was written by Cai, Jin-Hua;Huang, Jin-Wang;Yu, Han-Cheng;Ji, Liang-Nian. And the article was included in Journal of Sol-Gel Science and Technology in 2011.Electric Literature of C47H36N4O The following contents are mentioned in the article:

Three types of silica microspheres immobilizing Mn(III) porphyrins appending p-CH₃, p-H and p-Cl Ph substituents (designated as MnMP-S-SiO₂, MnPP-S-SiO₂ and MnCP-S-SiO₂, resp.) have been synthesized and characterized using SEM, IR, UV-vis and TG. The SEM images show that the morphol. of the silica microspheres is spheriform with ca. 2-4 ¦Ìm diameter The catalytic performances of various supported biomimetic catalysts for the hydroxylation of cyclohexane in the presence of mol. oxygen under mild conditions have been investigated and compared detailedly. The exptl. results confirmed that the catalytic efficiencies of these silica microspheres are much higher than those of the free Mn(III) porphyrin analogs and follow the order of MnMP-S-SiO₂ > MnPP-S-SiO₂ > MnCP-S-SiO₂. All these results indicate that the grafting particles can not only protect metalloporphyrin from oxidation, but also promote it to activate O₂. They are mild, reusable and highly efficient heterogeneous catalyst for the epoxidation of cyclohexene. The effect of substituent groups was also discussed. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Electric Literature of 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.Electric Literature of C47H36N4O

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

Addition of Porphyrins to Cigarette Filters To Reduce the Levels of Benzo[a]pyrene (B[a]P) and Tobacco-Specific N-Nitrosamines (TSNAs) in Mainstream Cigarette Smoke was written by Wang, Changguo;Dai, Ya;Feng, Guanglin;He, Rong;Yang, Wenmin;Li, Dongliang;Zhou, Xuezheng;Zhu, Lijun;Tan, Lanlan. And the article was included in Journal of Agricultural and Food Chemistry in 2011.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

Tobacco-specific N-nitrosamines (TSNAs) and benzo[a]pyrene (B[a]P) in mainstream cigarette smoke (MSS) cause smoking-related diseases and environmental pollution. Porphyrins were added to cigarette filters to reduce B[a]P (porphyrins A-E) and TSNAs (porphyrin F) in MSS. The porphyrin-B[a]P and porphyrin F-TSNAs (N’-nitrosoanabasine (NAB), N’-nitrosoanatabine (NAT), 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), and N-nitrosonornicotine (NNN)) interactions were investigated by fluorescence quenching and UV-visible spectroscopy. The correlation coefficients were 0.987-0.997 (B[a]P) and 0.994-0.999 (TSNAs), and the binding constants were (1.67-5.02) ¡Á 10⁵ (B[a]P) and 3.42 ¡Á 10³-1.40 ¡Á 10⁴ (TSNAs). Up to 36.72% of B[a]P and 46.67% of the TSNAs were eliminated from MSS, with greater reductions when more porphyrin was included in the filter. With the same mass of porphyrin in the filter, the reduction trend for B[a]P by porphyrins A-E was A > B > C > D > E. The reduction trend for TSNAs by porphyrin F was NNN > NAB > NNK > NAT. The porphyrin mode of action is possibly through strong ¦Ð-¦Ð interactions. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 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. 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. Precious metals and metal oxides on carrier materials are used in many industrial processes as heterogenous catalysts.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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

The photoinduced electron transfer of porphyrin-anthraquinone dyads bridged with alkoxy chains of different lengths was written by Zhao, Ping;Huang, Jin-Wang;Xu, Lian-Cai;Ma, Li;Ji, Liang-Nian. And the article was included in Spectrochimica Acta in 2011.Safety of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

The photoinduced electron transfer (PET) interaction in porphyrin containing donor-acceptor (D-A) mols. is of great importance in nature and a significant part of the PET research has been devoted to the study of its mechanism (“through-space” or “through-bond”) in these decades. The authors synthesized a series of covalently linked porphyrin-anthraquinone dyads (Por-C_n-AQ) bridged with flexible alkoxy chains with different lengths (n = 1, 4, 10) and investigated their intramol. PET using a combination of electronic absorption, steady-state fluorescence and decayed luminescence spectra. The exptl. results show that the PET efficiency depends on the length of the flexible linkage between the porphyrin and anthraquinone moieties. Meanwhile, theor. calculation applying the d. functional theory (DFT) was also carried out to give the frontier orbital distribution and the optimized structures of these dyads. It is found that the orientation of the dyad with high PET efficiency is disadvantageous to ¦Ð-¦Ð interaction. Thus, the PET of these dyads seemingly is best compatible with a “through-bond” (superexchange) mechanism. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Safety 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. 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.Safety of 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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

CIDNP study on porphyrin-photosensitized reactions with phenol and quinone. Dimerization of 4-methoxyphenol and cross coupling of benzoquinone to porphyrins covalently linked with phenol group was written by Maruyama, Kazuhiro;Furuta, Hiroyuki;Osuka, Atsuhiro. And the article was included in Tetrahedron in 1986.Category: catalyst-ligand The following contents are mentioned in the article:

Photoreactions of tetraphenylporphyrin (I) with phenols and/or quinones in C₆H₆ were studied mainly by the CIDNP technique. In the photoreactions of I with 4-MeOC₆H₄OH (II), CIDNP effects due to the radical anion of I and the radical cation of II were observed, while the generation of considerable amounts of 4-MeOC₆H₄O? was indicated by ESR and CIDPN in the system containing I, II, and p-benzoquinone (III). Based on these results, 2 new photoreactions leading to permanent products were developed, i.e., photosensitized dimerization of II and photo-induced cross coupling of III to porphyrins covalently linked with a phenol group. The unique role of phenol in the photo-induced electron transfer reaction of I and III in a non-polar solvent was discussed in terms of its dual function as both the proton and electron donor. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Category: catalyst-ligand).

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. Chiral compounds with high purities and ee values are often used as ligands for catalytically active metal complexes. Category: catalyst-ligand

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

A porphyrin-anthracene supramolecular system assembled via complementary nucleic acid base pairing was written by Sirish, Mallena;Maiya, Bhaskar G.. And the article was included in Journal of Porphyrins and Phthalocyanines in 1998.Electric Literature of C47H36N4O The following contents are mentioned in the article:

Covalently linked porphyrin-adenine [meso-5(4-(9-(2-oxyethyl)adenine)phenyl)-10,15,20-tritolylporphyrin] (1) and anthracene-thymine [1-(9-methylanthracene)thymine] (2) conjugates have been synthesized and fully characterized by elemental anal., FAB mass, UV-vis, ¹H NMR, fluorescence and cyclic voltammetric methods. Detailed ¹H NMR studies reveal that 1 and 2 self-assemble in CDCl₃ solutions at 293 ¡À 3 K to form a two-point hydrogen-bonded, bichromophoric, supramol. system 3 with a binding constant of 47 ¡À 5 M^-1 and that both Hoogsteen- and Watson-Crick-type A-T assemblies exist in solution under these exptl. conditions. Spectral and electrochem. data point out the possibility of occurrence of both energy and electron transfer reactions from the singlet excited state of 2 to 1 in the ensemble 3. The singlet state activity of the ensemble 3 has been probed mainly by the time-resolved fluorescence method and the results have been discussed in the light of those obtained earlier on similar “non-covalently” or covalently bound bichromophoric systems. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Electric Literature of C47H36N4O).

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 actual catalysts are metal complexes that are prepared from ligands and appropriate metal precursors.Electric Literature of C47H36N4O

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

A clamp-like biohybrid catalyst for DNA oxidation was written by van Dongen, Stijn F. M.;Clerx, Joost;Norgaard, Kasper;Bloemberg, Tom G.;Cornelissen, Jeroen J. L. M.;Trakselis, Michael A.;Nelson, Scott W.;Benkovic, Stephen J.;Rowan, Alan E.;Nolte, Roeland J. M.. And the article was included in Nature Chemistry in 2013.Recommanded Product: 57412-08-5 The following contents are mentioned in the article:

In processive catalysis, a catalyst binds to a substrate and remains bound as it performs several consecutive reactions, as exemplified by DNA polymerases. Processivity is essential in nature and is often mediated by a clamp-like structure that phys. tethers the catalyst to its (polymeric) template. In the case of the bacteriophage T4 replisome, a dedicated clamp protein acts as a processivity mediator by encircling DNA and subsequently recruiting its polymerase. Here we use this DNA-binding protein to construct a biohybrid catalyst. Conjugation of the clamp protein to a chem. catalyst with sequence-specific oxidation behavior formed a catalytic clamp that can be loaded onto a DNA plasmid. The catalytic activity of the biohybrid catalyst was visualized using a procedure based on an at. force microscopy method that detects and spatially locates oxidized sites in DNA. Varying the exptl. conditions enabled switching between processive and distributive catalysis and influencing the sliding direction of this rotaxane-like catalyst. 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. 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.Recommanded Product: 57412-08-5

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

Microwave-assisted expeditious O-alkylation of meso-hydroxyphenylporphyrins was written by Chaleix, Vincent;Couleaud, Pierre;Sol, Vincent;Zerrouki, Rachida;Alves, Sandra;Krausz, Pierre. And the article was included in Journal of Porphyrins and Phthalocyanines in 2009.Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol The following contents are mentioned in the article:

A mild method for O-alkylation of meso-hydroxyphenylporphyrin was developed using microwave irradiation This method is clean and efficient for many substrates and resulted in significant improvement in reaction yield and a dramatic decrease in reaction time in comparison to thermal heating. E.g., hydroxyphenylporphyrin I [R = C₆H₄-4-Me, R¹ = H] was reacted with BrCH₂CO₂Et in DMF using K₂CO₃ under microwave irradiation for 5 min gave the O-alkylation product I [R = C₆H₄-4-Me, R¹ = CH₂CO₂Et] with 95% yield. Similar reactions gave O-alkylation products, such as I [R = C₆H₄-4-Me, R¹ = (CH₂)₃OCOMe, (CH₂)₃CO₂Et, CH₂CH:CH₂, CH₂Cú·CH, CH₂CO₂CMe₃, CH(CH₂Me)CO₂Me], with high yields. This study involved multiple reactions and reactants, such as 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol (cas: 57412-08-5Recommanded Product: 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. Ligand design occupies a central place in organic synthesis and catalysis. Chiral compounds with high purities and ee values are often used as ligands for catalytically active metal complexes. Recommanded Product: 4-(10,15,20-Tri-p-tolylporphyrin-5-yl)phenol

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